* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
#define _GNU_SOURCE
#include <config.h>
#include "libsigrok-internal.h"
#include "protocol.h"
-SR_PRIV int send_serial_str(struct sr_serial_dev_inst *serial, char *str){
- int len=strlen(str);
- if((len>15)||(len<1)){ //limit length to catch errant strings
- sr_err("ERROR:Serial string len %d invalid ",len);
- return SR_ERR;
- }
- //100ms timeout. With USB CDC serial we can't define the timeout
- //based on link rate, so just pick something large as we shouldn't normally see them
- if(serial_write_blocking(serial,str,len,100) != len){
- sr_err("ERROR:Serial str write failed");
- return SR_ERR;
- }
-
- return SR_OK;
+SR_PRIV int send_serial_str(struct sr_serial_dev_inst *serial, char *str)
+{
+ int len = strlen(str);
+ if ((len > 15) || (len < 1)) {
+ sr_err("ERROR: Serial string len %d invalid ", len);
+ return SR_ERR;
+ }
+
+ /* 100ms timeout. With USB CDC serial we can't define the timeout based
+ * on link rate, so just pick something large as we shouldn't normally
+ * see them */
+ if (serial_write_blocking(serial, str, len, 100) != len) {
+ sr_err("ERROR: Serial str write failed");
+ return SR_ERR;
+ }
+
+ return SR_OK;
}
-SR_PRIV int send_serial_char(struct sr_serial_dev_inst *serial, char ch){
- char buf[1];
- buf[0]=ch;
- if(serial_write_blocking(serial,buf,1,100) != 1){ //100ms
- sr_err("ERROR:Serial char write failed");
- return SR_ERR;
- }
- return SR_OK;
-}
-//Issue a command that expects a string return, return length of string
-int send_serial_w_resp(struct sr_serial_dev_inst *serial, char *str,char *resp,size_t cnt){
- int num_read,i;
- send_serial_str(serial,str);
- //Using the serial_read_blocking function when reading a response of unknown length requires
- //a long worst case timeout to always be taken. So, instead loop waiting for a first byte, and
- //then a final small delay for the rest.
- for(i=0;i<1000;i++){ //wait up to 1 second in ms increments
- num_read = serial_read_blocking(serial, resp, cnt, 1);
- if(num_read>0) break;
- }
- //sr_spew("rwprsp1 i %d nr %d",i,num_read);
- //Since the serial port is usb CDC we can't calculate timeouts based on baud rate but
- //even if the response is split between two USB transfers 10ms should be plenty.
- num_read+= serial_read_blocking(serial, &(resp[num_read]), cnt-num_read, 10);
- //sr_spew("rwrsp2 nr %d",num_read);
-
- if ((num_read < 1)||(num_read>30)) {
- sr_err("ERROR:Serial_w_resp failed (%d).", num_read);
- return -1;
- }else{
- return num_read;
- }
-}
-//Issue a command that expects a single char ack
-SR_PRIV int send_serial_w_ack(struct sr_serial_dev_inst *serial, char *str){
- char buf[2];
- int num_read;
- //In case we have left over transfer from the device, drain them
- while((num_read=serial_read_blocking(serial, buf, 2, 10))){
- //sr_dbg("swack drops 2 previous bytes %d %d",buf[0],buf[1]);
- }
- send_serial_str(serial,str);
- //1000ms timeout
- num_read =serial_read_blocking(serial, buf, 1, 1000);
- if ((num_read == 1)&&(buf[0]=='*')) {
- return SR_OK;
- }else{
- sr_err("ERROR:Serial_w_ack %s failed (%d).", str,num_read);
- if(num_read){
- sr_err("ack resp char %c d %d\n\r",buf[0],buf[0]);
- }
- return SR_ERR;
- }
-}
-
-//Process incoming data stream assuming it is optimized packing of 4 channels or less
-//Each byte is 4 channels of data and a 3 bit rle value, or a larger rle value, or a control signal.
-//This also checks for aborts and ends.
-//If an end is seen we stop processing but do not check the byte_cnt
-//The output is a set of samples fed to process group to perform sw triggering and sending of data to the session
-//as well as maintenance of the serial rx byte cnt.
-//Since we can get huge rle values we chop them up for processing into smaller groups
-//In this mode we can always consume all bytes because there are no cases where the processing of one
-//byte requires the one after it.
-void process_D4(struct sr_dev_inst *sdi,struct dev_context *d){
- int32_t j;
- uint8_t cbyte;
- uint8_t cval;
- uint32_t rlecnt=0;
- uint32_t sampcnt=0; //number of samples received with no rles
- while(d->ser_rdptr < d->bytes_avail){
- cbyte=d->buffer[(d->ser_rdptr)];
- //RLE only byte
- if(cbyte>=48 && cbyte<=127){
- rlecnt+=(cbyte-47)*8;
- d->byte_cnt++;
- }else if(cbyte>=0x80){ //sample with possible rle
- rlecnt+=(cbyte&0x70)>>4;
- if(rlecnt){
- //On a value change, duplicate the previous values first.
- //The maximum value of one rle is 640.
- //To ensure we don't overflow the sample buffer but still send it large chunks of data
- //(to make the packet sends to the session efficient) only call process group after
- //a large number of samples have been seen.
- //Likely we could use the max rle value of 640 but 2048 gives some extra room.
- if((rlecnt+d->cbuf_wrptr)>(d->sample_buf_size-2048)){
- //process_group is sent the number of slices which is just the cbufwrptr divided by the slice size
- //This modulo check should never happen as long the calculations for dig_sample_bytes etc are
- //correct, but it's a good cross check for code development.
- if((d->cbuf_wrptr)%(d->dig_sample_bytes)){
- sr_err("Modulo fail %d %d ",d->cbuf_wrptr,d->dig_sample_bytes);
- }
- process_group(sdi,d,(d->cbuf_wrptr/d->dig_sample_bytes));
- }
- rle_memset(d,rlecnt);
- rlecnt=0;
- sampcnt=0;
- }
- //Finally add in the new values
- cval=cbyte&0xF;
- d->d_data_buf[d->cbuf_wrptr++]=cval;
- //pad in all other bytes since the sessions even wants disabled channels reported
- for(j=1;j<d->dig_sample_bytes;j++){
- d->d_data_buf[d->cbuf_wrptr++]=0;
- }
- sampcnt++;
- d->byte_cnt++;
- sr_spew("Dchan4 rdptr %d wrptr %d bytein 0x%X rle %d cval 0x%X\n",
- (d->ser_rdptr)-1,d->cbuf_wrptr,cbyte,rlecnt,cval);
- rlecnt=0;
-
- d->d_last[0]=cval;
- }
- //Any other character ends parsing - it could be a frame error or a start of the final byte cnt
- else {
- if(cbyte=='$'){
- sr_info("D4 Data stream stops with cbyte %d char %c rdidx %d cnt %llu",cbyte,cbyte,d->ser_rdptr,d->byte_cnt);
- d->rxstate=RX_STOPPED;
- }else{
- sr_err("D4 Data stream aborts with cbyte %d char %c rdidx %d cnt %llu",cbyte,cbyte,d->ser_rdptr,d->byte_cnt);
- d->rxstate=RX_ABORT;
- }
- break; //break from while loop
- }
- (d->ser_rdptr)++;
- }//while rdptr < wrptr
- sr_spew("D4 while done rdptr %d",d->ser_rdptr);
- //If we reach the end of the serial input stream send any remaining values or rles to the session
- /*this can also be skipped now the rle_memset handles cbufwrptr
- if(sampcnt){
- process_group(sdi,d,sampcnt);
- sampcnt=0;
- }
- */
- if(rlecnt){
- sr_spew("Residual D4 slice rlecnt %d",rlecnt);
- rle_memset(d,rlecnt);
- }
- if(d->cbuf_wrptr){
- sr_spew("Residual D4 data wrptr %d",d->cbuf_wrptr);
- process_group(sdi,d,d->cbuf_wrptr/d->dig_sample_bytes);
-
- }
-
-}//Process_D4
-
-//Process incoming data stream and forward to trigger processing with process_group
-//The final value of ser_rdptr indicates how many bytes were processed.
-//This version handles all other enabled channel configurations that Process_D4 doesn't
-void process_slice(struct sr_dev_inst *sdi,struct dev_context *devc){
- int32_t i;
- uint32_t tmp32;
- uint8_t cbyte;
- uint32_t slices_avail=0;
- uint32_t cword;
- uint32_t slice_bytes; //number of bytes that have legal slice values
- //Only process legal data values for this mode which are >=0x80
- for(slice_bytes=1;(slice_bytes<devc->bytes_avail)&&(devc->buffer[slice_bytes-1]>=0x80);slice_bytes++);
- if(slice_bytes!=devc->bytes_avail){
- cbyte=devc->buffer[slice_bytes-1];
- slice_bytes--; //Don't process the ending character
- if(cbyte=='$'){
- sr_info("Data stream stops with cbyte %d char %c rdidx %d sbytes %d cnt %llu",cbyte,cbyte,devc->ser_rdptr,slice_bytes,devc->byte_cnt);
- devc->rxstate=RX_STOPPED;
- }else{
- sr_err("Data stream aborts with cbyte %d char %c rdidx %d sbytes %d cnt %llu",cbyte,cbyte,devc->ser_rdptr,slice_bytes,devc->byte_cnt);
- devc->rxstate=RX_ABORT;
- }
- }
- //If the wrptr is non-zero due to a residual from the previous serial transfer don't double count it towards byte_cnt
- devc->byte_cnt+=slice_bytes-(devc->wrptr);
- sr_spew("process slice avail %d rdptr %d sb %d byte_cnt %d",devc->bytes_avail,devc->ser_rdptr,slice_bytes,devc->byte_cnt);
- //Must have a full slice
- while((devc->ser_rdptr+devc->bytes_per_slice)<=slice_bytes){
- //The use of devc->cbuf_wrptr is different between analog and digital.
- //For analog it targets a float sized offset for that channel's buffer
- //For digital it targets a bit, so the 3 lsbs are bit offsets within a byte
- slices_avail++;
- cword=0;
- //build up a word 7 bits at a time, using only enabled channels
- for(i=0;i<devc->num_d_channels;i+=7){
- if(((devc->d_chan_mask)>>i)&0x7F){
- cword|=((devc->buffer[devc->ser_rdptr])&0x7F)<<i;
- (devc->ser_rdptr)++;
- }
- }
- //and then distribute 8 bits at a time to all possible channels
- for(i=0;i<devc->num_d_channels;i+=8){
- uint32_t idx=((devc->cbuf_wrptr)*devc->dig_sample_bytes)+(i>>3);
- devc->d_data_buf[idx]=cword&0xFF;
- sr_spew("Dchan i %d wrptr %d idx %d char 0x%X cword 0x%X",i,devc->cbuf_wrptr,idx,devc->d_data_buf[idx],cword);
- cword>>=8;
- }
- //Each analog value is a 7 bit value
- for(i=0;i<devc->num_a_channels;i++){
- if((devc->a_chan_mask>>i)&1){
- //a_size is depracted and must always be 1B
- tmp32=devc->buffer[devc->ser_rdptr]-0x80;
- devc->a_data_bufs[i][devc->cbuf_wrptr]=((float)tmp32 * devc->a_scale[i])+devc->a_offset[i];
- devc->a_last[i]=devc->a_data_bufs[i][devc->cbuf_wrptr];
- sr_spew("AChan %d t32 %d value %f wrptr %d rdptr %d sc %d off %d",i,tmp32,devc->a_data_bufs[i][devc->cbuf_wrptr],devc->cbuf_wrptr,devc->ser_rdptr,devc->a_scale[i],devc->a_offset[i]);
- devc->ser_rdptr++;
- }//if channel enabled
- }//for num_a_channels
- devc->cbuf_wrptr++;
- }//While another slice available
- if(slices_avail){
- process_group(sdi,devc,slices_avail);
- }
+SR_PRIV int send_serial_char(struct sr_serial_dev_inst *serial, char ch)
+{
+ char buf[1];
+ buf[0] = ch;
+
+ if (serial_write_blocking(serial, buf, 1, 100) != 1) { /* 100ms */
+ sr_err("ERROR: Serial char write failed");
+ return SR_ERR;
+ }
+
+ return SR_OK;
+}
+
+/* Issue a command that expects a string return that is less than 30 characters.
+ * Returns the length of string */
+int send_serial_w_resp(struct sr_serial_dev_inst *serial, char *str,
+ char *resp, size_t cnt)
+{
+ int num_read, i;
+ send_serial_str(serial, str);
+
+ /* Using the serial_read_blocking function when reading a response of
+ * unknown length requires a long worst case timeout to always be taken.
+ * So, instead loop waiting for a first byte, and then a final small delay
+ * for the rest. */
+ for (i = 0; i < 1000; i++) { /* wait up to 1 second in ms increments */
+ num_read = serial_read_blocking(serial, resp, cnt, 1);
+ if (num_read > 0)
+ break;
+ }
+
+ /* Since the serial port is USB CDC we can't calculate timeouts based on
+ * baud rate but even if the response is split between two USB transfers,
+ * 10ms should be plenty. */
+ num_read += serial_read_blocking(serial, &(resp[num_read]), cnt - num_read,
+ 10);
+ if ((num_read < 1) || (num_read > 30)) {
+ sr_err("ERROR: Serial_w_resp failed (%d).", num_read);
+ return -1;
+ } else
+ return num_read;
}
-//Send the processed analog values to the session
-int send_analog(struct sr_dev_inst *sdi,struct dev_context *devc,uint32_t num_samples, uint32_t offset){
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct sr_analog_encoding encoding;
- struct sr_analog_meaning meaning;
- struct sr_analog_spec spec;
- struct sr_channel *ch;
- uint32_t i;
- float *fptr;
-
- sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS);
- for(i=0;i<devc->num_a_channels;i++){
- if((devc->a_chan_mask>>i)&1){
- ch=devc->analog_groups[i]->channels->data;
- analog.meaning->channels = g_slist_append(NULL, ch);
- analog.num_samples = num_samples;
- analog.data = (devc->a_data_bufs[i]) + offset;
- fptr=analog.data;
- sr_spew("send analog num %d offset %d first %f 2 %f",num_samples,offset,*(devc->a_data_bufs[i]),*fptr);
- analog.meaning->mq = SR_MQ_VOLTAGE;
- analog.meaning->unit = SR_UNIT_VOLT;
- analog.meaning->mqflags = 0;
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- sr_session_send(sdi, &packet);
- g_slist_free(analog.meaning->channels);
- } //if enabled
- }//for channels
- return 0;
+/* Issue a command that expects a single char ack */
+SR_PRIV int send_serial_w_ack(struct sr_serial_dev_inst *serial, char *str)
+{
+ char buf[2];
+ int num_read;
+
+ /* In case we have left over transfer from the device, drain them.
+ * These should not exist in normal operation */
+ while ((num_read = serial_read_blocking(serial, buf, 2, 10)))
+ sr_dbg("swack drops 2 bytes %d %d", buf[0], buf[1]);
+
+ send_serial_str(serial, str);
+
+ /* 1000ms timeout */
+ num_read = serial_read_blocking(serial, buf, 1, 1000);
+
+ if ((num_read == 1) && (buf[0] == '*')) {
+ return SR_OK;
+ } else {
+ sr_err("ERROR: Serial_w_ack %s failed (%d).", str, num_read);
+ if (num_read)
+ sr_err("ack resp char %c d %d", buf[0], buf[0]);
+ return SR_ERR;
+ }
}
-//Send the ring buffer of pre-trigger analog samples.
-// The entire buffer is sent (as long as it filled once), but need send two payloads split at the
-// the writeptr
-int send_analog_ring(struct sr_dev_inst *sdi,struct dev_context *devc,uint32_t num_samples){
- struct sr_datafeed_packet packet;
- struct sr_datafeed_analog analog;
- struct sr_analog_encoding encoding;
- struct sr_analog_meaning meaning;
- struct sr_analog_spec spec;
- struct sr_channel *ch;
- int i;
- uint32_t num_pre,start_pre;
- uint32_t num_post,start_post;
- num_pre=(num_samples>=devc->pretrig_wr_ptr) ? devc->pretrig_wr_ptr : num_samples;
- start_pre=devc->pretrig_wr_ptr-num_pre;
- num_post=num_samples-num_pre;
- start_post=devc->pretrig_entries-num_post;
- sr_spew("send_analog ring wrptr %u ns %d npre %u spre %u npost %u spost %u",devc->pretrig_wr_ptr,num_samples,num_pre,start_pre,num_post,start_post);
- float *fptr;
- sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS);
- for(i=0;i<devc->num_a_channels;i++){
- if((devc->a_chan_mask>>i)&1){
- ch=devc->analog_groups[i]->channels->data;
- analog.meaning->channels = g_slist_append(NULL, ch);
- analog.meaning->mq = SR_MQ_VOLTAGE;
- analog.meaning->unit = SR_UNIT_VOLT;
- analog.meaning->mqflags = 0;
- packet.type = SR_DF_ANALOG;
- packet.payload = &analog;
- //First send what is after the write pointer because it is oldest
- if(num_post){
- analog.num_samples = num_post;
- analog.data = (devc->a_pretrig_bufs[i]) + start_post;
- //sr_spew("ring buf %d starts at %p",i,(void *) devc->a_pretrig_bufs[i]);
- //sr_spew("analog data %d starts at %p",i,(void *) analog.data);
- //sr_spew("Sending A%d ring buffer oldest ",i);
- for(uint32_t j=0;j<analog.num_samples;j++){
- fptr=analog.data+(j*sizeof(float));
- //sr_spew("RNGDCT%d j %d %f %p",i,j,*fptr,(void *)fptr);
- }
- sr_session_send(sdi, &packet);
- }
- if(num_pre){
- analog.num_samples = num_pre;
- analog.data = (devc->a_pretrig_bufs[i])+start_pre;
- sr_dbg("Sending A%d ring buffer newest ",i);
- for(uint32_t j=0;j<analog.num_samples;j++){
- fptr=analog.data+(j*sizeof(float));
- sr_spew("RNGDCW%d j %d %f %p",i,j,*fptr,(void *)fptr);
- }
- sr_session_send(sdi, &packet);
- }
- g_slist_free(analog.meaning->channels);
- sr_dbg("Sending A%d ring buffer done ",i);
- } //if enabled
- }//for channels
- return 0;
+/* Process incoming data stream assuming it is optimized packing of 4 channels
+ * or less.
+ * Each byte is 4 channels of data and a 3 bit rle value, or a larger rle value,
+ * or a control signal. This also checks for aborts and ends.
+ * If an end is seen we stop processing but do not check the byte_cnt
+ * The output is a set of samples fed to process group to perform sw triggering
+ * and sending of data to the session as well as maintenance of the serial rx
+ * byte cnt.
+ * Since we can get huge rle values we chop them up for processing into smaller
+ * groups.
+ * In this mode we can always consume all bytes because there are no cases where
+ * the processing of one byte requires the one after it. */
+void process_D4(struct sr_dev_inst *sdi, struct dev_context *d)
+{
+ uint32_t j;
+ uint8_t cbyte, cval;
+ uint32_t rlecnt = 0;
+
+ while (d->ser_rdptr < d->bytes_avail) {
+ cbyte = d->buffer[(d->ser_rdptr)];
+
+ /*RLE only byte */
+ if ((cbyte >= 48) && (cbyte <= 127)) {
+ rlecnt += (cbyte - 47) * 8;
+ d->byte_cnt++;
+ } else if (cbyte >= 0x80) { /* sample with possible rle */
+ rlecnt += (cbyte & 0x70) >> 4;
+ if (rlecnt) {
+ /* On a value change, duplicate the previous values first. */
+ rle_memset(d, rlecnt);
+ rlecnt = 0;
+ }
+ /* Finally add in the new values */
+ cval = cbyte & 0xF;
+ uint32_t didx = (d->cbuf_wrptr) * (d->dig_sample_bytes);
+ d->d_data_buf[didx] = cval;
+
+ /* Pad in all other bytes since the sessions even wants disabled
+ * channels reported */
+ for (j = 1; j < d->dig_sample_bytes; j++)
+ d->d_data_buf[didx+j] = 0;
+
+ d->byte_cnt++;
+ sr_spew("Dchan4 rdptr %d wrptr %d bytein 0x%X rle %d cval 0x%X didx %d",
+ (d->ser_rdptr) - 1, d->cbuf_wrptr, cbyte, rlecnt, cval, didx);
+ d->cbuf_wrptr++;
+ rlecnt = 0;
+ d->d_last[0] = cval;
+ } else {
+ /* Any other character ends parsing - it could be a frame error or a
+ * start of the final byte cnt */
+ if (cbyte == '$') {
+ sr_info("D4 Data stream stops with cbyte %d char %c rdidx %d cnt %lu",
+ cbyte, cbyte, d->ser_rdptr, d->byte_cnt);
+ d->rxstate = RX_STOPPED;
+ } else {
+ sr_err("D4 Data stream aborts with cbyte %d char %c rdidx %d cnt %lu",
+ cbyte, cbyte, d->ser_rdptr, d->byte_cnt);
+ d->rxstate = RX_ABORT;
+ }
+ break; /* break from while loop */
+ }
+
+ (d->ser_rdptr)++;
+ /* To ensure we don't overflow the sample buffer, but still send it
+ * large chunks of data (to make the packet sends to the session
+ * efficient) only call process group after a large number of samples
+ * have been seen. cbuf_wrptr counts slices, so shift right by 2 to
+ * create a worst case x4 multiple ratio of cbuf_wrptr value to the
+ * depth of the sample buffer.
+ * Likely we could use the max rle value of 640 but 1024 gives some
+ * extra room. Also do a simple check of rlecnt>2000 since that is a
+ * reasonable minimal value to send to the session */
+ if ((rlecnt >= 2000) || \
+ ((rlecnt + ((d->cbuf_wrptr) <<2 ))) > (d->sample_buf_size - 1024)) {
+ sr_spew("D4 preoverflow wrptr %d bufsize %d rlecnt %d\n\r",
+ d->cbuf_wrptr, d->sample_buf_size, rlecnt);
+ rle_memset(d, rlecnt);
+ process_group(sdi, d, d->cbuf_wrptr);
+ rlecnt = 0;
+ }
+
+ } /*while rdptr < wrptr*/
+
+ sr_spew("D4 while done rdptr %d", d->ser_rdptr);
+
+ /* If we reach the end of the serial input stream send any remaining values
+ * or rles to the session */
+ if (rlecnt) {
+ sr_spew("Residual D4 slice rlecnt %d", rlecnt);
+ rle_memset(d, rlecnt);
+ }
+ if (d->cbuf_wrptr) {
+ sr_spew("Residual D4 data wrptr %d", d->cbuf_wrptr);
+ process_group(sdi, d, d->cbuf_wrptr);
+ }
}
-//Given a chunk of slices forward to trigger check or session as appropriate and update state
-//these could be real slices or those generated by rles
-int process_group(struct sr_dev_inst *sdi,struct dev_context *devc,uint32_t num_slices){
- int trigger_offset;
- int pre_trigger_samples;
- //These are samples sent to session and are less than num_slices if we reach limit_samples
- size_t num_samples;
- struct sr_datafeed_logic logic;
- struct sr_datafeed_packet packet;
- int i;
- size_t cbuf_wrptr_cpy;
- cbuf_wrptr_cpy=devc->cbuf_wrptr;
- //regardless of whether we forward samples on or not (because we aren't triggered), always reset the
- //pointer into the device data buffers
- devc->cbuf_wrptr=0;
- if(devc->trigger_fired){ //send directly to session
- if (devc->limit_samples &&
- num_slices > devc->limit_samples - devc->sent_samples){
- num_samples = devc->limit_samples - devc->sent_samples;
- }else{
- num_samples=num_slices;
- }
- if(num_samples>0) {
- sr_spew("Process_group sending %d post trig samples dsb %d",num_samples,devc->dig_sample_bytes);
- //for(int z=0;(z<num_samples);z+=2){
- // sr_spew("0x%X ",devc->d_data_buf[z]);
- //}
- if(devc->num_d_channels){
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- //Size the number of bytes required to fit all of the channels
- logic.unitsize = devc->dig_sample_bytes;
- //The total length of the array sent
- logic.length=num_samples*logic.unitsize;
- logic.data = devc->d_data_buf;
- sr_session_send(sdi, &packet);
+/* Process incoming data stream and forward to trigger processing with
+ * process_group
+ * The final value of ser_rdptr indicates how many bytes were processed.
+ * This version handles all other enabled channel configurations that
+ * Process_D4 doesn't */
+void process_slice(struct sr_dev_inst *sdi, struct dev_context *devc)
+{
+ int32_t i;
+ uint32_t tmp32, cword;
+ uint8_t cbyte;
+ uint32_t slice_bytes; /* Number of bytes that have legal slice values including RLE */
+
+ /* Only process legal data values for this mode which are 0x32-0x7F for RLE and 0x80 to 0xFF for data*/
+ for (slice_bytes = 1; (slice_bytes < devc->bytes_avail)
+ && (devc->buffer[slice_bytes - 1] >= 0x30); slice_bytes++);
+
+ if (slice_bytes != devc->bytes_avail) {
+ cbyte = devc->buffer[slice_bytes - 1];
+ slice_bytes--; /* Don't process the ending character */
+ if (cbyte == '$') {
+ sr_info("Data stream stops with cbyte %d char %c rdidx %d sbytes %d cnt %lu",
+ cbyte, cbyte, devc->ser_rdptr, slice_bytes, devc->byte_cnt);
+ devc->rxstate = RX_STOPPED;
+ } else {
+ sr_err("Data stream aborts with cbyte %d char %c rdidx %d sbytes %d cnt %lu",
+ cbyte, cbyte, devc->ser_rdptr, slice_bytes, devc->byte_cnt);
+ devc->rxstate = RX_ABORT;
+ }
+ }
+
+ /* If the wrptr is non-zero due to a residual from the previous serial
+ * transfer, don't double count it towards byte_cnt*/
+ devc->byte_cnt += slice_bytes - (devc->wrptr);
+
+ sr_spew("process slice avail %d rdptr %d sb %d byte_cnt %" PRIu64 "",
+ devc->bytes_avail, devc->ser_rdptr, slice_bytes, devc->byte_cnt);
+
+ /* Must have a full slice or one rle byte */
+ while (((devc->ser_rdptr + devc->bytes_per_slice) <= slice_bytes)
+ || ((devc->ser_rdptr < slice_bytes) &&
+ (devc->buffer[devc->ser_rdptr] < 0x80))) {
+
+ if (devc->buffer[devc->ser_rdptr] < 0x80) {
+ int16_t rlecnt;
+ if (devc->buffer[devc->ser_rdptr] <= 79)
+ rlecnt = devc->buffer[devc->ser_rdptr] - 47;
+ else
+ rlecnt = (devc->buffer[devc->ser_rdptr] - 78) * 32;
+
+ sr_info("RLEcnt of %d in %d", rlecnt, devc->buffer[devc->ser_rdptr]);
+ if ((rlecnt < 1) || (rlecnt > 1568))
+ sr_err("Bad rlecnt val %d in %d",
+ rlecnt, devc->buffer[devc->ser_rdptr]);
+ else
+ rle_memset(devc,rlecnt);
+
+ devc->ser_rdptr++;
+
+ } else {
+ cword = 0;
+ /* Build up a word 7 bits at a time, using only enabled channels */
+ for (i = 0; i < devc->num_d_channels; i += 7) {
+ if (((devc->d_chan_mask) >> i) & 0x7F) {
+ cword |= ((devc->buffer[devc->ser_rdptr]) & 0x7F) << i;
+ (devc->ser_rdptr)++;
+ }
+ }
+ /* And then distribute 8 bits at a time to all possible channels
+ * but first save of cword for rle */
+ devc->d_last[0] = cword & 0xFF;
+ devc->d_last[1] = (cword >> 8) & 0xFF;
+ devc->d_last[2] = (cword >> 16) & 0xFF;
+ devc->d_last[3] = (cword >> 24) & 0xFF;
+
+ for (i = 0; i < devc->num_d_channels; i += 8) {
+ uint32_t idx = ((devc->cbuf_wrptr) * devc->dig_sample_bytes) +
+ (i >> 3);
+ devc->d_data_buf[idx] = cword & 0xFF;
+ sr_spew("Dchan i %d wrptr %d idx %d char 0x%X cword 0x%X",
+ i, devc->cbuf_wrptr, idx, devc->d_data_buf[idx], cword);
+ cword >>= 8;
+ }
+
+ /* Each analog value is one or more 7 bit values */
+ for (i = 0; i < devc->num_a_channels; i++) {
+ if ((devc->a_chan_mask >> i) & 1) {
+
+ tmp32 =
+ devc->buffer[devc->ser_rdptr] - 0x80;
+ for(int a=1;a<devc->a_size;a++){
+ tmp32+=(devc->buffer[(devc->ser_rdptr)+a] - 0x80)<<(7*a);
+ }
+ devc->a_data_bufs[i][devc->cbuf_wrptr] =
+ ((float) tmp32 * devc->a_scale[i]) +
+ devc->a_offset[i];
+ devc->a_last[i] =
+ devc->a_data_bufs[i][devc->cbuf_wrptr];
+ sr_spew
+ ("AChan %d t32 %d value %f wrptr %d rdptr %d sc %f off %f",
+ i, tmp32,
+ devc->
+ a_data_bufs[i][devc->cbuf_wrptr],
+ devc->cbuf_wrptr, devc->ser_rdptr,
+ devc->a_scale[i], devc->a_offset[i]);
+ devc->ser_rdptr+=devc->a_size;
+ } /*if channel enabled*/
+ } /*for num_a_channels*/
+ devc->cbuf_wrptr++;
+ }/*Not an RLE */
+ /*RLEs can create a large number of samples relative to the incoming serial buffer
+ To prevent overflow of the sample data buffer we call process_group.
+ cbuf_wrptr and sample_buf_size are both in terms of slices
+ 2048 is more than needed for a max rle of 1640 on the next incoming character */
+ if((devc->cbuf_wrptr +2048) > devc->sample_buf_size){
+ sr_spew("Drain large buff %d %d\n\r",devc->cbuf_wrptr,devc->sample_buf_size);
+ process_group(sdi, devc, devc->cbuf_wrptr);
+
}
- send_analog(sdi,devc,num_samples,0);
- }//num_sample>0
- devc->sent_samples+=num_samples;
- return 0;
- } //trigger_fired
- else{
- size_t num_ring_samples;
- size_t sptr;
- size_t eptr;
- size_t numtail;
- size_t numwrap;
- size_t srcptr;
- //sr_spew("Process_group check %d pre trig samples",num_slices);
- //The trigger_offset is -1 if no trigger is found, but if a trigger is found
- //then trigger_offset is the offset into the data buffer sent to it.
- //The pre_trigger_samples is the total number of samples before the trigger, but limited to
- //the size of the ring buffer set by the capture_ratio. So the pre_trigger_samples can include both the new samples
- //and the ring buffer, but trigger_offset is only in relation to the new samples
- trigger_offset = soft_trigger_logic_check(devc->stl,
- devc->d_data_buf, num_slices * devc->dig_sample_bytes, &pre_trigger_samples);
- //A trigger offset >=0 indicate a trigger was seen. The stl will isue the trigger to the session
- //and will forward all pre trigger logic samples, but we must send any post trigger logic
- //and all pre and post trigger analog signals
- // sr_dbg("trggr_off %d",trigger_offset);
- // sr_dbg("pre_samp %d",pre_trigger_samples);
- if (trigger_offset > -1) {
- devc->trigger_fired = TRUE;
- devc->sent_samples += pre_trigger_samples;
- packet.type = SR_DF_LOGIC;
- packet.payload = &logic;
- num_samples = num_slices - trigger_offset;
-//Since we are in continuous mode for SW triggers it is possible to get more samples than limit_samples, so
-//once the trigger fires make sure we don't get beyond limit samples. At this point sent_samples should
-//be equal to pre_trigger_samples (just added above) because without being triggered we'd never increment
-//sent_samples.
-//This number is the number of post trigger logic samples to send to the session, the number of floats
-//is larger because of the analog ring buffer we track.
- if (devc->limit_samples &&
- num_samples > devc->limit_samples - devc->sent_samples)
- num_samples = devc->limit_samples - devc->sent_samples;
- //The soft trigger logic issues the trigger and sends packest for all logic data that was pretrigger
- //so only send what is left
- if(num_samples>0){
- sr_dbg("Sending post trigger logical remainder of %d",num_samples);
- logic.length = num_samples * devc->dig_sample_bytes;
- logic.unitsize = devc->dig_sample_bytes;
- logic.data = devc->d_data_buf + (trigger_offset * devc->dig_sample_bytes);
- devc->sent_samples += num_samples;
- sr_session_send(sdi, &packet);
- }
- size_t new_start,new_end,new_samples,ring_samples;
- //Figure out the analog data to send.
- //We might need to send:
- //-some or all of incoming data
- //-all of incoming data and some of ring buffer
- //-all of incoming data and all of ring buffer (and still might be short)
- //We don't need to compare to limit_samples because pretrig_entries can never be more than limit_samples
- //trigger offset indicatese where in the new samples the trigger was, but we need to go back pretrig_entries before it
- new_start=(trigger_offset>(int)devc->pretrig_entries) ? trigger_offset-devc->pretrig_entries : 0;
- //Note that we might not have gotten all the pre triggerstore data we were looking for. In such a case the sw trigger
- //logic seems to fill up to the limit_samples and thus the ratio is off, but we get the full number of samples
- //The number of entries in the ring buffer is pre_trigger_samples-trigger_offset so subtract that from limit samples
- //as a threshold
- new_end=MIN(num_slices-1,devc->limit_samples-(pre_trigger_samples-trigger_offset)-1);
- //This includes pre and post trigger storage.
- new_samples=new_end-new_start+1;
- //pre_trigger_samples can never be greater than trigger_offset by more than the ring buffer depth (pretrig entries)
- ring_samples=(pre_trigger_samples>trigger_offset) ? pre_trigger_samples-trigger_offset : 0;
- sr_spew("SW trigger float info newstart %zu new_end %zu new_samp %zu ring_samp %zu",new_start,new_end,new_samples,ring_samples);
- if(ring_samples>0){
- send_analog_ring(sdi,devc,ring_samples);
- }
- if(new_samples){
- send_analog(sdi,devc,new_samples,new_start);
- }
-
- }//if trigger_offset
- else { //We didn't trigger but need to copy to ring buffer
- if((devc->a_chan_mask)&&(devc->pretrig_entries)){
- //The incoming data buffer could be much larger than the ring buffer, so never copy more than
- //the size of the ring buffer
- num_ring_samples=num_slices > devc->pretrig_entries ? devc->pretrig_entries : num_slices;
- sptr=devc->pretrig_wr_ptr; //starting pointer to copy to
- //endptr can't go past the end
- eptr=(sptr+num_ring_samples)>=devc->pretrig_entries ? devc->pretrig_entries-1 : sptr+num_ring_samples-1;
- numtail=(eptr-sptr)+1; //number of samples to copy to the tail of ring buffer without wrapping
- numwrap=(num_ring_samples>numtail) ? num_ring_samples-numtail:0;
- //cbuf_wrptr points to where the next write should go, not theactual write data
- srcptr=cbuf_wrptr_cpy-num_ring_samples;
- sr_spew("RNG num %zu sptr %zu eptr %zu ",num_ring_samples,sptr,eptr);
- //sr_spew("RNG srcptr %zu nt %zu nw %zu",srcptr,numtail,numwrap);
- for(i=0;i<devc->num_a_channels;i++){
- if((devc->a_chan_mask>>i)&1){
- //copy tail
- for(uint32_t j=0;j<numtail;j++){
- devc->a_pretrig_bufs[i][sptr+j]=devc->a_data_bufs[i][srcptr+j];
- //sr_spew("RNGCpyT C%d src %zu dest %zu",i,srcptr+j,sptr+j);
- }//for j
- } //if chan_mask
- }//for channels
- //Copy wrap
- srcptr+=numtail;
- for(i=0;i<devc->num_a_channels;i++){
- if((devc->a_chan_mask>>i)&1){
- for(uint32_t j=0;j<numwrap;j++){
- devc->a_pretrig_bufs[i][j]=devc->a_data_bufs[i][srcptr+j];
- //sr_spew("RNGCpyW C%d src %zu dest %zu",i,srcptr+j,j);
- }//for j
- }//if chan_mask
- }//for channels
- devc->pretrig_wr_ptr=(numwrap) ? numwrap : (eptr+1)%devc->pretrig_entries;
- //sr_dbg("RNG pwrptr new %u",devc->pretrig_wr_ptr);
- }//if any analog channel enabled and pretrig_entries
- }//else (trigger not detected)
- }//trigger not set on function entry
- return 0;
-}//process_group
-
-
-//Duplicate previous sample values
-//This function relies on the caller to ensure d_data_buf has samples to handle the full value of the rle
-void rle_memset(struct dev_context *devc,uint32_t num_slices){
- uint32_t j,k;
- sr_spew("rle_memset val 0x%X,slices %d dsb %ld\n",devc->d_last[0],num_slices,devc->dig_sample_bytes);
- //Even if a channel is disabled, PV expects the same location and size for the enabled
- // channels as if the channel were enabled.
- for(j=0;j<num_slices;j++){
- for(k=0;k<devc->dig_sample_bytes;k++){
- devc->d_data_buf[devc->cbuf_wrptr++]=devc->d_last[k];
- //sr_spew("k %d j %d v 0x%X",k,j,devc->d_data_buf[(devc->cbuf_wrptr)-1]);
- }
- }
+ }/* While another slice or RLE available */
+ if (devc->cbuf_wrptr){
+ process_group(sdi, devc, devc->cbuf_wrptr);
+ }
+
+}
+
+/* Send the processed analog values to the session */
+int send_analog(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_samples, uint32_t offset)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ struct sr_analog_encoding encoding;
+ struct sr_analog_meaning meaning;
+ struct sr_analog_spec spec;
+ struct sr_channel *ch;
+ uint32_t i;
+ float *fptr;
+
+ sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS);
+ for (i = 0; i < devc->num_a_channels; i++) {
+ if ((devc->a_chan_mask >> i) & 1) {
+ ch = devc->analog_groups[i]->channels->data;
+ analog.meaning->channels =
+ g_slist_append(NULL, ch);
+ analog.num_samples = num_samples;
+ analog.data = (devc->a_data_bufs[i]) + offset;
+ fptr = analog.data;
+ sr_spew
+ ("send analog num %d offset %d first %f 2 %f",
+ num_samples, offset, *(devc->a_data_bufs[i]),
+ *fptr);
+ analog.meaning->mq = SR_MQ_VOLTAGE;
+ analog.meaning->unit = SR_UNIT_VOLT;
+ analog.meaning->mqflags = 0;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ sr_session_send(sdi, &packet);
+ g_slist_free(analog.meaning->channels);
+ }/* if enabled */
+ }/* for channels */
+ return 0;
+
+}
+
+/*Send the ring buffer of pre-trigger analog samples.
+ The entire buffer is sent (as long as it filled once), but need send two payloads split at the
+ the writeptr */
+int send_analog_ring(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_samples)
+{
+ struct sr_datafeed_packet packet;
+ struct sr_datafeed_analog analog;
+ struct sr_analog_encoding encoding;
+ struct sr_analog_meaning meaning;
+ struct sr_analog_spec spec;
+ struct sr_channel *ch;
+ int i;
+ uint32_t num_pre, start_pre;
+ uint32_t num_post, start_post;
+ num_pre =
+ (num_samples >=
+ devc->pretrig_wr_ptr) ? devc->pretrig_wr_ptr : num_samples;
+ start_pre = devc->pretrig_wr_ptr - num_pre;
+ num_post = num_samples - num_pre;
+ start_post = devc->pretrig_entries - num_post;
+ sr_spew
+ ("send_analog ring wrptr %u ns %d npre %u spre %u npost %u spost %u",
+ devc->pretrig_wr_ptr, num_samples, num_pre, start_pre,
+ num_post, start_post);
+ float *fptr;
+ sr_analog_init(&analog, &encoding, &meaning, &spec, ANALOG_DIGITS);
+ for (i = 0; i < devc->num_a_channels; i++) {
+ if ((devc->a_chan_mask >> i) & 1) {
+ ch = devc->analog_groups[i]->channels->data;
+ analog.meaning->channels =
+ g_slist_append(NULL, ch);
+ analog.meaning->mq = SR_MQ_VOLTAGE;
+ analog.meaning->unit = SR_UNIT_VOLT;
+ analog.meaning->mqflags = 0;
+ packet.type = SR_DF_ANALOG;
+ packet.payload = &analog;
+ /*First send what is after the write pointer because it is oldest */
+ if (num_post) {
+ analog.num_samples = num_post;
+ analog.data =
+ (devc->a_pretrig_bufs[i]) + start_post;
+ for (uint32_t j = 0;
+ j < analog.num_samples; j++) {
+ fptr =
+ analog.data +
+ (j * sizeof(float));
+ }
+ sr_session_send(sdi, &packet);
+ }
+ if (num_pre) {
+ analog.num_samples = num_pre;
+ analog.data =
+ (devc->a_pretrig_bufs[i]) + start_pre;
+ sr_dbg("Sending A%d ring buffer newest ",
+ i);
+ for (uint32_t j = 0;
+ j < analog.num_samples; j++) {
+ fptr =
+ analog.data +
+ (j * sizeof(float));
+ sr_spew("RNGDCW%d j %d %f %p", i,
+ j, *fptr, (void *) fptr);
+ }
+ sr_session_send(sdi, &packet);
+ }
+ g_slist_free(analog.meaning->channels);
+ sr_dbg("Sending A%d ring buffer done ", i);
+ }/*if enabled */
+ }/* for channels */
+ return 0;
+
+}
+
+/* Given a chunk of slices forward to trigger check or session as appropriate and update state
+ these could be real slices or those generated by rles */
+int process_group(struct sr_dev_inst *sdi, struct dev_context *devc,
+ uint32_t num_slices)
+{
+ int trigger_offset;
+ int pre_trigger_samples;
+ /* These are samples sent to session and are less than num_slices if we reach limit_samples */
+ size_t num_samples;
+ struct sr_datafeed_logic logic;
+ struct sr_datafeed_packet packet;
+ int i;
+ size_t cbuf_wrptr_cpy;
+ cbuf_wrptr_cpy = devc->cbuf_wrptr;
+ /*regardless of whether we forward samples on or not (because we aren't triggered), always reset the
+ pointer into the device data buffers */
+ devc->cbuf_wrptr = 0;
+ if (devc->trigger_fired) { /*send directly to session */
+ if (devc->limit_samples &&
+ num_slices >
+ devc->limit_samples - devc->sent_samples) {
+ num_samples =
+ devc->limit_samples - devc->sent_samples;
+ } else {
+ num_samples = num_slices;
+ }
+ if (num_samples > 0) {
+ sr_spew("Process_group sending %lu post trig samples dsb %d",
+ num_samples, devc->dig_sample_bytes);
+ if (devc->num_d_channels) {
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ /* The number of bytes required to fit all of the channels */
+ logic.unitsize = devc->dig_sample_bytes;
+ /* The total length of the array sent */
+ logic.length = num_samples * logic.unitsize;
+ logic.data = devc->d_data_buf;
+ sr_session_send(sdi, &packet);
+ }
+ send_analog(sdi, devc, num_samples, 0);
+ }
+
+ devc->sent_samples += num_samples;
+ return 0;
+
+ } else {
+ /* Trigger_fired */
+ size_t num_ring_samples;
+ size_t sptr, eptr;
+ size_t numtail, numwrap;
+ size_t srcptr;
+ /* The trigger_offset is -1 if no trigger is found, but if a trigger is
+ * found then trigger_offset is the offset into the data buffer sent to
+ * it. The pre_trigger_samples is the total number of samples before
+ * the trigger, but limited to the size of the ring buffer set by the
+ * capture_ratio. So the pre_trigger_samples can include both the new
+ * samples and the ring buffer, but trigger_offset is only in relation
+ * to the new samples */
+ trigger_offset = soft_trigger_logic_check(devc->stl, devc->d_data_buf,
+ num_slices * devc->dig_sample_bytes, &pre_trigger_samples);
+
+ /* A trigger offset >=0 indicates a trigger was seen. The stl will issue
+ * the trigger to the session and will forward all pre trigger logic
+ * samples, but we must send any post trigger logic and all pre and post
+ * trigger analog signals */
+ if (trigger_offset > -1) {
+ devc->trigger_fired = TRUE;
+ devc->sent_samples += pre_trigger_samples;
+ packet.type = SR_DF_LOGIC;
+ packet.payload = &logic;
+ num_samples = num_slices - trigger_offset;
+
+ /* Since we are in continuous mode for SW triggers it is possible to
+ * get more samples than limit_samples, so once the trigger fires,
+ * make sure we don't get beyond limit samples. At this point
+ * sent_samples should be equal to pre_trigger_samples (just added
+ * above) because without being triggered we'd never increment
+ * sent_samples.
+ * This number is the number of post trigger logic samples to send
+ * to the session, the number of floats is larger because of the
+ * analog ring buffer we track. */
+ if (devc->limit_samples && \
+ (num_samples > devc->limit_samples - devc->sent_samples))
+ num_samples = devc->limit_samples - devc->sent_samples;
+
+ /* The soft trigger logic issues the trigger and sends packets for
+ * all logic data that was pretrigger so only send what is left */
+ if (num_samples > 0) {
+ sr_dbg("Sending post trigger logical remainder of %lu",
+ num_samples);
+ logic.length = num_samples * devc->dig_sample_bytes;
+ logic.unitsize = devc->dig_sample_bytes;
+ logic.data = devc->d_data_buf +
+ (trigger_offset * devc->dig_sample_bytes);
+ devc->sent_samples += num_samples;
+ sr_session_send(sdi, &packet);
+ }
+
+ size_t new_start, new_end, new_samples, ring_samples;
+ /* Figure out the analog data to send. We might need to send:
+ * -some or all of incoming data
+ * -all of incoming data and some of ring buffer
+ * -all of incoming data and all of ring buffer (and still might be
+ * short)
+ * We don't need to compare to limit_samples because pretrig_entries
+ * can never be more than limit_samples trigger offset indicatese
+ * where in the new samples the trigger was, but we need to go back
+ * pretrig_entries before it */
+ new_start = (trigger_offset > (int)devc->pretrig_entries) ?
+ trigger_offset - devc->pretrig_entries : 0;
+
+ /* Note that we might not have gotten all the pre triggerstore data
+ * we were looking for. In such a case the sw trigger logic seems to
+ * fill up to the limit_samples and thus the ratio is off, but we
+ * get the full number of samples.
+ * The number of entries in the ring buffer is
+ * pre_trigger_samples-trigger_offset so subtract that from limit
+ * samples as a threshold */
+ new_end = MIN(num_slices - 1,
+ devc->limit_samples - (pre_trigger_samples - trigger_offset) - 1);
+
+ /* This includes pre and post trigger storage. */
+ new_samples = new_end - new_start + 1;
+
+ /* pre_trigger_samples can never be greater than trigger_offset by
+ * more than the ring buffer depth (pretrig entries) */
+ ring_samples = (pre_trigger_samples > trigger_offset) ?
+ pre_trigger_samples - trigger_offset : 0;
+ sr_spew("SW trigger float info newstart %zu new_end %zu " \
+ "new_samp %zu ring_samp %zu",
+ new_start, new_end, new_samples, ring_samples);
+
+ if (ring_samples > 0)
+ send_analog_ring(sdi, devc, ring_samples);
+ if (new_samples)
+ send_analog(sdi, devc, new_samples, new_start);
+ } else {
+ /* We didn't trigger but need to copy to ring buffer */
+ if ((devc->a_chan_mask) && (devc->pretrig_entries)) {
+ /*The incoming data buffer could be much larger than the ring
+ * buffer, so never copy more than the size of the ring buffer */
+ num_ring_samples = num_slices > devc->pretrig_entries ?
+ devc->pretrig_entries : num_slices;
+ sptr = devc->pretrig_wr_ptr; /* Starting pointer to copy to */
+
+ /* endptr can't go past the end */
+ eptr = (sptr + num_ring_samples) >= devc-> pretrig_entries ?
+ devc->pretrig_entries - 1 : sptr + num_ring_samples - 1;
+
+ /* Number of samples to copy to the tail of ring buffer without
+ * wrapping */
+ numtail = (eptr - sptr) + 1;
+
+ numwrap = (num_ring_samples > numtail) ?
+ num_ring_samples - numtail : 0;
+
+ /* cbuf_wrptr points to where the next write should go,
+ * not the actual write data */
+ srcptr = cbuf_wrptr_cpy - num_ring_samples;
+ sr_spew("RNG num %zu sptr %zu eptr %zu ",
+ num_ring_samples, sptr, eptr);
+
+ /* Copy tail */
+ for (i = 0; i < devc->num_a_channels; i++)
+ if ((devc->a_chan_mask >> i) & 1)
+ for (uint32_t j = 0; j < numtail; j++)
+ devc->a_pretrig_bufs[i][sptr + j] =
+ devc->a_data_bufs[i][srcptr + j];
+
+ /* Copy wrap */
+ srcptr += numtail;
+ for (i = 0; i < devc->num_a_channels; i++)
+ if ((devc->a_chan_mask >> i) & 1)
+ for (uint32_t j = 0; j < numwrap; j++)
+ devc->a_pretrig_bufs[i][j] =
+ devc->a_data_bufs[i][srcptr + j];
+
+ devc->pretrig_wr_ptr = (numwrap) ?
+ numwrap : (eptr + 1) % devc->pretrig_entries;
+ }
+ }
+ }
+
+ return 0;
}
-//This callback function is mapped from api.c with serial_source_add and is created after a capture
-//has been setup and is responsible for querying the device trigger status, downloading data
-//and forwarding packets
+/* Duplicate previous sample values
+ * This function relies on the caller to ensure d_data_buf has samples to handle
+ * the full value of the rle */
+void rle_memset(struct dev_context *devc, uint32_t num_slices)
+{
+ uint32_t j, k, didx;
+ sr_spew("rle_memset vals 0x%X, 0x%X, 0x%X slices %d dsb %d",
+ devc->d_last[0], devc->d_last[1], devc->d_last[2],
+ num_slices, devc->dig_sample_bytes);
+
+ /* Even if a channel is disabled, PV expects the same location and size for
+ * the enabled channels as if the channel were enabled. */
+ for (j = 0; j < num_slices; j++) {
+ didx = devc->cbuf_wrptr * devc->dig_sample_bytes;
+ for (k = 0; k < devc->dig_sample_bytes; k++)
+ devc->d_data_buf[didx + k] = devc->d_last[k];
+ /* cbuf_wrptr always counts slices/samples (and not the bytes in the
+ * buffer) regardless of mode */
+ devc->cbuf_wrptr++;
+ }
+}
+
+/* This callback function is mapped from api.c with serial_source_add and is
+ * created after a capture has been setup and is responsible for querying the
+ * device trigger status, downloading data and forwarding packets */
SR_PRIV int raspberrypi_pico_receive(int fd, int revents, void *cb_data)
{
- struct sr_dev_inst *sdi;
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
- uint32_t i;
- int len;
- uint32_t bytes_rem;
- uint32_t residual_bytes;
- (void)fd;
-
- if (!(sdi = cb_data))
- return TRUE;
-
- if (!(devc = sdi->priv))
- return TRUE;
- if(devc->rxstate!=RX_ACTIVE){
- //This condition is normal operation and expected to happen
- //but printed as information
- sr_dbg("Reached non active state in receive %d",devc->rxstate);
- //don't return - we may be waiting for a final bytecnt
- //return TRUE;
- }
- if(devc->rxstate==RX_IDLE){
- //This is the normal end condition where we do one more receive
- //to make sure we get the full byte_cnt
- sr_dbg("Reached idle state in receive %d",devc->rxstate);
- return FALSE;
- }
-
- serial = sdi->conn;
- //return true if it is some kind of event we don't handle
- if (!(revents == G_IO_IN || revents == 0))
- return TRUE;
- //Fill the buffer, note the end may have partial slices
- bytes_rem=devc->serial_buffer_size - devc->wrptr;
- //Read one byte less so that we can null it and print as a string
- //Do a small 10ms timeout, if we get nothing, we'll always come back again
- len=serial_read_blocking(serial, &(devc->buffer[devc->wrptr]), bytes_rem-1,10);
- sr_spew("Entry wrptr %u bytes_rem %u len %d",devc->wrptr,bytes_rem,len);
-
- if(len>0){
- devc->buffer[devc->wrptr+len]=0;
- //Add the "#" so that spaces are clearly seen
- sr_dbg("rx string %s#",devc->buffer);
- //This is not guaranteed to be a dataloss condition, but definitely indicates we are
- //processing data right at the incoming rate.
- //With the addition of the byte_cnt sent at the end we will detect any dataloss conditions
- //and thus this is disabled
- //if(len>=(int)bytes_rem-8){
- // sr_err("ERROR: Serial buffer near or at max depth, data from device may have been lost");
- //}
- devc->bytes_avail=(devc->wrptr+len);
- sr_spew("rx len %d bytes_avail %ul sent_samples %ul wrptr %u",len,devc->bytes_avail,devc->sent_samples,devc->wrptr);
- //sr_err("rx len %d ",len);
- }else if (len==0){
- return TRUE;
- }else {
- sr_err("ERROR:Negative serial read code %d",len);
- sdi->driver->dev_acquisition_stop(sdi);
- return FALSE;
- }//len>0
- //This can be used as a bit bucket to drop all samples to see how host processing time effects
- //the devices ability to send data. Obviously no data will be forwarded to the session so it will hang
- // return TRUE;
-
- //Process the serial read data
- devc->ser_rdptr=0;
- if(devc->rxstate==RX_ACTIVE){
- if((devc->a_chan_mask==0)&&((devc->d_chan_mask&0xFFFFFFF0)==0)){
- process_D4(sdi,devc);
- }else{
- process_slice(sdi,devc);
- }
- }
- //process_slice/process_D4 increment ser_rdptr as bytes of the serial buffer are used
- //But they may not use all of it, and thus the residual unused bytes are shifted to the start of the buffer
- //for the next call.
- residual_bytes=devc->bytes_avail - devc->ser_rdptr;
- //sr_spew("Residuals resid %d avail %d rdptr %d wrptr %d\n",residual_bytes,devc->bytes_avail,devc->ser_rdptr,devc->wrptr);
- if(residual_bytes){
- for(i=0;i<residual_bytes;i++){
- devc->buffer[i]=devc->buffer[i+devc->ser_rdptr];
- }
- devc->ser_rdptr=0;
- devc->wrptr=residual_bytes;
- sr_spew("Residual shift rdptr %u wrptr %u",devc->ser_rdptr,devc->wrptr);
- }else{
- //If there are no residuals shifted then zero the wrptr since all data is used
- devc->wrptr=0;
- }
- //ABORT ends immediately
- if(devc->rxstate==RX_ABORT){
- sr_err("Ending receive on abort");
- sdi->driver->dev_acquisition_stop(sdi);
- return FALSE;//
- }
- //if stopped look for final '+' indicating the full byte_cnt is received
- if(devc->rxstate==RX_STOPPED){
- sr_dbg("Stopped, checking byte_cnt");
- if(devc->buffer[0]!='$'){
- //If this happens it means that we got a set of data that was not processed as
- //whole groups of slice bytes. So either we lost data or are not parsing it correctly.
- sr_err("ERROR: Stop marker should be byte zero");
- devc->rxstate=RX_ABORT;
- sdi->driver->dev_acquisition_stop(sdi);
- return FALSE;
- }
- for(i=1;i<devc->wrptr;i++){
- if(devc->buffer[i]=='+'){
- devc->buffer[i]=0;
- uint64_t rxbytecnt;
- rxbytecnt=atol(&(devc->buffer[1]));
- sr_dbg("Byte_cnt check device cnt %llu host cnt %llu",rxbytecnt,devc->byte_cnt);
- if(rxbytecnt!=devc->byte_cnt){
- sr_err("ERROR: received %llu and counted %llu bytecnts don't match, data may be lost",rxbytecnt,devc->byte_cnt);
- }
- //Since we got the bytecnt we know the device is done sending data
- devc->rxstate=RX_IDLE;
- //We must always call acquisition_stop on all completed runs
- sdi->driver->dev_acquisition_stop(sdi);
- return TRUE;
- }
- }
- //It's possible we need one more serial transfer to get the byte_cnt, so print that here
- sr_dbg("Haven't seen byte_cnt + yet");
- }//RX_STOPPED
- //If at the sample limit, send a "+" in case we are in continuous mode and need
- //to stop the device. Not that even in non continous mode there might be cases where get an extra
- //sample or two...
-
- if((devc->sent_samples>=devc->limit_samples)&&(devc->rxstate==RX_ACTIVE)){
- sr_dbg("Ending: sent %u of limit %llu samples byte_cnt %llu",
- devc->sent_samples,devc->limit_samples,devc->byte_cnt);
- send_serial_char(serial,'+');
-
- }
- sr_spew("Receive function done: sent %u limit %llu wrptr %u len %d",devc->sent_samples,devc->limit_samples,devc->wrptr,len);
- return TRUE;
-}//raspberrypi_pico_receive
-
-//Read device specific information from the device
+ struct sr_dev_inst *sdi;
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ int len;
+ uint32_t i, bytes_rem, residual_bytes;
+ (void) fd;
+
+ if (!(sdi = cb_data))
+ return TRUE;
+
+ if (!(devc = sdi->priv))
+ return TRUE;
+
+ if (devc->rxstate != RX_ACTIVE) {
+ /* This condition is normal operation and expected to happen
+ * but printed as information */
+ sr_dbg("Reached non active state in receive %d", devc->rxstate);
+ /* Don't return - we may be waiting for a final bytecnt */
+ }
+
+ if (devc->rxstate == RX_IDLE) {
+ /* This is the normal end condition where we do one more receive
+ * to make sure we get the full byte_cnt */
+ sr_dbg("Reached idle state in receive %d", devc->rxstate);
+ return FALSE;
+ }
+
+ serial = sdi->conn;
+
+ /* Return true if it is some kind of event we don't handle */
+ if (!(revents == G_IO_IN || revents == 0))
+ return TRUE;
+
+ /* Fill the buffer, note the end may have partial slices */
+ bytes_rem = devc->serial_buffer_size - devc->wrptr;
+
+ /* Read one byte less so that we can null it and print as a string. Do a
+ * small 10ms timeout, if we get nothing, we'll always come back again */
+ len = serial_read_blocking(serial, &(devc->buffer[devc->wrptr]),
+ bytes_rem - 1, 10);
+ sr_spew("Entry wrptr %u bytes_rem %u len %d", devc->wrptr, bytes_rem, len);
+
+ if (len > 0) {
+ devc->buffer[devc->wrptr + len] = 0;
+ /* Add the "#" so that spaces in the string are clearly seen */
+ sr_dbg("rx string %s#", devc->buffer);
+ devc->bytes_avail = (devc->wrptr + len);
+ sr_spew("rx len %d bytes_avail %ul sent_samples %ul wrptr %u",
+ len, devc->bytes_avail, devc->sent_samples, devc->wrptr);
+ } else {
+ if (len == 0) {
+ return TRUE;
+ } else {
+ sr_err("ERROR: Negative serial read code %d", len);
+ sdi->driver->dev_acquisition_stop(sdi);
+ return FALSE;
+ }
+ }
+
+ /* Process the serial read data */
+ devc->ser_rdptr = 0;
+ if (devc->rxstate == RX_ACTIVE) {
+ if ((devc->a_chan_mask == 0) \
+ && ((devc->d_chan_mask & 0xFFFFFFF0) == 0))
+ process_D4(sdi, devc);
+ else
+ process_slice(sdi, devc);
+ }
+
+ /* process_slice/process_D4 increment ser_rdptr as bytes of the serial
+ * buffer are used. But they may not use all of it, and thus the residual
+ * unused bytes are shifted to the start of the buffer for the next call. */
+ residual_bytes = devc->bytes_avail - devc->ser_rdptr;
+ if (residual_bytes) {
+ for (i = 0; i < residual_bytes; i++)
+ devc->buffer[i] = devc->buffer[i + devc->ser_rdptr];
+
+ devc->ser_rdptr = 0;
+ devc->wrptr = residual_bytes;
+ sr_spew("Residual shift rdptr %u wrptr %u", devc->ser_rdptr, devc->wrptr);
+ } else {
+ /* If there are no residuals shifted then zero the wrptr since all data
+ * is used */
+ devc->wrptr = 0;
+ }
+
+ /* ABORT ends immediately */
+ if (devc->rxstate == RX_ABORT) {
+ sr_err("Ending receive on abort");
+ sdi->driver->dev_acquisition_stop(sdi);
+ return FALSE;
+ }
+
+ /* If stopped, look for final '+' indicating the full byte_cnt is received */
+ if (devc->rxstate == RX_STOPPED) {
+ sr_dbg("Stopped, checking byte_cnt");
+ if (devc->buffer[0] != '$') {
+ /* If this happens it means that we got a set of data that was not
+ * processed as whole groups of slice bytes. So either we lost data
+ * or are not parsing it correctly. */
+ sr_err("ERROR: Stop marker should be byte zero");
+ devc->rxstate = RX_ABORT;
+ sdi->driver->dev_acquisition_stop(sdi);
+ return FALSE;
+ }
+
+ for (i = 1; i < devc->wrptr; i++) {
+ if (devc->buffer[i] == '+') {
+ devc->buffer[i] = 0;
+ uint64_t rxbytecnt;
+ rxbytecnt = atol((char*)&(devc->buffer[1]));
+ sr_dbg("Byte_cnt check device cnt %lu host cnt %lu",
+ rxbytecnt, devc->byte_cnt);
+ if (rxbytecnt != devc->byte_cnt)
+ sr_err("ERROR: received %lu and counted %lu bytecnts " \
+ "don't match, data may be lost",
+ rxbytecnt, devc->byte_cnt);
+
+ /* Since we got the bytecnt we know the device is done
+ * sending data */
+ devc->rxstate = RX_IDLE;
+
+ /* We must always call acquisition_stop on all completed runs */
+ sdi->driver->dev_acquisition_stop(sdi);
+ return TRUE;
+ }
+ }
+
+ /*It's possible we need one more serial transfer to get the byte_cnt,
+ * so print that here */
+ sr_dbg("Haven't seen byte_cnt + yet");
+ }
+ /* If at the sample limit, send a "+" in case we are in continuous mode and
+ * need to stop the device. Not that even in non continous mode there might
+ * be cases where get an extra sample or two... */
+
+ if ((devc->sent_samples >= devc->limit_samples) \
+ && (devc->rxstate == RX_ACTIVE)) {
+ sr_dbg("Ending: sent %u of limit %lu samples byte_cnt %lu",
+ devc->sent_samples, devc->limit_samples, devc->byte_cnt);
+ send_serial_char(serial, '+');
+ }
+
+ sr_spew("Receive function done: sent %u limit %lu wrptr %u len %d",
+ devc->sent_samples, devc->limit_samples, devc->wrptr, len);
+
+ return TRUE;
+}
+
+/* Read device specific information from the device */
SR_PRIV int raspberrypi_pico_get_dev_cfg(const struct sr_dev_inst *sdi)
{
- struct dev_context *devc;
- struct sr_serial_dev_inst *serial;
- char *cmd, response[20];
- gchar **tokens;
- unsigned int i;
- int ret,num_tokens;
-
- devc = sdi->priv;
- sr_dbg("At get_dev_cfg");
- serial = sdi->conn;
- for(i=0;i<devc->num_a_channels;i++){
- cmd = g_strdup_printf("a%d\n",i);
- ret = send_serial_w_resp(serial,cmd,response,20);
- if(ret<=0){
- sr_err("ERROR:No response from device for analog channel query");
- return SR_ERR;
- }
- //null end of string for strsplit
- response[ret]=0;
- tokens=NULL;
- tokens = g_strsplit(response, "x", 0);
- num_tokens = g_strv_length(tokens);
- if (num_tokens == 2) {
- devc->a_scale[i]=((float)atoi(tokens[0]))/1000000.0;
- devc->a_offset[i]=((float)atoi(tokens[1]))/1000000.0;
- sr_dbg("A%d scale %f offset %f response #%s# tokens #%s# #%s#\n",i,devc->a_scale[i],devc->a_offset[i],response,tokens[0],tokens[1]);
- }else{
- sr_err("ERROR:Ascale read c%d got unparseable response %s tokens %d",i,response,num_tokens);
- //force a legal fixed value assuming a 3.3V scale
- //a failue in parsing the scale
- devc->a_scale[i]=0.0257;
- devc->a_offset[i]=0.0;
- }
- g_strfreev(tokens);
- g_free(cmd);
- }
+ struct dev_context *devc;
+ struct sr_serial_dev_inst *serial;
+ char *cmd, response[20];
+ gchar **tokens;
+ unsigned int i;
+ int ret, num_tokens;
+ devc = sdi->priv;
+ sr_dbg("At get_dev_cfg");
+ serial = sdi->conn;
+ for (i = 0; i < devc->num_a_channels; i++) {
+ cmd = g_strdup_printf("a%d\n", i);
+ ret = send_serial_w_resp(serial, cmd, response, 20);
+ if (ret <= 0) {
+ sr_err("ERROR: No response from device for analog channel query");
+ return SR_ERR;
+ }
+ response[ret] = 0;
+ tokens = NULL;
+ tokens = g_strsplit(response, "x", 0);
+ num_tokens = g_strv_length(tokens);
- return SR_OK;
+ if (num_tokens == 2) {
+ devc->a_scale[i] = ((float) atoi(tokens[0])) / 1000000.0;
+ devc->a_offset[i] = ((float) atoi(tokens[1])) / 1000000.0;
+ sr_dbg("A%d scale %f offset %f response #%s# tokens #%s# #%s#",
+ i, devc->a_scale[i], devc->a_offset[i],
+ response, tokens[0], tokens[1]);
+ } else {
+ sr_err("ERROR: Ascale read c%d got unparseable response %s tokens %d",
+ i, response, num_tokens);
+ /* Force a legal fixed value assuming a 3.3V scale */
+ devc->a_scale[i] = 0.0257;
+ devc->a_offset[i] = 0.0;
+ }
-}
+ g_strfreev(tokens);
+ g_free(cmd);
+ }
+ return SR_OK;
+}
projects / libsigrok.git / blobdiff