/*
* This file is part of the libsigrok project.
*
- * Copyright (C) 2022
AC0BI <ac0bi00@gmail.com>
+ * Copyright (C) 2022
Shawn Walker <ac0bi00@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#define _GNU_SOURCE
+
#include <config.h>
+#include <errno.h>
+#include <glib.h>
+#include <math.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <libsigrok/libsigrok.h>
+#include "libsigrok-internal.h"
#include "protocol.h"
-SR_PRIV int raspberrypi_pico_receive_data(int fd, int revents, void *cb_data)
+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_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);
+ }
+
+}
+//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;
+ //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;
+
+}
+
+//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);
+ }
+ 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]);
+ }
+ }
+}
+
+//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)
{
- const struct sr_dev_inst *sdi;
- struct dev_context *devc;
+ 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;
+ }
- (void)fd;
+ 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 (!(sdi = cb_data))
- return TRUE;
+ 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;
- if (!(devc = sdi->priv))
- 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 (revents == G_IO_IN) {
- /* TODO */
- }
+ 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
+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);
+ }
+
+
+ return SR_OK;
- return TRUE;
}
+
projects / libsigrok.git / blobdiff