*/
#include <glib.h>
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-#include "config.h"
-#include "protocol.h"
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <errno.h>
+#include "libsigrok.h"
+#include "libsigrok-internal.h"
+#include "protocol.h"
+/* User-defined FS9721_LP3 flag 'c2c1_10' means temperature on this DMM. */
+#define is_temperature info.is_c2c1_10
-static gboolean lcd14_is_sync_valid(const lcd14_packet *packet)
-{
- size_t i;
- /* Check the syncronization nibbles, and make sure they all match */
- for(i = 0; i < LCD14_PACKET_SIZE; i++)
- {
- uint8_t sync = (packet->raw[i] & LCD14_SYNC_MASK) >> 4;
- if(sync != (i+1) )
- return FALSE;
- }
- return TRUE;
-}
-
-static gboolean lcd14_is_selection_good(const lcd14_data *data)
-{
- int n_postfix = 0;
- int n_type = 0;
- /* Does the packet have more than one multiplier ? */
- if(data->flags & LCD14_NANO)
- n_postfix++;
- if(data->flags & LCD14_MICRO)
- n_postfix++;
- if(data->flags & LCD14_MILLI)
- n_postfix++;
- if(data->flags & LCD14_KILO)
- n_postfix++;
- if(data->flags & LCD14_MEGA)
- n_postfix++;
-
- if(n_postfix > 1)
- return FALSE;
-
- /* Does the packet "measure" more than one type of value ?*/
- if(data->flags & LCD14_HZ)
- n_type++;
- if(data->flags & LCD14_OHM)
- n_type++;
- if(data->flags & LCD14_FARAD)
- n_type++;
- if(data->flags & LCD14_AMP)
- n_type++;
- if(data->flags & LCD14_VOLT)
- n_type++;
- if(data->flags & LCD14_DUTY)
- n_type++;
- if(data->flags & LCD14_CELSIUS)
- n_type++;
- /* Do not test for hFE. hFE is not implemented and always '1' */
- if(n_type > 1)
- return FALSE;
-
- /* Both AC and DC ? */
- if( (data->flags & LCD14_AC) && (data->flags & LCD14_DC) )
- return FALSE;
-
- /* OK, no duplicates */
- return TRUE;
-}
-
-/* We "cook" a raw lcd14_pcaket into a more pallatable form, lcd14_data */
-static void lcd14_cook_raw(const lcd14_packet *packet, lcd14_data * data)
-{
- size_t i;
-
- /* Get the digits out */
- for(i = 0; i < 4; i++)
- {
- size_t j = (i << 1) + 1;
- data->digit[i] = ( (packet->raw[j] & ~LCD14_SYNC_MASK) << 4 ) |
- ( (packet->raw[j+1] & ~LCD14_SYNC_MASK) );
- }
-
- /* Now extract the flags */
- data->flags = ( (packet->raw[0] & ~LCD14_SYNC_MASK) << 20) |
- ( (packet->raw[9] & ~LCD14_SYNC_MASK) << 16) |
- ( (packet->raw[10]& ~LCD14_SYNC_MASK) << 12) |
- ( (packet->raw[11]& ~LCD14_SYNC_MASK) << 8) |
- ( (packet->raw[12]& ~LCD14_SYNC_MASK) << 4) |
- ( (packet->raw[13]& ~LCD14_SYNC_MASK) );
-}
-
-
-/* Since the DMM does not identify itslef in any way shape, or form, we really
- * don't know for sure who is sending the data. We must use every possible
- * check to filter out bad packets, especially since detection mechanism depends
- * on how well we can filter out bad packets packets */
-SR_PRIV gboolean lcd14_is_packet_valid(const lcd14_packet *packet,
- lcd14_data *data)
-{
- /* Callers not interested in the data, pass NULL */
- lcd14_data placeholder;
- if(data == NULL)
- data = &placeholder;
- /* We start with our syncronization nibbles, then move to more advanced
- * checks */
- if(!lcd14_is_sync_valid(packet))
- return FALSE;
-
- lcd14_cook_raw(packet, data);
-
- if(!lcd14_is_selection_good(data))
- return FALSE;
-
- /* Made it here, huh? Then this looks to be a valid packet */
- return TRUE;
-}
-
-static uint8_t lcd14_to_digit(uint8_t raw_digit)
-{
- /* Take out the decimal point, so we can use a simple switch() */
- raw_digit &= ~LCD14_DP_MASK;
- switch(raw_digit)
- {
- case 0x00:
- case LCD14_LCD_0:
- return 0;
- case LCD14_LCD_1:
- return 1;
- case LCD14_LCD_2:
- return 2;
- case LCD14_LCD_3:
- return 3;
- case LCD14_LCD_4:
- return 4;
- case LCD14_LCD_5:
- return 5;
- case LCD14_LCD_6:
- return 6;
- case LCD14_LCD_7:
- return 7;
- case LCD14_LCD_8:
- return 8;
- case LCD14_LCD_9:
- return 9;
- default:
- return LCD14_LCD_INVALID;
- }
-}
-
-static double lcdraw_to_double(lcd14_data *data)
-{
- /* *********************************************************************
- * Get a raw floating point value from the data
- **********************************************************************/
- double rawval;
- double multiplier = 1;
- uint8_t digit;
- gboolean dp_reached = FALSE;
- int i;
-
- /* We have 4 digits, and we start from the most significant */
- for(i = 0; i < 4; i++)
- {
- uint8_t raw_digit = data->digit[i];
- digit = lcd14_to_digit(raw_digit);
- if(digit == LCD14_LCD_INVALID) {
- rawval = NAN;
- break;
- }
- /* Digit 1 does not have a decimal point. Instead, the decimal
- * point is used to indicate MAX, so we must avoid testing it */
- if( (i > 0) && (raw_digit & LCD14_DP_MASK) )
- dp_reached = TRUE;
- if(dp_reached) multiplier /= 10;
- rawval = rawval * 10 + digit;
- }
- rawval *= multiplier;
- if(data->digit[0] & LCD14_D0_NEG)
- rawval *= -1;
-
- /* See if we need to multiply our raw value by anything */
- if(data->flags & LCD14_NANO) {
- rawval *= 1E-9;
- } else if(data->flags & LCD14_MICRO) {
- rawval *= 1E-6;
- } else if(data->flags & LCD14_MILLI) {
- rawval *= 1E-3;
- } else if(data->flags & LCD14_KILO) {
- rawval *= 1E3;
- } else if(data->flags & LCD14_MEGA) {
- rawval *= 1E6;
- }
-
- return rawval;
-}
-
-static void lcd14_handle_packet(lcd14_data *data, struct dev_context *devc)
+/* Now see what the value means, and pass that on. */
+static void fs9721_serial_handle_packet(const uint8_t *buf,
+ struct dev_context *devc)
{
- double rawval = lcdraw_to_double(data);
- /* *********************************************************************
- * Now see what the value means, and pass that on
- **********************************************************************/
+ float floatval;
struct sr_datafeed_packet packet;
struct sr_datafeed_analog *analog;
+ struct fs9721_info info;
- if( !(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog))) ) {
- sr_err("failed to malloc packet");
+ if (!(analog = g_try_malloc0(sizeof(struct sr_datafeed_analog)))) {
+ sr_err("Analog packet malloc failed.");
return;
}
- analog->num_samples = 1;
- if( !(analog->data = g_try_malloc(sizeof(float))) ) {
- sr_err("failed to malloc data");
+
+ if (!(analog->data = g_try_malloc(sizeof(float)))) {
+ sr_err("Analog value malloc failed.");
g_free(analog);
return;
}
- *analog->data = (float)rawval;
+
+ analog->num_samples = 1;
analog->mq = -1;
- /* What does the data mean ? */
- if(data->flags & LCD14_VOLT) {
- analog->mq = SR_MQ_VOLTAGE;
- analog->unit = SR_UNIT_VOLT;
- if(data->flags & LCD14_AC)
- analog->mqflags |= SR_MQFLAG_AC;
- else
- analog->mqflags |= SR_MQFLAG_DC;
- }
- else if(data->flags & LCD14_AMP) {
- analog->mq = SR_MQ_CURRENT;
- analog->unit = SR_UNIT_AMPERE;
- if(data->flags & LCD14_AC)
- analog->mqflags |= SR_MQFLAG_AC;
- else
- analog->mqflags |= SR_MQFLAG_DC;
- }
- else if(data->flags & LCD14_OHM) {
- if(data->flags & LCD14_BEEP)
- analog->mq = SR_MQ_CONTINUITY;
- else
- analog->mq = SR_MQ_RESISTANCE;
- if(!isnan(rawval) )
- analog->unit = SR_UNIT_OHM;
- else {
- analog->unit = SR_UNIT_BOOLEAN;
- *analog->data = FALSE;
- }
- }
- else if(data->flags & LCD14_FARAD) {
- analog->mq = SR_MQ_CAPACITANCE;
- analog->unit = SR_UNIT_FARAD;
- }
- else if(data->flags & LCD14_CELSIUS) {
+ sr_fs9721_parse(buf, &floatval, analog, &info);
+ *analog->data = floatval;
+
+ if (is_temperature) {
analog->mq = SR_MQ_TEMPERATURE;
- /* No Kelvin or Fahrenheit from the deive, just Celsius */
+ /* No Kelvin or Fahrenheit from the device, just Celsius. */
analog->unit = SR_UNIT_CELSIUS;
}
- else if(data->flags & LCD14_HZ) {
- analog->mq = SR_MQ_FREQUENCY;
- analog->unit = SR_UNIT_HERTZ;
- }
- else if(data->flags & LCD14_DUTY) {
- analog->mq = SR_MQ_DUTY_CYCLE;
- analog->unit = SR_UNIT_PERCENTAGE;
- }
- else if(data->flags & LCD14_HFE) {
- analog->mq = SR_MQ_GAIN;
- analog->unit = SR_UNIT_UNITLESS;
- }
- else if(data->flags & LCD14_DIODE) {
- analog->mq = SR_MQ_VOLTAGE;
- analog->unit = SR_UNIT_VOLT;
- analog->mqflags |= SR_MQFLAG_DIODE | SR_MQFLAG_DC;
- }
- else {
- sr_warn("unable to identify measurement mode");
- }
-
- /* What other flags are associated with the data? */
- if(data->flags & LCD14_HOLD) {
- analog->mqflags |= SR_MQFLAG_HOLD;
- }
- if(data->flags & LCD14_AUTO) {
- analog->mqflags |= SR_MQFLAG_AUTORANGE;
- }
- if(data->flags & LCD14_REL) {
- analog->mqflags |= SR_MQFLAG_RELATIVE;
- }
if (analog->mq != -1) {
/* Got a measurement. */
- sr_spew("val %f", rawval);
packet.type = SR_DF_ANALOG;
packet.payload = analog;
sr_session_send(devc->cb_data, &packet);
devc->num_samples++;
}
+
g_free(analog->data);
g_free(analog);
}
static void handle_new_data(struct dev_context *devc, int fd)
{
- int len;
- size_t i;
- size_t offset = 0;
- /* Try to get as much data as the buffer can hold */
+ int len, i, offset = 0;
+
+ /* Try to get as much data as the buffer can hold. */
len = DMM_BUFSIZE - devc->buflen;
len = serial_read(fd, devc->buf + devc->buflen, len);
if (len < 1) {
- sr_err("serial port read error!");
+ sr_err("Serial port read error: %d.", len);
return;
}
devc->buflen += len;
- /* Now look for packets in that data */
- while((devc->buflen - offset) >= LCD14_PACKET_SIZE)
- {
- lcd14_packet * packet = (void *)(devc->buf + offset);
- lcd14_data data;
- if( lcd14_is_packet_valid(packet, &data) )
- {
- lcd14_handle_packet(&data, devc);
- offset += LCD14_PACKET_SIZE;
+ /* Now look for packets in that data. */
+ while ((devc->buflen - offset) >= FS9721_PACKET_SIZE) {
+ if (sr_fs9721_packet_valid(devc->buf + offset)) {
+ fs9721_serial_handle_packet(devc->buf + offset, devc);
+ offset += FS9721_PACKET_SIZE;
} else {
offset++;
}
}
- /* If we have any data left, move it to the beginning of our buffer */
- for(i = 0; i < devc->buflen - offset; i++)
+ /* If we have any data left, move it to the beginning of our buffer. */
+ for (i = 0; i < devc->buflen - offset; i++)
devc->buf[i] = devc->buf[offset + i];
devc->buflen -= offset;
}
-SR_PRIV int lcd14_receive_data(int fd, int revents, void *cb_data)
+SR_PRIV int tekpower_dmm_receive_data(int fd, int revents, void *cb_data)
{
const struct sr_dev_inst *sdi;
struct dev_context *devc;
if (!(devc = sdi->priv))
return TRUE;
- if (revents == G_IO_IN)
- {
+ if (revents == G_IO_IN) {
/* Serial data arrived. */
handle_new_data(devc, fd);
}
projects / libsigrok.git / blobdiff