*/
#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"
-
-static gboolean lcd14_is_sync_valid(const lcd14_packet *packet)
+static gboolean lcd14_is_sync_valid(const struct 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) )
+ int i;
+ uint8_t sync;
+
+ /* Check the syncronization nibbles, and make sure they all match. */
+ for (i = 0; i < LCD14_PACKET_SIZE; i++) {
+ 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)
+static gboolean lcd14_is_selection_good(const struct lcd14_data *data)
{
- int n_postfix = 0;
- int n_type = 0;
- /* Does the packet have more than one multiplier ? */
- if(data->flags & LCD14_NANO)
+ int n_postfix = 0, n_type = 0;
+
+ /* Does the packet have more than one multiplier? */
+ if (data->flags & LCD14_NANO)
n_postfix++;
- if(data->flags & LCD14_MICRO)
+ if (data->flags & LCD14_MICRO)
n_postfix++;
- if(data->flags & LCD14_MILLI)
+ if (data->flags & LCD14_MILLI)
n_postfix++;
- if(data->flags & LCD14_KILO)
+ if (data->flags & LCD14_KILO)
n_postfix++;
- if(data->flags & LCD14_MEGA)
+ if (data->flags & LCD14_MEGA)
n_postfix++;
- if(n_postfix > 1)
+ if (n_postfix > 1)
return FALSE;
- /* Does the packet "measure" more than one type of value ?*/
- if(data->flags & LCD14_HZ)
+ /* Does the packet "measure" more than one type of value? */
+ if (data->flags & LCD14_HZ)
n_type++;
- if(data->flags & LCD14_OHM)
+ if (data->flags & LCD14_OHM)
n_type++;
- if(data->flags & LCD14_FARAD)
+ if (data->flags & LCD14_FARAD)
n_type++;
- if(data->flags & LCD14_AMP)
+ if (data->flags & LCD14_AMP)
n_type++;
- if(data->flags & LCD14_VOLT)
+ if (data->flags & LCD14_VOLT)
n_type++;
- if(data->flags & LCD14_DUTY)
+ if (data->flags & LCD14_DUTY)
n_type++;
- if(data->flags & LCD14_CELSIUS)
+ if (data->flags & LCD14_CELSIUS)
n_type++;
- /* Do not test for hFE. hFE is not implemented and always '1' */
- if(n_type > 1)
+ /* 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) )
+ /* Both AC and DC? */
+ if ((data->flags & LCD14_AC) && (data->flags & LCD14_DC))
return FALSE;
- /* OK, no duplicates */
+ /* 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)
+/* We "cook" a raw lcd14_pcaket into a more pallatable form, lcd14_data. */
+static void lcd14_cook_raw(const struct lcd14_packet *packet,
+ struct 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) );
+ int i, j;
+
+ /* Get the digits out. */
+ for (i = 0; i < 4; i++) {
+ 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) );
+ /* 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
+/*
+ * Since the DMM does not identify itself 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)
+ * check to filter out bad packets, especially since the detection mechanism
+ * depends on how well we can filter out bad packets packets.
+ */
+SR_PRIV gboolean lcd14_is_packet_valid(const struct lcd14_packet *packet,
+ struct lcd14_data *data)
{
- /* Callers not interested in the data, pass NULL */
- lcd14_data placeholder;
- if(data == NULL)
+ struct lcd14_data placeholder;
+
+ /* Callers not interested in the data, pass NULL. */
+ if (data == NULL)
data = &placeholder;
- /* We start with our syncronization nibbles, then move to more advanced
- * checks */
- if(!lcd14_is_sync_valid(packet))
+
+ if (!lcd14_is_sync_valid(packet))
return FALSE;
lcd14_cook_raw(packet, data);
- if(!lcd14_is_selection_good(data))
+ if (!lcd14_is_selection_good(data))
return FALSE;
- /* Made it here, huh? Then this looks to be a valid packet */
+ /* If we made it here, 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() */
+ /* Take out the decimal point, so we can use a simple switch(). */
raw_digit &= ~LCD14_DP_MASK;
- switch(raw_digit)
- {
+
+ switch (raw_digit) {
case 0x00:
case LCD14_LCD_0:
return 0;
}
}
-static double lcdraw_to_double(lcd14_data *data)
+/* Get a raw floating point value from the data. */
+static double lcdraw_to_double(struct lcd14_data *data)
{
- /* *********************************************************************
- * Get a raw floating point value from the data
- **********************************************************************/
double rawval;
double multiplier = 1;
- uint8_t digit;
+ uint8_t digit, raw_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];
+ /* We have 4 digits, and we start from the most significant. */
+ for (i = 0; i < 4; i++) {
+ raw_digit = data->digit[i];
digit = lcd14_to_digit(raw_digit);
- if(digit == LCD14_LCD_INVALID) {
+ 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) )
+
+ /*
+ * 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;
+ if (dp_reached)
+ multiplier /= 10;
rawval = rawval * 10 + digit;
}
rawval *= multiplier;
- if(data->digit[0] & LCD14_D0_NEG)
+ 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) {
+ /* 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) {
+ else if (data->flags & LCD14_MICRO)
rawval *= 1E-6;
- } else if(data->flags & LCD14_MILLI) {
+ else if (data->flags & LCD14_MILLI)
rawval *= 1E-3;
- } else if(data->flags & LCD14_KILO) {
+ else if (data->flags & LCD14_KILO)
rawval *= 1E3;
- } else if(data->flags & LCD14_MEGA) {
+ 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 lcd14_handle_packet(struct lcd14_data *data,
+ struct dev_context *devc)
{
- double rawval = lcdraw_to_double(data);
- /* *********************************************************************
- * Now see what the value means, and pass that on
- **********************************************************************/
+ double rawval;
struct sr_datafeed_packet packet;
struct sr_datafeed_analog *analog;
- 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("Failed to malloc packet.");
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("Failed to malloc data.");
g_free(analog);
return;
}
+
+ rawval = lcdraw_to_double(data);
+
+ analog->num_samples = 1;
*analog->data = (float)rawval;
+
analog->mq = -1;
- /* What does the data mean ? */
- if(data->flags & LCD14_VOLT) {
+ /* 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)
+ if (data->flags & LCD14_AC)
analog->mqflags |= SR_MQFLAG_AC;
else
analog->mqflags |= SR_MQFLAG_DC;
- }
- else if(data->flags & LCD14_AMP) {
+ } else if (data->flags & LCD14_AMP) {
analog->mq = SR_MQ_CURRENT;
analog->unit = SR_UNIT_AMPERE;
- if(data->flags & LCD14_AC)
+ 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)
+ } 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) )
+ if (!isnan(rawval))
analog->unit = SR_UNIT_OHM;
else {
analog->unit = SR_UNIT_BOOLEAN;
*analog->data = FALSE;
}
- }
- else if(data->flags & LCD14_FARAD) {
+ } else if (data->flags & LCD14_FARAD) {
analog->mq = SR_MQ_CAPACITANCE;
analog->unit = SR_UNIT_FARAD;
- }
- else if(data->flags & LCD14_CELSIUS) {
+ } else if (data->flags & LCD14_CELSIUS) {
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) {
+ } else if (data->flags & LCD14_HZ) {
analog->mq = SR_MQ_FREQUENCY;
analog->unit = SR_UNIT_HERTZ;
- }
- else if(data->flags & LCD14_DUTY) {
+ } else if (data->flags & LCD14_DUTY) {
analog->mq = SR_MQ_DUTY_CYCLE;
analog->unit = SR_UNIT_PERCENTAGE;
- }
- else if(data->flags & LCD14_HFE) {
+ } else if (data->flags & LCD14_HFE) {
analog->mq = SR_MQ_GAIN;
analog->unit = SR_UNIT_UNITLESS;
- }
- else if(data->flags & LCD14_DIODE) {
+ } 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");
+ } else {
+ sr_warn("Unable to identify measurement mode.");
}
/* What other flags are associated with the data? */
- if(data->flags & LCD14_HOLD) {
+ if (data->flags & LCD14_HOLD)
analog->mqflags |= SR_MQFLAG_HOLD;
- }
- if(data->flags & LCD14_AUTO) {
+ if (data->flags & LCD14_AUTO)
analog->mqflags |= SR_MQFLAG_AUTORANGE;
- }
- if(data->flags & LCD14_REL) {
+ if (data->flags & LCD14_REL)
analog->mqflags |= SR_MQFLAG_RELATIVE;
- }
if (analog->mq != -1) {
/* Got a measurement. */
- sr_spew("val %f", rawval);
+ sr_spew("Measurement value is %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;
+ struct lcd14_packet *packet;
+ struct lcd14_data data;
+
+ /* 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) )
- {
+ /* Now look for packets in that data. */
+ while ((devc->buflen - offset) >= LCD14_PACKET_SIZE) {
+ packet = (void *)(devc->buf + offset);
+ if (lcd14_is_packet_valid(packet, &data)) {
lcd14_handle_packet(&data, devc);
offset += LCD14_PACKET_SIZE;
} else {
}
}
- /* 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