#define sr_warn(s, args...) sr_warn(DRIVER_LOG_DOMAIN s, ## args)
#define sr_err(s, args...) sr_err(DRIVER_LOG_DOMAIN s, ## args)
-/**
- * Parse the numerical value from a protocol packet.
- *
- * @param buf Buffer containing the 14-byte protocol packet.
- * @param result Pointer to a float variable. That variable will contain the
- * result value upon parsing success.
- *
- * @return SR_OK upon success, SR_ERR upon failure. Upon errors, the result
- * variable contents are undefined and should not be used.
- */
+static gboolean flags_valid(const struct fs9922_info *info)
+{
+ int count;
+
+ /* Does the packet have more than one multiplier? */
+ count = 0;
+ count += (info->is_nano) ? 1 : 0;
+ count += (info->is_micro) ? 1 : 0;
+ count += (info->is_milli) ? 1 : 0;
+ count += (info->is_kilo) ? 1 : 0;
+ count += (info->is_mega) ? 1 : 0;
+ if (count > 1) {
+ sr_err("More than one multiplier detected in packet.");
+ return FALSE;
+ }
+
+ /* Does the packet "measure" more than one type of value? */
+ count = 0;
+ count += (info->is_diode) ? 1 : 0;
+ count += (info->is_percent) ? 1 : 0;
+ count += (info->is_volt) ? 1 : 0;
+ count += (info->is_ampere) ? 1 : 0;
+ count += (info->is_ohm) ? 1 : 0;
+ count += (info->is_hfe) ? 1 : 0;
+ count += (info->is_hertz) ? 1 : 0;
+ count += (info->is_farad) ? 1 : 0;
+ count += (info->is_celsius) ? 1 : 0;
+ count += (info->is_fahrenheit) ? 1 : 0;
+ if (count > 1) {
+ sr_err("More than one measurement type detected in packet.");
+ return FALSE;
+ }
+
+ /* Both AC and DC set? */
+ if (info->is_ac && info->is_dc) {
+ sr_err("Both AC and DC flags detected in packet.");
+ return FALSE;
+ }
+
+ /* Both Celsius and Fahrenheit set? */
+ if (info->is_celsius && info->is_fahrenheit) {
+ sr_err("Both Celsius and Fahrenheit flags detected in packet.");
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
static int parse_value(const uint8_t *buf, float *result)
{
int sign, intval;
return SR_OK;
}
-/**
- * Parse various flags in a protocol packet.
- *
- * @param buf Buffer containing the 14-byte protocol packet.
- * @param floatval Pointer to a float variable which should contain the value
- * parsed using parse_value(). That variable will be modified
- * in-place depending on the flags in the protocol packet.
- * @param analog Pointer to a struct sr_datafeed_analog. The struct will be
- * filled with the relevant data according to the flags in the
- * protocol packet.
- *
- * @return SR_OK upon success, SR_ERR upon failure. Upon errors, the 'floatval'
- * and 'analog' variable contents are undefined and should not be used.
- */
-static int parse_flags(const uint8_t *buf, float *floatval,
- struct sr_datafeed_analog *analog)
+static void parse_flags(const uint8_t *buf, struct fs9922_info *info)
{
- gboolean is_auto, is_dc, is_ac, is_rel, is_hold, is_bpn, is_z1, is_z2;
- gboolean is_max, is_min, is_apo, is_bat, is_nano, is_z3, is_micro;
- gboolean is_milli, is_kilo, is_mega, is_beep, is_diode, is_percent;
- gboolean is_z4, is_volt, is_ampere, is_ohm, is_hfe, is_hertz, is_farad;
- gboolean is_celsius, is_fahrenheit;
- int bargraph_sign, bargraph_value;
-
/* Z1/Z2/Z3/Z4 are bits for user-defined LCD symbols (on/off). */
/* Byte 7 */
/* Bit 7: Always 0 */
/* Bit 6: Always 0 */
- is_auto = (buf[7] & (1 << 5)) != 0;
- is_dc = (buf[7] & (1 << 4)) != 0;
- is_ac = (buf[7] & (1 << 3)) != 0;
- is_rel = (buf[7] & (1 << 2)) != 0;
- is_hold = (buf[7] & (1 << 1)) != 0;
- is_bpn = (buf[7] & (1 << 0)) != 0; /* Bargraph shown */
+ info->is_auto = (buf[7] & (1 << 5)) != 0;
+ info->is_dc = (buf[7] & (1 << 4)) != 0;
+ info->is_ac = (buf[7] & (1 << 3)) != 0;
+ info->is_rel = (buf[7] & (1 << 2)) != 0;
+ info->is_hold = (buf[7] & (1 << 1)) != 0;
+ info->is_bpn = (buf[7] & (1 << 0)) != 0; /* Bargraph shown */
/* Byte 8 */
- is_z1 = (buf[8] & (1 << 7)) != 0; /* User-defined symbol 1 */
- is_z2 = (buf[8] & (1 << 6)) != 0; /* User-defined symbol 2 */
- is_max = (buf[8] & (1 << 5)) != 0;
- is_min = (buf[8] & (1 << 4)) != 0;
- is_apo = (buf[8] & (1 << 3)) != 0; /* Auto-poweroff active */
- is_bat = (buf[8] & (1 << 2)) != 0; /* Battery low */
- is_nano = (buf[8] & (1 << 1)) != 0;
- is_z3 = (buf[8] & (1 << 0)) != 0; /* User-defined symbol 3 */
+ info->is_z1 = (buf[8] & (1 << 7)) != 0; /* User symbol 1 */
+ info->is_z2 = (buf[8] & (1 << 6)) != 0; /* User symbol 2 */
+ info->is_max = (buf[8] & (1 << 5)) != 0;
+ info->is_min = (buf[8] & (1 << 4)) != 0;
+ info->is_apo = (buf[8] & (1 << 3)) != 0; /* Auto-poweroff on */
+ info->is_bat = (buf[8] & (1 << 2)) != 0; /* Battery low */
+ info->is_nano = (buf[8] & (1 << 1)) != 0;
+ info->is_z3 = (buf[8] & (1 << 0)) != 0; /* User symbol 3 */
/* Byte 9 */
- is_micro = (buf[9] & (1 << 7)) != 0;
- is_milli = (buf[9] & (1 << 6)) != 0;
- is_kilo = (buf[9] & (1 << 5)) != 0;
- is_mega = (buf[9] & (1 << 4)) != 0;
- is_beep = (buf[9] & (1 << 3)) != 0;
- is_diode = (buf[9] & (1 << 2)) != 0;
- is_percent = (buf[9] & (1 << 1)) != 0;
- is_z4 = (buf[8] & (1 << 0)) != 0; /* User-defined symbol 4 */
+ info->is_micro = (buf[9] & (1 << 7)) != 0;
+ info->is_milli = (buf[9] & (1 << 6)) != 0;
+ info->is_kilo = (buf[9] & (1 << 5)) != 0;
+ info->is_mega = (buf[9] & (1 << 4)) != 0;
+ info->is_beep = (buf[9] & (1 << 3)) != 0;
+ info->is_diode = (buf[9] & (1 << 2)) != 0;
+ info->is_percent = (buf[9] & (1 << 1)) != 0;
+ info->is_z4 = (buf[8] & (1 << 0)) != 0; /* User symbol 4 */
/* Byte 10 */
- is_volt = (buf[10] & (1 << 7)) != 0;
- is_ampere = (buf[10] & (1 << 6)) != 0;
- is_ohm = (buf[10] & (1 << 5)) != 0;
- is_hfe = (buf[10] & (1 << 4)) != 0;
- is_hertz = (buf[10] & (1 << 3)) != 0;
- is_farad = (buf[10] & (1 << 2)) != 0;
- is_celsius = (buf[10] & (1 << 1)) != 0; /* Only FS9922-DMM4 */
- is_fahrenheit = (buf[10] & (1 << 0)) != 0; /* Only FS9922-DMM4 */
+ info->is_volt = (buf[10] & (1 << 7)) != 0;
+ info->is_ampere = (buf[10] & (1 << 6)) != 0;
+ info->is_ohm = (buf[10] & (1 << 5)) != 0;
+ info->is_hfe = (buf[10] & (1 << 4)) != 0;
+ info->is_hertz = (buf[10] & (1 << 3)) != 0;
+ info->is_farad = (buf[10] & (1 << 2)) != 0;
+ info->is_celsius = (buf[10] & (1 << 1)) != 0; /* Only FS9922-DMM4 */
+ info->is_fahrenheit = (buf[10] & (1 << 0)) != 0; /* Only FS9922-DMM4 */
/*
* Byte 11: Bar graph
* Upon "over limit" the bargraph value is 1 count above the highest
* valid number (i.e. 41 or 61, depending on chip).
*/
- if (is_bpn) {
- bargraph_sign = ((buf[11] & (1 << 7)) != 0) ? -1 : 1;
- bargraph_value = (buf[11] & 0x7f);
- bargraph_value *= bargraph_sign;
- sr_spew("The bargraph value is %d.", bargraph_value);
- } else {
- sr_spew("The bargraph is not active.");
+ if (info->is_bpn) {
+ info->bargraph_sign = ((buf[11] & (1 << 7)) != 0) ? -1 : 1;
+ info->bargraph_value = (buf[11] & 0x7f);
+ info->bargraph_value *= info->bargraph_sign;
}
/* Byte 12: Always '\r' (carriage return, 0x0d, 13) */
/* Byte 13: Always '\n' (newline, 0x0a, 10) */
+}
+static void handle_flags(struct sr_datafeed_analog *analog, float *floatval,
+ const struct fs9922_info *info)
+{
/* Factors */
- if (is_nano)
+ if (info->is_nano)
*floatval /= 1000000000;
- if (is_micro)
+ if (info->is_micro)
*floatval /= 1000000;
- if (is_milli)
+ if (info->is_milli)
*floatval /= 1000;
- if (is_kilo)
+ if (info->is_kilo)
*floatval *= 1000;
- if (is_mega)
+ if (info->is_mega)
*floatval *= 1000000;
/* Measurement modes */
- if (is_volt) {
+ if (info->is_volt) {
analog->mq = SR_MQ_VOLTAGE;
analog->unit = SR_UNIT_VOLT;
}
- if (is_ampere) {
+ if (info->is_ampere) {
analog->mq = SR_MQ_CURRENT;
analog->unit = SR_UNIT_AMPERE;
}
- if (is_ohm) {
+ if (info->is_ohm) {
analog->mq = SR_MQ_RESISTANCE;
analog->unit = SR_UNIT_OHM;
}
- if (is_hfe) {
+ if (info->is_hfe) {
analog->mq = SR_MQ_GAIN;
analog->unit = SR_UNIT_UNITLESS;
}
- if (is_hertz) {
+ if (info->is_hertz) {
analog->mq = SR_MQ_FREQUENCY;
analog->unit = SR_UNIT_HERTZ;
}
- if (is_farad) {
+ if (info->is_farad) {
analog->mq = SR_MQ_CAPACITANCE;
analog->unit = SR_UNIT_FARAD;
}
- if (is_celsius) {
+ if (info->is_celsius) {
analog->mq = SR_MQ_TEMPERATURE;
analog->unit = SR_UNIT_CELSIUS;
}
- if (is_fahrenheit) {
+ if (info->is_fahrenheit) {
analog->mq = SR_MQ_TEMPERATURE;
analog->unit = SR_UNIT_FAHRENHEIT;
}
- if (is_beep) {
+ if (info->is_beep) {
analog->mq = SR_MQ_CONTINUITY;
analog->unit = SR_UNIT_BOOLEAN;
*floatval = (*floatval < 0.0) ? 0.0 : 1.0;
}
- if (is_diode) {
+ if (info->is_diode) {
analog->mq = SR_MQ_VOLTAGE;
analog->unit = SR_UNIT_VOLT;
}
- if (is_percent) {
+ if (info->is_percent) {
analog->mq = SR_MQ_DUTY_CYCLE;
analog->unit = SR_UNIT_PERCENTAGE;
}
/* Measurement related flags */
- if (is_ac)
+ if (info->is_ac)
analog->mqflags |= SR_MQFLAG_AC;
- if (is_dc)
+ if (info->is_dc)
analog->mqflags |= SR_MQFLAG_DC;
- if (is_auto)
+ if (info->is_auto)
analog->mqflags |= SR_MQFLAG_AUTORANGE;
- if (is_hold)
+ if (info->is_hold)
analog->mqflags |= SR_MQFLAG_HOLD;
- if (is_max)
+ if (info->is_max)
analog->mqflags |= SR_MQFLAG_MAX;
- if (is_min)
+ if (info->is_min)
analog->mqflags |= SR_MQFLAG_MIN;
- if (is_rel)
+ if (info->is_rel)
analog->mqflags |= SR_MQFLAG_RELATIVE;
/* Other flags */
- if (is_apo)
+ if (info->is_apo)
sr_spew("Automatic power-off function is active.");
- if (is_bat)
+ if (info->is_bat)
sr_spew("Battery is low.");
- if (is_z1)
+ if (info->is_z1)
sr_spew("User-defined LCD symbol 1 is active.");
- if (is_z2)
+ if (info->is_z2)
sr_spew("User-defined LCD symbol 2 is active.");
- if (is_z3)
+ if (info->is_z3)
sr_spew("User-defined LCD symbol 3 is active.");
- if (is_z4)
+ if (info->is_z4)
sr_spew("User-defined LCD symbol 4 is active.");
+ if (info->is_bpn)
+ sr_spew("The bargraph value is %d.", info->bargraph_value);
+ else
+ sr_spew("The bargraph is not active.");
- return SR_OK;
+}
+
+SR_PRIV gboolean sr_fs9922_packet_valid(const uint8_t *buf)
+{
+ struct fs9922_info info;
+
+ /* Byte 0: Sign (must be '+' or '-') */
+ if (buf[0] != '+' && buf[0] != '-')
+ return FALSE;
+
+ /* Byte 12: Always '\r' (carriage return, 0x0d, 13) */
+ /* Byte 13: Always '\n' (newline, 0x0a, 10) */
+ if (buf[12] != '\r' || buf[13] != '\n')
+ return FALSE;
+
+ parse_flags(buf, &info);
+
+ return flags_valid(&info);
}
/**
- * Parse a Fortune Semiconductor FS9922-DMM3/4 protocol packet.
+ * Parse a protocol packet.
*
- * @param buf Buffer containing the 14-byte protocol packet.
- * @param floatval Pointer to a float variable. That variable will be modified
- * in-place depending on the protocol packet.
+ * @param buf Buffer containing the protocol packet. Must not be NULL.
+ * @param floatval Pointer to a float variable. That variable will contain the
+ * result value upon parsing success. Must not be NULL.
* @param analog Pointer to a struct sr_datafeed_analog. The struct will be
* filled with data according to the protocol packet.
+ * Must not be NULL.
+ * @param info Pointer to a struct fs9922_info. The struct will be filled
+ * with data according to the protocol packet. Must not be NULL.
*
* @return SR_OK upon success, SR_ERR upon failure. Upon errors, the
* 'analog' variable contents are undefined and should not be used.
*/
-SR_PRIV int sr_dmm_parse_fs9922(const uint8_t *buf, float *floatval,
- struct sr_datafeed_analog *analog)
+SR_PRIV int sr_fs9922_parse(const uint8_t *buf, float *floatval,
+ struct sr_datafeed_analog *analog, void *info)
{
int ret;
+ struct fs9922_info *info_local;
+
+ info_local = (struct fs9922_info *)info;
if ((ret = parse_value(buf, floatval)) != SR_OK) {
sr_err("Error parsing value: %d.", ret);
return ret;
}
- if ((ret = parse_flags(buf, floatval, analog)) != SR_OK) {
- sr_err("Error parsing flags: %d.", ret);
- return ret;
- }
+ parse_flags(buf, info_local);
+ handle_flags(analog, floatval, info_local);
return SR_OK;
}
projects / libsigrok.git / commitdiff