From: Guido Trentalancia <redacted>
Date: Tue, 20 Nov 2018 22:24:07 +0000 (+0100)
Subject: hameg-hmo: Get SCPI_CMD_GET_HORIZONTAL_DIV at runtime.
X-Git-Url: https://sigrok.org/gitaction?a=commitdiff_plain;h=29a9b1a0bd0af79e0eb2adee594f42895452344c;p=libsigrok.git

hameg-hmo: Get SCPI_CMD_GET_HORIZONTAL_DIV at runtime.

Get the number of horizontal divisions from the device (at runtime)
instead of hardcoding its value in the driver.
---

diff --git a/src/hardware/hameg-hmo/protocol.c b/src/hardware/hameg-hmo/protocol.c
index 9135601c..167c1a4f 100644
--- a/src/hardware/hameg-hmo/protocol.c
+++ b/src/hardware/hameg-hmo/protocol.c
@@ -34,6 +34,7 @@ static const char *hameg_scpi_dialect[] = {
 	[SCPI_CMD_GET_DIG_DATA]		      = ":FORM UINT,8;:POD%d:DATA?",
 	[SCPI_CMD_GET_TIMEBASE]		      = ":TIM:SCAL?",
 	[SCPI_CMD_SET_TIMEBASE]		      = ":TIM:SCAL %s",
+	[SCPI_CMD_GET_HORIZONTAL_DIV]	      = ":TIM:DIV?",
 	[SCPI_CMD_GET_COUPLING]		      = ":CHAN%d:COUP?",
 	[SCPI_CMD_SET_COUPLING]		      = ":CHAN%d:COUP %s",
 	[SCPI_CMD_GET_SAMPLE_RATE]	      = ":ACQ:SRAT?",
@@ -71,6 +72,7 @@ static const char *rohde_schwarz_log_not_pod_scpi_dialect[] = {
 	[SCPI_CMD_GET_DIG_DATA]		      = ":FORM UINT,8;:LOG%d:DATA?",
 	[SCPI_CMD_GET_TIMEBASE]		      = ":TIM:SCAL?",
 	[SCPI_CMD_SET_TIMEBASE]		      = ":TIM:SCAL %s",
+	[SCPI_CMD_GET_HORIZONTAL_DIV]	      = ":TIM:DIV?",
 	[SCPI_CMD_GET_COUPLING]		      = ":CHAN%d:COUP?",
 	[SCPI_CMD_SET_COUPLING]		      = ":CHAN%d:COUP %s",
 	[SCPI_CMD_GET_SAMPLE_RATE]	      = ":ACQ:SRAT?",
@@ -364,7 +366,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &hameg_scpi_dialect,
@@ -406,7 +407,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &hameg_scpi_dialect,
@@ -448,7 +448,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &hameg_scpi_dialect,
@@ -490,7 +489,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &hameg_scpi_dialect,
@@ -531,7 +529,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &hameg_scpi_dialect,
@@ -572,7 +569,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
@@ -613,7 +609,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
@@ -654,7 +649,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
@@ -695,7 +689,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
@@ -736,7 +729,6 @@ static struct scope_config scope_models[] = {
 		.vdivs = &vdivs,
 		.num_vdivs = ARRAY_SIZE(vdivs),
 
-		.num_xdivs = 12,
 		.num_ydivs = 8,
 
 		.scpi_dialect = &rohde_schwarz_log_not_pod_scpi_dialect,
@@ -1091,6 +1083,12 @@ SR_PRIV int hmo_scope_state_get(struct sr_dev_inst *sdi)
 
 	state->timebase = i;
 
+	/* Determine the number of horizontal (x) divisions. */
+	if (sr_scpi_get_int(sdi->conn,
+	    (*config->scpi_dialect)[SCPI_CMD_GET_HORIZONTAL_DIV],
+	    (int *)&config->num_xdivs) != SR_OK)
+		return SR_ERR;
+
 	if (sr_scpi_get_float(sdi->conn,
 			(*config->scpi_dialect)[SCPI_CMD_GET_HORIZ_TRIGGERPOS],
 			&tmp_float) != SR_OK)
@@ -1182,6 +1180,7 @@ SR_PRIV int hmo_init_device(struct sr_dev_inst *sdi)
 		sr_dbg("Unsupported device.");
 		return SR_ERR_NA;
 	}
+
 	/* Configure the number of PODs given the number of digital channels. */
 	scope_models[model_index].digital_pods = scope_models[model_index].digital_channels / DIGITAL_CHANNELS_PER_POD;
 
diff --git a/src/hardware/hameg-hmo/protocol.h b/src/hardware/hameg-hmo/protocol.h
index df4a4e4c..975ea7e3 100644
--- a/src/hardware/hameg-hmo/protocol.h
+++ b/src/hardware/hameg-hmo/protocol.h
@@ -73,8 +73,8 @@ struct scope_config {
 	const uint64_t (*vdivs)[][2];
 	const uint8_t num_vdivs;
 
-	const uint8_t num_xdivs;
-	const uint8_t num_ydivs;
+	unsigned int num_xdivs;
+	const unsigned int num_ydivs;
 
 	const char *(*scpi_dialect)[];
 };
diff --git a/src/scpi.h b/src/scpi.h
index b66dd554..7d9a39bb 100644
--- a/src/scpi.h
+++ b/src/scpi.h
@@ -35,6 +35,7 @@
 enum {
 	SCPI_CMD_GET_TIMEBASE = 1,
 	SCPI_CMD_SET_TIMEBASE,
+	SCPI_CMD_GET_HORIZONTAL_DIV,
 	SCPI_CMD_GET_VERTICAL_SCALE,
 	SCPI_CMD_SET_VERTICAL_SCALE,
 	SCPI_CMD_GET_TRIGGER_SLOPE,