From: Matt Ranostay <redacted>
Date: Sun, 25 Aug 2013 05:00:52 +0000 (-0700)
Subject: ols: add test mode support
X-Git-Tag: libsigrok-0.2.2~79
X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=commitdiff_plain;h=967760a8937e997ba9d7b729442f882947be154e

ols: add test mode support

ols allows both external and internal test patterns at ~20khz
which are helpful for unit tests and demos.

pattern=internal -> route pattern internally to all 32 pins
                      (input otherwise disabled)

pattern=external -> generates pattern on unbuffered pins 16:31
                      (which can be looped back to the buffered pins 0:15)

Signed-off-by: Matt Ranostay <redacted>
---

diff --git a/hardware/openbench-logic-sniffer/api.c b/hardware/openbench-logic-sniffer/api.c
index 63c98821..0000b42d 100644
--- a/hardware/openbench-logic-sniffer/api.c
+++ b/hardware/openbench-logic-sniffer/api.c
@@ -32,9 +32,25 @@ static const int32_t hwcaps[] = {
 	SR_CONF_TRIGGER_TYPE,
 	SR_CONF_CAPTURE_RATIO,
 	SR_CONF_LIMIT_SAMPLES,
+	SR_CONF_PATTERN_MODE,
 	SR_CONF_RLE,
 };
 
+#define STR_PATTERN_EXTERNAL "external"
+#define STR_PATTERN_INTERNAL "internal"
+
+/* Supported methods of test pattern outputs */
+enum {
+	/**
+	 * Capture pins 31:16 (unbuffered wing) output a test pattern
+	 * that can captured on pins 0:15.
+	 */
+	PATTERN_EXTERNAL,
+
+	/** Route test pattern internally to capture buffer. */
+	PATTERN_INTERNAL,
+};
+
 /* Probes are numbered 0-31 (on the PCB silkscreen). */
 SR_PRIV const char *ols_probe_names[NUM_PROBES + 1] = {
 	"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
@@ -235,6 +251,12 @@ static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi)
 	case SR_CONF_LIMIT_SAMPLES:
 		*data = g_variant_new_uint64(devc->limit_samples);
 		break;
+	case SR_CONF_PATTERN_MODE:
+		if (devc->flag_reg & FLAG_EXTERNAL_TEST_MODE)
+			*data = g_variant_new_string(STR_PATTERN_EXTERNAL);
+		else if (devc->flag_reg & FLAG_INTERNAL_TEST_MODE)
+			*data = g_variant_new_string(STR_PATTERN_INTERNAL);
+		break;
 	case SR_CONF_RLE:
 		*data = g_variant_new_boolean(devc->flag_reg & FLAG_RLE ? TRUE : FALSE);
 		break;
@@ -250,6 +272,7 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
 	struct dev_context *devc;
 	int ret;
 	uint64_t tmp_u64;
+	const char *stropt;
 
 	if (sdi->status != SR_ST_ACTIVE)
 		return SR_ERR_DEV_CLOSED;
@@ -278,6 +301,19 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
 		} else
 			ret = SR_OK;
 		break;
+	case SR_CONF_PATTERN_MODE:
+		stropt = g_variant_get_string(data, NULL);
+		ret = SR_OK;
+		if (!strcmp(stropt, STR_PATTERN_INTERNAL)) {
+			sr_info("Enabling internal test mode.");
+			devc->flag_reg |= FLAG_INTERNAL_TEST_MODE;
+		} else if (!strcmp(stropt, STR_PATTERN_EXTERNAL)) {
+			sr_info("Enabling external test mode.");
+			devc->flag_reg |= FLAG_EXTERNAL_TEST_MODE;
+		} else {
+			ret = SR_ERR;
+		}
+		break;
 	case SR_CONF_RLE:
 		if (g_variant_get_boolean(data)) {
 			sr_info("Enabling RLE.");
diff --git a/hardware/openbench-logic-sniffer/protocol.h b/hardware/openbench-logic-sniffer/protocol.h
index 3322409f..bf449e70 100644
--- a/hardware/openbench-logic-sniffer/protocol.h
+++ b/hardware/openbench-logic-sniffer/protocol.h
@@ -46,6 +46,7 @@
 /* Command opcodes */
 #define CMD_RESET                  0x00
 #define CMD_RUN                    0x01
+#define CMD_TESTMODE               0x03
 #define CMD_ID                     0x02
 #define CMD_METADATA               0x04
 #define CMD_SET_FLAGS              0x82
@@ -74,6 +75,8 @@
 #define FLAG_CLOCK_EXTERNAL        0x40
 #define FLAG_CLOCK_INVERTED        0x80
 #define FLAG_RLE                   0x0100
+#define FLAG_EXTERNAL_TEST_MODE    0x0400
+#define FLAG_INTERNAL_TEST_MODE    0x0800
 
 /* Private, per-device-instance driver context. */
 struct dev_context {