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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 <mranostay@gmail.com>
This commit is contained in:
Matt Ranostay 2013-08-24 22:00:52 -07:00 committed by Bert Vermeulen
parent 503133bb5f
commit 967760a893
2 changed files with 39 additions and 0 deletions
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36
hardware/openbench-logic-sniffer/api.c
View File

@ -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.");

3
hardware/openbench-logic-sniffer/protocol.h
View File

@ -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 {