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ubb-patgen/ubb-patgen.c: support trigger sequences, e.g., 01 for a rising edge

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This commit is contained in:
Werner Almesberger 2013-01-16 04:45:49 -03:00
parent 4729d00b30
commit 66080fe72e
2 changed files with 34 additions and 24 deletions
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7
ubb-patgen/README
View File

@ -153,6 +153,10 @@ send the pattern immediately.
Likewise, -t 1 waits for CLK to become 1. -t cannot be used with
the -C option.
The trigger can also be a sequence, e.g., -t 01 would first wait
for CLK to become zero (if it isn't already), then wait for it to
become one.
ubb-patgen usually starts the pattern about 2-10 us after the
trigger, but this can be delayed by other system activity. An
extra delay can be added with the option -w, e.g.,
@ -164,4 +168,5 @@ The trigger signal can be debounced with the option -d, e.g.,
# ubb-patgen -t 0 -d 100us 0f0
This accepts the trigger only after it has been zero for at least
100 microseconds.
100 microseconds. If the trigger is a sequence, debouncing is
applied at each step.

51
ubb-patgen/ubb-patgen.c
View File

@ -354,7 +354,7 @@ static void wait_shifted(const struct mmcclk *clk)
}
static void wait_trigger(int trigger, int debounce,
static void wait_trigger(const char *trigger, int debounce,
const struct timespec *debounce_ns)
{
struct timespec end, now;
@ -363,10 +363,11 @@ static void wait_trigger(int trigger, int debounce,
* @@@ could also try to use POSIX per-process timers here. May be
* slightly cleaner but could increase deviations.
*/
while (1) {
while (PIN(UBB_CLK) != trigger);
while (*trigger) {
while (PIN(UBB_CLK) != *trigger-'0');
if (!debounce)
return;
goto next;
again:
if (clock_gettime(CLOCK_REALTIME, &end)) {
perror("clock_gettime");
exit(1);
@ -377,24 +378,27 @@ static void wait_trigger(int trigger, int debounce,
end.tv_nsec -= 1000000000;
end.tv_sec++;
}
while (PIN(UBB_CLK) == trigger) {
while (PIN(UBB_CLK) == *trigger-'0') {
if (clock_gettime(CLOCK_REALTIME, &now)) {
perror("clock_gettime");
exit(1);
}
if (now.tv_sec > end.tv_sec)
return;
goto next;
if (now.tv_sec == end.tv_sec &&
now.tv_nsec >= end.tv_nsec)
return;
goto next;
}
goto again;
next:
trigger++;
}
}
static void mmc_buffer(const struct mmcclk *clk,
uint8_t first, unsigned long buf, int nibbles, uint32_t mask,
int trigger, int debounce, const struct timespec *debounce_ns,
const char *trigger, int debounce, const struct timespec *debounce_ns,
const struct timespec *wait_ns)
{
/*
@ -442,7 +446,7 @@ static void mmc_buffer(const struct mmcclk *clk,
realtimize();
if (trigger != -1)
if (trigger)
wait_trigger(trigger, debounce, debounce_ns);
if (wait_ns->tv_sec || wait_ns->tv_nsec)
if (nanosleep(wait_ns, NULL))
@ -476,7 +480,7 @@ static void mmc_buffer(const struct mmcclk *clk,
static void send_buffer(const struct mmcclk *clk,
const uint8_t *buf, int nibbles, uint32_t mask,
int trigger, int debounce, const struct timespec *debounce_ns,
const char *trigger, int debounce, const struct timespec *debounce_ns,
const struct timespec *wait_ns)
{
unsigned long phys;
@ -493,7 +497,7 @@ static void send_buffer(const struct mmcclk *clk,
static void dma_pattern(const struct mmcclk *clk,
const char *pattern, uint32_t mask, int trigger,
const char *pattern, uint32_t mask, const char *trigger,
int debounce, const struct timespec *debounce_ns,
const struct timespec *wait_ns)
{
@ -511,7 +515,7 @@ static void dma_pattern(const struct mmcclk *clk,
exit(1);
}
if (trigger != -1) {
if (trigger) {
PDFUNC = UBB_CLK;
IN(UBB_CLK);
}
@ -676,7 +680,7 @@ static void usage(const char *name)
"usage: %s\n"
" %s [-q] -f freq_hz|-i interval_s\n"
" %s [-q] [-f freq_hz|-i interval_s] -c [active_s]\n"
" %s [-q] [-f freq_hz|-i interval_s] [-C|-t 0|1 [-d debounce_s]]\n"
" %s [-q] [-f freq_hz|-i interval_s] [-C|-t 0|1... [-d debounce_s]]\n"
" [-w wait_s] [-m mask] [-p] file|pattern\n\n"
" -c output bus clock on CLK without sending a pattern\n"
" -C temporarily output bus clock on CLK (for debugging)\n"
@ -688,7 +692,7 @@ static void usage(const char *name)
" -p force interpretation of argument as pattern (and not file)\n"
" -q quiet. Don't pretty-print frequencies; don't report clock\n"
" differences.\n"
" -t 0|1 start pattern when trigger/CLK becomes 0 or 1 respectively\n"
" -t 0|1... start pattern when trigger/CLK has passed through the sequence\n"
" (default: start pattern immediately)\n"
" -w wait_s wait between trigger and sending the pattern\n\n"
" active_s keep running that many seconds after setting the clock\n"
@ -719,7 +723,7 @@ int main(int argc, char **argv)
int active_rel;
int keep_clk = 1;
uint8_t mask = 0xf;
int trigger = -1;
const char *trigger = NULL;
struct timespec debounce_ns;
int debounce = 0, debounce_rel;
struct timespec wait_ns = { 0, 0 };
@ -727,6 +731,7 @@ int main(int argc, char **argv)
char *end;
int c;
unsigned long tmp;
const char *p;
while ((c = getopt(argc, argv, "cCd:f:i:m:pqt:w:")) != EOF)
switch (c) {
@ -769,11 +774,11 @@ int main(int argc, char **argv)
quiet = 1;
break;
case 't':
if (!strcmp(optarg, "0"))
trigger = 0;
else if (!strcmp(optarg, "1"))
trigger = 1;
else
trigger = optarg;
if (!*trigger)
usage(*argv);
for (p = trigger; *p; p++)
if (*p != '0' && *p != '1')
usage(*argv);
break;
case 'w':
@ -789,14 +794,14 @@ int main(int argc, char **argv)
if (clkout && clk_only)
usage(*argv);
if ((clkout || clk_only) && trigger != -1)
if ((clkout || clk_only) && trigger)
usage(*argv);
switch (argc-optind) {
case 0:
if (clk_only)
break;
if (clkout || force_pattern || trigger != -1)
if (clkout || force_pattern || trigger)
usage(*argv);
ubb_open(UBB_ALL);
@ -857,7 +862,7 @@ int main(int argc, char **argv)
perror("nanosleep");
if (pattern) {
mmcclk_stop();
ubb_close(mask << 10 | (trigger == -1 ? 0 : UBB_CLK));
ubb_close(mask << 10 | (trigger ? UBB_CLK : 0));
} else if (keep_clk) {
ubb_close(UBB_CLK);
} else {