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ubb-patgen/ubb-patgen.c: new option -w to add delay before sending the pattern

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This commit is contained in:
Werner Almesberger 2013-01-16 03:44:30 -03:00
parent 0129a59f86
commit 2161341267
2 changed files with 30 additions and 10 deletions
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5
ubb-patgen/README
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@ -154,7 +154,10 @@ Likewise, -t 1 waits for CLK to become 1. -t cannot be used with
the -C option.
ubb-patgen usually starts the pattern about 2-10 us after the
trigger, but this can be delayed by other system activity.
trigger, but this can be delayed by other system activity. An
extra delay can be added with the option -w, e.g.,
# ubb-patgen -t 0 -w 1s 010
The trigger signal can be debounced with the option -d, e.g.,

35
ubb-patgen/ubb-patgen.c
View File

@ -363,7 +363,8 @@ static void wait_trigger(int trigger, int debounce,
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)
int trigger, int debounce, const struct timespec *debounce_ns,
const struct timespec *wait_ns)
{
/*
* If under control of the MMC controller, DATx tri-state until we
@ -410,6 +411,9 @@ static void mmc_buffer(const struct mmcclk *clk,
if (trigger != -1)
wait_trigger(trigger, debounce, debounce_ns);
if (wait_ns->tv_sec || wait_ns->tv_nsec)
if (nanosleep(wait_ns, NULL))
perror("nanosleep");
/*
* Send the pattern with DMA. Note that we still have to send the first
@ -437,7 +441,8 @@ 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)
int trigger, int debounce, const struct timespec *debounce_ns,
const struct timespec *wait_ns)
{
unsigned long phys;
@ -448,13 +453,14 @@ static void send_buffer(const struct mmcclk *clk,
phys = physmem_xlat((void *) buf);
mmc_buffer(clk, buf[0] >> 4, phys, nibbles, mask,
trigger, debounce, debounce_ns);
trigger, debounce, debounce_ns, wait_ns);
}
static void dma_pattern(const struct mmcclk *clk,
const char *pattern, uint32_t mask, int trigger,
int debounce, const struct timespec *debounce_ns)
int debounce, const struct timespec *debounce_ns,
const struct timespec *wait_ns)
{
const uint8_t *buf;
int n;
@ -484,7 +490,8 @@ static void dma_pattern(const struct mmcclk *clk,
PDDATS = (buf[0] >> 4) << 10;
PDDIRS = mask;
send_buffer(clk, buf, n, mask, trigger, debounce, debounce_ns);
send_buffer(clk, buf, n, mask,
trigger, debounce, debounce_ns, wait_ns);
/* Final static state: the last pattern. */
@ -635,7 +642,7 @@ static void usage(const char *name)
" %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"
" [-m mask] [-p] file|pattern\n\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"
" -d deb_s trigger debounce time (default: no debouncing)\n"
@ -647,7 +654,8 @@ static void usage(const char *name)
" -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"
" (default: start pattern immediately)\n\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"
" (default: exit immediately but leave the clock on)\n"
" file file containing the pattern\n"
@ -679,11 +687,13 @@ int main(int argc, char **argv)
int trigger = -1;
struct timespec debounce_ns;
int debounce = 0, debounce_rel;
struct timespec wait_ns = { 0, 0 };
int wait_rel;
char *end;
int c;
unsigned long tmp;
while ((c = getopt(argc, argv, "cCd:f:i:m:pqt:")) != EOF)
while ((c = getopt(argc, argv, "cCd:f:i:m:pqt:w:")) != EOF)
switch (c) {
case 'f':
if (!frequency(optarg, &bus_hz, &bus_rel))
@ -731,6 +741,13 @@ int main(int argc, char **argv)
else
usage(*argv);
break;
case 'w':
if (!duration_timespec(optarg,
&wait_ns, &wait_rel))
usage(*argv);
if (wait_rel < 0)
usage(*argv);
break;
default:
usage(*argv);
}
@ -798,7 +815,7 @@ int main(int argc, char **argv)
if (pattern)
dma_pattern(&clk, pattern, mask << 10,
trigger, debounce, &debounce_ns);
trigger, debounce, &debounce_ns, &wait_ns);
if (!keep_clk)
if (nanosleep(&active_ns, NULL))