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ubb-patgen/ubb-patgen.c: accept SI suffixes and a unit for durations as well

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This commit is contained in:
Werner Almesberger 2013-01-16 01:11:57 -03:00
parent 9930ae6576
commit c124e1a819
2 changed files with 56 additions and 7 deletions
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5
ubb-patgen/README
View File

@ -77,6 +77,11 @@ while and clean up on exit, add the delay in seconds, e.g.:
# ubb-patgen -f 500kHz -c 10
The delay can be followed by "m", "u", or "n" for the respective
multiplier. Furthermore, it can end with an optional "s". Note
that the minimum time ubb-patgen actually spends generating a
clock will typically be in the order of several milliseconds.
To stop the MMC bus clock, run
# ubb-patgen -c 0

58
ubb-patgen/ubb-patgen.c
View File

@ -465,6 +465,9 @@ static int frequency(const char *s, int *hz, int *rel)
f = strtod(s, &end);
if (end == s || f < 0)
return 0;
switch (*end) {
case 'M':
case 'm':
@ -503,6 +506,49 @@ static int frequency(const char *s, int *hz, int *rel)
}
static int duration(const char *s, struct timespec *res)
{
char *end;
double d;
d = strtod(s, &end);
if (end == s || d < 0)
return 0;
switch (*end) {
case 'M':
case 'm':
d /= 1e3;
end++;
break;
case 'U':
case 'u':
d /= 1e6;
end++;
break;
case 'N':
case 'n':
d /= 1e9;
end++;
break;
default:
break;
}
if (*end == 'S' || *end == 's')
end++;
if (*end)
return 0;
res->tv_sec = d;
res->tv_nsec = (d-res->tv_sec)*1e9;
return 1;
}
static void usage(const char *name)
{
fprintf(stderr,
@ -523,10 +569,12 @@ static void usage(const char *name)
" (default: exit immediately but leave the clock on)\n"
" file file containing the pattern\n"
" pattern send the specified pattern on DAT0 through DAT3\n\n"
"Frequency: the frequency in Hz, optionally followed by \"M\" or \"k\",\n"
"Frequency: the frequency in hertz, optionally followed by \"M\" or \"k\",\n"
" optionally followed by \"Hz\", optionally followed by \"+\" or \"-\".\n"
" \"+\" selects a frequency >= the specified one, \"-\" one <=.\n"
" Without +/-, the closest available frequency is selected.\n"
"Duration: the duration in seconds, optionally followed by \"m\", \"u\", or\n"
" \"n\", optionally followed by \"s\".\n"
"Pattern: hex digits corresponding to 1 for DAT0, 2 for DAT1, etc.\n"
" {n} repeats the preceding digit n times, e.g., 1{3} is equivalent to 111.\n"
, name, name, name, name);
@ -540,7 +588,6 @@ int main(int argc, char **argv)
int bus_hz = 0, clk_only = 0, clkout = 0, bus_rel = 0;
const char *pattern = NULL;
int quiet = 0, force_pattern = 0;
double active_s = 0;
struct timespec active_ns;
int keep_clk = 1;
uint8_t mask = 0xf;
@ -617,11 +664,8 @@ int main(int argc, char **argv)
if (clk_only) {
if (force_pattern)
usage(*argv);
active_s = strtod(argv[argc-1], &end);
if (*end)
if (!duration(argv[optind], &active_ns))
usage(*argv);
active_ns.tv_sec = (int) active_s;
active_ns.tv_nsec = (active_s-(int) active_s)*1e9;
keep_clk = 0;
} else {
pattern = argv[optind];
@ -653,7 +697,7 @@ int main(int argc, char **argv)
if (pattern)
dma_pattern(&clk, pattern, mask << 10, trigger);
if (active_s)
if (!keep_clk)
if (nanosleep(&active_ns, NULL))
perror("nanosleep");
if (pattern) {