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cleanup of brettcvz's read_byte function, added read_word since he really needs 12 bits of data. finally fixed the gpio cleanup() without argument issue once and for all, sorry for lying howientc

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This commit is contained in:
Robert Wolterman
2017-01-29 22:58:41 +00:00
parent 6beacbb382
commit cd85e2b5eb
8 changed files with 130 additions and 41 deletions
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55
source/event_gpio.c
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@ -506,8 +506,7 @@ int gpio_get_value(int gpio, unsigned int *value)
int fd = fd_lookup(gpio);
char ch;
if (!fd)
{
if (!fd) {
if ((fd = open_value_file(gpio)) == -1) {
char err[256];
snprintf(err, sizeof(err), "gpio_get_value: could not open GPIO %d value file", gpio);
@ -547,6 +546,58 @@ int gpio_get_value(int gpio, unsigned int *value)
return 0;
}
int gpio_get_more(int gpio, int bits, unsigned int *value)
{
int fd = fd_lookup(gpio);
char ch;
if (!fd) {
if ((fd = open_value_file(gpio)) == -1) {
char err[256];
snprintf(err, sizeof(err), "gpio_get_more: could not open GPIO %d value file", gpio);
add_error_msg(err);
return -1;
}
}
// Loop for our number of bits
int i;
for (i = 0; i < bits; i++) {
if (lseek(fd, 0, SEEK_SET) < 0) {
char err[256];
snprintf(err, sizeof(err), "gpio_get_more: could not seek GPIO %d (%s)", gpio, strerror(errno));
add_error_msg(err);
return -1;
}
ssize_t s = read(fd, &ch, sizeof(ch));
if (s < 0) {
char err[256];
snprintf(err, sizeof(err), "gpio_get_more: could not read GPIO %d (%s)", gpio, strerror(errno));
add_error_msg(err);
return -1;
}
if (ch == '1') {
*value |= (1 << i);
} else if (ch == '0') {
*value |= (0 << i);
} else {
char err[256];
snprintf(err, sizeof(err), "gpio_get_more: unrecognized read GPIO %d (%c)", gpio, ch);
add_error_msg(err);
return -1;
}
if (DEBUG) {
printf(" ** gpio_get_more: %c **\n", ch);
printf(" ** gpio_get_more: current value: %u **\n", *value);
}
}
return 0;
}
int gpio_set_edge(int gpio, unsigned int edge)
{
int fd;