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gpio: Tempory fix when changing direction

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* Added unexport feature

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
This commit is contained in:
Thomas Ingleby
2014-04-14 17:13:31 +01:00
parent 40438d709a
commit 791c4b4d71
1 changed files with 10 additions and 4 deletions
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14
src/gpio/gpio.c
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@@ -63,10 +63,9 @@ gpio_mode(gpio_t *gpio, gpio_mode_t mode) {
void
gpio_dir(gpio_t *gpio, gpio_dir_t dir) {
//if(gpio->value_fp != NULL) {
// fclose(gpio->value_fp);
// gpio->value_fp = NULL;
// }
if(gpio->value_fp != NULL) {
gpio->value_fp = NULL;
}
char filepath[64];
snprintf(filepath, 64, "/sys/class/gpio/gpio%d/direction", gpio->pin);
@@ -105,7 +104,14 @@ gpio_write(gpio_t *gpio, int value) {
void
gpio_close(gpio_t *gpio) {
FILE *unexport_f;
if((unexport_f = fopen("/sys/class/gpio/unexport", "w")) == NULL) {
fprintf(stderr, "Failed to open unexport for writing!\n");
} else {
fprintf(unexport_f, "%d", gpio->pin);
fclose(unexport_f);
}
}
int