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gpio: gpio in/out both work

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* Python example included.

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
This commit is contained in:
Thomas Ingleby
2014-04-11 15:55:01 +01:00
parent 6d13a41c96
commit e64ffcf77d
2 changed files with 19 additions and 0 deletions
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14
examples/python/blink-io8.py Normal file
View File

@@ -0,0 +1,14 @@
#!/usr/bin/env python3
import pymaa as maa
import time
x = maa.gpio_t()
maa.gpio_init(x, 26)
maa.gpio_dir(x, "out")
while True:
maa.gpio_write(x,1)
time.sleep(0.2)
maa.gpio_write(x,0)
time.sleep(0.2)

5
src/gpio/gpio.c
View File

@@ -63,6 +63,8 @@ gpio_mode(gpio_t *gpio, gpio_mode_t mode) {
void void
gpio_dir(gpio_t *gpio, gpio_dir_t dir) { gpio_dir(gpio_t *gpio, gpio_dir_t dir) {
fclose(gpio->value_fp);
gpio->value_fp = NULL;
char filepath[64]; char filepath[64];
snprintf(filepath, 64, "/sys/class/gpio/gpio%d/direction", gpio->pin); snprintf(filepath, 64, "/sys/class/gpio/gpio%d/direction", gpio->pin);
int fd; int fd;
@@ -85,6 +87,7 @@ gpio_read(gpio_t *gpio) {
fseek(gpio->value_fp, SEEK_SET, 0); fseek(gpio->value_fp, SEEK_SET, 0);
char buffer[2]; char buffer[2];
fread(buffer, 2, 1, gpio->value_fp); fread(buffer, 2, 1, gpio->value_fp);
fseek(gpio->value_fp, SEEK_SET, 0);
return atoi(buffer); return atoi(buffer);
} }
@@ -95,6 +98,8 @@ gpio_write(gpio_t *gpio, int value) {
} }
fseek(gpio->value_fp, SEEK_SET, 0); fseek(gpio->value_fp, SEEK_SET, 0);
fprintf(gpio->value_fp, "%d", value); fprintf(gpio->value_fp, "%d", value);
fseek(gpio->value_fp, SEEK_SET, 0);
} }
void void