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gpio: add behaviour for pin without direction

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If a gpio doesnt have a direction, like some muxes do, try and set value
if HIGH or LOW was passed.

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
This commit is contained in:
Thomas Ingleby
2015-01-22 17:33:46 +00:00
parent d88da134af
commit e76d85eade
1 changed files with 10 additions and 1 deletions
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9
src/gpio/gpio.c
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@@ -414,8 +414,17 @@ mraa_gpio_dir(mraa_gpio_context dev, gpio_dir_t dir)
int direction = open(filepath, O_RDWR); int direction = open(filepath, O_RDWR);
if (direction == -1) { if (direction == -1) {
// Direction Failed to Open. If HIGH or LOW was passed will try and set
// If not fail as usual.
switch (dir) {
case MRAA_GPIO_OUT_HIGH:
return mraa_gpio_write(dev, 1);
case MRAA_GPIO_OUT_LOW:
return mraa_gpio_write(dev, 0);
default:
return MRAA_ERROR_INVALID_RESOURCE; return MRAA_ERROR_INVALID_RESOURCE;
} }
}
char bu[MAX_SIZE]; char bu[MAX_SIZE];
int length; int length;