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| author | andryblack <blackicebox@gmail.com> | 2020-04-24 00:16:31 +0300 |
|---|---|---|
| committer | KevinOConnor <kevin@koconnor.net> | 2020-05-17 22:17:15 -0400 |
| commit | 8fd330c54e702719301072357c3db591eb16d489 (patch) | |
| tree | a4ce01b16b2f1d5df8609fa3c82557d52f365a12 /src/linux/analog.c | |
| parent | f0c394de8111ff7d498efd2e947d1d36788a9ad3 (diff) | |
| download | kutter-8fd330c54e702719301072357c3db591eb16d489.tar.gz kutter-8fd330c54e702719301072357c3db591eb16d489.tar.xz kutter-8fd330c54e702719301072357c3db591eb16d489.zip | |
linux: userspace GPIO control
Allow use host GPIO pins for non-realtime purposes.
Signed-off-by: Andrey Kunitsyn <blackicebox@gmail.com>
Diffstat (limited to 'src/linux/analog.c')
| -rw-r--r-- | src/linux/analog.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/linux/analog.c b/src/linux/analog.c index 2ce085a8..aa8fb701 100644 --- a/src/linux/analog.c +++ b/src/linux/analog.c @@ -15,15 +15,17 @@ DECL_CONSTANT("ADC_MAX", 4095); // Assume 12bit adc -DECL_ENUMERATION_RANGE("pin", "analog0", 0, 8); +#define ANALOG_START (1<<8) + +DECL_ENUMERATION_RANGE("pin", "analog0", ANALOG_START, 8); #define IIO_PATH "/sys/bus/iio/devices/iio:device0/in_voltage%d_raw" struct gpio_adc -gpio_adc_setup(uint8_t pin) +gpio_adc_setup(uint32_t pin) { char fname[256]; - snprintf(fname, sizeof(fname), IIO_PATH, pin); + snprintf(fname, sizeof(fname), IIO_PATH, pin-ANALOG_START); int fd = open(fname, O_RDONLY|O_CLOEXEC); if (fd < 0) { |