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linux: userspace GPIO control

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Allow use host GPIO pins for non-realtime purposes.

Signed-off-by: Andrey Kunitsyn <blackicebox@gmail.com>
This commit is contained in:
andryblack
2020-04-24 00:16:31 +03:00
committed by KevinOConnor
parent f0c394de81
commit 8fd330c54e
10 changed files with 187 additions and 22 deletions
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16
src/linux/gpio.h
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@@ -4,17 +4,25 @@
#include <stdint.h> // uint8_t
struct gpio_out {
uint32_t pin;
struct gpio_line* line;
};
struct gpio_out gpio_out_setup(uint8_t pin, uint8_t val);
struct gpio_out gpio_out_setup(uint32_t pin, uint8_t val);
void gpio_out_reset(struct gpio_out g, uint8_t val);
void gpio_out_toggle_noirq(struct gpio_out g);
void gpio_out_toggle(struct gpio_out g);
void gpio_out_write(struct gpio_out g, uint8_t val);
struct gpio_in {
struct gpio_line* line;
};
struct gpio_in gpio_in_setup(uint32_t pin, int8_t pull_up);
void gpio_in_reset(struct gpio_in g, int8_t pull_up);
uint8_t gpio_in_read(struct gpio_in g);
struct gpio_adc {
int fd;
};
struct gpio_adc gpio_adc_setup(uint8_t pin);
struct gpio_adc gpio_adc_setup(uint32_t pin);
uint32_t gpio_adc_sample(struct gpio_adc g);
uint16_t gpio_adc_read(struct gpio_adc g);
void gpio_adc_cancel_sample(struct gpio_adc g);
@@ -32,7 +40,7 @@ struct gpio_pwm {
int fd;
uint32_t period;
};
struct gpio_pwm gpio_pwm_setup(uint8_t pin, uint32_t cycle_time, uint16_t val);
struct gpio_pwm gpio_pwm_setup(uint32_t pin, uint32_t cycle_time, uint16_t val);
void gpio_pwm_write(struct gpio_pwm g, uint16_t val);
struct i2c_config {