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16d2ec3a90
Add support for reading analog values via the standard Linux IIO interface. This can be used on Replicape boards to sample analog input pins. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
37 lines
887 B
C
37 lines
887 B
C
#ifndef __GENERIC_GPIO_H
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#define __GENERIC_GPIO_H
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#include <stdint.h> // uint8_t
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struct gpio_out {
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uint8_t pin;
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};
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struct gpio_out gpio_out_setup(uint8_t pin, uint8_t val);
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void gpio_out_toggle(struct gpio_out g);
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void gpio_out_write(struct gpio_out g, uint8_t val);
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struct gpio_in {
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uint8_t pin;
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};
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struct gpio_in gpio_in_setup(uint8_t pin, int8_t pull_up);
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uint8_t gpio_in_read(struct gpio_in g);
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struct gpio_pwm {
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uint8_t pin;
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};
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struct gpio_pwm gpio_pwm_setup(uint8_t pin, uint32_t cycle_time, uint8_t val);
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void gpio_pwm_write(struct gpio_pwm g, uint8_t val);
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struct gpio_adc {
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uint8_t pin;
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};
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struct gpio_adc gpio_adc_setup(uint8_t pin);
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uint32_t gpio_adc_sample(struct gpio_adc g);
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uint16_t gpio_adc_read(struct gpio_adc g);
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void gpio_adc_cancel_sample(struct gpio_adc g);
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void spi_config(void);
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void spi_transfer(char *data, uint8_t len);
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#endif // gpio.h
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