64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
#include <assert.h>
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#include <stdint.h>
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#include <stddef.h>
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#include "gpio.h"
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#include "nrf_gpio.h"
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int gpio_open(const struct driver *drv)
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{
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assert(NULL != drv);
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struct gpio *this = (struct gpio *)(drv->dev);
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if(this->dir == OUT) {
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nrf_gpio_cfg_output((uint32_t)(this->pin));
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nrf_gpio_pin_clear(this->pin);
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}
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// FIXME: implement input configuration
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return 0;
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}
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int gpio_close(const struct driver *drv)
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{
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assert(NULL != drv);
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struct gpio *this = (struct gpio *)(drv->dev);
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nrf_gpio_pin_clear(this->pin);
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return 0;
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}
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int gpio_read(const struct driver *drv, char *buffer, unsigned int len)
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{
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assert(NULL != drv);
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if(len == 0) {
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return 0;
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}
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struct gpio *this = (struct gpio *)(drv->dev);
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uint32_t value = nrf_gpio_pin_read(this->pin);
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buffer[0] = value + 0x30; // ascii convert
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return 1;
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}
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int gpio_write(const struct driver *drv, const char *buffer, unsigned int len)
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{
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assert((NULL != drv) && (NULL != buffer));
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if(len == 0) {
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return 0;
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}
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struct gpio *this = (struct gpio *)(drv->dev);
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nrf_gpio_pin_write(this->pin, buffer[0] - 0x30);
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return 1;
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}
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