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- #pragma once
- #include <stdbool.h>
- #include "gpio.h"
- typedef int16_t spi_status_t;
- #if defined(__AVR_AT90USB162__) || defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__)
- # define SPI_SS_PIN B0
- #elif defined(__AVR_ATmega32A__)
- # define SPI_SS_PIN B4
- #elif defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)
- # define SPI_SS_PIN B2
- #endif
- #define SPI_STATUS_SUCCESS (0)
- #define SPI_STATUS_ERROR (-1)
- #define SPI_STATUS_TIMEOUT (-2)
- #define SPI_TIMEOUT_IMMEDIATE (0)
- #define SPI_TIMEOUT_INFINITE (0xFFFF)
- #ifdef __cplusplus
- extern "C" {
- #endif
- void spi_init(void);
- bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor);
- spi_status_t spi_write(uint8_t data);
- spi_status_t spi_read(void);
- spi_status_t spi_transmit(const uint8_t *data, uint16_t length);
- spi_status_t spi_receive(uint8_t *data, uint16_t length);
- void spi_stop(void);
- #ifdef __cplusplus
- }
- #endif
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