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/* Copyright 2020
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "quantum.h"
typedef int16_t spi_status_t;
// Hardware SS pin is defined in the header so that user code can refer to it
#if 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__)
# 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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