- /* 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_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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