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author | Drashna Jael're <drashna@live.com> | 2021-10-11 20:36:47 -0700 |
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committer | Drashna Jael're <drashna@live.com> | 2021-10-11 20:36:47 -0700 |
commit | b34675555cbd9a71a797a7ebc2148cbf2e8f0efc (patch) | |
tree | 2d701310ccd3fc2c603d63536ab4a3c1d9b9381b /platforms/avr/drivers/spi_master.h | |
parent | bcddde8738dbba48c548f1e3f12a10bbf60a65d8 (diff) | |
parent | d9e077468ab3446cbd7306a453a73dad2c1403e8 (diff) |
Merge commit 'd9e077468ab3446cbd7306a453a73dad2c1403e8' into firmware_21
Diffstat (limited to 'platforms/avr/drivers/spi_master.h')
-rw-r--r-- | platforms/avr/drivers/spi_master.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/platforms/avr/drivers/spi_master.h b/platforms/avr/drivers/spi_master.h new file mode 100644 index 0000000000..8a30f47ae4 --- /dev/null +++ b/platforms/avr/drivers/spi_master.h @@ -0,0 +1,59 @@ +/* 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 <stdbool.h> + +#include "gpio.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 |