File syn_soft_spi.h¶

File List > drivers > syn_soft_spi.h
#ifndef SYN_SOFT_SPI_H
#define SYN_SOFT_SPI_H

#include "../common/syn_defs.h"

#include <stdbool.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
    SYN_SPI_MODE_0 = 0, 
    SYN_SPI_MODE_1 = 1, 
    SYN_SPI_MODE_2 = 2, 
    SYN_SPI_MODE_3 = 3  
} SYN_SPIMode;

typedef struct {
    SYN_GPIO_Pin sck;     
    SYN_GPIO_Pin mosi;    
    SYN_GPIO_Pin miso;    
    SYN_SPIMode mode;     
    uint32_t delay_loops; 
    // Cached states for faster transfer
    bool cpha;                   
    SYN_GPIO_State idle_state;   
    SYN_GPIO_State active_state; 
    // Optional chip select (set to (SYN_GPIO_Pin)-1 if unused)
    SYN_GPIO_Pin cs_pin; 
    bool cs_active_low;  
} SYN_SoftSPI;

void syn_soft_spi_init(SYN_SoftSPI *spi, SYN_GPIO_Pin sck, SYN_GPIO_Pin mosi, SYN_GPIO_Pin miso,
                       SYN_SPIMode mode, uint32_t delay_loops);

uint8_t syn_soft_spi_transfer(const SYN_SoftSPI *spi, uint8_t data);

void syn_soft_spi_transfer_bulk(SYN_SoftSPI *spi, const uint8_t *tx, uint8_t *rx, size_t len);

void syn_soft_spi_set_cs(SYN_SoftSPI *spi, SYN_GPIO_Pin cs_pin, bool active_low);

void syn_soft_spi_select(SYN_SoftSPI *spi);

void syn_soft_spi_deselect(SYN_SoftSPI *spi);

#ifdef __cplusplus
}
#endif
#endif // SYN_SOFT_SPI_H