sd_spi.h

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#ifndef __SD_SPI_H
#define __SD_SPI_H
#ifdef __cplusplus
extern "C" {
#endif


extern SPI_HandleTypeDef hspi2;
extern struct sd_spi_dev spi2_dev;

enum sd_spi_error {
    SD_SPI_SUCCESS = 0x4A0D,        
    SD_SPI_NULL_ERROR,          
    SD_SPI_LOCKED,              
    SD_SPI_TIMEOUT,             
    SD_SPI_ERROR                
};

enum sd_spi_state {
    SD_SPI_INITIALIZED = 0x0E60,        
    SD_SPI_READY,               
    SD_SPI_BUSY,                
    SD_SPI_OVERFLOW             
};


enum sd_spi_rx_state {
    SD_SPI_RX_WAITING,          
    SD_SPI_RX_LENGTH,           
    SD_SPI_RX_PACKET,           
};

struct sd_spi_packet {
    uint8_t hdr;                
    uint8_t len;                
    uint8_t *pload;             
};

  
struct sd_spi_dev {
    SPI_HandleTypeDef       *spi;       
    struct sd_cbuf     *rx_buff;    
    enum sd_spi_rx_state    rx_state;   
    struct sd_spi_packet    *pkt;       
    enum sd_spi_state       state;      
    uint8_t         error;      
};
void sd_spi2_init(void);
enum sd_spi_error sd_spi_dev_init   (struct sd_spi_dev *dev,
                        SPI_HandleTypeDef *spi);
enum sd_spi_error sd_spi_rx_init    (struct sd_spi_dev *dev,
                        struct sd_cbuf *rx_buff);
void sd_spi_irqhandler          (struct sd_spi_dev *dev);
#ifdef __cplusplus
}
#endif
#else
#error "Multiple inclusion of sd_spi.h"
#endif /* __SD_SPI_H */

/*
 * END OF FILE [sd_spi.h]
 */