seesaw_spi.h

Go to the documentation of this file.

#ifndef SEESAW_SPI_H
#define SEESAW_SPI_H

#include "Adafruit_seesaw.h"

enum {
  SEESAW_SPI_STATUS = 0x00,   
  SEESAW_SPI_CONFIG = 0x01,   
  SEESAW_SPI_TRANSFER = 0x02, 
  SEESAW_SPI_READ = 0x03,     
  SEESAW_SPI_ABORT = 0x04,    
  SEESAW_SPI_CLOCK = 0x05,    
};
enum {
  SEESAW_SPI_BEGIN = 0x01,      
  SEESAW_SPI_END = 0x02,        
  SEESAW_SPI_DISCARD_RX = 0x04, 
};
enum {
  SEESAW_SPI_BUSY = 0x01,     
  SEESAW_SPI_READY = 0x02,    
  SEESAW_SPI_SELECTED = 0x04, 
  SEESAW_SPI_RX_READY = 0x08, 
  SEESAW_SPI_ERROR = 0x80,    
};
enum {
  SEESAW_SPI_OK = 0,         
  SEESAW_SPI_BAD_CONFIG = 1, 
  SEESAW_SPI_BAD_STATE = 2,  
  SEESAW_SPI_QUEUE_OVERFLOW = 3,   
  SEESAW_SPI_UNREAD_DATA = 4,      
  SEESAW_SPI_TRANSFER_FAILED = 5,  
  SEESAW_SPI_INVALID_COMMAND = 6,  
  SEESAW_SPI_PIN_CONFLICT = 7,     
  SEESAW_SPI_HOST_PROTOCOL = 0xFD, 
  SEESAW_SPI_HOST_TIMEOUT = 0xFE,  
  SEESAW_SPI_HOST_IO = 0xFF,       
};
const uint16_t SEESAW_SPI_TIMEOUT_MS =
    250; 
const uint8_t SEESAW_SPI_CHUNK_SIZE =
    29; 

class seesaw_SPI : public Adafruit_seesaw {
public:
  seesaw_SPI(TwoWire *wire = NULL);
  bool beginSPI(uint32_t frequency = 1000000, uint8_t mode = 0,
                bool lsbFirst = false);
  bool transfer(const uint8_t *tx, uint8_t *rx, size_t length,
                bool beginTransaction = true, bool endTransaction = true);
  bool abortSPI(bool releasePins = true);
  uint32_t getSPIClockFrequency();
  uint8_t getLastSPIError();

private:
  bool waitReady(uint8_t status[4]);
  bool transferFailed();
  uint8_t _lastSPIError =
      SEESAW_SPI_OK; 
};
#endif