/*
* Function: spi_test
* Description: be used to test SPI related functions by using the AT450BXX module
*
* host slave
* MISO < - > MISO
* MOSI < - > MOSI
* CLK < - > CLK
* CE0/1 < - > CS
*/
void spi_test(void)
{
int num;
unsigned char wBuf = 0x3f;
unsigned char rBuf;
printf("--------------->Test SPI With AT450BXX<--------------\n");
bcm2835_spi_begin();
bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST); // The default
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0); // The default
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_64);
//bcm2835_spi_chipSelect(BCM2835_SPI_CS0);
//bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, HIGH);
bcm2835_gpio_fsel(PIN_CS, BCM2835_GPIO_FSEL_OUTP); /*set CS, and must be called*/
printf("SPI write 0x%x\n", wBuf);
ee_write(0,wBuf);
bcm2835_delay(50);
rBuf = ee_read(0);
printf("SPI read 0x%x\n", rBuf);
if(wBuf == rBuf)
{
printf("SPI interface work well !...\n");
}
else
{
printf("SPI interface work bad !...\n");
}
bcm2835_spi_end();
}
/**
* @brief Reads buffer of bytes from memory
* @param address : address of the first byte
* @param buff : pointer to a data buffer
* @param size : number of bytes to read
* @retval : None
*/
void ee_readBuff(uint32_t address,uint8_t *buff,uint16_t size){
uint16_t i;
disableInterrupts();
FLASH_Unlock(FLASH_MEMTYPE_DATA);
for (i=0;i<size;i++){
buff[i]=ee_read(address+i);
}
FLASH_Lock(FLASH_MEMTYPE_DATA);
enableInterrupts();
}
/*
* ee_read_short() - read a short (16 bit) word from EEPROM
*
* Data is stored in little endian format
*/
unsigned short ee_read_short(unsigned char addr) {
unsigned char byte_addr = addr;
unsigned short ret = ee_read(byte_addr++);
ret = ret | ((unsigned short)ee_read(byte_addr) << 8);
return ret;
}