Posted on October 02, 2015 at 15:51
Guys,
I tried to send data via SPI and DMA but can not get a proper data sent... I can't see CS up and down as well..... code:void Mp3WriteRegister(unsigned char addressbyte, unsigned char highbyte, unsigned char lowbyte)
{
Mp3DeselectData();
Mp3SelectControl(); //XCS = 0
uint8_t data6[4] = { 0x02, addressbyte, highbyte, lowbyte };
//uint8_t data6[4] = { VS_WRITE_COMMAND, addressbyte, highbyte, lowbyte };
HAL_SPI_Transmit_DMA(&hspi1,data6,4);
/*
SPIPutChar(VS_WRITE_COMMAND); //????????
SPIPutChar(addressbyte); //????????
SPIPutChar(highbyte); //????????8?
SPIPutChar(lowbyte); //????????8?
*/
Mp3DeselectControl();
}
Mp3WriteRegister(0x03,0xC0,0x00);
......................
/*
XCS = PA4
XDCS = PE8
XRESET = PE9
DREQ = PE7
XCS = NSS
*/
/**SPI1 GPIO Configuration
PA4 ------> SPI1_NSS
PA5 ------> SPI1_SCK
PA6 ------> SPI1_MISO
PA7 ------> SPI1_MOSI
#define Mp3SelectControl() { GPIOA->ODR &= ~MP3_XCS; }
#define Mp3DeselectControl() { GPIOA->ODR |= MP3_XCS; }
#define MP3_XDCS ( 1 <<
8
)
#define Mp3SelectData() { GPIOE->ODR &= ~MP3_XDCS; }
#define Mp3DeselectData() { GPIOE->ODR |= MP3_XDCS; }