void spiTest() {
int i, j;
csInit (); // Initialize chip select PC03
spiInit (SPI1);
for (i = 0; i < 8; i++) {
for (j = 0; j < 4; j++)
txbuf [j] = i*4 + j;
GPIO_WriteBit (GPIOE , GPIO_Pin_3 , 0);
spiReadWrite (SPI1 , rxbuf , txbuf , 4, SPI_SLOW );
GPIO_WriteBit (GPIOE , GPIO_Pin_3 , 1);
for (j = 0; j < 4; j++)
if (rxbuf [j] != txbuf [j])
assert_failed (__FILE__ , __LINE__ );
}
for (i = 0; i < 8; i++) {
for (j = 0; j < 4; j++)
txbuf16 [j] = i*4 + j + (i << 8);
GPIO_WriteBit (GPIOE , GPIO_Pin_3 , 0);
spiReadWrite16 (SPI1 , rxbuf16 , txbuf16 , 4, SPI_SLOW );
GPIO_WriteBit (GPIOE , GPIO_Pin_3 , 1);
for (j = 0; j < 4; j++)
if ( rxbuf16 [j] != txbuf16 [j])
assert_failed (__FILE__ , __LINE__ );
}
}
static void LcdWrite16( char dc, const uint16_t *data, int cnt )
{
GPIO_WriteBit(LCD_PORT,GPIO_PIN_DC, dc); // dc: 1 = data, 0 = control
GPIO_ResetBits(LCD_PORT,GPIO_PIN_SCE);
spiReadWrite16(SPILCD, 0, data, cnt, LCDSPEED);
GPIO_SetBits(LCD_PORT,GPIO_PIN_SCE);
}
int xchng_datablock(SPI_TypeDef *SPIx, int half, const void *tbuf, void *rbuf, unsigned count) {
if (count > 4) {
if (half) SPI_DataSizeConfig(SPI2, SPI_DataSize_16b);
if (!tbuf) {
dmaRcvBytes(SPI2, rbuf, count, half);
} else if (!rbuf) {
dmaTxBytes(SPI2, tbuf, count, half);
} else {
dmaExgBytes(SPI2, rbuf, tbuf, count, half);
}
SPI_DataSizeConfig(SPI2, SPI_DataSize_8b);
} else {
if (half) {
spiReadWrite16(SPI2, rbuf, tbuf, count, SPI_FAST);
} else {
spiReadWrite(SPI2 , rbuf, tbuf ,count , SPI_FAST);
}
}
}
