uint8_t spi_transfer(uint8_t data)
{
SPI_CHECK_ENABLED_RESP(SPI2); //check if spi is enabled
SPI_WAIT(SPI2);
SPI2->DR = data;
SPI_WAIT(SPI2);
loop_until_bit_is_set(SPI2->SR,SPI_SR_RXNE); //wait to recieve data
return SPI2->DR;
}
uint16_t TM_SPI_Send16(SPI_TypeDef* SPIx, uint16_t data) {
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
/* Fill output buffer with data */
SPIx->DR = data;
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Return data from buffer */
return SPIx->DR;
}
static int
spi_bus_write
(
struct s3c2410_spi *device,
uint8_t cmd,
uint16_t data,
enum jbt_write_mode mode
)
{
int i;
uint16_t buf[3];
dprintf("%s: writing %2.2x : %4.4x (mode %d)\n",
__func__, cmd, data, mode);
switch (mode)
{
default:
printf("%s: warning! unknown spi write mode %d\n", __func__, mode);
return 1;
case JBT_WRITE_16:
buf[2] = JBT_DATA | (data & 0xff);
data >>= 8;
/* FALL THROUGH */
case JBT_WRITE_8:
buf[1] = JBT_DATA | (data & 0xff);
/* FALL THROUGH */
case JBT_WRITE_NODATA:
buf[0] = JBT_COMMAND | cmd;
break;
}
/* write data to reg */
spi_nCS(0); /* chip-select the slave */
for (i = 0; i < mode; i++)
{
dprintf("%s: writing byte %2.2x on wire\n", __func__, buf[i] & 0xff);
SPI_WAIT();
sptdat_set_txdata(buf[i] & 0xff);
dprintf("%s: writing byte %2.2x on wire\n", __func__, buf[i] >> 8);
SPI_WAIT();
sptdat_set_txdata(buf[i] >> 8);
}
spi_nCS(1); /* un-select the slave */
return 0;
}
void TM_SPI_ReadMulti16(SPI_TypeDef* SPIx, uint16_t* dataIn, uint16_t dummy, uint16_t count) {
uint16_t i;
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
for (i = 0; i < count; i++) {
/* Fill output buffer with data */
SPIx->DR = dummy;
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Save data to buffer */
dataIn[i] = SPIx->DR;
}
}
void TM_SPI_WriteMulti16(SPI_TypeDef* SPIx, uint16_t* dataOut, uint16_t count) {
uint16_t i;
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
for (i = 0; i < count; i++) {
/* Fill output buffer with data */
SPIx->DR = dataOut[i];
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Read data register */
SPIx->DR;
}
}
void SPI_Write_Block(uint8_t* data, uint8_t len)
{
uint8_t i;
for (i = 0; i < len; i++) {
SPDR = data[i];
SPI_WAIT();
}
}
void SPI_ReadWrite_Block(uint8_t* data, uint8_t* buffer, uint8_t len)
{
uint8_t i;
for (i = 0; i < len; i++) {
SPDR = data[i];
SPI_WAIT();
buffer[i] = SPDR;
}
}
uint8_t SPI_Send(SPI_TypeDef* SPIx, uint8_t data) {
/* Check if SPI is enabled */
SPI_CHECK_ENABLED_RESP(SPIx, 0);
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
/* Fill output buffer with data */
//SPIx->DR = data;
SPI_SendData8(SPIx, data);
/* Wait for transmission to complete */
SPI_WAIT(SPIx);
/* Return data from buffer */
//return SPIx->DR;
return SPI_ReceiveData8(SPIx);
}
void TM_SPI_SendMulti16(SPI_TypeDef* SPIx, uint16_t* dataOut, uint16_t* dataIn, uint32_t count) {
uint32_t i;
/* Check if SPI is enabled */
SPI_CHECK_ENABLED(SPIx);
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
for (i = 0; i < count; i++) {
/* Fill output buffer with data */
SPIx->DR = dataOut[i];
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Read data register */
dataIn[i] = SPIx->DR;
}
}
void SPI_WriteMulti(SPI_TypeDef* SPIx, uint8_t* dataOut, uint32_t count) {
uint32_t i;
/* Check if SPI is enabled */
SPI_CHECK_ENABLED(SPIx);
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
for (i = 0; i < count; i++) {
/* Fill output buffer with data */
//SPIx->DR = dataOut[i];
SPI_SendData8(SPIx, dataOut[i]);
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Read data register */
//(void)SPIx->DR;
SPI_ReceiveData8(SPIx);
}
}
void SPI_ReadMulti(SPI_TypeDef* SPIx, uint8_t* dataIn, uint8_t dummy, uint32_t count) {
uint32_t i;
/* Check if SPI is enabled */
SPI_CHECK_ENABLED(SPIx);
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
for (i = 0; i < count; i++) {
/* Fill output buffer with data */
//SPIx->DR = dummy;
SPI_SendData8(SPIx, dummy);
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Save data to buffer */
//dataIn[i] = SPIx->DR;
dataIn[i] = SPI_ReceiveData8(SPIx);
}
}
void TM_SPI_ReadMulti(SPI_TypeDef* SPIx, uint8_t* dataIn, uint8_t dummy, uint32_t count) {
uint32_t i;
/* Check if SPI is enabled */
if (!((SPIx)->CR1 & SPI_CR1_SPE)) {
return;
}
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
for (i = 0; i < count; i++) {
/* Fill output buffer with data */
SPIx->DR = dummy;
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Save data to buffer */
dataIn[i] = SPIx->DR;
}
}
void TM_SPI_WriteMulti(SPI_TypeDef* SPIx, uint8_t* dataOut, uint32_t count) {
uint32_t i;
/* Check if SPI is enabled */
if (!((SPIx)->CR1 & SPI_CR1_SPE)) {
return;
}
/* Wait for previous transmissions to complete if DMA TX enabled for SPI */
SPI_WAIT(SPIx);
for (i = 0; i < count; i++) {
/* Fill output buffer with data */
SPIx->DR = dataOut[i];
/* Wait for SPI to end everything */
SPI_WAIT(SPIx);
/* Read data register */
(void)SPIx->DR;
}
}
uint8_t SPI_Write_Byte(uint8_t byte)
{
SPDR = byte;
SPI_WAIT();
return SPDR;
}
static uint8_t max1168_xfer_byte(uint8_t tx)
{
SPDR = tx;
SPI_WAIT();
return SPDR;
}