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Merge pull request #312 from victorpv/SPI-Callbacks 

Added Spi callbacks from @victorpv
This commit is contained in:
Roger Clark 2017-07-16 08:54:18 +10:00 committed by GitHub
parent 0f3c6e5854 910072c7db
commit b5eadb8409
2 changed files with 459 additions and 276 deletions
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654
STM32F1/libraries/SPI/src/SPI.cpp
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@ -94,76 +94,85 @@ static const spi_pins board_spi_pins[] __FLASH__ = {
SPIClass::SPIClass(uint32 spi_num) {
_currentSetting=&_settings[spi_num-1];// SPI channels are called 1 2 and 3 but the array is zero indexed
_currentSetting=&_settings[spi_num-1];// SPI channels are called 1 2 and 3 but the array is zero indexed
switch (spi_num) {
#if BOARD_NR_SPI >= 1
case 1:
_currentSetting->spi_d = SPI1;
_spi1_this = (void*) this;
break;
#endif
#if BOARD_NR_SPI >= 2
case 2:
_currentSetting->spi_d = SPI2;
_spi2_this = (void*) this;
break;
#endif
#if BOARD_NR_SPI >= 3
case 3:
_currentSetting->spi_d = SPI3;
_spi3_this = (void*) this;
break;
#endif
default:
ASSERT(0);
}
// Init things specific to each SPI device
// clock divider setup is a bit of hack, and needs to be improved at a later date.
_settings[0].spi_d = SPI1;
_settings[0].clockDivider = determine_baud_rate(_settings[0].spi_d, _settings[0].clock);
_settings[0].spiDmaDev = DMA1;
_settings[0].spiTxDmaChannel = DMA_CH3;
_settings[0].spiRxDmaChannel = DMA_CH2;
_settings[1].spi_d = SPI2;
_settings[1].clockDivider = determine_baud_rate(_settings[1].spi_d, _settings[1].clock);
_settings[1].spiDmaDev = DMA1;
_settings[1].spiTxDmaChannel = DMA_CH5;
_settings[1].spiRxDmaChannel = DMA_CH4;
// Init things specific to each SPI device
// clock divider setup is a bit of hack, and needs to be improved at a later date.
_settings[0].spi_d = SPI1;
_settings[0].clockDivider = determine_baud_rate(_settings[0].spi_d, _settings[0].clock);
_settings[0].spiDmaDev = DMA1;
_settings[0].spiTxDmaChannel = DMA_CH3;
_settings[0].spiRxDmaChannel = DMA_CH2;
_settings[1].spi_d = SPI2;
_settings[1].clockDivider = determine_baud_rate(_settings[1].spi_d, _settings[1].clock);
_settings[1].spiDmaDev = DMA1;
_settings[1].spiTxDmaChannel = DMA_CH5;
_settings[1].spiRxDmaChannel = DMA_CH4;
#if BOARD_NR_SPI >= 3
_settings[2].spi_d = SPI3;
_settings[2].clockDivider = determine_baud_rate(_settings[2].spi_d, _settings[2].clock);
_settings[2].spiDmaDev = DMA2;
_settings[2].spiTxDmaChannel = DMA_CH2;
_settings[2].spiRxDmaChannel = DMA_CH1;
_settings[2].spi_d = SPI3;
_settings[2].clockDivider = determine_baud_rate(_settings[2].spi_d, _settings[2].clock);
_settings[2].spiDmaDev = DMA2;
_settings[2].spiTxDmaChannel = DMA_CH2;
_settings[2].spiRxDmaChannel = DMA_CH1;
#endif
// added for DMA callbacks.
_currentSetting->state = SPI_STATE_IDLE;
}
/*
* Set up/tear down
*/
void SPIClass::updateSettings(void) {
uint32 flags = ((_currentSetting->bitOrder == MSBFIRST ? SPI_FRAME_MSB : SPI_FRAME_LSB) | _currentSetting->dataSize | SPI_SW_SLAVE | SPI_SOFT_SS);
#ifdef SPI_DEBUG
Serial.print("spi_master_enable("); Serial.print(_currentSetting->clockDivider); Serial.print(","); Serial.print(_currentSetting->dataMode); Serial.print(","); Serial.print(flags); Serial.println(")");
#endif
spi_master_enable(_currentSetting->spi_d, (spi_baud_rate)_currentSetting->clockDivider, (spi_mode)_currentSetting->dataMode, flags);
uint32 flags = ((_currentSetting->bitOrder == MSBFIRST ? SPI_FRAME_MSB : SPI_FRAME_LSB) | _currentSetting->dataSize | SPI_SW_SLAVE | SPI_SOFT_SS);
#ifdef SPI_DEBUG
Serial.print("spi_master_enable("); Serial.print(_currentSetting->clockDivider); Serial.print(","); Serial.print(_currentSetting->dataMode); Serial.print(","); Serial.print(flags); Serial.println(")");
#endif
spi_master_enable(_currentSetting->spi_d, (spi_baud_rate)_currentSetting->clockDivider, (spi_mode)_currentSetting->dataMode, flags);
}
void SPIClass::begin(void) {
spi_init(_currentSetting->spi_d);
configure_gpios(_currentSetting->spi_d, 1);
updateSettings();
// added for DMA callbacks.
_currentSetting->state = SPI_STATE_READY;
}
void SPIClass::beginSlave(void) {
spi_init(_currentSetting->spi_d);
configure_gpios(_currentSetting->spi_d, 0);
uint32 flags = ((_currentSetting->bitOrder == MSBFIRST ? SPI_FRAME_MSB : SPI_FRAME_LSB) | _currentSetting->dataSize | SPI_RX_ONLY);
#ifdef SPI_DEBUG
Serial.print("spi_slave_enable("); Serial.print(_currentSetting->dataMode); Serial.print(","); Serial.print(flags); Serial.println(")");
#endif
#ifdef SPI_DEBUG
Serial.print("spi_slave_enable("); Serial.print(_currentSetting->dataMode); Serial.print(","); Serial.print(flags); Serial.println(")");
#endif
spi_slave_enable(_currentSetting->spi_d, (spi_mode)_currentSetting->dataMode, flags);
// added for DMA callbacks.
_currentSetting->state = SPI_STATE_READY;
}
void SPIClass::end(void) {
@ -182,28 +191,31 @@ void SPIClass::end(void) {
while (spi_is_busy(_currentSetting->spi_d))
;
spi_peripheral_disable(_currentSetting->spi_d);
// added for DMA callbacks.
// Need to add unsetting the callbacks for the DMA channels.
_currentSetting->state = SPI_STATE_IDLE;
}
/* Roger Clark added 3 functions */
void SPIClass::setClockDivider(uint32_t clockDivider)
{
#ifdef SPI_DEBUG
Serial.print("Clock divider set to "); Serial.println(clockDivider);
#endif
_currentSetting->clockDivider = clockDivider;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_BR);
_currentSetting->spi_d->regs->CR1 = cr1 | (clockDivider & SPI_CR1_BR);
#ifdef SPI_DEBUG
Serial.print("Clock divider set to "); Serial.println(clockDivider);
#endif
_currentSetting->clockDivider = clockDivider;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_BR);
_currentSetting->spi_d->regs->CR1 = cr1 | (clockDivider & SPI_CR1_BR);
}
void SPIClass::setBitOrder(BitOrder bitOrder)
{
#ifdef SPI_DEBUG
Serial.print("Bit order set to "); Serial.println(bitOrder);
#endif
_currentSetting->bitOrder = bitOrder;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_LSBFIRST);
if ( bitOrder==LSBFIRST ) cr1 |= SPI_CR1_LSBFIRST;
_currentSetting->spi_d->regs->CR1 = cr1;
#ifdef SPI_DEBUG
Serial.print("Bit order set to "); Serial.println(bitOrder);
#endif
_currentSetting->bitOrder = bitOrder;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_LSBFIRST);
if ( bitOrder==LSBFIRST ) cr1 |= SPI_CR1_LSBFIRST;
_currentSetting->spi_d->regs->CR1 = cr1;
}
/* Victor Perez. Added to test changing datasize from 8 to 16 bit modes on the fly.
@ -212,11 +224,11 @@ void SPIClass::setBitOrder(BitOrder bitOrder)
*/
void SPIClass::setDataSize(uint32 datasize)
{
_currentSetting->dataSize = datasize;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_DFF);
uint8 en = spi_is_enabled(_currentSetting->spi_d);
spi_peripheral_disable(_currentSetting->spi_d);
_currentSetting->spi_d->regs->CR1 = cr1 | (datasize & SPI_CR1_DFF) | en;
_currentSetting->dataSize = datasize;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_DFF);
uint8 en = spi_is_enabled(_currentSetting->spi_d);
spi_peripheral_disable(_currentSetting->spi_d);
_currentSetting->spi_d->regs->CR1 = cr1 | (datasize & SPI_CR1_DFF) | en;
}
void SPIClass::setDataMode(uint8_t dataMode)
@ -246,56 +258,56 @@ bit 0 - CPHA : Clock phase
If someone finds this is not the case or sees a logic error with this let me know ;-)
*/
#ifdef SPI_DEBUG
Serial.print("Data mode set to "); Serial.println(dataMode);
#endif
_currentSetting->dataMode = dataMode;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_CPOL|SPI_CR1_CPHA);
_currentSetting->spi_d->regs->CR1 = cr1 | (dataMode & (SPI_CR1_CPOL|SPI_CR1_CPHA));
#ifdef SPI_DEBUG
Serial.print("Data mode set to "); Serial.println(dataMode);
#endif
_currentSetting->dataMode = dataMode;
uint32 cr1 = _currentSetting->spi_d->regs->CR1 & ~(SPI_CR1_CPOL|SPI_CR1_CPHA);
_currentSetting->spi_d->regs->CR1 = cr1 | (dataMode & (SPI_CR1_CPOL|SPI_CR1_CPHA));
}
void SPIClass::beginTransaction(uint8_t pin, SPISettings settings)
{
#ifdef SPI_DEBUG
Serial.println("SPIClass::beginTransaction");
#endif
setBitOrder(settings.bitOrder);
setDataMode(settings.dataMode);
setDataSize(settings.dataSize);
setClockDivider(determine_baud_rate(_currentSetting->spi_d, settings.clock));
begin();
#ifdef SPI_DEBUG
Serial.println("SPIClass::beginTransaction");
#endif
setBitOrder(settings.bitOrder);
setDataMode(settings.dataMode);
setDataSize(settings.dataSize);
setClockDivider(determine_baud_rate(_currentSetting->spi_d, settings.clock));
begin();
}
void SPIClass::beginTransactionSlave(SPISettings settings)
{
#ifdef SPI_DEBUG
Serial.println(F("SPIClass::beginTransactionSlave"));
#endif
setBitOrder(settings.bitOrder);
setDataMode(settings.dataMode);
setDataSize(settings.dataSize);
beginSlave();
#ifdef SPI_DEBUG
Serial.println(F("SPIClass::beginTransactionSlave"));
#endif
setBitOrder(settings.bitOrder);
setDataMode(settings.dataMode);
setDataSize(settings.dataSize);
beginSlave();
}
void SPIClass::endTransaction(void)
{
#ifdef SPI_DEBUG
Serial.println("SPIClass::endTransaction");
#endif
//digitalWrite(_SSPin,HIGH);
#ifdef SPI_DEBUG
Serial.println("SPIClass::endTransaction");
#endif
//digitalWrite(_SSPin,HIGH);
#if false
// code from SAM core
uint8_t mode = interruptMode;
if (mode > 0) {
if (mode < 16) {
if (mode & 1) PIOA->PIO_IER = interruptMask[0];
if (mode & 2) PIOB->PIO_IER = interruptMask[1];
if (mode & 4) PIOC->PIO_IER = interruptMask[2];
if (mode & 8) PIOD->PIO_IER = interruptMask[3];
} else {
if (interruptSave) interrupts();
}
}
uint8_t mode = interruptMode;
if (mode > 0) {
if (mode < 16) {
if (mode & 1) PIOA->PIO_IER = interruptMask[0];
if (mode & 2) PIOB->PIO_IER = interruptMask[1];
if (mode & 4) PIOC->PIO_IER = interruptMask[2];
if (mode & 8) PIOD->PIO_IER = interruptMask[3];
} else {
if (interruptSave) interrupts();
}
}
#endif
}
@ -306,80 +318,139 @@ void SPIClass::endTransaction(void)
uint16 SPIClass::read(void)
{
while ( spi_is_rx_nonempty(_currentSetting->spi_d)==0 ) ;
return (uint16)spi_rx_reg(_currentSetting->spi_d);
while ( spi_is_rx_nonempty(_currentSetting->spi_d)==0 ) ;
return (uint16)spi_rx_reg(_currentSetting->spi_d);
}
void SPIClass::read(uint8 *buf, uint32 len)
{
if ( len == 0 ) return;
spi_rx_reg(_currentSetting->spi_d); // clear the RX buffer in case a byte is waiting on it.
spi_reg_map * regs = _currentSetting->spi_d->regs;
// start sequence: write byte 0
regs->DR = 0x00FF; // write the first byte
// main loop
while ( (--len) ) {
while( !(regs->SR & SPI_SR_TXE) ); // wait for TXE flag
noInterrupts(); // go atomic level - avoid interrupts to surely get the previously received data
regs->DR = 0x00FF; // write the next data item to be transmitted into the SPI_DR register. This clears the TXE flag.
while ( !(regs->SR & SPI_SR_RXNE) ); // wait till data is available in the DR register
*buf++ = (uint8)(regs->DR); // read and store the received byte. This clears the RXNE flag.
interrupts(); // let systick do its job
}
// read remaining last byte
while ( !(regs->SR & SPI_SR_RXNE) ); // wait till data is available in the Rx register
*buf++ = (uint8)(regs->DR); // read and store the received byte
if ( len == 0 ) return;
spi_rx_reg(_currentSetting->spi_d); // clear the RX buffer in case a byte is waiting on it.
spi_reg_map * regs = _currentSetting->spi_d->regs;
// start sequence: write byte 0
regs->DR = 0x00FF; // write the first byte
// main loop
while ( (--len) ) {
while( !(regs->SR & SPI_SR_TXE) ); // wait for TXE flag
noInterrupts(); // go atomic level - avoid interrupts to surely get the previously received data
regs->DR = 0x00FF; // write the next data item to be transmitted into the SPI_DR register. This clears the TXE flag.
while ( !(regs->SR & SPI_SR_RXNE) ); // wait till data is available in the DR register
*buf++ = (uint8)(regs->DR); // read and store the received byte. This clears the RXNE flag.
interrupts(); // let systick do its job
}
// read remaining last byte
while ( !(regs->SR & SPI_SR_RXNE) ); // wait till data is available in the Rx register
*buf++ = (uint8)(regs->DR); // read and store the received byte
}
void SPIClass::write(uint16 data)
{
/* Added for 16bit data Victor Perez. Roger Clark
* Improved speed by just directly writing the single byte to the SPI data reg and wait for completion,
* by taking the Tx code from transfer(byte)
* This almost doubles the speed of this function.
*/
spi_tx_reg(_currentSetting->spi_d, data); // write the data to be transmitted into the SPI_DR register (this clears the TXE flag)
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
/* Added for 16bit data Victor Perez. Roger Clark
* Improved speed by just directly writing the single byte to the SPI data reg and wait for completion,
* by taking the Tx code from transfer(byte)
* This almost doubles the speed of this function.
*/
spi_tx_reg(_currentSetting->spi_d, data); // write the data to be transmitted into the SPI_DR register (this clears the TXE flag)
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
}
void SPIClass::write(uint16 data, uint32 n)
{
// Added by stevstrong: Repeatedly send same data by the specified number of times
spi_reg_map * regs = _currentSetting->spi_d->regs;
while ( (n--)>0 ) {
regs->DR = data; // write the data to be transmitted into the SPI_DR register (this clears the TXE flag)
while ( (regs->SR & SPI_SR_TXE)==0 ) ; // wait till Tx empty
}
while ( (regs->SR & SPI_SR_BSY) != 0); // wait until BSY=0 before returning
// Added by stevstrong: Repeatedly send same data by the specified number of times
spi_reg_map * regs = _currentSetting->spi_d->regs;
while ( (n--)>0 ) {
regs->DR = data; // write the data to be transmitted into the SPI_DR register (this clears the TXE flag)
while ( (regs->SR & SPI_SR_TXE)==0 ) ; // wait till Tx empty
}
while ( (regs->SR & SPI_SR_BSY) != 0); // wait until BSY=0 before returning
}
void SPIClass::write(void *data, uint32 length)
{
spi_dev * spi_d = _currentSetting->spi_d;
spi_tx(spi_d, (void*)data, length); // data can be array of bytes or words
while (spi_is_tx_empty(spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
spi_dev * spi_d = _currentSetting->spi_d;
spi_tx(spi_d, (void*)data, length); // data can be array of bytes or words
while (spi_is_tx_empty(spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
}
uint8 SPIClass::transfer(uint8 byte) const
{
spi_dev * spi_d = _currentSetting->spi_d;
spi_rx_reg(spi_d); // read any previous data
spi_tx_reg(spi_d, byte); // Write the data item to be transmitted into the SPI_DR register
while (spi_is_tx_empty(spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
return (uint8)spi_rx_reg(spi_d); // "... and read the last received data."
spi_dev * spi_d = _currentSetting->spi_d;
spi_rx_reg(spi_d); // read any previous data
spi_tx_reg(spi_d, byte); // Write the data item to be transmitted into the SPI_DR register
while (spi_is_tx_empty(spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
return (uint8)spi_rx_reg(spi_d); // "... and read the last received data."
}
uint16_t SPIClass::transfer16(uint16_t wr_data) const
{
spi_dev * spi_d = _currentSetting->spi_d;
spi_rx_reg(spi_d); // read any previous data
spi_tx_reg(spi_d, wr_data); // "2. Write the first data item to be transmitted into the SPI_DR register (this clears the TXE flag)."
while (spi_is_tx_empty(spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
return (uint16)spi_rx_reg(spi_d); // "... and read the last received data."
spi_dev * spi_d = _currentSetting->spi_d;
spi_rx_reg(spi_d); // read any previous data
spi_tx_reg(spi_d, wr_data); // "2. Write the first data item to be transmitted into the SPI_DR register (this clears the TXE flag)."
while (spi_is_tx_empty(spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
return (uint16)spi_rx_reg(spi_d); // "... and read the last received data."
}
/* Roger Clark and Victor Perez, 2015
* Performs a DMA SPI transfer with at least a receive buffer.
* If a TX buffer is not provided, FF is sent over and over for the lenght of the transfer.
* On exit TX buffer is not modified, and RX buffer cotains the received data.
* Still in progress.
*/
void SPIClass::dmaTransferSet(void *transmitBuf, void *receiveBuf) {
dma_init(_currentSetting->spiDmaDev);
//spi_rx_dma_enable(_currentSetting->spi_d);
//spi_tx_dma_enable(_currentSetting->spi_d);
dma_xfer_size dma_bit_size = (_currentSetting->dataSize==DATA_SIZE_16BIT) ? DMA_SIZE_16BITS : DMA_SIZE_8BITS;
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
receiveBuf, dma_bit_size, (DMA_MINC_MODE | DMA_TRNS_CMPLT ));// receive buffer DMA
if (!transmitBuf) {
transmitBuf = &ff;
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
transmitBuf, dma_bit_size, (DMA_FROM_MEM));// Transmit FF repeatedly
}
else {
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
transmitBuf, dma_bit_size, (DMA_MINC_MODE | DMA_FROM_MEM ));// Transmit buffer DMA
}
dma_set_priority(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, DMA_PRIORITY_LOW);
dma_set_priority(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, DMA_PRIORITY_VERY_HIGH);
}
uint8 SPIClass::dmaTransferRepeat(uint16 length) {
if (length == 0) return 0;
if (spi_is_rx_nonempty(_currentSetting->spi_d) == 1) spi_rx_reg(_currentSetting->spi_d);
_currentSetting->state = SPI_STATE_TRANSFER;
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, length);
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, length);
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel);// enable receive
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);// enable transmit
spi_rx_dma_enable(_currentSetting->spi_d);
spi_tx_dma_enable(_currentSetting->spi_d);
if (_currentSetting->receiveCallback){
return 0;
}
//uint32_t m = millis();
uint8 b = 0;
uint32_t m = millis();
while ((dma_get_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel) & DMA_ISR_TCIF1)==0) {
//Avoid interrupts and just loop waiting for the flag to be set.
if ((millis() - m) > DMA_TIMEOUT) { b = 2; break; }
}
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
spi_tx_dma_disable(_currentSetting->spi_d);
spi_rx_dma_disable(_currentSetting->spi_d);
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel);
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel);
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
_currentSetting->state = SPI_STATE_READY;
return b;
}
/* Roger Clark and Victor Perez, 2015
@ -388,51 +459,10 @@ uint16_t SPIClass::transfer16(uint16_t wr_data) const
* On exit TX buffer is not modified, and RX buffer contains the received data.
* Still in progress.
*/
uint8 SPIClass::dmaTransfer(void * transmitBuf, void * receiveBuf, uint16 length)
{
if (length == 0) return 0;
uint8 b = 0;
// dma1_ch3_Active=true;
dma_init(_currentSetting->spiDmaDev);
// dma_attach_interrupt(DMA1, DMA_CH3, &SPIClass::DMA1_CH3_Event);
// RX
dma_xfer_size dma_bit_size = (_currentSetting->dataSize==DATA_SIZE_16BIT) ? DMA_SIZE_16BITS : DMA_SIZE_8BITS;
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
receiveBuf, dma_bit_size, (DMA_MINC_MODE));// receive buffer DMA
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, length);
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel);// enable receive
// TX
uint32 flags = (DMA_MINC_MODE | DMA_FROM_MEM);
if ( transmitBuf==0 ) {
static uint8_t ff = 0XFF;
transmitBuf = &ff;
flags ^= DMA_MINC_MODE; // remove increment mode
}
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
transmitBuf, dma_bit_size, flags);// Transmit buffer DMA
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, length);
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);// enable transmit
spi_rx_reg(_currentSetting->spi_d); //Clear the RX buffer in case a byte is waiting on it.
spi_rx_dma_enable(_currentSetting->spi_d);
spi_tx_dma_enable(_currentSetting->spi_d); // must be the last enable to avoid DMA error flag
uint32_t m = millis();
while ((dma_get_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel) & DMA_ISR_TCIF1)==0) {//Avoid interrupts and just loop waiting for the flag to be set.
//delayMicroseconds(10);
if ((millis() - m) > DMA_TIMEOUT) { b = 2; break; }
}
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
spi_tx_dma_disable(_currentSetting->spi_d);
spi_rx_dma_disable(_currentSetting->spi_d); // And disable generation of DMA request from the SPI port so other peripherals can use the channels
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel);
return b;
uint8 SPIClass::dmaTransfer(void *transmitBuf, void *receiveBuf, uint16 length) {
dmaTransferSet(transmitBuf, receiveBuf);
return dmaTransferRepeat(length);
}
/* Roger Clark and Victor Perez, 2015
@ -441,82 +471,184 @@ uint8 SPIClass::dmaTransfer(void * transmitBuf, void * receiveBuf, uint16 length
* Still in progress.
* 2016 - stevstrong - reworked to automatically detect bit size from SPI setting
*/
uint8 SPIClass::dmaSend(void * transmitBuf, uint16 length, bool minc)
{
if (length == 0) return 0;
uint32 flags = ( (DMA_MINC_MODE*minc) | DMA_FROM_MEM | DMA_TRNS_CMPLT);
uint8 b = 0;
dma_init(_currentSetting->spiDmaDev);
// TX
dma_xfer_size dma_bit_size = (_currentSetting->dataSize==DATA_SIZE_16BIT) ? DMA_SIZE_16BITS : DMA_SIZE_8BITS;
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
transmitBuf, dma_bit_size, flags);// Transmit buffer DMA
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, length);
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);// enable transmit
spi_tx_dma_enable(_currentSetting->spi_d);
void SPIClass::dmaSendSet(void * transmitBuf, bool minc) {
uint32 flags = ( (DMA_MINC_MODE*minc) | DMA_FROM_MEM | DMA_TRNS_CMPLT);
dma_init(_currentSetting->spiDmaDev);
dma_xfer_size dma_bit_size = (_currentSetting->dataSize==DATA_SIZE_16BIT) ? DMA_SIZE_16BITS : DMA_SIZE_8BITS;
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
transmitBuf, dma_bit_size, flags);// Transmit buffer DMA
dma_set_priority(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, DMA_PRIORITY_LOW);
}
uint8 SPIClass::dmaSendRepeat(uint16 length) {
if (length == 0) return 0;
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, length);
_currentSetting->state = SPI_STATE_TRANSMIT;
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);// enable transmit
spi_tx_dma_enable(_currentSetting->spi_d);
if (_currentSetting->transmitCallback)
{
return 0;
}
uint32_t m = millis();
while ((dma_get_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel) & DMA_ISR_TCIF1)==0) {//Avoid interrupts and just loop waiting for the flag to be set.
//delayMicroseconds(10);
if ((millis() - m) > DMA_TIMEOUT) { b = 2; break; }
uint8 b = 0;
while ((dma_get_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel) & DMA_ISR_TCIF1)==0) {
//Avoid interrupts and just loop waiting for the flag to be set.
if ((millis() - m) > DMA_TIMEOUT) { b = 2; break; }
}
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
spi_tx_dma_disable(_currentSetting->spi_d);
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
_currentSetting->state = SPI_STATE_READY;
return b;
}
uint8 SPIClass::dmaSend(void * transmitBuf, uint16 length, bool minc) {
dmaSendSet(transmitBuf, minc);
return dmaSendRepeat(length);
}
uint8 SPIClass::dmaSendAsync(void * transmitBuf, uint16 length, bool minc) {
uint8 b = 0;
if (_currentSetting->state != SPI_STATE_READY)
{
uint32_t m = millis();
while ((dma_get_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel) & DMA_ISR_TCIF1)==0) {//Avoid interrupts and just loop waiting for the flag to be set.
//delayMicroseconds(10);
if ((millis() - m) > DMA_TIMEOUT) { b = 2; break; }
}
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
spi_tx_dma_disable(_currentSetting->spi_d);
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
_currentSetting->state = SPI_STATE_READY;
}
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
spi_tx_dma_disable(_currentSetting->spi_d);
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
return b;
}
uint8 SPIClass::dmaSendAsync(void * transmitBuf, uint16 length, bool minc)
{
static bool isRunning=false;
uint8 b = 0;
if (isRunning)
{
uint32_t m = millis();
while ((dma_get_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel) & DMA_ISR_TCIF1)==0) {//Avoid interrupts and just loop waiting for the flag to be set.
//delayMicroseconds(10);
if ((millis() - m) > DMA_TIMEOUT) { b = 2; break; }
}
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0 before disabling the SPI."
spi_tx_dma_disable(_currentSetting->spi_d);
dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
isRunning=false;
}
if (length == 0) return 0;
uint32 flags = ( (DMA_MINC_MODE*minc) | DMA_FROM_MEM | DMA_TRNS_CMPLT);
if (length == 0) return 0;
uint32 flags = ( (DMA_MINC_MODE*minc) | DMA_FROM_MEM | DMA_TRNS_CMPLT);
dma_init(_currentSetting->spiDmaDev);
// TX
dma_xfer_size dma_bit_size = (_currentSetting->dataSize==DATA_SIZE_16BIT) ? DMA_SIZE_16BITS : DMA_SIZE_8BITS;
// TX
dma_xfer_size dma_bit_size = (_currentSetting->dataSize==DATA_SIZE_16BIT) ? DMA_SIZE_16BITS : DMA_SIZE_8BITS;
dma_setup_transfer(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &_currentSetting->spi_d->regs->DR, dma_bit_size,
transmitBuf, dma_bit_size, flags);// Transmit buffer DMA
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, length);
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);// enable transmit
spi_tx_dma_enable(_currentSetting->spi_d);
transmitBuf, dma_bit_size, flags);// Transmit buffer DMA
dma_set_num_transfers(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, length);
dma_clear_isr_bits(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
dma_enable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);// enable transmit
spi_tx_dma_enable(_currentSetting->spi_d);
isRunning=true;
_currentSetting->state = SPI_STATE_TRANSMIT;
return b;
return b;
}
/*
New functions added to manage callbacks.
Victor Perez 2017
*/
void SPIClass::onReceive(void(*callback)(void)) {
_currentSetting->receiveCallback = callback;
if (callback){
switch (_currentSetting->spi_d->clk_id) {
case RCC_SPI1:
dma_attach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, &SPIClass::_spi1EventCallback);
break;
case RCC_SPI2:
dma_attach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, &SPIClass::_spi2EventCallback);
break;
#if BOARD_NR_SPI >= 3
case RCC_SPI3:
dma_attach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel, &SPIClass::_spi3EventCallback);
break;
#endif
default:
ASSERT(0);
}
}
else {
dma_detach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel);
}
}
void SPIClass::onTransmit(void(*callback)(void)) {
_currentSetting->transmitCallback = callback;
if (callback){
switch (_currentSetting->spi_d->clk_id) {
case RCC_SPI1:
dma_attach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &SPIClass::_spi1EventCallback);
break;
case RCC_SPI2:
dma_attach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &SPIClass::_spi2EventCallback);
break;
#if BOARD_NR_SPI >= 3
case RCC_SPI3:
dma_attach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel, &SPIClass::_spi3EventCallback);
break;
#endif
default:
ASSERT(0);
}
}
else {
dma_detach_interrupt(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
}
}
/*
TODO: check if better to first call the customer code, next disable the DMA requests.
Also see if we need to check whether callbacks are set or not, may be better to be checked during the initial setup and only set the callback to EventCallback if they are set.
*/
void SPIClass::EventCallback() {
while (spi_is_tx_empty(_currentSetting->spi_d) == 0); // "5. Wait until TXE=1 ..."
while (spi_is_busy(_currentSetting->spi_d) != 0); // "... and then wait until BSY=0"
switch (_currentSetting->state) {
case SPI_STATE_TRANSFER:
while (spi_is_rx_nonempty(_currentSetting->spi_d));
_currentSetting->state = SPI_STATE_READY;
spi_tx_dma_disable(_currentSetting->spi_d);
spi_rx_dma_disable(_currentSetting->spi_d);
//dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
//dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiRxDmaChannel);
if (_currentSetting->receiveCallback)
{
_currentSetting->receiveCallback();
}
break;
case SPI_STATE_TRANSMIT:
_currentSetting->state = SPI_STATE_READY;
spi_tx_dma_disable(_currentSetting->spi_d);
//dma_disable(_currentSetting->spiDmaDev, _currentSetting->spiTxDmaChannel);
if (_currentSetting->transmitCallback)
{
_currentSetting->transmitCallback();
}
break;
default:
// we shouldn't get here, so better to add an assert and fail.
return;
}
}
void SPIClass::attachInterrupt(void) {
// Should be enableInterrupt()
// Should be enableInterrupt()
}
void SPIClass::detachInterrupt(void) {
// Should be disableInterrupt()
// Should be disableInterrupt()
}
/*
@ -557,10 +689,26 @@ uint8 SPIClass::recv(void) {
return this->read();
}
/*
* Auxiliary functions
*/
DMA call back functions, one per port.
*/
void SPIClass::_spi1EventCallback()
{
reinterpret_cast<class SPIClass*>(_spi1_this)->EventCallback();
}
void SPIClass::_spi2EventCallback() {
reinterpret_cast<class SPIClass*>(_spi2_this)->EventCallback();
}
#if BOARD_NR_SPI >= 3
void SPIClass::_spi3EventCallback() {
reinterpret_cast<class SPIClass*>(_spi3_this)->EventCallback();
}
#endif
/*
* Auxiliary functions
*/
static const spi_pins* dev_to_spi_pins(spi_dev *dev) {
switch (dev->clk_id) {
@ -601,8 +749,8 @@ static void configure_gpios(spi_dev *dev, bool as_master) {
disable_pwm(mosii);
spi_config_gpios(dev, as_master, nssi->gpio_device, nssi->gpio_bit,
scki->gpio_device, scki->gpio_bit, misoi->gpio_bit,
mosii->gpio_bit);
scki->gpio_device, scki->gpio_bit, misoi->gpio_bit,
mosii->gpio_bit);
}
static const spi_baud_rate baud_rates[8] __FLASH__ = {
@ -617,26 +765,26 @@ static const spi_baud_rate baud_rates[8] __FLASH__ = {
};
/*
* Note: This assumes you're on a LeafLabs-style board
* (CYCLES_PER_MICROSECOND == 72, APB2 at 72MHz, APB1 at 36MHz).
*/
* Note: This assumes you're on a LeafLabs-style board
* (CYCLES_PER_MICROSECOND == 72, APB2 at 72MHz, APB1 at 36MHz).
*/
static spi_baud_rate determine_baud_rate(spi_dev *dev, uint32_t freq) {
uint32_t clock = 0, i;
#ifdef SPI_DEBUG
Serial.print("determine_baud_rate("); Serial.print(freq); Serial.println(")");
#endif
uint32_t clock = 0, i;
#ifdef SPI_DEBUG
Serial.print("determine_baud_rate("); Serial.print(freq); Serial.println(")");
#endif
switch (rcc_dev_clk(dev->clk_id))
{
case RCC_APB2: clock = STM32_PCLK2; break; // 72 Mhz
case RCC_APB1: clock = STM32_PCLK1; break; // 36 Mhz
case RCC_APB2: clock = STM32_PCLK2; break; // 72 Mhz
case RCC_APB1: clock = STM32_PCLK1; break; // 36 Mhz
}
clock /= 2;
i = 0;
while (i < 7 && freq < clock) {
clock /= 2;
i++;
clock /= 2;
i++;
}
return baud_rates[i];
return baud_rates[i];
}
SPIClass SPI(1);

81
STM32F1/libraries/SPI/src/SPI.h
View File

@ -99,6 +99,13 @@
#define DATA_SIZE_8BIT SPI_CR1_DFF_8_BIT
#define DATA_SIZE_16BIT SPI_CR1_DFF_16_BIT
typedef enum {
SPI_STATE_IDLE,
SPI_STATE_READY,
SPI_STATE_RECEIVE,
SPI_STATE_TRANSMIT,
SPI_STATE_TRANSFER
} spi_mode_t;
class SPISettings {
public:
SPISettings(uint32_t clock, BitOrder bitOrder, uint8_t dataMode) {
@ -134,21 +141,31 @@ private:
this->dataSize = dataSize;
}
uint32_t clock;
uint32_t dataSize;
uint32_t clockDivider;
BitOrder bitOrder;
uint8_t dataMode;
uint32_t dataSize;
uint8_t _SSPin;
volatile spi_mode_t state;
spi_dev *spi_d;
uint8_t _SSPin;
uint32_t clockDivider;
dma_channel spiRxDmaChannel, spiTxDmaChannel;
dma_dev* spiDmaDev;
void (*receiveCallback)(void) = NULL;
void (*transmitCallback)(void) = NULL;
friend class SPIClass;
};
volatile static bool dma1_ch3_Active;
/*
Should move this to within the class once tested out, just for tidyness
*/
static uint8_t ff = 0XFF;
static void (*_spi1_this);
static void (*_spi2_this);
#if BOARD_NR_SPI >= 3
static void (*_spi3_this);
#endif
/**
* @brief Wirish SPI interface.
@ -217,7 +234,15 @@ public:
*/
void setDataSize(uint32 ds);
/* Victor Perez 2017. Added to set and clear callback functions for callback
* on DMA transfer completion.
* onReceive used to set the callback in case of dmaTransfer (tx/rx), once rx is completed
* onTransmit used to set the callback in case of dmaSend (tx only). That function
* will NOT be called in case of TX/RX
*/
void onReceive(void(*)(void));
void onTransmit(void(*)(void));
/*
* I/O
*/
@ -279,7 +304,9 @@ public:
* @param receiveBuf buffer Bytes to save received data.
* @param length Number of bytes in buffer to transmit.
*/
uint8 dmaTransfer(void * transmitBuf, void * receiveBuf, uint16 length);
uint8 dmaTransfer(void * transmitBuf, void * receiveBuf, uint16 length);
void dmaTransferSet(void *transmitBuf, void *receiveBuf);
uint8 dmaTransferRepeat(uint16 length);
/**
* @brief Sets up a DMA Transmit for SPI 8 or 16 bit transfer mode.
@ -289,9 +316,13 @@ public:
*
* @param data buffer half words to transmit,
* @param length Number of bytes in buffer to transmit.
* @param minc Set to use Memory Increment mode, clear to use Circular mode.
*/
uint8 dmaSend(void * transmitBuf, uint16 length, bool minc = 1);
uint8 dmaSendAsync(void * transmitBuf, uint16 length, bool minc = 1);
uint8 dmaSend(void * transmitBuf, uint16 length, bool minc = 1);
void dmaSendSet(void * transmitBuf, bool minc);
uint8 dmaSendRepeat(uint16 length);
uint8 dmaSendAsync(void * transmitBuf, uint16 length, bool minc = 1);
/*
* Pin accessors
*/
@ -325,7 +356,7 @@ public:
spi_dev* c_dev(void) { return _currentSetting->spi_d; }
spi_dev *dev(){ return _currentSetting->spi_d;}
spi_dev *dev(){ return _currentSetting->spi_d;}
/**
* @brief Sets the number of the SPI peripheral to be used by
@ -335,10 +366,10 @@ public:
* or 1-3 in high density devices.
*/
void setModule(int spi_num)
{
_currentSetting=&_settings[spi_num-1];// SPI channels are called 1 2 and 3 but the array is zero indexed
}
void setModule(int spi_num)
{
_currentSetting=&_settings[spi_num-1];// SPI channels are called 1 2 and 3 but the array is zero indexed
}
/* -- The following methods are deprecated --------------------------- */
@ -374,19 +405,23 @@ public:
uint8 recv(void);
private:
/*
static inline void DMA1_CH3_Event() {
dma1_ch3_Active = 0;
// dma_disable(DMA1, DMA_CH3);
// dma_disable(DMA1, DMA_CH2);
// To Do. Need to wait for
}
*/
SPISettings _settings[BOARD_NR_SPI];
SPISettings *_currentSetting;
void updateSettings(void);
/*
* Functions added for DMA transfers with Callback.
* Experimental.
*/
void EventCallback(void);
static void _spi1EventCallback(void);
static void _spi2EventCallback(void);
#if BOARD_NR_SPI >= 3
static void _spi3EventCallback(void);
#endif
/*
spi_dev *spi_d;
uint8_t _SSPin;