Only set up SPI pins as needed (#19372)
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Victor Oliveira
GitHub
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commit
79d4123319
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@ -39,10 +39,10 @@
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* Some of the LCD interfaces/adapters result in the LCD SPI and the SD card
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* SPI sharing pins. The SCK, MOSI & MISO pins can NOT be set/cleared with
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* WRITE nor digitalWrite when the hardware SPI module within the LPC17xx is
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* active. If any of these pins are shared then the software SPI must be used.
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* active. If any of these pins are shared then the software SPI must be used.
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*
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* A more sophisticated hardware SPI can be found at the following link. This
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* implementation has not been fully debugged.
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* A more sophisticated hardware SPI can be found at the following link.
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* This implementation has not been fully debugged.
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* https://github.com/MarlinFirmware/Marlin/tree/071c7a78f27078fd4aee9a3ef365fcf5e143531e
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*/
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@ -170,34 +170,20 @@ static inline void waitSpiTxEnd(LPC_SSP_TypeDef *spi_d) {
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while (SSP_GetStatus(spi_d, SSP_STAT_BUSY) == SET) { /* nada */ } // wait until BSY=0
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}
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// Retain the pin init state of the SPI, to avoid init more than once,
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// even if more instances of SPIClass exist
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static bool spiInitialised[BOARD_NR_SPI] = { false };
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SPIClass::SPIClass(uint8_t device) {
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// Init things specific to each SPI device
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// clock divider setup is a bit of hack, and needs to be improved at a later date.
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PINSEL_CFG_Type PinCfg; // data structure to hold init values
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#if BOARD_NR_SPI >= 1
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_settings[0].spi_d = LPC_SSP0;
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_settings[0].dataMode = SPI_MODE0;
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_settings[0].dataSize = DATA_SIZE_8BIT;
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_settings[0].clock = SPI_CLOCK_MAX;
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// _settings[0].clockDivider = determine_baud_rate(_settings[0].spi_d, _settings[0].clock);
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PinCfg.Funcnum = 2;
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PinCfg.OpenDrain = 0;
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PinCfg.Pinmode = 0;
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PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI1_SCK_PIN);
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PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI1_SCK_PIN);
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PINSEL_ConfigPin(&PinCfg);
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SET_OUTPUT(BOARD_SPI1_SCK_PIN);
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PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI1_MISO_PIN);
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PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI1_MISO_PIN);
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PINSEL_ConfigPin(&PinCfg);
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SET_INPUT(BOARD_SPI1_MISO_PIN);
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PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI1_MOSI_PIN);
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PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI1_MOSI_PIN);
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PINSEL_ConfigPin(&PinCfg);
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SET_OUTPUT(BOARD_SPI1_MOSI_PIN);
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//_settings[0].clockDivider = determine_baud_rate(_settings[0].spi_d, _settings[0].clock);
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#endif
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#if BOARD_NR_SPI >= 2
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@ -205,34 +191,53 @@ SPIClass::SPIClass(uint8_t device) {
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_settings[1].dataMode = SPI_MODE0;
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_settings[1].dataSize = DATA_SIZE_8BIT;
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_settings[1].clock = SPI_CLOCK_MAX;
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// _settings[1].clockDivider = determine_baud_rate(_settings[1].spi_d, _settings[1].clock);
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PinCfg.Funcnum = 2;
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PinCfg.OpenDrain = 0;
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PinCfg.Pinmode = 0;
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PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI2_SCK_PIN);
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PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI2_SCK_PIN);
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PINSEL_ConfigPin(&PinCfg);
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SET_OUTPUT(BOARD_SPI2_SCK_PIN);
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PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI2_MISO_PIN);
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PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI2_MISO_PIN);
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PINSEL_ConfigPin(&PinCfg);
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SET_INPUT(BOARD_SPI2_MISO_PIN);
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PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI2_MOSI_PIN);
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PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI2_MOSI_PIN);
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PINSEL_ConfigPin(&PinCfg);
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SET_OUTPUT(BOARD_SPI2_MOSI_PIN);
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//_settings[1].clockDivider = determine_baud_rate(_settings[1].spi_d, _settings[1].clock);
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#endif
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setModule(device);
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/* Initialize GPDMA controller */
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//TODO: call once in the constructor? or each time?
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// Init the GPDMA controller
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// TODO: call once in the constructor? or each time?
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GPDMA_Init();
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}
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void SPIClass::begin() {
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// Init the SPI pins in the first begin call
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if ((_currentSetting->spi_d == LPC_SSP0 && spiInitialised[0] == false) ||
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(_currentSetting->spi_d == LPC_SSP1 && spiInitialised[1] == false)) {
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pin_t sck, miso, mosi;
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if (_currentSetting->spi_d == LPC_SSP0) {
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sck = BOARD_SPI1_SCK_PIN;
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miso = BOARD_SPI1_MISO_PIN;
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mosi = BOARD_SPI1_MOSI_PIN;
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spiInitialised[0] = true;
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}
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else if (_currentSetting->spi_d == LPC_SSP1) {
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sck = BOARD_SPI2_SCK_PIN;
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miso = BOARD_SPI2_MISO_PIN;
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mosi = BOARD_SPI2_MOSI_PIN;
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spiInitialised[1] = true;
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}
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PINSEL_CFG_Type PinCfg; // data structure to hold init values
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PinCfg.Funcnum = 2;
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PinCfg.OpenDrain = 0;
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PinCfg.Pinmode = 0;
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PinCfg.Pinnum = LPC176x::pin_bit(sck);
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PinCfg.Portnum = LPC176x::pin_port(sck);
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PINSEL_ConfigPin(&PinCfg);
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SET_OUTPUT(sck);
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PinCfg.Pinnum = LPC176x::pin_bit(miso);
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PinCfg.Portnum = LPC176x::pin_port(miso);
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PINSEL_ConfigPin(&PinCfg);
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SET_INPUT(miso);
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PinCfg.Pinnum = LPC176x::pin_bit(mosi);
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PinCfg.Portnum = LPC176x::pin_port(mosi);
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PINSEL_ConfigPin(&PinCfg);
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SET_OUTPUT(mosi);
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}
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updateSettings();
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SSP_Cmd(_currentSetting->spi_d, ENABLE); // start SSP running
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}
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@ -246,7 +251,7 @@ void SPIClass::beginTransaction(const SPISettings &cfg) {
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}
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uint8_t SPIClass::transfer(const uint16_t b) {
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/* send and receive a single byte */
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// Send and receive a single byte
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SSP_ReceiveData(_currentSetting->spi_d); // read any previous data
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SSP_SendData(_currentSetting->spi_d, b);
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waitSpiTxEnd(_currentSetting->spi_d); // wait for it to finish
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@ -254,8 +259,7 @@ uint8_t SPIClass::transfer(const uint16_t b) {
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}
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uint16_t SPIClass::transfer16(const uint16_t data) {
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return (transfer((data >> 8) & 0xFF) << 8)
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| (transfer(data & 0xFF) & 0xFF);
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return (transfer((data >> 8) & 0xFF) << 8) | (transfer(data & 0xFF) & 0xFF);
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}
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void SPIClass::end() {
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@ -294,23 +298,23 @@ void SPIClass::dmaSend(void *buf, uint16_t length, bool minc) {
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// Enable dma on SPI
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SSP_DMACmd(_currentSetting->spi_d, SSP_DMA_TX, ENABLE);
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// only increase memory if minc is true
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// Only increase memory if minc is true
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GPDMACfg.MemoryIncrease = (minc ? GPDMA_DMACCxControl_SI : 0);
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// Setup channel with given parameter
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GPDMA_Setup(&GPDMACfg);
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// enabled dma
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// Enable DMA
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GPDMA_ChannelCmd(0, ENABLE);
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// wait data transfer
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// Wait for data transfer
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while (!GPDMA_IntGetStatus(GPDMA_STAT_RAWINTTC, 0) && !GPDMA_IntGetStatus(GPDMA_STAT_RAWINTERR, 0)) { }
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// clear err and int
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// Clear err and int
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GPDMA_ClearIntPending (GPDMA_STATCLR_INTTC, 0);
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GPDMA_ClearIntPending (GPDMA_STATCLR_INTERR, 0);
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// dma disable
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// Disable DMA
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GPDMA_ChannelCmd(0, DISABLE);
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waitSpiTxEnd(_currentSetting->spi_d);
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