diff --git a/Marlin/src/HAL/LPC1768/HAL_SPI.cpp b/Marlin/src/HAL/LPC1768/HAL_SPI.cpp index e13f2d98cb..b3d2908ac9 100644 --- a/Marlin/src/HAL/LPC1768/HAL_SPI.cpp +++ b/Marlin/src/HAL/LPC1768/HAL_SPI.cpp @@ -39,10 +39,10 @@ * Some of the LCD interfaces/adapters result in the LCD SPI and the SD card * SPI sharing pins. The SCK, MOSI & MISO pins can NOT be set/cleared with * WRITE nor digitalWrite when the hardware SPI module within the LPC17xx is - * active. If any of these pins are shared then the software SPI must be used. + * active. If any of these pins are shared then the software SPI must be used. * - * A more sophisticated hardware SPI can be found at the following link. This - * implementation has not been fully debugged. + * A more sophisticated hardware SPI can be found at the following link. + * This implementation has not been fully debugged. * https://github.com/MarlinFirmware/Marlin/tree/071c7a78f27078fd4aee9a3ef365fcf5e143531e */ @@ -170,34 +170,20 @@ static inline void waitSpiTxEnd(LPC_SSP_TypeDef *spi_d) { while (SSP_GetStatus(spi_d, SSP_STAT_BUSY) == SET) { /* nada */ } // wait until BSY=0 } +// Retain the pin init state of the SPI, to avoid init more than once, +// even if more instances of SPIClass exist +static bool spiInitialised[BOARD_NR_SPI] = { false }; + SPIClass::SPIClass(uint8_t device) { // Init things specific to each SPI device // clock divider setup is a bit of hack, and needs to be improved at a later date. - PINSEL_CFG_Type PinCfg; // data structure to hold init values #if BOARD_NR_SPI >= 1 _settings[0].spi_d = LPC_SSP0; _settings[0].dataMode = SPI_MODE0; _settings[0].dataSize = DATA_SIZE_8BIT; _settings[0].clock = SPI_CLOCK_MAX; - // _settings[0].clockDivider = determine_baud_rate(_settings[0].spi_d, _settings[0].clock); - PinCfg.Funcnum = 2; - PinCfg.OpenDrain = 0; - PinCfg.Pinmode = 0; - PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI1_SCK_PIN); - PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI1_SCK_PIN); - PINSEL_ConfigPin(&PinCfg); - SET_OUTPUT(BOARD_SPI1_SCK_PIN); - - PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI1_MISO_PIN); - PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI1_MISO_PIN); - PINSEL_ConfigPin(&PinCfg); - SET_INPUT(BOARD_SPI1_MISO_PIN); - - PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI1_MOSI_PIN); - PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI1_MOSI_PIN); - PINSEL_ConfigPin(&PinCfg); - SET_OUTPUT(BOARD_SPI1_MOSI_PIN); + //_settings[0].clockDivider = determine_baud_rate(_settings[0].spi_d, _settings[0].clock); #endif #if BOARD_NR_SPI >= 2 @@ -205,34 +191,53 @@ SPIClass::SPIClass(uint8_t device) { _settings[1].dataMode = SPI_MODE0; _settings[1].dataSize = DATA_SIZE_8BIT; _settings[1].clock = SPI_CLOCK_MAX; - // _settings[1].clockDivider = determine_baud_rate(_settings[1].spi_d, _settings[1].clock); - PinCfg.Funcnum = 2; - PinCfg.OpenDrain = 0; - PinCfg.Pinmode = 0; - PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI2_SCK_PIN); - PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI2_SCK_PIN); - PINSEL_ConfigPin(&PinCfg); - SET_OUTPUT(BOARD_SPI2_SCK_PIN); - - PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI2_MISO_PIN); - PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI2_MISO_PIN); - PINSEL_ConfigPin(&PinCfg); - SET_INPUT(BOARD_SPI2_MISO_PIN); - - PinCfg.Pinnum = LPC176x::pin_bit(BOARD_SPI2_MOSI_PIN); - PinCfg.Portnum = LPC176x::pin_port(BOARD_SPI2_MOSI_PIN); - PINSEL_ConfigPin(&PinCfg); - SET_OUTPUT(BOARD_SPI2_MOSI_PIN); + //_settings[1].clockDivider = determine_baud_rate(_settings[1].spi_d, _settings[1].clock); #endif setModule(device); - /* Initialize GPDMA controller */ - //TODO: call once in the constructor? or each time? + // Init the GPDMA controller + // TODO: call once in the constructor? or each time? GPDMA_Init(); } void SPIClass::begin() { + // Init the SPI pins in the first begin call + if ((_currentSetting->spi_d == LPC_SSP0 && spiInitialised[0] == false) || + (_currentSetting->spi_d == LPC_SSP1 && spiInitialised[1] == false)) { + pin_t sck, miso, mosi; + if (_currentSetting->spi_d == LPC_SSP0) { + sck = BOARD_SPI1_SCK_PIN; + miso = BOARD_SPI1_MISO_PIN; + mosi = BOARD_SPI1_MOSI_PIN; + spiInitialised[0] = true; + } + else if (_currentSetting->spi_d == LPC_SSP1) { + sck = BOARD_SPI2_SCK_PIN; + miso = BOARD_SPI2_MISO_PIN; + mosi = BOARD_SPI2_MOSI_PIN; + spiInitialised[1] = true; + } + PINSEL_CFG_Type PinCfg; // data structure to hold init values + PinCfg.Funcnum = 2; + PinCfg.OpenDrain = 0; + PinCfg.Pinmode = 0; + PinCfg.Pinnum = LPC176x::pin_bit(sck); + PinCfg.Portnum = LPC176x::pin_port(sck); + PINSEL_ConfigPin(&PinCfg); + SET_OUTPUT(sck); + + PinCfg.Pinnum = LPC176x::pin_bit(miso); + PinCfg.Portnum = LPC176x::pin_port(miso); + PINSEL_ConfigPin(&PinCfg); + SET_INPUT(miso); + + PinCfg.Pinnum = LPC176x::pin_bit(mosi); + PinCfg.Portnum = LPC176x::pin_port(mosi); + PINSEL_ConfigPin(&PinCfg); + SET_OUTPUT(mosi); + } + updateSettings(); SSP_Cmd(_currentSetting->spi_d, ENABLE); // start SSP running } @@ -246,7 +251,7 @@ void SPIClass::beginTransaction(const SPISettings &cfg) { } uint8_t SPIClass::transfer(const uint16_t b) { - /* send and receive a single byte */ + // Send and receive a single byte SSP_ReceiveData(_currentSetting->spi_d); // read any previous data SSP_SendData(_currentSetting->spi_d, b); waitSpiTxEnd(_currentSetting->spi_d); // wait for it to finish @@ -254,8 +259,7 @@ uint8_t SPIClass::transfer(const uint16_t b) { } uint16_t SPIClass::transfer16(const uint16_t data) { - return (transfer((data >> 8) & 0xFF) << 8) - | (transfer(data & 0xFF) & 0xFF); + return (transfer((data >> 8) & 0xFF) << 8) | (transfer(data & 0xFF) & 0xFF); } void SPIClass::end() { @@ -294,23 +298,23 @@ void SPIClass::dmaSend(void *buf, uint16_t length, bool minc) { // Enable dma on SPI SSP_DMACmd(_currentSetting->spi_d, SSP_DMA_TX, ENABLE); - // only increase memory if minc is true + // Only increase memory if minc is true GPDMACfg.MemoryIncrease = (minc ? GPDMA_DMACCxControl_SI : 0); // Setup channel with given parameter GPDMA_Setup(&GPDMACfg); - // enabled dma + // Enable DMA GPDMA_ChannelCmd(0, ENABLE); - // wait data transfer + // Wait for data transfer while (!GPDMA_IntGetStatus(GPDMA_STAT_RAWINTTC, 0) && !GPDMA_IntGetStatus(GPDMA_STAT_RAWINTERR, 0)) { } - // clear err and int + // Clear err and int GPDMA_ClearIntPending (GPDMA_STATCLR_INTTC, 0); GPDMA_ClearIntPending (GPDMA_STATCLR_INTERR, 0); - // dma disable + // Disable DMA GPDMA_ChannelCmd(0, DISABLE); waitSpiTxEnd(_currentSetting->spi_d);