Diff: TFT_ILI9163C_F411RE_DMA.cpp

Revision:

7:3dcb98ecf29f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TFT_ILI9163C_F411RE_DMA.cpp	Sun Feb 01 15:36:04 2015 +0000
@@ -0,0 +1,242 @@
+#include "TFT_ILI9163C.h"
+#if defined(__F411RE_DMA__)
+
+/**
+ * TFT_ILI9163C library for ST Nucleo F411RE DMA
+ * 
+ * @author Copyright (c) 2014, .S.U.M.O.T.O.Y., coded by Max MC Costa
+ * https://github.com/sumotoy/TFT_ILI9163C
+ *
+ * @author modified by masuda, Masuda Naika
+ */
+
+//Serial pc(SERIAL_TX, SERIAL_RX);
+
+//constructors
+TFT_ILI9163C::TFT_ILI9163C(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName dc, PinName reset) 
+    : TFT_ILI9163C_BASE(mosi, miso, sclk, cs, dc, reset) {
+        
+        _resetPinName = reset;
+        init(cs, dc);
+}
+
+TFT_ILI9163C::TFT_ILI9163C(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName dc) 
+    : TFT_ILI9163C_BASE(mosi, miso, sclk, cs, dc) {
+        
+        _resetPinName = NC;
+        init(cs, dc);
+}
+
+void TFT_ILI9163C::init(PinName cs, PinName dc){
+    
+    SPI_TypeDef *spi_ptr = (SPI_TypeDef*) _spi.spi;
+        
+    uint32_t cs_port_index = (uint32_t) cs >> 4;
+    uint32_t dc_port_index = (uint32_t) dc >> 4;
+    
+     //set cs/dc port addresses and masks
+    cs_port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (cs_port_index << 10));
+    cs_reg_mask = 1 << ((uint32_t) cs & 0xf);
+    dc_port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (dc_port_index << 10));
+    dc_reg_mask = 1 << ((uint32_t) dc & 0xf);
+    
+    // set bit band addresses
+//  GPIO_TypeDef *cs_port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (cs_port_index << 10));
+//  GPIO_TypeDef *dc_port_reg = (GPIO_TypeDef *) (GPIOA_BASE + (dc_port_index << 10));
+//  uint8_t cs_port_bit = (uint32_t) cs & 0xf;
+//  uint8_t dc_port_bit = (uint32_t) dc & 0xf;
+//  bb_cs_port = BITBAND_PERIPH(&cs_port_reg->ODR, cs_port_bit);
+//  bb_dc_port = BITBAND_PERIPH(&dc_port_reg->ODR, dc_port_bit);
+
+    bb_spi_txe = BITBAND_PERIPH(&spi_ptr->SR, MASK_TO_BITNUM(SPI_SR_TXE));
+    bb_spi_bsy = BITBAND_PERIPH(&spi_ptr->SR, MASK_TO_BITNUM(SPI_SR_BSY));
+    bb_spi_spe = BITBAND_PERIPH(&spi_ptr->CR1, MASK_TO_BITNUM(SPI_CR1_SPE));
+    bb_spi_dff = BITBAND_PERIPH(&spi_ptr->CR1, MASK_TO_BITNUM(SPI_CR1_DFF));
+
+    // init DMA
+    hdma.Init.Direction = DMA_MEMORY_TO_PERIPH;
+    hdma.Init.PeriphInc = DMA_PINC_DISABLE;
+    hdma.Init.MemInc = DMA_MINC_DISABLE;
+    hdma.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
+    hdma.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
+    hdma.Init.Mode = DMA_NORMAL;
+    hdma.Init.Priority = DMA_PRIORITY_MEDIUM;
+    hdma.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
+    hdma.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_HALFFULL;
+    hdma.Init.MemBurst = DMA_MBURST_SINGLE;
+    hdma.Init.PeriphBurst = DMA_PBURST_SINGLE;
+    
+    if(_spi.spi == SPI_1){
+        hdma.Instance = DMA2_Stream3;       // DMA2_Stream2
+        hdma.Init.Channel = DMA_CHANNEL_3;  // DMA_CHANNEL_2
+        __DMA2_CLK_ENABLE();
+    } else if(_spi.spi == SPI_2){
+        hdma.Instance = DMA1_Stream4;
+        hdma.Init.Channel = DMA_CHANNEL_0;
+        __DMA1_CLK_ENABLE();
+    } else if(_spi.spi == SPI_3){
+        hdma.Instance = DMA1_Stream5;       // DMA1_Stream7
+        hdma.Init.Channel = DMA_CHANNEL_0;  // DMA_CHANNEL0
+        __DMA1_CLK_ENABLE();
+    } else if(_spi.spi == SPI_4){
+        hdma.Instance = DMA2_Stream1;       // DMA2_Stream4
+        hdma.Init.Channel = DMA_CHANNEL_4;  // DMA_CHANNEL_5
+        __DMA2_CLK_ENABLE();
+    } else if(_spi.spi == SPI_5){
+        hdma.Instance = DMA2_Stream4;       // DMA2_Stream5, DMA2_Stream6
+        hdma.Init.Channel = DMA_CHANNEL_2;  // DMA_CHANNEL5, DMA_CHANNEL7
+        __DMA2_CLK_ENABLE();
+    }
+    
+    HAL_DMA_Init(&hdma);
+
+    // set SPI DR
+    hdma.Instance->PAR = (uint32_t) &spi_ptr->DR;
+    // set SPI MAR
+    hdma.Instance->M0AR = (uint32_t) &dmaBuff;
+    
+    // set bit band addresses
+    bb_spi_txdmaen = BITBAND_PERIPH(&spi_ptr->CR2, MASK_TO_BITNUM(SPI_CR2_TXDMAEN));
+    bb_dma_sxcr_en = BITBAND_PERIPH(&hdma.Instance->CR, MASK_TO_BITNUM(DMA_SxCR_EN));
+}
+
+inline void TFT_ILI9163C::selectSlave() {
+    cs_port_reg->BSRRH = cs_reg_mask;   // Use BSRR register
+}
+
+inline void TFT_ILI9163C::deselectSlave() {
+    cs_port_reg->BSRRL = cs_reg_mask;
+}
+
+inline void TFT_ILI9163C::setCommandMode() {
+    dc_port_reg->BSRRH = dc_reg_mask;
+}
+
+inline void TFT_ILI9163C::setDataMode() {
+    dc_port_reg->BSRRL = dc_reg_mask;
+}
+
+inline void TFT_ILI9163C::waitSpiFree() {
+    while (*bb_spi_txe == 0);
+    while (*bb_spi_bsy != 0);
+}
+
+inline void TFT_ILI9163C::waitBufferFree() {
+    while (*bb_spi_txe == 0);
+}
+
+inline void TFT_ILI9163C::set8bitMode() {
+    *bb_spi_spe = 0;
+    *bb_spi_dff = 0;
+    *bb_spi_spe = 1;
+}
+
+inline void TFT_ILI9163C::set16bitMode() {
+    *bb_spi_spe = 0;
+    *bb_spi_dff = 1;
+    *bb_spi_spe = 1;
+}
+
+void TFT_ILI9163C::writecommand(uint8_t c){
+    
+    set8bitMode();
+    setCommandMode();
+    selectSlave();
+    
+    SPI_TypeDef *spi_ptr = (SPI_TypeDef*) _spi.spi;
+    spi_ptr->DR = c;
+    
+    waitSpiFree();
+    deselectSlave();
+}
+
+void TFT_ILI9163C::writedata(uint8_t c){
+    
+    set8bitMode();
+    setDataMode();
+    selectSlave();
+    
+    SPI_TypeDef *spi_ptr = (SPI_TypeDef*) _spi.spi;
+    spi_ptr->DR = c;
+    
+    waitSpiFree();
+    deselectSlave();
+} 
+
+void TFT_ILI9163C::writedata16(uint16_t d){
+    
+    set16bitMode();
+    setDataMode();
+    selectSlave();
+    
+    SPI_TypeDef *spi_ptr = (SPI_TypeDef*) _spi.spi;
+    spi_ptr->DR = d;
+    
+    waitSpiFree();
+    deselectSlave();
+}
+
+
+void TFT_ILI9163C::writedata32(uint16_t d1, uint16_t d2){
+    
+    set16bitMode();
+    setDataMode();
+    selectSlave();
+    
+    SPI_TypeDef *spi_ptr = (SPI_TypeDef*) _spi.spi;
+    spi_ptr->DR = d1;
+    waitBufferFree();
+    spi_ptr->DR = d2;
+    
+    waitSpiFree();
+    deselectSlave();
+}
+
+// use DMA, but polling... :-(
+void TFT_ILI9163C::writedata16burst(uint16_t d, int32_t len) {
+    
+    len = len < 0 ? -len : len;
+    
+    if (len > 0) {
+        set16bitMode();
+        setDataMode();
+        selectSlave();
+    
+        // clear DMA flags
+//      __HAL_DMA_CLEAR_FLAG(&hdma, __HAL_DMA_GET_TE_FLAG_INDEX(&hdma));
+        __HAL_DMA_CLEAR_FLAG(&hdma, __HAL_DMA_GET_TC_FLAG_INDEX(&hdma));
+        
+        dmaBuff = d;
+        hdma.Instance->NDTR = len;
+        
+//      // enable DMA
+//      hdma.Instance->CR |= DMA_SxCR_EN;
+//      // enable DMA request from SPI
+//      SPI_TypeDef *spi_ptr = (SPI_TypeDef*) _spi.spi;
+//      spi_ptr->CR2 |= SPI_CR2_TXDMAEN;
+//      // wait DMA complete
+//      while (hdma.Instance->NDTR);
+//      // disable SPI-DMA
+//      spi_ptr->CR2 &= ~SPI_CR2_TXDMAEN;
+//      // disable DMA
+//      hdma.Instance->CR &= ~DMA_SxCR_EN;
+//      while (hdma.Instance->CR & DMA_SxCR_EN);
+        
+        // enable DMA
+        *bb_dma_sxcr_en = 1;
+        // enable DMA request from SPI
+        *bb_spi_txdmaen = 1;
+        // wait DMA complete
+        while (hdma.Instance->NDTR);
+        // disable SPI-DMA
+        *bb_spi_txdmaen = 0;
+        // disable DMA
+        *bb_dma_sxcr_en = 0;
+        while (*bb_dma_sxcr_en);
+        
+        waitSpiFree();
+        deselectSlave();
+    }
+}
+
+#endif