Stepan Smejkal
Lib for the new LCD Display with ILI9341 controller
Diff: SPI_TFT_ILI9341_NUCLEO.cpp
- Revision:
- 12:98cc5c193ecd
diff -r 59eca2723ec5 -r 98cc5c193ecd SPI_TFT_ILI9341_NUCLEO.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI_TFT_ILI9341_NUCLEO.cpp Wed Jun 25 07:54:58 2014 +0000
@@ -0,0 +1,1048 @@
+/* mbed library for 240*320 pixel display TFT based on ILI9341 LCD Controller
+ * Copyright (c) 2013, 2014 Peter Drescher - DC2PD
+ * Special version for STM Nucleo -L152
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+ // 24.06.14 initial version
+ // 25.06.14 add Nucleo F103RB
+
+// only include this file if target is L152 or F103RB :
+#if defined TARGET_NUCLEO_L152RE || defined TARGET_NUCLEO_F103RB
+
+#include "SPI_TFT_ILI9341.h"
+#include "mbed.h"
+
+#if defined TARGET_NUCLEO_L152RE
+#include "stm32l1xx_dma.h"
+#define use_ram
+#endif
+
+#if defined TARGET_NUCLEO_F103RB
+#include "stm32f10x_dma.h"
+#endif
+
+#define BPP 16 // Bits per pixel
+
+//extern Serial pc;
+//extern DigitalOut xx; // debug !!
+
+DMA_InitTypeDef DMA_InitStructure;
+
+
+SPI_TFT_ILI9341::SPI_TFT_ILI9341(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset, PinName dc, const char *name)
+ : GraphicsDisplay(name), SPI(mosi,miso,sclk,NC), _cs(cs), _reset(reset), _dc(dc)
+{
+
+ format(8,3); // 8 bit spi mode 3
+ frequency(10000000); // 10 Mhz SPI clock : result 2 / 4 = 8
+ orientation = 0;
+ char_x = 0;
+ if(_spi.spi == SPI_1){ // test which SPI is in use
+ spi_num = 1;
+ }
+ if(_spi.spi == SPI_2){
+ spi_num = 2;
+ }
+ #ifdef SPI_3 // there is no SPI 3 on all devices
+ if(_spi.spi == SPI_3){
+ spi_num = 3;
+ }
+ #endif
+ tft_reset();
+}
+
+// we define a fast write to the SPI port
+// we use the bit banding address to get the flag without masking
+
+#define bit_SPI1_txe *((volatile unsigned int *)0x42260104)
+#define SPI1_DR *((volatile unsigned int *)0x4001300C)
+#define bit_SPI2_txe *((volatile unsigned int *)0x42070104)
+#define SPI2_DR *((volatile unsigned int *)0x4000380C)
+#define bit_SPI3_txe *((volatile unsigned int *)0x42078104)
+#define SPI3_DR *((volatile unsigned int *)0x40003C0C)
+
+void SPI_TFT_ILI9341::f_write(int data){
+
+switch(spi_num){ // used SPI port
+case (1):
+ while(bit_SPI1_txe == 0); // wait for SPI1->SR TXE flag
+ SPI1_DR = data;
+ break;
+
+case (2):
+ while( bit_SPI2_txe == 0); // wait for SPI2->SR TXE flag
+ SPI2_DR = data;
+ break;
+
+case (3):
+ while( bit_SPI3_txe == 0); // wait for SPI3->SR TXE flag
+ SPI3_DR = data;
+ break;
+
+ }
+}
+
+// wait for SPI not busy
+// we have to wait for the last bit to switch the cs off
+// we use the bit banding address to get the flag without masking
+
+#define bit_SPI1_bsy *((volatile unsigned int *)0x4226011C)
+#define bit_SPI2_bsy *((volatile unsigned int *)0x4207011C)
+#define bit_SPI3_bsy *((volatile unsigned int *)0x4207811C)
+
+void inline SPI_TFT_ILI9341::spi_bsy(void){
+switch(spi_num){ // decide which SPI is to use
+case (1):
+ while(bit_SPI1_bsy == 1); // SPI1->SR bit 7
+ break;
+
+case (2):
+ while(bit_SPI2_bsy == 1); // SPI2->SR bit 7
+ break;
+
+case (3):
+ while(bit_SPI3_bsy == 1); // SPI2->SR bit 7
+ break;
+ }
+}
+
+
+// switch fast between 8 and 16 bit mode
+#define bit_SPI1_dff *((volatile unsigned int *)0x4226002C)
+#define bit_SPI2_dff *((volatile unsigned int *)0x4207002C)
+#define bit_SPI3_dff *((volatile unsigned int *)0x4207802C)
+void SPI_TFT_ILI9341::spi_16(bool s){
+switch(spi_num){ // decide which SPI is to use
+case(1):
+ if(s) bit_SPI1_dff = 1; // switch to 16 bit Mode
+ else bit_SPI1_dff = 0; // switch to 8 bit Mode
+ break;
+
+case(2):
+ if(s) bit_SPI2_dff = 1; // switch to 16 bit Mode
+ else bit_SPI2_dff = 0; // switch to 8 bit Mode
+ break;
+
+case(3):
+ if(s) bit_SPI3_dff = 1; // switch to 16 bit Mode
+ else bit_SPI3_dff = 0; // switch to 8 bit Mode
+ break;
+ }
+}
+
+
+int SPI_TFT_ILI9341::width()
+{
+ if (orientation == 0 || orientation == 2) return 240;
+ else return 320;
+}
+
+
+int SPI_TFT_ILI9341::height()
+{
+ if (orientation == 0 || orientation == 2) return 320;
+ else return 240;
+}
+
+
+void SPI_TFT_ILI9341::set_orientation(unsigned int o)
+{
+ orientation = o;
+ wr_cmd(0x36); // MEMORY_ACCESS_CONTROL
+ switch (orientation) {
+ case 0:
+ f_write(0x48);
+ break;
+ case 1:
+ f_write(0x28);
+ break;
+ case 2:
+ f_write(0x88);
+ break;
+ case 3:
+ f_write(0xE8);
+ break;
+ }
+ spi_bsy(); // wait for end of transfer
+ _cs = 1;
+ WindowMax();
+}
+
+
+// write command to tft register
+// use fast command
+void SPI_TFT_ILI9341::wr_cmd(unsigned char cmd)
+{
+ _dc = 0;
+ _cs = 0;
+ f_write(cmd);
+ spi_bsy();
+ _dc = 1;
+}
+
+void SPI_TFT_ILI9341::wr_dat(unsigned char dat)
+{
+ f_write(dat);
+ spi_bsy(); // wait for SPI send
+}
+
+// the ILI9341 can read
+char SPI_TFT_ILI9341::rd_byte(unsigned char cmd)
+{
+ // has to change !!
+ return(0);
+}
+
+// read 32 bit
+int SPI_TFT_ILI9341::rd_32(unsigned char cmd)
+{
+ // has to change !!!
+ return(0);
+}
+
+int SPI_TFT_ILI9341::Read_ID(void){
+ int r;
+ r = rd_byte(0x0A);
+ r = rd_byte(0x0A);
+ r = rd_byte(0x0A);
+ r = rd_byte(0x0A);
+ return(r);
+}
+
+
+// Init code based on MI0283QT datasheet
+// this code is called only at start
+// no need to be optimized
+
+void SPI_TFT_ILI9341::tft_reset()
+{
+ _cs = 1; // cs high
+ _dc = 1; // dc high
+ _reset = 0; // display reset
+
+ wait_us(50);
+ _reset = 1; // end hardware reset
+ wait_ms(5);
+
+ wr_cmd(0x01); // SW reset
+ wait_ms(5);
+ wr_cmd(0x28); // display off
+
+ /* Start Initial Sequence ----------------------------------------------------*/
+ wr_cmd(0xCF);
+ f_write(0x00);
+ f_write(0x83);
+ f_write(0x30);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xED);
+ f_write(0x64);
+ f_write(0x03);
+ f_write(0x12);
+ f_write(0x81);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xE8);
+ f_write(0x85);
+ f_write(0x01);
+ f_write(0x79);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xCB);
+ f_write(0x39);
+ f_write(0x2C);
+ f_write(0x00);
+ f_write(0x34);
+ f_write(0x02);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xF7);
+ f_write(0x20);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xEA);
+ f_write(0x00);
+ f_write(0x00);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xC0); // POWER_CONTROL_1
+ f_write(0x26);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xC1); // POWER_CONTROL_2
+ f_write(0x11);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xC5); // VCOM_CONTROL_1
+ f_write(0x35);
+ f_write(0x3E);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xC7); // VCOM_CONTROL_2
+ f_write(0xBE);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0x36); // MEMORY_ACCESS_CONTROL
+ f_write(0x48);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0x3A); // COLMOD_PIXEL_FORMAT_SET
+ f_write(0x55); // 16 bit pixel
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xB1); // Frame Rate
+ f_write(0x00);
+ f_write(0x1B);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xF2); // Gamma Function Disable
+ f_write(0x08);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0x26);
+ f_write(0x01); // gamma set for curve 01/2/04/08
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xE0); // positive gamma correction
+ f_write(0x1F);
+ f_write(0x1A);
+ f_write(0x18);
+ f_write(0x0A);
+ f_write(0x0F);
+ f_write(0x06);
+ f_write(0x45);
+ f_write(0x87);
+ f_write(0x32);
+ f_write(0x0A);
+ f_write(0x07);
+ f_write(0x02);
+ f_write(0x07);
+ f_write(0x05);
+ f_write(0x00);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xE1); // negativ gamma correction
+ f_write(0x00);
+ f_write(0x25);
+ f_write(0x27);
+ f_write(0x05);
+ f_write(0x10);
+ f_write(0x09);
+ f_write(0x3A);
+ f_write(0x78);
+ f_write(0x4D);
+ f_write(0x05);
+ f_write(0x18);
+ f_write(0x0D);
+ f_write(0x38);
+ f_write(0x3A);
+ f_write(0x1F);
+ spi_bsy();
+ _cs = 1;
+
+ WindowMax ();
+
+ //wr_cmd(0x34); // tearing effect off
+ //_cs = 1;
+
+ //wr_cmd(0x35); // tearing effect on
+ //_cs = 1;
+
+ wr_cmd(0xB7); // entry mode
+ f_write(0x07);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0xB6); // display function control
+ f_write(0x0A);
+ f_write(0x82);
+ f_write(0x27);
+ f_write(0x00);
+ spi_bsy();
+ _cs = 1;
+
+ wr_cmd(0x11); // sleep out
+ spi_bsy();
+ _cs = 1;
+
+ wait_ms(100);
+
+ wr_cmd(0x29); // display on
+ spi_bsy();
+ _cs = 1;
+
+ wait_ms(100);
+
+ // Configure the DMA controller init-structure
+ DMA_StructInit(&DMA_InitStructure);
+ switch(spi_num){ // decide which SPI is to use
+ case (1):
+ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); // SPI1 and SPI2 are using DMA 1
+ DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &(SPI1->DR);
+ break;
+ case (2):
+ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); // SPI1 and SPI2 are using DMA 1
+ DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &(SPI2->DR);
+ break;
+ case (3):
+ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); // SPI3 is using DMA 2
+ DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) &(SPI3->DR);
+ break;
+ }
+ DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
+ DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
+ DMA_InitStructure.DMA_BufferSize = 0;
+ DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
+ DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
+ DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
+ DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
+ DMA_InitStructure.DMA_Priority = DMA_Priority_High;
+ }
+
+
+// speed optimized
+// write direct to SPI1 register !
+void SPI_TFT_ILI9341::pixel(int x, int y, int color)
+{
+ wr_cmd(0x2A);
+ spi_16(1); // switch to 8 bit Mode
+ f_write(x);
+ spi_bsy();
+ _cs = 1;
+
+ spi_16(0); // switch to 8 bit Mode
+ wr_cmd(0x2B);
+ spi_16(1);
+ f_write(y);
+ spi_bsy();
+ _cs = 1;
+ spi_16(0);
+
+ wr_cmd(0x2C); // send pixel
+ spi_16(1);
+ f_write(color);
+ spi_bsy();
+ _cs = 1;
+ spi_16(0);
+}
+
+// optimized
+// write direct to SPI1 register !
+void SPI_TFT_ILI9341::window (unsigned int x, unsigned int y, unsigned int w, unsigned int h)
+{
+ wr_cmd(0x2A);
+ spi_16(1);
+ f_write(x);
+ f_write(x+w-1);
+ spi_bsy();
+ _cs = 1;
+ spi_16(0);
+
+ wr_cmd(0x2B);
+ spi_16(1);
+ f_write(y) ;
+ f_write(y+h-1);
+ spi_bsy();
+ _cs = 1;
+ spi_16(0);
+}
+
+
+void SPI_TFT_ILI9341::WindowMax (void)
+{
+ window (0, 0, width(), height());
+}
+
+// optimized
+// use DMA to transfer pixel data to the screen
+void SPI_TFT_ILI9341::cls (void)
+{
+ // we can use the fillrect function
+ fillrect(0,0,width()-1,height()-1,_background);
+}
+
+void SPI_TFT_ILI9341::circle(int x0, int y0, int r, int color)
+{
+
+ int x = -r, y = 0, err = 2-2*r, e2;
+ do {
+ pixel(x0-x, y0+y,color);
+ pixel(x0+x, y0+y,color);
+ pixel(x0+x, y0-y,color);
+ pixel(x0-x, y0-y,color);
+ e2 = err;
+ if (e2 <= y) {
+ err += ++y*2+1;
+ if (-x == y && e2 <= x) e2 = 0;
+ }
+ if (e2 > x) err += ++x*2+1;
+ } while (x <= 0);
+}
+
+void SPI_TFT_ILI9341::fillcircle(int x0, int y0, int r, int color)
+{
+ int x = -r, y = 0, err = 2-2*r, e2;
+ do {
+ vline(x0-x, y0-y, y0+y, color);
+ vline(x0+x, y0-y, y0+y, color);
+ e2 = err;
+ if (e2 <= y) {
+ err += ++y*2+1;
+ if (-x == y && e2 <= x) e2 = 0;
+ }
+ if (e2 > x) err += ++x*2+1;
+ } while (x <= 0);
+}
+
+
+// optimized for speed
+void SPI_TFT_ILI9341::hline(int x0, int x1, int y, int color)
+{
+ int w,j;
+ w = x1 - x0 + 1;
+ window(x0,y,w,1);
+ _dc = 0;
+ _cs = 0;
+ f_write(0x2C); // send pixel
+ spi_bsy();
+ _dc = 1;
+ spi_16(1);
+
+ for (j=0; j<w; j++) {
+ f_write(color);
+ }
+ spi_bsy();
+ spi_16(0);
+ _cs = 1;
+ WindowMax();
+ return;
+}
+
+// optimized for speed
+void SPI_TFT_ILI9341::vline(int x, int y0, int y1, int color)
+{
+ int h,y;
+ h = y1 - y0 + 1;
+ window(x,y0,1,h);
+ _dc = 0;
+ _cs = 0;
+ f_write(0x2C); // send pixel
+ spi_bsy();
+ _dc = 1;
+ spi_16(1);
+ // switch to 16 bit Mode 3
+ for (y=0; y<h; y++) {
+ f_write(color);
+ }
+ spi_bsy();
+ spi_16(0);
+ _cs = 1;
+ WindowMax();
+ return;
+}
+
+
+void SPI_TFT_ILI9341::line(int x0, int y0, int x1, int y1, int color)
+{
+ //WindowMax();
+ int dx = 0, dy = 0;
+ int dx_sym = 0, dy_sym = 0;
+ int dx_x2 = 0, dy_x2 = 0;
+ int di = 0;
+
+ dx = x1-x0;
+ dy = y1-y0;
+
+ if (dx == 0) { /* vertical line */
+ if (y1 > y0) vline(x0,y0,y1,color);
+ else vline(x0,y1,y0,color);
+ return;
+ }
+
+ if (dx > 0) {
+ dx_sym = 1;
+ } else {
+ dx_sym = -1;
+ }
+ if (dy == 0) { /* horizontal line */
+ if (x1 > x0) hline(x0,x1,y0,color);
+ else hline(x1,x0,y0,color);
+ return;
+ }
+
+ if (dy > 0) {
+ dy_sym = 1;
+ } else {
+ dy_sym = -1;
+ }
+
+ dx = dx_sym*dx;
+ dy = dy_sym*dy;
+
+ dx_x2 = dx*2;
+ dy_x2 = dy*2;
+
+ if (dx >= dy) {
+ di = dy_x2 - dx;
+ while (x0 != x1) {
+
+ pixel(x0, y0, color);
+ x0 += dx_sym;
+ if (di<0) {
+ di += dy_x2;
+ } else {
+ di += dy_x2 - dx_x2;
+ y0 += dy_sym;
+ }
+ }
+ pixel(x0, y0, color);
+ } else {
+ di = dx_x2 - dy;
+ while (y0 != y1) {
+ pixel(x0, y0, color);
+ y0 += dy_sym;
+ if (di < 0) {
+ di += dx_x2;
+ } else {
+ di += dx_x2 - dy_x2;
+ x0 += dx_sym;
+ }
+ }
+ pixel(x0, y0, color);
+ }
+ return;
+}
+
+
+void SPI_TFT_ILI9341::rect(int x0, int y0, int x1, int y1, int color)
+{
+
+ if (x1 > x0) hline(x0,x1,y0,color);
+ else hline(x1,x0,y0,color);
+
+ if (y1 > y0) vline(x0,y0,y1,color);
+ else vline(x0,y1,y0,color);
+
+ if (x1 > x0) hline(x0,x1,y1,color);
+ else hline(x1,x0,y1,color);
+
+ if (y1 > y0) vline(x1,y0,y1,color);
+ else vline(x1,y1,y0,color);
+
+ return;
+}
+
+
+
+// optimized for speed
+// use DMA
+void SPI_TFT_ILI9341::fillrect(int x0, int y0, int x1, int y1, int color)
+{
+
+ int h = y1 - y0 + 1;
+ int w = x1 - x0 + 1;
+ int pixel = h * w;
+ unsigned int dma_transfer;
+ window(x0,y0,w,h);
+
+ wr_cmd(0x2C); // send pixel
+ spi_16(1);
+ DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) &color;
+ DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
+
+ switch(spi_num){ // decide which SPI is to use
+ case (1):
+ DMA_Init(DMA1_Channel3, &DMA_InitStructure); // init the DMA
+ do{
+ if(pixel < 0x10000) {
+ dma_transfer = pixel;
+ pixel = 0;
+ }
+ else {
+ dma_transfer = 0xffff;
+ pixel = pixel - 0xffff;
+ }
+ DMA_SetCurrDataCounter(DMA1_Channel3, dma_transfer);
+ SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx,ENABLE);
+ DMA_Cmd(DMA1_Channel3, ENABLE);
+ while(DMA_GetCurrDataCounter(DMA1_Channel3) != 0); // wait for end of transfer
+ DMA_Cmd(DMA1_Channel3, DISABLE);
+ }while(pixel > 0);
+ break;
+
+ case (2):
+ DMA_Init(DMA1_Channel5, &DMA_InitStructure); // init the DMA
+ do{
+ if(pixel < 0x10000) {
+ dma_transfer = pixel;
+ pixel = 0;
+ }
+ else {
+ dma_transfer = 0xffff;
+ pixel = pixel - 0xffff;
+ }
+ DMA_SetCurrDataCounter(DMA1_Channel5, dma_transfer);
+ SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx,ENABLE);
+ DMA_Cmd(DMA1_Channel5, ENABLE);
+ while(DMA_GetCurrDataCounter(DMA1_Channel5) != 0); // wait for end of transfer
+ DMA_Cmd(DMA1_Channel5, DISABLE);
+ }while(pixel > 0);
+ break;
+
+ case (3):
+ DMA_Init(DMA2_Channel2, &DMA_InitStructure); // init the DMA
+ do{
+ if(pixel < 0x10000) {
+ dma_transfer = pixel;
+ pixel = 0;
+ }
+ else {
+ dma_transfer = 0xffff;
+ pixel = pixel - 0xffff;
+ }
+ DMA_SetCurrDataCounter(DMA2_Channel2, dma_transfer);
+ SPI_I2S_DMACmd(SPI3, SPI_I2S_DMAReq_Tx,ENABLE);
+ DMA_Cmd(DMA2_Channel2, ENABLE);
+ while(DMA_GetCurrDataCounter(DMA2_Channel2) != 0); // wait for end of transfer
+ DMA_Cmd(DMA2_Channel2, DISABLE);
+ }while(pixel > 0);
+ break;
+ }
+ spi_bsy();
+ spi_16(0);
+ _cs = 1;
+ WindowMax();
+ return;
+}
+
+void SPI_TFT_ILI9341::locate(int x, int y)
+{
+ char_x = x;
+ char_y = y;
+}
+
+int SPI_TFT_ILI9341::columns()
+{
+ return width() / font[1];
+}
+
+
+int SPI_TFT_ILI9341::rows()
+{
+ return height() / font[2];
+}
+
+
+int SPI_TFT_ILI9341::_putc(int value)
+{
+ if (value == '\n') { // new line
+ char_x = 0;
+ char_y = char_y + font[2];
+ if (char_y >= height() - font[2]) {
+ char_y = 0;
+ }
+ } else {
+ character(char_x, char_y, value);
+ }
+ return value;
+}
+
+
+// speed optimized
+// will use dma
+void SPI_TFT_ILI9341::character(int x, int y, int c)
+{
+ unsigned int hor,vert,offset,bpl,j,i,b;
+ unsigned char* zeichen;
+ unsigned char z,w;
+ #ifdef use_ram
+ unsigned int pixel;
+ unsigned int p;
+ unsigned int dma_count,dma_off;
+ uint16_t *buffer;
+ #endif
+
+ if ((c < 31) || (c > 127)) return; // test char range
+
+ // read font parameter from start of array
+ offset = font[0]; // bytes / char
+ hor = font[1]; // get hor size of font
+ vert = font[2]; // get vert size of font
+ bpl = font[3]; // bytes per line
+
+ if (char_x + hor > width()) {
+ char_x = 0;
+ char_y = char_y + vert;
+ if (char_y >= height() - font[2]) {
+ char_y = 0;
+ }
+ }
+ window(char_x, char_y,hor,vert); // setup char box
+ wr_cmd(0x2C);
+ spi_16(1); // switch to 16 bit Mode
+ #ifdef use_ram
+ pixel = hor * vert; // calculate buffer size
+ buffer = (uint16_t *) malloc (2*pixel); // we need a buffer for the font
+ if(buffer != NULL) { // there is memory space -> use dma
+ zeichen = &font[((c -32) * offset) + 4]; // start of char bitmap
+ w = zeichen[0]; // width of actual char
+ p = 0;
+ // construct the font into the buffer
+ for (j=0; j<vert; j++) { // vert line
+ for (i=0; i<hor; i++) { // horz line
+ z = zeichen[bpl * i + ((j & 0xF8) >> 3)+1];
+ b = 1 << (j & 0x07);
+ if (( z & b ) == 0x00) {
+ buffer[p] = _background;
+ } else {
+ buffer[p] = _foreground;
+ }
+ p++;
+ }
+ }
+ // copy the buffer with DMA SPI to display
+ dma_off = 0; // offset for DMA transfer
+ DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t) (buffer + dma_off);
+ DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
+
+ switch(spi_num){ // decide which SPI is to use
+ case (1):
+ DMA_Init(DMA1_Channel3, &DMA_InitStructure); // init the DMA
+ // start DMA
+ do {
+ if (pixel > 0X10000) { // this is a giant font !
+ dma_count = 0Xffff;
+ pixel = pixel - 0Xffff;
+ } else {
+ dma_count = pixel;
+ pixel = 0;
+ }
+ DMA_SetCurrDataCounter(DMA1_Channel3, dma_count);
+ SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx,ENABLE);
+ DMA_Cmd(DMA1_Channel3, ENABLE);
+ while(DMA_GetCurrDataCounter(DMA1_Channel3) != 0); // wait for end of transfer
+ DMA_Cmd(DMA1_Channel3, DISABLE);
+ }while(pixel > 0);
+ break;
+
+ case (2):
+ DMA_Init(DMA1_Channel5, &DMA_InitStructure); // init the DMA
+ // start DMA
+ do {
+ if (pixel > 0X10000) { // this is a giant font !
+ dma_count = 0Xffff;
+ pixel = pixel - 0Xffff;
+ } else {
+ dma_count = pixel;
+ pixel = 0;
+ }
+ DMA_SetCurrDataCounter(DMA1_Channel5, dma_count);
+ SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx,ENABLE);
+ DMA_Cmd(DMA1_Channel5, ENABLE);
+ while(DMA_GetCurrDataCounter(DMA1_Channel5) != 0); // wait for end of transfer
+ DMA_Cmd(DMA1_Channel5, DISABLE);
+ }while(pixel > 0);
+ break;
+
+ case (3):
+ DMA_Init(DMA2_Channel2, &DMA_InitStructure); // init the DMA
+ // start DMA
+ do {
+ if (pixel > 0X10000) { // this is a giant font !
+ dma_count = 0Xffff;
+ pixel = pixel - 0Xffff;
+ } else {
+ dma_count = pixel;
+ pixel = 0;
+ }
+ DMA_SetCurrDataCounter(DMA2_Channel2, dma_count);
+ SPI_I2S_DMACmd(SPI3, SPI_I2S_DMAReq_Tx,ENABLE);
+ DMA_Cmd(DMA2_Channel2, ENABLE);
+ while(DMA_GetCurrDataCounter(DMA2_Channel2) != 0); // wait for end of transfer
+ DMA_Cmd(DMA2_Channel2, DISABLE);
+ }while(pixel > 0);
+ break;
+
+ }
+ spi_bsy();
+ free ((uint16_t *) buffer);
+ spi_16(0);
+ }
+
+ else{
+ #endif
+ zeichen = &font[((c -32) * offset) + 4]; // start of char bitmap
+ w = zeichen[0]; // width of actual char
+ for (j=0; j<vert; j++) { // vert line
+ for (i=0; i<hor; i++) { // horz line
+ z = zeichen[bpl * i + ((j & 0xF8) >> 3)+1];
+ b = 1 << (j & 0x07);
+ if (( z & b ) == 0x00) {
+ f_write(_background);
+ } else {
+ f_write(_foreground);
+ }
+ }
+ }
+ spi_bsy();
+ _cs = 1;
+ spi_16(0);
+ #ifdef use_ram
+ }
+ #endif
+ _cs = 1;
+ WindowMax();
+ if ((w + 2) < hor) { // x offset to next char
+ char_x += w + 2;
+ } else char_x += hor;
+}
+
+
+void SPI_TFT_ILI9341::set_font(unsigned char* f)
+{
+ font = f;
+}
+
+
+void SPI_TFT_ILI9341::Bitmap(unsigned int x, unsigned int y, unsigned int w, unsigned int h,unsigned char *bitmap)
+{
+ unsigned int j;
+ int padd;
+ unsigned short *bitmap_ptr = (unsigned short *)bitmap;
+
+ unsigned int i;
+
+ // the lines are padded to multiple of 4 bytes in a bitmap
+ padd = -1;
+ do {
+ padd ++;
+ } while (2*(w + padd)%4 != 0);
+ window(x, y, w, h);
+ bitmap_ptr += ((h - 1)* (w + padd));
+ wr_cmd(0x2C); // send pixel
+ spi_16(1);
+ for (j = 0; j < h; j++) { //Lines
+ for (i = 0; i < w; i++) { // one line
+ f_write(*bitmap_ptr); // one line
+ bitmap_ptr++;
+ }
+ bitmap_ptr -= 2*w;
+ bitmap_ptr -= padd;
+ }
+ spi_bsy();
+ _cs = 1;
+ spi_16(0);
+ WindowMax();
+}
+
+
+// local filesystem is not implemented but you can add a SD card to a different SPI
+
+int SPI_TFT_ILI9341::BMP_16(unsigned int x, unsigned int y, const char *Name_BMP)
+{
+
+#define OffsetPixelWidth 18
+#define OffsetPixelHeigh 22
+#define OffsetFileSize 34
+#define OffsetPixData 10
+#define OffsetBPP 28
+
+ char filename[50];
+ unsigned char BMP_Header[54];
+ unsigned short BPP_t;
+ unsigned int PixelWidth,PixelHeigh,start_data;
+ unsigned int i,off;
+ int padd,j;
+ unsigned short *line;
+
+ // get the filename
+ i=0;
+ while (*Name_BMP!='\0') {
+ filename[i++]=*Name_BMP++;
+ }
+ filename[i] = 0;
+
+ FILE *Image = fopen((const char *)&filename[0], "rb"); // open the bmp file
+ if (!Image) {
+ return(0); // error file not found !
+ }
+
+ fread(&BMP_Header[0],1,54,Image); // get the BMP Header
+
+ if (BMP_Header[0] != 0x42 || BMP_Header[1] != 0x4D) { // check magic byte
+ fclose(Image);
+ return(-1); // error no BMP file
+ }
+
+ BPP_t = BMP_Header[OffsetBPP] + (BMP_Header[OffsetBPP + 1] << 8);
+ if (BPP_t != 0x0010) {
+ fclose(Image);
+ return(-2); // error no 16 bit BMP
+ }
+
+ PixelHeigh = BMP_Header[OffsetPixelHeigh] + (BMP_Header[OffsetPixelHeigh + 1] << 8) + (BMP_Header[OffsetPixelHeigh + 2] << 16) + (BMP_Header[OffsetPixelHeigh + 3] << 24);
+ PixelWidth = BMP_Header[OffsetPixelWidth] + (BMP_Header[OffsetPixelWidth + 1] << 8) + (BMP_Header[OffsetPixelWidth + 2] << 16) + (BMP_Header[OffsetPixelWidth + 3] << 24);
+ if (PixelHeigh > height() + y || PixelWidth > width() + x) {
+ fclose(Image);
+ return(-3); // to big
+ }
+
+ start_data = BMP_Header[OffsetPixData] + (BMP_Header[OffsetPixData + 1] << 8) + (BMP_Header[OffsetPixData + 2] << 16) + (BMP_Header[OffsetPixData + 3] << 24);
+
+ line = (unsigned short *) malloc (2 * PixelWidth); // we need a buffer for a line
+ if (line == NULL) {
+ return(-4); // error no memory
+ }
+
+ // the bmp lines are padded to multiple of 4 bytes
+ padd = -1;
+ do {
+ padd ++;
+ } while ((PixelWidth * 2 + padd)%4 != 0);
+
+ window(x, y,PixelWidth ,PixelHeigh);
+ wr_cmd(0x2C); // send pixel
+ spi_16(1);
+ for (j = PixelHeigh - 1; j >= 0; j--) { //Lines bottom up
+ off = j * (PixelWidth * 2 + padd) + start_data; // start of line
+ fseek(Image, off ,SEEK_SET);
+ fread(line,1,PixelWidth * 2,Image); // read a line - slow
+ for (i = 0; i < PixelWidth; i++) { // copy pixel data to TFT
+ f_write(line[i]); // one 16 bit pixel
+ }
+ }
+ spi_bsy();
+ _cs = 1;
+ spi_16(0);
+ free (line);
+ fclose(Image);
+ WindowMax();
+ return(1);
+}
+
+#endif
+