Stepan Smejkal
Lib for the new LCD Display with ILI9341 controller
Diff: SPI_TFT_ILI9341_NXP.cpp
- Revision:
- 14:2724838d11ed
- Parent:
- 13:b2b3e5430f81
--- a/SPI_TFT_ILI9341_NXP.cpp Wed Jun 25 16:51:27 2014 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,914 +0,0 @@
-/* mbed library for 240*320 pixel display TFT based on ILI9341 LCD Controller
- * Copyright (c) 2014 Peter Drescher - DC2PD
- * Special version for NXP LPC1768
- *
- * 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.
- */
-
-// 25.06.14 initial version
-
-// only include this file if target is LPC1768
-#if defined TARGET_LPC1768
-
-#include "SPI_TFT_ILI9341.h"
-#include "mbed.h"
-
-#if defined TARGET_LPC1768
-#define use_ram
-#endif
-
-// some defines for the DMA use
-#define DMA_CHANNEL_ENABLE 1
-#define DMA_TRANSFER_TYPE_M2P (1UL << 11)
-#define DMA_CHANNEL_TCIE (1UL << 31)
-#define DMA_CHANNEL_SRC_INC (1UL << 26)
-#define DMA_MASK_IE (1UL << 14)
-#define DMA_MASK_ITC (1UL << 15)
-#define DMA_SSP1_TX (1UL << 2)
-#define DMA_SSP0_TX (0)
-#define DMA_DEST_SSP1_TX (2UL << 6)
-#define DMA_DEST_SSP0_TX (0UL << 6)
-
-#define BPP 16 // Bits per pixel
-
-//extern Serial pc;
-//extern DigitalOut xx; // debug !!
-
-
-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), _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((int)_spi.spi == SPI_0) { // test which SPI is in use
- spi_num = 0;
- }
- if((int)_spi.spi == SPI_1) {
- spi_num = 1;
- }
- tft_reset();
-}
-
-// we define a fast write to the SPI port
-void inline SPI_TFT_ILI9341::f_write(int data)
-{
- while(((_spi.spi->SR) & 0x02) == 0);
- _spi.spi->DR = data;
-}
-
-// wait for SPI not busy
-// we have to wait for the last bit to switch the cs off
-void inline SPI_TFT_ILI9341::spi_bsy(void)
-{
- while ((_spi.spi->SR & 0x10) == 0x10); // SPI not idle
-}
-
-
-// switch fast between 8 and 16 bit mode
-void SPI_TFT_ILI9341::spi_16(bool s)
-{
- if(s) _spi.spi->CR0 |= 0x08; // switch to 16 bit Mode
- else _spi.spi->CR0 &= ~(0x08); // switch to 8 bit Mode
-
-}
-
-
-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);
-
- // setup DMA channel 0
- LPC_SC->PCONP |= (1UL << 29); // Power up the GPDMA.
- LPC_GPDMA->DMACConfig = 1; // enable DMA controller
- LPC_GPDMA->DMACIntTCClear = 0x1; // Reset the Interrupt status
- LPC_GPDMA->DMACIntErrClr = 0x1;
- LPC_GPDMACH0->DMACCLLI = 0;
-}
-
-
-// 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_count;
- window(x0,y0,w,h);
-
- wr_cmd(0x2C); // send pixel
- spi_16(1);
-
- LPC_GPDMACH0->DMACCSrcAddr = (uint32_t)&color;
-
- switch(spi_num) { // decide which SPI is to use
- case (0):
- LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
- LPC_SSP0->DMACR = 0x2;
- break;
- case (1):
- LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
- LPC_SSP1->DMACR = 0x2;
- break;
- }
-
- // start DMA
- do {
- if (pixel > 4095) {
- dma_count = 4095;
- pixel = pixel - 4095;
- } else {
- dma_count = pixel;
- pixel = 0;
- }
- LPC_GPDMA->DMACIntTCClear = 0x1;
- LPC_GPDMA->DMACIntErrClr = 0x1;
- LPC_GPDMACH0->DMACCControl = dma_count | (1UL << 18) | (1UL << 21) | (1UL << 31) ; // 16 bit transfer , no address increment, interrupt
- LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P | (spi_num ? DMA_DEST_SSP1_TX : DMA_DEST_SSP0_TX);
- LPC_GPDMA->DMACSoftSReq = 0x1; // DMA request
- do {
- } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
- } while (pixel > 0);
-
- spi_bsy(); // wait for end of transfer
- 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
-
- switch(spi_num) { // decide which SPI is to use
- case (0):
- LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
- LPC_SSP0->DMACR = 0x2;
- break;
- case (1):
- LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
- LPC_SSP1->DMACR = 0x2;
- break;
- }
- // start DMA
- do {
- if (pixel > 4095) { // this is a giant font !
- dma_count = 4095;
- pixel = pixel - 4095;
- } else {
- dma_count = pixel;
- pixel = 0;
- }
- LPC_GPDMA->DMACIntTCClear = 0x1;
- LPC_GPDMA->DMACIntErrClr = 0x1;
- LPC_GPDMACH0->DMACCSrcAddr = (uint32_t) (buffer + dma_off);
- LPC_GPDMACH0->DMACCControl = dma_count | (1UL << 18) | (1UL << 21) | (1UL << 31) | DMA_CHANNEL_SRC_INC ; // 16 bit transfer , address increment, interrupt
- LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P | (spi_num ? DMA_DEST_SSP1_TX : DMA_DEST_SSP0_TX);
- LPC_GPDMA->DMACSoftSReq = 0x1;
- do {
- } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
- dma_off = dma_off + dma_count;
- } while (pixel > 0);
-
-
- 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
-