Peter Drescher
Library to control a QVGA TFT connected to SPI. You can use printf to print text The lib can handle different fonts, draw lines, circles, rect and bmp
Dependents: TFT_Test1 SourceCodePro31-SB Mandelbrot Mindwave-screen ... more
See http://mbed.org/cookbook/SPI-driven-QVGA-TFT for details.
Diff: SPI_TFT.cpp
- Revision:
- 0:de9d1462a835
- Child:
- 1:17e12e4e149f
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/SPI_TFT.cpp Mon Sep 10 19:23:26 2012 +0000
@@ -0,0 +1,1053 @@
+/* mbed library for 240*320 pixel display TFT based on HX8347D LCD Controller
+ * Copyright (c) 2011 Peter Drescher - DC2PD
+ *
+ * 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.
+ */
+
+
+// fix bmp padding for Bitmap function
+// speed up pixel
+// 30.12.11 fix cls
+// 11.03.12 use DMA to speed up
+// 15.03.12 use SSEL for TFT CS to enable DMA Register writes
+// 06.04.12 fix SSEL CS problem
+// 06.04.12 use direct access to the spi register to speed up the library.
+
+
+#include "SPI_TFT.h"
+#include "mbed.h"
+
+
+#define BPP 16 // Bits per pixel
+
+
+//extern Serial pc;
+//extern DigitalOut xx; // debug !!
+
+SPI_TFT::SPI_TFT(PinName mosi, PinName miso, PinName sclk, PinName cs, PinName reset, const char *name)
+ : _spi(mosi, miso, sclk), _reset(reset),GraphicsDisplay(name) {
+ tft_reset();
+ orientation = 0;
+ char_x = 0;
+ if (mosi == p11 || mosi == P0_18) spi_port = 0; // we must know the used SPI port to setup the DMA
+ else spi_port = 1;
+}
+
+int SPI_TFT::width() {
+ if (orientation == 0 || orientation == 2) return 240;
+ else return 320;
+}
+
+
+int SPI_TFT::height() {
+ if (orientation == 0 || orientation == 2) return 320;
+ else return 240;
+}
+
+
+void SPI_TFT::set_orientation(unsigned int o) {
+ orientation = o;
+ switch (orientation) {
+ case 0:
+ wr_reg(0x16, 0x08);
+ break;
+ case 1:
+ wr_reg(0x16, 0x68);
+ break;
+ case 2:
+ wr_reg(0x16, 0xC8);
+ break;
+ case 3:
+ wr_reg(0x16, 0xA8);
+ break;
+ }
+ WindowMax();
+}
+
+
+// write command to tft register
+
+void SPI_TFT::wr_cmd(unsigned char cmd) {
+ unsigned short spi_d;
+ spi_d = 0x7000 | cmd ;
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_SSP0->DR = spi_d;
+ // we have to wait for SPI IDLE to get SSEL (CS) back to high
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI0 not idle
+ } else {
+ LPC_SSP1->DR = spi_d;
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ }
+
+}
+
+
+
+void SPI_TFT::wr_dat(unsigned char dat) {
+ unsigned short spi_d;
+ spi_d = 0x7200 | dat;
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_SSP0->DR = spi_d;
+ // we have to wait for SPI IDLE to get SSEL (CS) back to high
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI0 not idle
+ } else {
+ LPC_SSP1->DR = spi_d;
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ }
+}
+
+
+
+// the HX8347-D controller do not use the MISO (SDO) Signal.
+// The controller use the MOSI signal bidirectional.
+// To read from the controller we have to make some bit banging
+
+unsigned short SPI_TFT::rd_dat (void) {
+ unsigned short val = 0;
+
+ //val = _spi.write(0x73ff); /* Dummy read 1 */
+ //val = _spi.write(0x0000); /* Read D8..D15 */
+ return (val);
+}
+
+void SPI_TFT::wr_reg (unsigned char reg, unsigned char val) {
+ wr_cmd(reg);
+ wr_dat(val);
+}
+
+unsigned short SPI_TFT::rd_reg (unsigned char reg) {
+ wr_cmd(reg);
+ return(rd_dat());
+}
+
+void SPI_TFT::tft_reset() {
+ static unsigned short driverCode;
+ _spi.format(16,3); // 16 bit spi mode 3
+ _spi.frequency(48000000); // 48 Mhz SPI clock
+ _reset = 0; // display reset
+ if (spi_port == 0) { // TFT on SSP0
+ // Set up SSEL0 for CS
+ LPC_PINCON->PINSEL1 |= (1UL << 1);
+ } else {
+ // Set up SSEL1
+ LPC_PINCON->PINSEL0 |= (1UL << 13);
+ }
+ wait_us(50);
+ _reset = 1; // end reset
+ wait_ms(5);
+
+ /* Start Initial Sequence ----------------------------------------------------*/
+ wr_reg(0xEA, 0x00); /* Reset Power Control 1 */
+ wr_reg(0xEB, 0x20); /* Power Control 2 */
+ wr_reg(0xEC, 0x0C); /* Power Control 3 */
+ wr_reg(0xED, 0xC4); /* Power Control 4 */
+ wr_reg(0xE8, 0x40); /* Source OPON_N */
+ wr_reg(0xE9, 0x38); /* Source OPON_I */
+ wr_reg(0xF1, 0x01); /* */
+ wr_reg(0xF2, 0x10); /* */
+ wr_reg(0x27, 0xA3); /* Display Control 2 */
+
+ /* Power On sequence ---------------------------------------------------------*/
+ wr_reg(0x1B, 0x1B); /* Power Control 2 */
+ wr_reg(0x1A, 0x01); /* Power Control 1 */
+ wr_reg(0x24, 0x2F); /* Vcom Control 2 */
+ wr_reg(0x25, 0x57); /* Vcom Control 3 */
+ wr_reg(0x23, 0x8D); /* Vcom Control 1 */
+
+ /* Gamma settings -----------------------------------------------------------*/
+ wr_reg(0x40,0x00); //
+ wr_reg(0x41,0x00); //
+ wr_reg(0x42,0x01); //
+ wr_reg(0x43,0x13); //
+ wr_reg(0x44,0x10); //
+ wr_reg(0x45,0x26); //
+ wr_reg(0x46,0x08); //
+ wr_reg(0x47,0x51); //
+ wr_reg(0x48,0x02); //
+ wr_reg(0x49,0x12); //
+ wr_reg(0x4A,0x18); //
+ wr_reg(0x4B,0x19); //
+ wr_reg(0x4C,0x14); //
+ wr_reg(0x50,0x19); //
+ wr_reg(0x51,0x2F); //
+ wr_reg(0x52,0x2C); //
+ wr_reg(0x53,0x3E); //
+ wr_reg(0x54,0x3F); //
+ wr_reg(0x55,0x3F); //
+ wr_reg(0x56,0x2E); //
+ wr_reg(0x57,0x77); //
+ wr_reg(0x58,0x0B); //
+ wr_reg(0x59,0x06); //
+ wr_reg(0x5A,0x07); //
+ wr_reg(0x5B,0x0D); //
+ wr_reg(0x5C,0x1D); //
+ wr_reg(0x5D,0xCC); //
+
+ /* Power + Osc ---------------------------------------------------------------*/
+ wr_reg(0x18, 0x0036); /* OSC Control 1 */
+ wr_reg(0x19, 0x0001); /* OSC Control 2 */
+ wr_reg(0x01, 0x0000); /* Display Mode Control */
+ wr_reg(0x1F, 0x0088); /* Power Control 6 */
+ wait_ms(5); /* Delay 5 ms */
+ wr_reg(0x1F, 0x0080); /* Power Control 6 */
+ wait_ms(5); /* Delay 5 ms */
+ wr_reg(0x1F, 0x0090); /* Power Control 6 */
+ wait_ms(5); /* Delay 5 ms */
+ wr_reg(0x1F, 0x00D0); /* Power Control 6 */
+ wait_ms(5); /* Delay 5 ms */
+
+ wr_reg(0x17, 0x0005); /* Colmod 16Bit/Pixel */
+
+ wr_reg(0x36, 0x0000); /* Panel Characteristic */
+ wr_reg(0x28, 0x0038); /* Display Control 3 */
+ wait_ms(40);
+ wr_reg(0x28, 0x003C); /* Display Control 3 */
+ switch (orientation) {
+ case 0:
+ wr_reg(0x16, 0x0008);
+ break;
+ case 1:
+ wr_reg(0x16, 0x0068);
+ break;
+ case 2:
+ wr_reg(0x16, 0x00C8);
+ break;
+ case 3:
+ wr_reg(0x16, 0x00A8);
+ break;
+ }
+
+ // setup DMA channel 0
+ // Power up the GPDMA.
+ LPC_SC->PCONP |= (1UL << 29);
+ LPC_GPDMA->DMACConfig = 1; // enable DMA controller
+ // Reset the Interrupt status
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCLLI = 0;
+
+ WindowMax ();
+}
+
+
+
+
+void SPI_TFT::pixel(int x, int y, int color) {
+ unsigned char u,l;
+ wr_reg(0x03, (x >> 0));
+ wr_reg(0x02, (x >> 8));
+ wr_reg(0x07, (y >> 0));
+ wr_reg(0x06, (y >> 8));
+ wr_cmd(0x22);
+ u = color >> 8;
+ l = color & 0xff;
+
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->DR = 0x72; // start Data
+ LPC_SSP0->DR = u; // high byte
+ LPC_SSP0->DR = l; // low byte
+ LPC_SSP0->CR0 |= 0x08UL; // set back to 16 bit
+ // we have to wait for SPI IDLE to get SSEL (CS) back to high
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI0 not idle
+ } else {
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->DR = u;
+ LPC_SSP1->DR = l;
+ LPC_SSP1->CR0 |= 0x08UL; // set back to 16 bit
+ // we have to wait for SPI IDLE to get SSEL (CS) back to high
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ }
+}
+
+
+void SPI_TFT::window (unsigned int x, unsigned int y, unsigned int w, unsigned int h) {
+ wr_reg(0x03, x );
+ wr_reg(0x02, (x >> 8));
+ wr_reg(0x05, x+w-1 );
+ wr_reg(0x04, (x+w-1 >> 8));
+ wr_reg(0x07, y );
+ wr_reg(0x06, ( y >> 8));
+ wr_reg(0x09, ( y+h-1 ));
+ wr_reg(0x08, ( y+h-1 >> 8));
+}
+
+
+void SPI_TFT::WindowMax (void) {
+ window (0, 0, width(), height());
+}
+
+
+void SPI_TFT::cls (void) {
+ //unsigned int i
+
+ int pixel = ( width() * height());
+ int dma_count;
+ int color = _background;
+ WindowMax();
+ wr_cmd(0x22);
+
+ // The SSEL signal is held low until the spi FIFO is emty.
+ // We have to lower the SPI clock for the 8 bit start to get the spi running
+ // until the next data word
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t)&color;
+
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
+ /* Enable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x2;
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->CR0 |= 0x300UL; // clock div / 4 slow down to prevent a fifo emty
+ LPC_SSP0->DR = 0x72; // start byte
+ LPC_SSP0->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP0->CR0 &= ~(0x300UL); // reset clock div
+ } else {
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ /* Enable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x2;
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP1->CR0 &= ~(0x300UL); // reset clock div
+ }
+
+ // 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 ;
+ LPC_GPDMA->DMACSoftSReq = 0x1; // DMA request
+
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+
+ } while (pixel > 0);
+ if (spi_port == 0) { // TFT on SSP0
+ do {
+ } while ((0x0010 & LPC_SSP0->SR) == 0x10); // SPI FIFO not empty
+ /* disable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x0;
+ } else {
+ do {
+ } while ((0x0010 & LPC_SSP1->SR) == 0x10); // SPI FIFO not empty
+ /* disable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x0;
+ }
+
+}
+
+
+void SPI_TFT::circle(int x0, int y0, int r, int color) {
+
+ int draw_x0, draw_y0;
+ int draw_x1, draw_y1;
+ int draw_x2, draw_y2;
+ int draw_x3, draw_y3;
+ int draw_x4, draw_y4;
+ int draw_x5, draw_y5;
+ int draw_x6, draw_y6;
+ int draw_x7, draw_y7;
+ int xx, yy;
+ int di;
+ //WindowMax();
+ if (r == 0) { /* no radius */
+ return;
+ }
+
+ draw_x0 = draw_x1 = x0;
+ draw_y0 = draw_y1 = y0 + r;
+ if (draw_y0 < height()) {
+ pixel(draw_x0, draw_y0, color); /* 90 degree */
+ }
+
+ draw_x2 = draw_x3 = x0;
+ draw_y2 = draw_y3 = y0 - r;
+ if (draw_y2 >= 0) {
+ pixel(draw_x2, draw_y2, color); /* 270 degree */
+ }
+
+ draw_x4 = draw_x6 = x0 + r;
+ draw_y4 = draw_y6 = y0;
+ if (draw_x4 < width()) {
+ pixel(draw_x4, draw_y4, color); /* 0 degree */
+ }
+
+ draw_x5 = draw_x7 = x0 - r;
+ draw_y5 = draw_y7 = y0;
+ if (draw_x5>=0) {
+ pixel(draw_x5, draw_y5, color); /* 180 degree */
+ }
+
+ if (r == 1) {
+ return;
+ }
+
+ di = 3 - 2*r;
+ xx = 0;
+ yy = r;
+ while (xx < yy) {
+
+ if (di < 0) {
+ di += 4*xx + 6;
+ } else {
+ di += 4*(xx - yy) + 10;
+ yy--;
+ draw_y0--;
+ draw_y1--;
+ draw_y2++;
+ draw_y3++;
+ draw_x4--;
+ draw_x5++;
+ draw_x6--;
+ draw_x7++;
+ }
+ xx++;
+ draw_x0++;
+ draw_x1--;
+ draw_x2++;
+ draw_x3--;
+ draw_y4++;
+ draw_y5++;
+ draw_y6--;
+ draw_y7--;
+
+ if ( (draw_x0 <= width()) && (draw_y0>=0) ) {
+ pixel(draw_x0, draw_y0, color);
+ }
+
+ if ( (draw_x1 >= 0) && (draw_y1 >= 0) ) {
+ pixel(draw_x1, draw_y1, color);
+ }
+
+ if ( (draw_x2 <= width()) && (draw_y2 <= height()) ) {
+ pixel(draw_x2, draw_y2, color);
+ }
+
+ if ( (draw_x3 >=0 ) && (draw_y3 <= height()) ) {
+ pixel(draw_x3, draw_y3, color);
+ }
+
+ if ( (draw_x4 <= width()) && (draw_y4 >= 0) ) {
+ pixel(draw_x4, draw_y4, color);
+ }
+
+ if ( (draw_x5 >= 0) && (draw_y5 >= 0) ) {
+ pixel(draw_x5, draw_y5, color);
+ }
+ if ( (draw_x6 <=width()) && (draw_y6 <= height()) ) {
+ pixel(draw_x6, draw_y6, color);
+ }
+ if ( (draw_x7 >= 0) && (draw_y7 <= height()) ) {
+ pixel(draw_x7, draw_y7, color);
+ }
+ }
+ return;
+}
+
+void SPI_TFT::fillcircle(int x, int y, int r, int color) {
+ int i;
+ for (i = 0; i <= r; i++)
+ circle(x,y,i,color);
+}
+
+
+
+void SPI_TFT::hline(int x0, int x1, int y, int color) {
+ int w;
+ w = x1 - x0 + 1;
+ window(x0,y,w,1);
+ wr_cmd(0x22);
+
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
+ /* Enable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x2;
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP0->DR = 0x72; // start Data
+ LPC_SSP0->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP0->CR0 &= ~(0x300UL); // reset clock div
+ } else {
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ /* Enable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x2;
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP1->CR0 &= ~(0x300UL); // reset clock div
+ }
+
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t)&color;
+ LPC_GPDMACH0->DMACCControl = w | (1UL << 18) | (1UL << 21) | (1UL << 31) ; // 16 bit transfer , no address increment, interrupt
+ LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P ;
+ LPC_GPDMA->DMACSoftSReq = 0x1; // start DMA
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+ if (spi_port == 0) { // TFT on SSP0
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI FIFO not empty
+ } else {
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI FIFO not empty
+ }
+ WindowMax();
+ return;
+}
+
+void SPI_TFT::vline(int x, int y0, int y1, int color) {
+ int h;
+ h = y1 - y0 + 1;
+ window(x,y0,1,h);
+ wr_cmd(0x22);
+
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
+ /* Enable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x2;
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP0->DR = 0x72; // start Data
+ LPC_SSP0->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP0->CR0 &= ~(0x300UL); // reset clock div
+ } else {
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ /* Enable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x2;
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP1->CR0 &= ~(0x300UL); // reset clock div
+ }
+
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t)&color;
+ LPC_GPDMACH0->DMACCControl = h | (1UL << 18) | (1UL << 21) | (1UL << 31) ; // 16 bit transfer , no address increment, interrupt
+ LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P ;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+
+ if (spi_port == 0) { // TFT on SSP0
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI FIFO not empty
+ } else {
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI FIFO not empty
+ }
+ WindowMax();
+ return;
+}
+
+
+
+void SPI_TFT::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::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;
+}
+
+
+
+void SPI_TFT::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;
+ int dma_count;
+ window(x0,y0,w,h);
+ wr_cmd(0x22);
+
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
+ /* Enable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x2;
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP0->DR = 0x72; // start Data
+ LPC_SSP0->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP0->CR0 &= ~(0x300UL); // reset clock div
+ } else {
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ /* Enable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x2;
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP1->CR0 &= ~(0x300UL); // reset clock div
+ }
+
+ 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->DMACCSrcAddr = (uint32_t)&color;
+ 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 ;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+
+ } while (pixel > 0);
+
+ if (spi_port == 0) { // TFT on SSP0
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI FIFO not empty
+ } else {
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI FIFO not empty
+ }
+
+ WindowMax();
+ return;
+}
+
+
+void SPI_TFT::locate(int x, int y) {
+ char_x = x;
+ char_y = y;
+}
+
+
+
+int SPI_TFT::columns() {
+ return width() / font[1];
+}
+
+
+
+int SPI_TFT::rows() {
+ return height() / font[2];
+}
+
+
+
+int SPI_TFT::_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;
+}
+
+
+
+
+void SPI_TFT::character(int x, int y, int c) {
+ unsigned int hor,vert,offset,bpl,j,i,b,p;
+ unsigned char* zeichen;
+ unsigned char z,w;
+ unsigned int pixel;
+ unsigned int dma_count,dma_off;
+ uint16_t *buffer;
+
+ 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); // char box
+ wr_cmd(0x22);
+
+ pixel = hor * vert; // calculate buffer size
+
+ buffer = (uint16_t *) malloc (2*pixel); // we need a buffer for the 16 bit
+ if (buffer == NULL) {
+ //led = 1;
+ //pc.printf("Malloc error !\n\r");
+ return; // error no memory
+ }
+
+ zeichen = &font[((c -32) * offset) + 4]; // start of char bitmap
+ w = zeichen[0]; // width of actual char
+ p = 0;
+ // construct the char 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
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
+ /* Enable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x2;
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP0->DR = 0x72; // start Data
+ LPC_SSP0->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP0->CR0 &= ~(0x300UL); // reset clock div
+ } else {
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ /* Enable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x2;
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP1->CR0 &= ~(0x300UL); // reset clock div
+ }
+
+ // 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 ;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+ dma_off = dma_off + dma_count;
+ } while (pixel > 0);
+
+ free ((uint16_t *) buffer);
+
+ if (spi_port == 0) { // TFT on SSP0
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI0 not idle
+ /* disable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x0;
+ } else {
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ /* disable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x0;
+ }
+
+ WindowMax();
+ if ((w + 2) < hor) { // x offset to next char
+ char_x += w + 2;
+ } else char_x += hor;
+
+}
+
+
+void SPI_TFT::set_font(unsigned char* f) {
+ font = f;
+}
+
+
+
+void SPI_TFT::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;
+ // 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);
+ wr_cmd(0x22);
+
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
+ /* Enable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x2;
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP0->DR = 0x72; // start Data
+ LPC_SSP0->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP0->CR0 &= ~(0x300UL); // reset clock div
+ } else {
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ /* Enable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x2;
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP1->CR0 &= ~(0x300UL); // reset clock div
+ }
+ bitmap_ptr += ((h - 1)* (w + padd));
+ for (j = 0; j < h; j++) { //Lines
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t)bitmap_ptr;
+ LPC_GPDMACH0->DMACCControl = w | (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 ;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+
+ bitmap_ptr -= w;
+ bitmap_ptr -= padd;
+ }
+
+ if (spi_port == 0) { // TFT on SSP0
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI FIFO not empty
+ } else {
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI FIFO not empty
+ }
+
+ WindowMax();
+}
+
+
+int SPI_TFT::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
+ LocalFileSystem local("local");
+ sprintf(&filename[0],"/local/");
+ i=7;
+ while (*Name_BMP!='\0') {
+ filename[i++]=*Name_BMP++;
+ }
+
+ fprintf(stderr, "filename : %s \n\r",filename);
+
+
+ FILE *Image = fopen((const char *)&filename[0], "r"); // 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+1,PixelHeigh);
+ wr_cmd(0x22);
+
+ 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 !
+ if (spi_port == 0) { // TFT on SSP0
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP0->DR; // we send to SSP0
+ /* Enable SSP0 for DMA. */
+ LPC_SSP0->DMACR = 0x2;
+ LPC_SSP0->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP0->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP0->DR = 0x72; // start Data
+ LPC_SSP0->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP0->CR0 &= ~(0x300UL); // reset clock div
+ } else {
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ /* Enable SSP1 for DMA. */
+ LPC_SSP1->DMACR = 0x2;
+ LPC_SSP1->CR0 &= ~(0x08UL); // set to 8 bit
+ LPC_SSP1->CR0 |= 0x300UL; // clock div / 4
+ LPC_SSP1->DR = 0x72; // start Data
+ LPC_SSP1->CR0 |= 0x08UL; // set to 16 bit
+ LPC_SSP1->CR0 &= ~(0x300UL); // reset clock div
+ }
+
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t)line;
+ LPC_GPDMACH0->DMACCControl = PixelWidth | (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 ;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+
+ }
+
+ if (spi_port == 0) { // TFT on SSP0
+ do {
+ } while ((LPC_SSP0->SR & 0x10) == 0x10); // SPI FIFO not empty
+ } else {
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI FIFO not empty
+ }
+
+ free (line);
+ fclose(Image);
+ WindowMax();
+ return(1);
+}
\ No newline at end of file
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| Export to desktop IDE |
Repository details
| Type: | Library |
|---|---|
| Created: | 20 Sep 2012 |
| Imports: | 1048 |
| Forks: | 3 |
| Commits: | 19 |
| Dependents: | 7 |
| Dependencies: | 0 |
| Followers: | 37 |
| Issues: | 0 |
Components
TFT with HX8347D controller