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
Revision 12:b2dd49f04d5d, committed 2012-04-07
- Comitter:
- dreschpe
- Date:
- Sat Apr 07 16:05:39 2012 +0000
- Parent:
- 11:3cfa9bb9b070
- Child:
- 13:d525819cb601
- Commit message:
- Use DMA and direct access to SPI register to speed up to 6 times.
Changed in this revision
| SPI_TFT.cpp | Show annotated file Show diff for this revision Revisions of this file |
| SPI_TFT.h | Show annotated file Show diff for this revision Revisions of this file |
--- a/SPI_TFT.cpp Sun Jan 01 23:38:13 2012 +0000
+++ b/SPI_TFT.cpp Sat Apr 07 16:05:39 2012 +0000
@@ -9,11 +9,15 @@
* 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
+
+
+// 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"
@@ -22,13 +26,17 @@
#define BPP 16 // Bits per pixel
-//DigitalOut led(LED1);
+
+//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), _cs(cs), _reset(reset),GraphicsDisplay(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() {
@@ -43,131 +51,118 @@
}
-
void SPI_TFT::set_orientation(unsigned int o) {
orientation = o;
switch (orientation) {
case 0:
- wr_reg(0x16, 0x0008);
+ wr_reg(0x16, 0x08);
break;
case 1:
- wr_reg(0x16, 0x0068);
+ wr_reg(0x16, 0x68);
break;
case 2:
- wr_reg(0x16, 0x00C8);
+ wr_reg(0x16, 0xC8);
break;
case 3:
- wr_reg(0x16, 0x00A8);
+ wr_reg(0x16, 0xA8);
break;
}
- WindowMax();
+ WindowMax();
}
-
-void SPI_TFT::wr_cmd(int cmd) {
- _cs = 0;
- _spi.write(SPI_START | SPI_WR | SPI_INDEX); /* Write : RS = 0, RW = 0 */
- _spi.write(cmd);
- _cs = 1;
-}
-
-
+// write command to tft register
-void SPI_TFT::wr_dat(int dat) {
- _cs = 0;
- _spi.write(SPI_START | SPI_WR | SPI_DATA); // Write : RS = 1, RW = 0
- _spi.format(16,3); // switch to 16 bit Mode 3
- _spi.write(dat); // Write D0..D15
- _spi.format(8,3); // 8 bit Mode 3
- _cs = 1;
-}
-
+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_start(void) {
- _cs = 0;
- _spi.write(SPI_START | SPI_WR | SPI_DATA); /* Write : RS = 1, RW = 0 */
-}
-
-
-
-void SPI_TFT::wr_dat_stop (void) {
- _cs = 1;
}
-void SPI_TFT::wr_dat_only (unsigned short dat) {
-
- _spi.format(16,3); // switch to 16 bit Mode 3
- _spi.write(dat); // Write D0..D15
- _spi.format(8,3); // 8 bit Mode 3
-}
-
-
-
-unsigned short SPI_TFT::rd_dat (void) {
- unsigned short val = 0;
-
- _cs = 0;
- _spi.write(SPI_START | SPI_RD | SPI_DATA); /* Read: RS = 1, RW = 1 */
- _spi.write(0); /* Dummy read 1 */
- val = _spi.write(0); /* Read D8..D15 */
- val <<= 8;
- val |= _spi.write(0); /* Read D0..D7 */
- _cs = 1;
- return (val);
-}
-
-
-
-void SPI_TFT::wr_reg (unsigned char reg, unsigned short val) {
-
- wr_cmd(reg);
- wr_dat(val);
+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(8,3); // 8 bit spi mode 3
- _spi.frequency(48000000); // 48Mhz SPI clock
- _reset = 0; // reset
- _cs = 1;
+ _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);
- driverCode = rd_reg(0x00); // read controller ID
- //printf("Disp_ID = %x",driverCode);
-
/* Start Initial Sequence ----------------------------------------------------*/
- wr_reg(0xEA, 0x0000); /* Reset Power Control 1 */
- wr_reg(0xEB, 0x0020); /* Power Control 2 */
- wr_reg(0xEC, 0x000C); /* Power Control 3 */
- wr_reg(0xED, 0x00C4); /* Power Control 4 */
- wr_reg(0xE8, 0x0040); /* Source OPON_N */
- wr_reg(0xE9, 0x0038); /* Source OPON_I */
- wr_reg(0xF1, 0x0001); /* */
- wr_reg(0xF2, 0x0010); /* */
- wr_reg(0x27, 0x00A3); /* Display Control 2 */
+ 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, 0x001B); /* Power Control 2 */
- wr_reg(0x1A, 0x0001); /* Power Control 1 */
- wr_reg(0x24, 0x002F); /* Vcom Control 2 */
- wr_reg(0x25, 0x0057); /* Vcom Control 3 */
- wr_reg(0x23, 0x008D); /* Vcom Control 1 */
+ 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); //
@@ -232,6 +227,15 @@
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 ();
}
@@ -239,31 +243,46 @@
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_reg(0x05, (x+1 >> 0));
- //wr_reg(0x04, (x+1 >> 8));
- //wr_reg(0x09, (y+1 >> 0));
- //wr_reg(0x08, (y+1 >> 8));
wr_cmd(0x22);
- wr_dat(color);
+ 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 >> 0));
+ wr_reg(0x03, x );
wr_reg(0x02, (x >> 8));
- wr_reg(0x05, (x+w-1 >> 0));
+ wr_reg(0x05, x+w-1 );
wr_reg(0x04, (x+w-1 >> 8));
- wr_reg(0x07, ( y >> 0));
+ wr_reg(0x07, y );
wr_reg(0x06, ( y >> 8));
- wr_reg(0x09, ( y+h-1 >> 0));
+ wr_reg(0x09, ( y+h-1 ));
wr_reg(0x08, ( y+h-1 >> 8));
- //wr_cmd(0x22);
}
@@ -273,15 +292,70 @@
void SPI_TFT::cls (void) {
- unsigned int i;
+ //unsigned int i
+
+ int pixel = ( width() * height());
+ int dma_count;
+ int color = _background;
WindowMax();
wr_cmd(0x22);
- wr_dat_start();
- _spi.format(16,3); // 16 bit Mode 3
- for (i = 0; i < ( width() * height()); i++)
- _spi.write(_background);
- _spi.format(8,3); // 8 bit Mode 3
- wr_dat_stop();
+
+ // 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;
+ }
+
}
@@ -405,31 +479,88 @@
w = x1 - x0 + 1;
window(x0,y,w,1);
wr_cmd(0x22);
- wr_dat_start();
- _spi.format(16,3); // pixel are send in 16 bit mode to speed up
- for (int x=0; x<w; x++) {
- _spi.write(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
+ 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
}
- _spi.format(8,3);
- wr_dat_stop();
+
+ 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);
- wr_dat_start();
- _spi.format(16,3); // pixel are send in 16 bit mode to speed up
- for (int y=0; y<h; y++) {
- _spi.write(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
+ 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
}
- _spi.format(8,3);
- wr_dat_stop();
+
+ 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;
}
@@ -507,8 +638,6 @@
}
-
-
void SPI_TFT::rect(int x0, int y0, int x1, int y1, int color) {
if (x1 > x0) hline(x0,x1,y0,color);
@@ -533,21 +662,62 @@
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);
- wr_dat_start();
- _spi.format(16,3); // pixel are send in 16 bit mode to speed up
- for (int p=0; p<pixel; p++) {
- _spi.write(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
+ 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
}
- _spi.format(8,3);
- wr_dat_stop();
+
+ 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;
@@ -576,7 +746,7 @@
}
} else {
character(char_x, char_y, value);
- }
+ }
return value;
}
@@ -584,9 +754,12 @@
void SPI_TFT::character(int x, int y, int c) {
- unsigned int hor,vert,offset,bpl,j,i,b;
+ 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
@@ -599,41 +772,104 @@
if (char_x + hor > width()) {
char_x = 0;
char_y = char_y + vert;
- if (char_y >= height() - font[2]) {
+ if (char_y >= height() - font[2]) {
char_y = 0;
}
}
-
window(char_x, char_y,hor,vert); // char box
wr_cmd(0x22);
- wr_dat_start();
+
+ 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
- _spi.format(16,3); // pixel are 16 bit
-
+ 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) {
- _spi.write(_background);
+ buffer[p] = _background;
} else {
- _spi.write(_foreground);
+ buffer[p] = _foreground;
}
+ p++;
}
}
- _spi.format(8,3); // 8 bit
- wr_dat_stop();
+
+
+ // 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;
}
@@ -641,29 +877,59 @@
void SPI_TFT::Bitmap(unsigned int x, unsigned int y, unsigned int w, unsigned int h,unsigned char *bitmap) {
- unsigned int i,j,padd;
+ unsigned int j;
+ int padd;
unsigned short *bitmap_ptr = (unsigned short *)bitmap;
- // the lines are padded to multiple of 4 bytes in a 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);
- wr_dat_start();
- _spi.format(16,3);
+
+ 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));
- //bitmap_ptr -= padd;
for (j = 0; j < h; j++) { //Lines
- for (i = 0; i < w; i++) { // copy pixel data to TFT
- _spi.write(*bitmap_ptr); // one line
- bitmap_ptr++;
- }
- bitmap_ptr -= 2*w;
+ 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;
}
- _spi.format(8,3);
- wr_dat_stop();
+
+ 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();
}
@@ -691,6 +957,10 @@
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 !
@@ -718,31 +988,64 @@
start_data = BMP_Header[OffsetPixData] + (BMP_Header[OffsetPixData + 1] << 8) + (BMP_Header[OffsetPixData + 2] << 16) + (BMP_Header[OffsetPixData + 3] << 24);
- line = (unsigned short *) malloc (PixelWidth); // we need a buffer for a line
+
+ line = (unsigned short *) malloc (2 * PixelWidth); // we need a buffer for a line
if (line == NULL) {
return(-4); // error no memory
}
- // the lines are padded to multiple of 4 bytes
+ // 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);
+ window(x, y,PixelWidth+1,PixelHeigh);
wr_cmd(0x22);
- wr_dat_start();
- _spi.format(16,3);
+
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
- _spi.write(line[i]); // one 16 bit pixel
- }
+ 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
+
}
- _spi.format(8,3);
- wr_dat_stop();
+
+ 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();
--- a/SPI_TFT.h Sun Jan 01 23:38:13 2012 +0000
+++ b/SPI_TFT.h Sat Apr 07 16:05:39 2012 +0000
@@ -51,6 +51,17 @@
#define GreenYellow 0xAFE5 /* 173, 255, 47 */
+// 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)
+
+
/** Display control class, based on GraphicsDisplay and TextDisplay
*
* Example:
@@ -118,7 +129,7 @@
* @param y vertical position
* @param color 16 bit pixel color
*/
- virtual void pixel(int x, int y, int colour);
+ virtual void pixel(int x, int y,int colour);
/** draw a circle
*
@@ -280,7 +291,7 @@
void set_orientation(unsigned int o);
SPI _spi;
- DigitalOut _cs;
+ // DigitalOut _cs; we use SSEL0/1
DigitalOut _reset;
unsigned char* font;
@@ -335,24 +346,25 @@
* @param dat data written to LCD controller
*
*/
- void wr_dat(int value);
+ //void wr_dat(unsigned int value);
+ void wr_dat(unsigned char value);
/** Write a command the LCD controller
*
* @param cmd: command to be written
*
*/
- void wr_cmd(int value);
+ void wr_cmd(unsigned char value);
/** Start data sequence to the LCD controller
*
*/
- void wr_dat_start();
+ //void wr_dat_start();
/** Stop of data writing to the LCD controller
*
*/
- void wr_dat_stop();
+ //void wr_dat_stop();
/** write data to the LCD controller
*
@@ -373,7 +385,7 @@
* @param reg register to be written
* @param val data to be written
*/
- void wr_reg (unsigned char reg, unsigned short val);
+ void wr_reg (unsigned char reg, unsigned char val);
/** Read a LCD register
*
@@ -382,6 +394,7 @@
*/
unsigned short rd_reg (unsigned char reg);
+ unsigned char spi_port;
unsigned int orientation;
unsigned int char_x;
unsigned int char_y;