Tim Dennis
Lib for the LCD display on mbed lab Board
Diff: C12832_lcd.cpp
- Revision:
- 0:4bbc531be6e2
- Child:
- 1:66dd8afbfd06
diff -r 000000000000 -r 4bbc531be6e2 C12832_lcd.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/C12832_lcd.cpp Tue Oct 16 14:05:57 2012 +0000
@@ -0,0 +1,577 @@
+/* mbed library for the mbed Lab Board 128*32 pixel LCD
+ * use C12832 controller
+ * Copyright (c) 2012 Peter Drescher - DC2PD
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * 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.
+ */
+
+// 13.10.12 initial design
+// optional defines :
+#define debug_lcd 1
+
+#include "C12832_lcd.h"
+#include "mbed.h"
+#include "stdio.h"
+
+#define BPP 1 // Bits per pixel
+
+C12832_LCD::C12832_LCD(const char* name)
+ : _spi(p5,NC,p7),_reset(p6),_A0(p8),_CS(p11),GraphicsDisplay(name)
+{
+ orientation = 1;
+ draw_mode = NORMAL;
+ char_x = 0;
+ lcd_reset();
+}
+
+int C12832_LCD::width()
+{
+ if (orientation == 0 || orientation == 2) return 32;
+ else return 128;
+}
+
+int C12832_LCD::height()
+{
+ if (orientation == 0 || orientation == 2) return 128;
+ else return 32;
+}
+
+
+void C12832_LCD::set_orientation(unsigned int o)
+{
+ orientation = o;
+ switch (o) {
+ case (0):
+ wr_cmd(0xA0);
+ wr_cmd(0xC0);
+ break;
+ case (1):
+ wr_cmd(0xA0);
+ wr_cmd(0xC8);
+ break;
+ case (2):
+ wr_cmd(0xA1);
+ wr_cmd(0xC8);
+ break;
+ case (3):
+ wr_cmd(0xA1);
+ wr_cmd(0xC0);
+ break;
+ }
+}
+
+void C12832_LCD::invert(unsigned int o)
+{
+ if(o == 0) wr_cmd(0xA6);
+ else wr_cmd(0xA7);
+}
+
+
+void C12832_LCD::set_contrast(unsigned int o)
+{
+ wr_cmd(0x81); // set volume
+ wr_cmd(o & 0x2F);
+}
+
+
+// write command to lcd controller
+
+void C12832_LCD::wr_cmd(unsigned char cmd)
+{
+ _A0 = 0;
+ _CS = 0;
+ LPC_SSP1->DR = cmd;
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // wait for SPI1 idle
+ _CS = 1;
+}
+
+// write data to lcd controller
+
+void C12832_LCD::wr_dat(unsigned char dat)
+{
+ _A0 = 1;
+ _CS = 0;
+ LPC_SSP1->DR = dat;
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // wait for SPI1 idle
+ _CS = 1;
+}
+
+// reset and init the lcd controller
+
+void C12832_LCD::lcd_reset()
+{
+
+ _spi.format(8,3); // 8 bit spi mode 3
+ _spi.frequency(20000000); // 19,2 Mhz SPI clock
+ DigitalOut _reset(p6);
+ _A0 = 0;
+ _CS = 1;
+ _reset = 0; // display reset
+ wait_us(50);
+ _reset = 1; // end reset
+ wait_ms(5);
+
+ /* Start Initial Sequence ----------------------------------------------------*/
+
+ wr_cmd(0xAE); // display off
+ wr_cmd(0xA2); // bias voltage
+
+ wr_cmd(0xA0);
+ wr_cmd(0xC8); // colum normal
+
+ wr_cmd(0x22); // voltage resistor ratio
+ wr_cmd(0x2F); // power on
+ wr_cmd(0xA4); // LCD display ram
+ wr_cmd(0x40); // start line = 0
+ wr_cmd(0xAF); // display ON
+
+ wr_cmd(0x81); // set contrast
+ wr_cmd(0x17); // set contrast
+
+ wr_cmd(0xA6); // display normal
+
+ //setup DMA channel 0
+ LPC_SC->PCONP |= (1UL << 29); // Power up the GPDMA
+ LPC_GPDMA->DMACConfig = 1; // enable DMA controller
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCLLI = 0;
+ // clear and update LCD
+ memset(buffer,0x00,512); // clear display buffer
+ copy_to_lcd();
+}
+
+// set one pixel in buffer
+
+void C12832_LCD::pixel(int x, int y, int color)
+{
+ // first check parameter
+ if(x > 128 || y > 32 || x < 0 || y < 0) return;
+
+ if(draw_mode == NORMAL) {
+ if(color == 0)
+ buffer[x + ((y/8) * 128)] &= ~(1 << (y%8)); // erase pixel
+ else
+ buffer[x + ((y/8) * 128)] |= (1 << (y%8)); // set pixel
+ } else { // XOR mode
+ if(color == 1)
+ buffer[x + ((y/8) * 128)] ^= (1 << (y%8)); // xor pixel
+ }
+}
+
+// update lcd
+
+void C12832_LCD::copy_to_lcd(void)
+{
+ //page 0
+ wr_cmd(0x00); // set column low nibble 0
+ wr_cmd(0x10); // set column hi nibble 0
+ wr_cmd(0xB0); // set page address 0
+ _CS = 0;
+ _A0 = 1;
+ // start 128 byte DMA transfer to SPI1
+ LPC_GPDMACH0->DMACCDestAddr = (uint32_t)&LPC_SSP1->DR; // we send to SSP1
+ LPC_SSP1->DMACR = 0x2; // Enable SSP1 for DMA.
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t) (buffer);
+ LPC_GPDMACH0->DMACCControl = 128 | (1UL << 31) | DMA_CHANNEL_SRC_INC ; // 8 bit transfer , address increment, interrupt
+ LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P | DMA_DEST_SSP1_TX;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ _CS = 1;
+
+ // page 1
+ wr_cmd(0x00); // set column low nibble 0
+ wr_cmd(0x10); // set column hi nibble 0
+ wr_cmd(0xB1); // set page address 1
+ _CS = 0;
+ _A0 = 1;
+ // start 128 byte DMA transfer to SPI1
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t) (buffer + 128);
+ LPC_GPDMACH0->DMACCControl = 128 | (1UL << 31) | DMA_CHANNEL_SRC_INC ; // 8 bit transfer , address increment, interrupt
+ LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P | DMA_DEST_SSP1_TX;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ _CS = 1;
+
+ //page 2
+ wr_cmd(0x00); // set column low nibble 0
+ wr_cmd(0x10); // set column hi nibble 0
+ wr_cmd(0xB2); // set page address 2
+ _CS = 0;
+ _A0 = 1;
+ // start 128 byte DMA transfer to SPI1
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t) (buffer + 256);
+ LPC_GPDMACH0->DMACCControl = 128 | (1UL << 31) | DMA_CHANNEL_SRC_INC ; // 8 bit transfer , address increment, interrupt
+ LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P | DMA_DEST_SSP1_TX ;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ _CS = 1;
+
+ //page 3
+ wr_cmd(0x00); // set column low nibble 0
+ wr_cmd(0x10); // set column hi nibble 0
+ wr_cmd(0xB3); // set page address 3
+ _CS = 0;
+ _A0 = 1;
+ // start 128 byte DMA transfer to SPI1
+ LPC_GPDMA->DMACIntTCClear = 0x1;
+ LPC_GPDMA->DMACIntErrClr = 0x1;
+ LPC_GPDMACH0->DMACCSrcAddr = (uint32_t) (buffer + 384);
+ LPC_GPDMACH0->DMACCControl = 128 | (1UL << 31) | DMA_CHANNEL_SRC_INC ; // 8 bit transfer , address increment, interrupt
+ LPC_GPDMACH0->DMACCConfig = DMA_CHANNEL_ENABLE | DMA_TRANSFER_TYPE_M2P | DMA_DEST_SSP1_TX;
+ LPC_GPDMA->DMACSoftSReq = 0x1;
+ do {
+ } while ((LPC_GPDMA->DMACRawIntTCStat & 0x01) == 0); // DMA is running
+ do {
+ } while ((LPC_SSP1->SR & 0x10) == 0x10); // SPI1 not idle
+ _CS = 1;
+}
+
+void C12832_LCD::cls(void)
+{
+ memset(buffer,0x00,512); // clear display buffer
+ copy_to_lcd();
+}
+
+
+void C12832_LCD::line(int x0, int y0, int x1, int y1, int color)
+{
+ 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 C12832_LCD::rect(int x0, int y0, int x1, int y1, int color)
+{
+
+ if (x1 > x0) line(x0,y0,x1,y0,color);
+ else line(x1,y0,x0,y0,color);
+
+ if (y1 > y0) line(x0,y0,x0,y1,color);
+ else line(x0,y1,x0,y0,color);
+
+ if (x1 > x0) line(x0,y1,x1,y1,color);
+ else line(x1,y1,x0,y1,color);
+
+ if (y1 > y0) line(x1,y0,x1,y1,color);
+ else line(x1,y1,x1,y0,color);
+
+ return;
+}
+
+void C12832_LCD::fillrect(int x0, int y0, int x1, int y1, int color)
+{
+ int l,c,i;
+ if(x0 > x1) {
+ i = x0;
+ x0 = x1;
+ x1 = i;
+ }
+
+ if(y0 > y1) {
+ i = y0;
+ y0 = y1;
+ y1 = i;
+ }
+
+ for(l = x0; l<= x1; l ++) {
+ for(c = y0; c<= y1; c++) {
+ pixel(l,c,color);
+ }
+ }
+}
+
+
+
+void C12832_LCD::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 C12832_LCD::fillcircle(int x, int y, int r, int color)
+{
+ int i;
+ for (i = 0; i <= r; i++)
+ circle(x,y,i,color);
+}
+
+void C12832_LCD::setmode(int mode)
+{
+ draw_mode = mode;
+}
+
+void C12832_LCD::locate(int x, int y)
+{
+ char_x = x;
+ char_y = y;
+}
+
+
+
+int C12832_LCD::columns()
+{
+ return width() / font[1];
+}
+
+
+
+int C12832_LCD::rows()
+{
+ return height() / font[2];
+}
+
+
+
+int C12832_LCD::_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 C12832_LCD::character(int x, int y, int c)
+{
+ unsigned int hor,vert,offset,bpl,j,i,b;
+ unsigned char* zeichen;
+ unsigned char z,w;
+
+ 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;
+ }
+ }
+
+ zeichen = &font[((c -32) * offset) + 4]; // start of char bitmap
+ w = zeichen[0]; // width of actual char
+ // 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) {
+ pixel(x+i,y+j,0);
+ } else {
+ pixel(x+i,y+j,1);
+ }
+
+ }
+ }
+
+ char_x += w;
+}
+
+
+void C12832_LCD::set_font(unsigned char* f)
+{
+ font = f;
+}
+
+
+