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kedei_lcd_v50_pi.c
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kedei_lcd_v50_pi.c
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// Original code - KeDei V5.0 code - Conjur
// https://www.raspberrypi.org/forums/viewtopic.php?p=1019562
// Mon Aug 22, 2016 2:12 am - Final post on the KeDei v5.0 code.
// References code - Uladzimir Harabtsou l0nley
// https://github.com/l0nley/kedei35
//
// KeDei 3.5inch LCD V5.0 module for Raspberry Pi
// Modified by FREE WING, Y.Sakamoto
// http://www.neko.ne.jp/~freewing/
//
// gcc -o kedei_lcd_v50_pi kedei_lcd_v50_pi.c -lbcm2835
// sudo ./kedei_lcd_v50_pi
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/time.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <bcm2835.h>
#include <time.h>
#define LCD_CS 1
#define TOUCH_CS 0
#define LCD_WIDTH 480
#define LCD_HEIGHT 320
uint8_t lcd_rotations[4] = {
0b11101010, // 0
0b01001010, // 90
0b00101010, // 180
0b10001010 // 270
};
volatile uint8_t color;
volatile uint8_t lcd_rotation;
volatile uint16_t lcd_h;
volatile uint16_t lcd_w;
uint16_t colors[16] = {
0b0000000000000000, /* BLACK 000000 */
0b0000000000010000, /* NAVY 000080 */
0b0000000000011111, /* BLUE 0000ff */
0b0000010011000000, /* GREEN 009900 */
0b0000010011010011, /* TEAL 009999 */
0b0000011111100000, /* LIME 00ff00 */
0b0000011111111111, /* AQUA 00ffff */
0b1000000000000000, /* MAROON 800000 */
0b1000000000010000, /* PURPLE 800080 */
0b1001110011000000, /* OLIVE 999900 */
0b1000010000010000, /* GRAY 808080 */
0b1100111001111001, /* SILVER cccccc */
0b1111100000000000, /* RED ff0000 */
0b1111100000011111, /* FUCHSIA ff00ff */
0b1111111111100000, /* YELLOW ffff00 */
0b1111111111111111 /* WHITE ffffff */
};
void delayms(int ms) {
delay(ms);
}
int lcd_open(void) {
int r;
uint32_t v;
r = bcm2835_init();
if(r!=1) return -1;
bcm2835_spi_begin();
bcm2835_spi_setBitOrder(BCM2835_SPI_BIT_ORDER_MSBFIRST);
bcm2835_spi_setDataMode(BCM2835_SPI_MODE0);
// 8=NG
// 16=OK, 32=6MHz, 64=4MHz, 128=2MHz, 256=1.5MHz, 512=0.8MHz
bcm2835_spi_setClockDivider(BCM2835_SPI_CLOCK_DIVIDER_16);
bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS0, LOW);
bcm2835_spi_setChipSelectPolarity(BCM2835_SPI_CS1, LOW);
return 0;
}
int lcd_close(void) {
bcm2835_spi_end();
int r = bcm2835_close();
if(r!=1) return -1;
return 0;
}
void spi_transmit(int devsel, uint8_t *data, int len) {
if(devsel == 0)
{
bcm2835_spi_chipSelect(BCM2835_SPI_CS0);
} else {
bcm2835_spi_chipSelect(BCM2835_SPI_CS1);
}
bcm2835_spi_transfern((char*)data, len);
}
void lcd_rst(void) {
uint8_t buff[1];
buff[0] = 0x00;
spi_transmit(LCD_CS, &buff[0], sizeof(buff));
delayms(150);
buff[0] = 0x01;
spi_transmit(LCD_CS, &buff[0], sizeof(buff));
delayms(250);
}
void lcd_cmd(uint8_t cmd) {
uint8_t b1[2];
b1[0] = cmd>>1;
b1[1] = ((cmd&1)<<5) | 0x11;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
b1[0] = cmd>>1;
b1[1] = ((cmd&1)<<5) | 0x1B;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
}
void lcd_data(uint8_t dat) {
uint8_t b1[2];
b1[0] = dat>>1;
b1[1] = ((dat&1)<<5) | 0x15;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
b1[0] = dat>>1;
b1[1] = ((dat&1)<<5) | 0x1F;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
}
void lcd_color(uint16_t col) {
uint8_t b1[3];
// 18bit color mode ???
// 0xF800 R(R5-R1, DB17-DB13)
// 0x07E0 G(G5-G0, DB11- DB6)
// 0x001F B(B5-B1, DB5 - DB1)
// 0x40 = R(R0, DB12), 0x20 = B(B0, DB0)
// copy Red/Blue color bit1 to bit0
uint8_t pseud = ((col>>5) & 0x40) | ((col<<5) & 0x20);
b1[0]= col>>8;
b1[1]= col&0x00FF;
b1[2]= pseud | 0x15;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
b1[0]= col>>8;
b1[1]= col&0x00FF;
b1[2]= pseud | 0x1F;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
}
uint16_t colorRGB(uint8_t r, uint8_t g, uint8_t b) {
uint16_t col = ((r<<8) & 0xF800) | ((g<<3) & 0x07E0) | ((b>>3) & 0x001F);
// printf("%02x %02x %02x %04x\n", r, g, b, col);
return col;
}
// 18bit color mode
void lcd_colorRGB(uint8_t r, uint8_t g, uint8_t b) {
uint8_t b1[3];
uint16_t col = ((r<<8) & 0xF800) | ((g<<3) & 0x07E0) | ((b>>3) & 0x001F);
// 18bit color mode ???
// 0xF800 R(R5-R1, DB17-DB13)
// 0x07E0 G(G5-G0, DB11- DB6)
// 0x001F B(B5-B1, DB5 - DB1)
// 0x40 = R(R0, DB12), 0x20 = B(B0, DB0)
uint8_t pseud = ((r<<6) & 0x40) | ((b<<5) & 0x20);
b1[0]= col>>8;
b1[1]= col&0x00FF;
b1[2]= pseud | 0x15;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
b1[0]= col>>8;
b1[1]= col&0x00FF;
b1[2]= pseud | 0x1F;
spi_transmit(LCD_CS, &b1[0], sizeof(b1));
}
void lcd_setrotation(uint8_t m) {
lcd_cmd(0x36); lcd_data(lcd_rotations[m]);
if (m&1) {
lcd_h = LCD_WIDTH;
lcd_w = LCD_HEIGHT;
} else {
lcd_h = LCD_HEIGHT;
lcd_w = LCD_WIDTH;
}
}
void lcd_init(void) {
//reset display
lcd_rst();
/*
KeDei 3.5 inch 480x320 TFT lcd from ali
https://www.raspberrypi.org/forums/viewtopic.php?t=124961&start=162
by Conjur > Thu Aug 04, 2016 11:57 am
Initialize Parameter
<Pulse reset>
00
11
EE 02 01 02 01
ED 00 00 9A 9A 9B 9B 00 00 00 00 AE AE 01 A2 00
B4 00
C0 10 3B 00 02 11
C1 10
C8 00 46 12 20 0C 00 56 12 67 02 00 0C
D0 44 42 06
D1 43 16
D2 04 22
D3 04 12
D4 07 12
E9 00
C5 08
36 2A
3A 66
2A 00 00 01 3F
2B 00 00 01 E0
35 00
29
00
11
EE 02 01 02 01
ED 00 00 9A 9A 9B 9B 00 00 00 00 AE AF 01 A2 01 BF 2A
*/
lcd_cmd(0x00);
lcd_cmd(0x11);delayms(200); //Sleep Out
lcd_cmd(0xEE); lcd_data(0x02); lcd_data(0x01); lcd_data(0x02); lcd_data(0x01);
lcd_cmd(0xED); lcd_data(0x00); lcd_data(0x00); lcd_data(0x9A); lcd_data(0x9A); lcd_data(0x9B); lcd_data(0x9B); lcd_data(0x00); lcd_data(0x00); lcd_data(0x00); lcd_data(0x00); lcd_data(0xAE); lcd_data(0xAE); lcd_data(0x01); lcd_data(0xA2); lcd_data(0x00);
lcd_cmd(0xB4); lcd_data(0x00);
// LCD_WIDTH
lcd_cmd(0xC0); lcd_data(0x10); lcd_data(0x3B); lcd_data(0x00); lcd_data(0x02); lcd_data(0x11);
lcd_cmd(0xC1); lcd_data(0x10);
lcd_cmd(0xC8); lcd_data(0x00); lcd_data(0x46); lcd_data(0x12); lcd_data(0x20); lcd_data(0x0C); lcd_data(0x00); lcd_data(0x56); lcd_data(0x12); lcd_data(0x67); lcd_data(0x02); lcd_data(0x00); lcd_data(0x0C);
lcd_cmd(0xD0); lcd_data(0x44); lcd_data(0x42); lcd_data(0x06);
lcd_cmd(0xD1); lcd_data(0x43); lcd_data(0x16);
lcd_cmd(0xD2); lcd_data(0x04); lcd_data(0x22);
lcd_cmd(0xD3); lcd_data(0x04); lcd_data(0x12);
lcd_cmd(0xD4); lcd_data(0x07); lcd_data(0x12);
lcd_cmd(0xE9); lcd_data(0x00);
lcd_cmd(0xC5); lcd_data(0x08);
// 36 2A
lcd_setrotation(0);
lcd_cmd(0x3A); lcd_data(0x66); // RGB666 18bit color
// 2A 00 00 01 3F
// 2B 00 00 01 E0
lcd_cmd(0x35); lcd_data(0x00);
lcd_cmd(0x29);delayms(200); // Display On
lcd_cmd(0x00); // NOP
lcd_cmd(0x11);delayms(200); // Sleep Out
//
lcd_cmd(0xEE); lcd_data(0x02); lcd_data(0x01); lcd_data(0x02); lcd_data(0x01);
lcd_cmd(0xED); lcd_data(0x00); lcd_data(0x00); lcd_data(0x9A); lcd_data(0x9A); lcd_data(0x9B); lcd_data(0x9B); lcd_data(0x00); lcd_data(0x00); lcd_data(0x00); lcd_data(0x00); lcd_data(0xAE); lcd_data(0xAF); lcd_data(0x01); lcd_data(0xA2); lcd_data(0x01); lcd_data(0xBF); lcd_data(0x2A);
}
void lcd_setframe(uint16_t x, uint16_t y, uint16_t w, uint16_t h) {
lcd_cmd(0x2A);
lcd_data(x>>8); lcd_data(x&0xFF);
lcd_data(((w+x)-1)>>8); lcd_data(((w+x)-1)&0xFF);
lcd_cmd(0x2B);
lcd_data(y>>8); lcd_data(y&0xFF);
lcd_data(((h+y)-1)>>8); lcd_data(((h+y)-1)&0xFF);
lcd_cmd(0x2C);
}
//lcd_fillframe
//fills an area of the screen with a single color.
void lcd_fillframe(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint16_t col) {
int span=h*w;
lcd_setframe(x,y,w,h);
int q;
for(q=0;q<span;q++) { lcd_color(col); }
}
void lcd_fill(uint16_t col) {
lcd_fillframe(0, 0, lcd_w, lcd_h, col);
}
void lcd_fillframeRGB(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint8_t r, uint8_t g, uint8_t b) {
int span=h*w;
lcd_setframe(x,y,w,h);
int q;
for(q=0;q<span;q++) { lcd_colorRGB(r, g, b); }
}
void lcd_fillRGB(uint8_t r, uint8_t g, uint8_t b) {
lcd_fillframeRGB(0, 0, lcd_w, lcd_h, r, g, b);
}
void lcd_img(char *fname, uint16_t x, uint16_t y) {
uint8_t buf[54];
uint16_t p, c;
uint32_t isize, ioffset, iwidth, iheight, ibpp, fpos, rowbytes;
FILE *f = fopen(fname, "rb");
if (f != NULL) {
fseek(f, 0L, SEEK_SET);
fread(buf, 30, 1, f);
isize = buf[2] + (buf[3]<<8) + (buf[4]<<16) + (buf[5]<<24);
ioffset = buf[10] + (buf[11]<<8) + (buf[12]<<16) + (buf[13]<<24);
iwidth = buf[18] + (buf[19]<<8) + (buf[20]<<16) + (buf[21]<<24);
iheight = buf[22] + (buf[23]<<8) + (buf[24]<<16) + (buf[25]<<24);
ibpp = buf[28] + (buf[29]<<8);
printf("\n\n");
printf("File Size: %u\nOffset: %u\nWidth: %u\nHeight: %u\nBPP: %u\n\n",isize,ioffset,iwidth,iheight,ibpp);
lcd_setframe(x,y,iwidth,iheight); //set the active frame...
// Wrong calculationg bytes in row for bitmap. #1
rowbytes = (iwidth*3);
uint8_t d = (iwidth*3)%4;
if (d>0) { rowbytes += 4-d; }
for (p=iheight-1;p>0;p--) {
// p = relative page address (y)
fpos = ioffset+(p*rowbytes);
fseek(f, fpos, SEEK_SET);
for (c=0;c<iwidth;c++) {
// c = relative column address (x)
fread(buf, 3, 1, f);
// B buf[0]
// G buf[1]
// R buf[2]
// 18bit color mode
lcd_colorRGB(buf[2], buf[1], buf[0]);
}
}
fclose(f);
}
}
void loop() {
//Update rotation
lcd_setrotation(lcd_rotation);
//Fill entire screen with new color
lcd_fillframe(0,0,lcd_w,lcd_h,colors[color]);
//Make a color+1 box, 5 pixels from the top-left corner, 20 pixels high, 95 (100-5) pixels from right border.
lcd_fillframe(5,5,lcd_w-100,20,colors[(color+1) & 0xF]);
//increment color
color++;
//if color is overflowed, reset to 0
if (color==16) {color=0;}
//increment rotation
lcd_rotation++;
//if rotation is overflowed, reset to 0
if (lcd_rotation==4) lcd_rotation=0;
delayms(500);
}
int main(int argc,char *argv[]) {
lcd_open();
lcd_init();
lcd_fill(0); //black out the screen.
// 24bit Bitmap only
lcd_img("kedei_lcd_v50_pi.bmp", 50, 5);
delayms(500);
lcd_fillRGB(0xFF, 0x00, 0x00);
lcd_fillRGB(0x00, 0xFF, 0x00);
lcd_fillRGB(0xFF, 0xFF, 0x00);
lcd_fillRGB(0x00, 0x00, 0xFF);
lcd_fillRGB(0xFF, 0x00, 0xFF);
lcd_fillRGB(0x00, 0xFF, 0xFF);
lcd_fillRGB(0xFF, 0xFF, 0xFF);
lcd_fillRGB(0x00, 0x00, 0x00);
// 24bit Bitmap only
lcd_img("kedei_lcd_v50_pi.bmp", 50, 5);
delayms(500);
// Demo
color=0;
lcd_rotation=0;
loop(); loop(); loop(); loop();
loop(); loop(); loop(); loop();
loop(); loop(); loop(); loop();
loop(); loop(); loop(); loop();
loop();
// 24bit Bitmap only
lcd_img("kedei_lcd_v50_pi.bmp", 50, 5);
lcd_close();
}