Closed yafengabc closed 7 years ago
yafengabc
commented
8 years ago i read the ILI9481 s datasheet i found this chip need use IM0 IM1 IM2 to select the interface type if this three pins is 1 0 1,the data need 9bit,and the first bit means D(data)/CX(command) if this three pins is 1 1 1 the data is 8bit and use single DC pin to select command/data is there any way to use 9bit data type?
notro
commented
8 years ago From the top of my head: fbtft_device custom width= height= buswidth=9 ...
Source: http://lxr.free-electrons.com/source/drivers/staging/fbtft/fbtft_device.c
notro
commented
7 years ago Closing issue since there has been no activity in a long time. Reopen if needed.
I have an 3.5inch IPS LCD，and the controler is ili9481 the screen only 6 pins 3.3V GND SCL SDA RST CS
and not dc（or RS）pin i connected SDA to MOSI （GPIO10） SCL to CLK（GPIO11） CS to CE0 （GPIO08） RST to GPIO25 and use： sudo modprobe fbtft_device debug=3 rotate=90 name=ili9481 speed=12000000 gpios=reset:25,dc:24,cs:8
but the screen not view any things the dmesg info is: [ 172.199885] spidev spi0.0: spidev spi0.0 500kHz 8 bits mode=0x00 [ 172.209993] spidev spi0.1: spidev spi0.1 500kHz 8 bits mode=0x00 [ 172.219739] bcm2708_fb soc:fb: soc:fb id=-1 pdata? no [ 172.228507] spidev spi0.0: Deleting spi0.0 [ 172.237128] fbtft_device: GPIOS used by 'ili9481': [ 172.245955] fbtft_device: 'reset' = GPIO25 [ 172.252247] fb_ili9481: module is from the staging directory, the quality is unknown, you have been warned. [ 172.253723] fb_ili9481 spi0.0: fbtft_request_gpios: 'reset' = GPIO25 [ 172.253752] fb_ili9481 spi0.0: fbtft_request_gpios: 'dc' = GPIO24 [ 172.253778] fb_ili9481 spi0.0: fbtft_request_gpios: 'cs' = GPIO8 [ 172.253798] fb_ili9481 spi0.0: fbtft_verify_gpios() [ 172.253810] fb_ili9481 spi0.0: fbtft_reset() [ 172.317034] fbtft_device: 'dc' = GPIO24 [ 172.324503] fbtft_device: 'cs' = GPIO8 [ 172.331923] spidev spi0.1: spidev spi0.1 500kHz 8 bits mode=0x00 [ 172.341635] fb_ili9481 spi0.0: fb_ili9481 spi0.0 12000kHz 8 bits mode=0x00 [ 172.373878] fb_ili9481 spi0.0: init: write(0x11) [ 172.382167] fb_ili9481 spi0.0: init: mdelay(50) [ 172.440062] fb_ili9481 spi0.0: init: write(0xD0) 0x07 0x42 0x18 [ 172.449605] fb_ili9481 spi0.0: init: write(0xD1) 0x00 0x07 0x10 [ 172.458892] fb_ili9481 spi0.0: init: write(0xD2) 0x01 0x02 [ 172.467945] fb_ili9481 spi0.0: init: write(0xC0) 0x10 0x3B 0x00 0x02 0x11 [ 172.477918] fb_ili9481 spi0.0: init: write(0xC5) 0x03 [ 172.486056] fb_ili9481 spi0.0: init: write(0x3A) 0x55 [ 172.493939] fb_ili9481 spi0.0: init: write(0xC8) 0x00 0x32 0x36 0x45 0x06 0x16 0x37 0x75 0x77 0x54 0x0C 0x00 [ 172.509725] fb_ili9481 spi0.0: init: write(0x29) [ 172.738607] fb_ili9481 spi0.0: Display update: 1356 kB/s, fps=0 [ 172.747847] fb_ili9481 spi0.0: fbtft_register_backlight(): led pin not set, exiting. [ 172.759395] graphics fb1: fb_ili9481 frame buffer, 480x320, 300 KiB video memory, 4 KiB DMA buffer memory, fps=20, spi0.0 at 12 MHz
there has an example C51 program only use 4pins to control it：
include
include
include
sbit CSB = P3^3; sbit RESETB = P3^4; sbit SDA = P3^5; sbit SCL = P3^6;
sbit KEY = P3^2;
void LCD_INIT_ILI9481(void); void LCD_WRITE_DATA_dis(char colorH,char colorL); void LCD_TEST_SingleColor_16BPP(char colorH,char colorL); void LCD_TEST_SingleColor(char colorH,char colorz,char colorL); void LCD_WRITE_CMD(char cmd1); void LCD_WRITE_DATA(char dataa); void LCD_TEST_barColor(); void HD_reset(void); void Keypress(void);
void delayms(int value); void delayus(int value1); unsigned char code barcolor[];
unsigned char code barcolor[]={ 0Xff,0X00,0X00,0X00,0Xff,0X00,0X00,0X00,0Xff,0Xff,0Xff,0Xff,0X00,0X00,0X00,0Xff, 0Xff,0X00,0X00,0Xff,0Xff,0Xff,0X00,0Xff, };
void main(){
/* LCD_TEST_SingleColor(0xff,0x00,0x00); //display red
*/ // LCD_TEST_SingleColor_16BPP(0xf8,0x00); // Keypress(); // LCD_TEST_SingleColor_16BPP(0x07,0xE0); //Keypress(); // LCD_TEST_SingleColor_16BPP(0x00,0x1F); //Keypress(); LCD_TEST_barColor(); //Keypress(); } }
void HD_reset(){ RESETB=1; delayms(1); RESETB=0; delayms(10); RESETB=1; delayms(100); }
void LCD_INIT_ILI9481(void) {
// LCD_WRITE_CMD(0x21);
//-------------------------------9 bit chansfer------------ void LCD_WRITE_CMD(char cmd1) { unsigned char nub;
}
void LCD_WRITE_DATA(char dataa) { unsigned char nub;
}
//--------------------16bp218bp-------------- void LCD_WRITE_DATA_dis(char colorH,char colorL) { LCD_WRITE_DATA(colorH&0xf8); LCD_WRITE_DATA(((colorH&0x07)<<5)+((colorL&0xe0)>>3)); LCD_WRITE_DATA((colorL&0x1f)<<3); }
void LCD_TEST_SingleColor(char colorH,char colorz,char colorL){ int i,j;
//##########################红，绿，蓝，黄，橙，黑，白。紫############ void LCD_TEST_barColor(){ int i,j,k=0,p;
void LCD_TEST_SingleColor_16BPP(char colorH,char colorL){ int i,j;
void Keypress() { while(KEY) delayms(10); }
void delayms(int value) { while (value){ delayus(99); value--; } }
void delayus(int value1) { while (value1)