用SPI总线通讯
1、模拟spi：
static void LCD_GPIO_Init(void) { nrf_gpio_cfg_output(LCD_CS_PIN); nrf_gpio_pin_set(LCD_CS_PIN);
nrf_gpio_cfg_output(LCD_RESET_PIN); nrf_gpio_cfg_output(LCD_DC_PIN); nrf_gpio_cfg_output(LCD_SCLK_PIN); nrf_gpio_cfg_output(LCD_SDI_PIN);
nrf_gpio_cfg_output(LCD_VCC_PIN); nrf_gpio_pin_clear(LCD_VCC_PIN); }
static void enable_cs_pin(void) { nrf_gpio_pin_clear(LCD_CS_PIN); }
static void disable_cs_pin(void) { nrf_gpio_pin_set(LCD_CS_PIN); }
void lcd_240x240_reset(void) { /* //---------------------Reset sequence----------// LCD_RESET=1; // nrf_delay_ms(1); //Delay 1ms LCD_RESET=0; nrf_delay_ms(10); //Delay 10ms LCD_RESET=1; nrf_delay_ms(120); //Delay 120ms //--------------------------------------------------------------------// */ nrf_gpio_pin_set(LCD_VCC_PIN); nrf_delay_ms(10); nrf_gpio_pin_set(LCD_RESET_PIN); nrf_delay_ms(1); nrf_gpio_pin_clear(LCD_RESET_PIN); nrf_delay_ms(10); nrf_gpio_pin_set(LCD_RESET_PIN); nrf_delay_ms(120);
}
void LCD240x240_WriteCMD( unsigned char data) { /*四线SPI接口屏的操作*/ unsigned char i,MB=0; nrf_gpio_pin_clear(LCD_DC_PIN);/*低，0:代表CMD,芯片规格书规定*/ enable_cs_pin(); //CS low MB=data; for(i=0; i<8; i++) /*模拟SPI协义*/ { //nrf_gpio_pin_set(LCD_SCLK_PIN);//注意芯片规格书时序图，先准备数据，再拉时钟线 if(MB&0x80) nrf_gpio_pin_set(LCD_SDI_PIN); else nrf_gpio_pin_clear(LCD_SDI_PIN); nrf_gpio_pin_set(LCD_SCLK_PIN); nrf_gpio_pin_clear(LCD_SCLK_PIN); MB<<=1; } disable_cs_pin(); //CS high
}
void LCD240x240_WriteDAT(unsigned char data) { /*四线SPI接口屏的操作*/ unsigned char i,MB=0; nrf_gpio_pin_set(LCD_DC_PIN);/*高，1，代表数据，芯片规格书规定*/ enable_cs_pin(); //CS low MB=data; for(i=0; i<8; i++) { //nrf_gpio_pin_set(LCD_SCLK_PIN);//注意芯片规格书时序图，先准备数据，再拉时钟线 if(MB&0x80) nrf_gpio_pin_set(LCD_SDI_PIN); else nrf_gpio_pin_clear(LCD_SDI_PIN); nrf_gpio_pin_set(LCD_SCLK_PIN); nrf_gpio_pin_clear(LCD_SCLK_PIN); MB<<=1; } disable_cs_pin(); //CS high }
void lcd_240x240_init_test(void) { LCD_GPIO_Init();
lcd_240x240_reset();
LCD240x240_WriteCMD(0x11); //退出睡眠 nrf_delay_ms(120); LCD240x240_WriteCMD(0x36); // Memory Data Access Control LCD240x240_WriteDAT(0x00); LCD240x240_WriteCMD(0x3A); // Interface Pixel Format LCD240x240_WriteDAT(0x55); LCD240x240_WriteCMD(0xB2); //Porch Setting LCD240x240_WriteDAT(0x0C); LCD240x240_WriteDAT(0x0C); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x33); LCD240x240_WriteDAT(0x33);
// LCD240x240_WriteCMD(0x13);//Normal Display Mode On LCD240x240_WriteCMD(0xB7); // Gate Control LCD240x240_WriteDAT(0x75); LCD240x240_WriteCMD(0xC2); //VDV and VRH Command Enable LCD240x240_WriteDAT(0x01); LCD240x240_WriteCMD(0xC3); //VRH Set LCD240x240_WriteDAT(0x19); LCD240x240_WriteCMD(0xC4);//VDV Set LCD240x240_WriteDAT(0x20);
LCD240x240_WriteCMD(0xC6); //Frame Rate Control in Normal Mode LCD240x240_WriteDAT(0x0F); LCD240x240_WriteCMD(0xD0); // Power Control 1 LCD240x240_WriteDAT(0xA4); LCD240x240_WriteDAT(0xA1); LCD240x240_WriteCMD(0xD6); // LCD240x240_WriteDAT(0xA1); LCD240x240_WriteCMD(0x21); //Display Inversion On LCD240x240_WriteCMD(0xBB); // VCOM Setting LCD240x240_WriteDAT(0x3B); LCD240x240_WriteCMD(0xE0); //Positive Voltage Gamma Control LCD240x240_WriteDAT(0xF0); LCD240x240_WriteDAT(0x0B); LCD240x240_WriteDAT(0x11); LCD240x240_WriteDAT(0x0E); LCD240x240_WriteDAT(0x0D); LCD240x240_WriteDAT(0x19); LCD240x240_WriteDAT(0x36); LCD240x240_WriteDAT(0x33); LCD240x240_WriteDAT(0x4B); LCD240x240_WriteDAT(0x07); LCD240x240_WriteDAT(0x14); LCD240x240_WriteDAT(0x14); LCD240x240_WriteDAT(0x2C); LCD240x240_WriteDAT(0x2E); LCD240x240_WriteCMD(0xE1);//Negative Voltage Gamma Control LCD240x240_WriteDAT(0xF0); LCD240x240_WriteDAT(0x0D); LCD240x240_WriteDAT(0x12); LCD240x240_WriteDAT(0x0B); LCD240x240_WriteDAT(0x09); LCD240x240_WriteDAT(0x03); LCD240x240_WriteDAT(0x32); LCD240x240_WriteDAT(0x44); LCD240x240_WriteDAT(0x48); LCD240x240_WriteDAT(0x39); LCD240x240_WriteDAT(0x16); LCD240x240_WriteDAT(0x16); LCD240x240_WriteDAT(0x2D); LCD240x240_WriteDAT(0x30); LCD240x240_WriteCMD(0x2A); // Column Address Set LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0xEF); LCD240x240_WriteCMD(0x2B);// Row Address Set LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0xEF); LCD240x240_WriteCMD(0x2C); // Memory Write
LCD240x240_WriteCMD(0x29); //Display On nrf_delay_ms(120);
#ifdef LCD_240X240
osThreadDef(sys1000MsTask, Sys1000MsTask, osPriorityLow, 0, 64); sys1000MsTaskHandle= osThreadCreate(osThread(sys1000MsTask), NULL); if( !sys1000MsTaskHandle ) { error_handler(1, _Err_Create_Task_Bad); } #endif // LCD240x240_clear(0xF800); // LCD240x240_clear(0x07E0); // LCD240x240_clear(0x001F);
// LCD240x240_display_line(100,140,0,100,300); // LCD240x240_display_line(150,180,0,240,500); // LCD240x240_display_line(0,240,100,120,500); //test_display(0x00ee); }
/* void Sys1000MsTask(void const * argument) { while(1) { LCD240x240_clear(0xF800);//R //osDelay(500); LCD240x240_clear(0x07E0);//G // osDelay(500); LCD240x240_clear(0x001F);//B // osDelay(500); } } */ void test_display(uint16_t color) { //LCD240x240_WriteCMD(0x2C); // Memory Write
uint8_t colunm; uint8_t row;
LCD240x240_clear(0x0004); LCD240x240_WriteCMD(0x2A); // Column Address Set 列 LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x66); LCD240x240_WriteCMD(0x2B);// Row Address Set 行 LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x00); LCD240x240_WriteDAT(0x66);
LCD240x240_WriteCMD(0x2C); // Memory Write //LCD240x240_WriteCMD(0x29); //Display On //nrf_delay_ms(120); for(row=0; row<101; row++) { for(colunm=0; colunm<101; colunm++) { LCD240x240_WriteDAT(color>>8); LCD240x240_WriteDAT(color); } } }
void Panel_SleepIn_Mode(void) { LCD240x240_WriteCMD(0x28); nrf_delay_ms(120); LCD240x240_WriteDAT(0x10); nrf_delay_ms(120); } void Panel_SleepOut_Mode(void) { LCD240x240_WriteCMD(0x11); nrf_delay_ms(120); LCD240x240_WriteDAT(0x29); nrf_delay_ms(120); }
void LCD240x240_clear(uint16_t clear_color) { uint8_t i,j,k; uint16_t MB = 0; LCD240x240_setxy( 0, 239, 0, 239);
// nrf_gpio_pin_set(LCD_DC_PIN);/*高，1，代表数据，芯片规格书规定*/ // enable_cs_pin(); //CS low for(i=0; i<LCD_HEIGHT; i++) { for(j=0; j<LCD_WIDTH; j++) { LCD240x240_WriteDAT(clear_color>>8); LCD240x240_WriteDAT(clear_color); // for(k=0; k<16; k++) // { // //nrf_gpio_pin_set(LCD_SCLK_PIN); // if(MB&0x8000) // nrf_gpio_pin_set(LCD_SDI_PIN); // else // nrf_gpio_pin_clear(LCD_SDI_PIN); // nrf_gpio_pin_set(LCD_SCLK_PIN); // nrf_gpio_pin_clear(LCD_SCLK_PIN); // MB<<=1; // } } } // disable_cs_pin(); //CS high }
void LCD240x240_setxy(uint8_t Xstart, uint8_t Xend, uint8_t Ystart, uint8_t Yend) { LCD240x240_WriteCMD(0x2A); // Column Address Set LCD240x240_WriteDAT(Xstart>>8); LCD240x240_WriteDAT(Xstart); LCD240x240_WriteDAT(Xend>>8); LCD240x240_WriteDAT(Xend); LCD240x240_WriteCMD(0x2B);// Row Address Set LCD240x240_WriteDAT(Ystart>>8); LCD240x240_WriteDAT(Ystart); LCD240x240_WriteDAT(Yend>>8); LCD240x240_WriteDAT(Yend);
LCD240x240_WriteCMD(0x2C); // Memory Write }
void LCD240x240_display_line(uint8_t Xstart, uint8_t Xend, uint8_t Ystart, uint8_t Yend, uint16_t color) { uint8_t line_clumn;//列 uint8_t line_row;//行 if(Xstart > LCD_WIDTH|| Xend > LCD_WIDTH || Ystart > LCD_HEIGHT || Yend > LCD_HEIGHT|| Xstart > Xend || Ystart > Yend) { return; }
LCD240x240_setxy(Xstart, Xend, Ystart, Yend);
for(line_clumn=0; line_clumn<(Xend - Xstart + 1); line_clumn++) { for(line_row=0; line_row<(Yend - Ystart + 1); line_row++) { LCD240x240_WriteDAT(color>>8); LCD240x240_WriteDAT(color); } } }
2、硬件spi
void lcd240x240_set_addr_window(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1) { uint8_t column_temp; uint8_t row_temp; ASSERT(x0 <= x1); ASSERT(y0 <= y1); lcd240x240_write_command_m(0x2A); //column x lcd240x240_write_data_m((x0*2)>>8); lcd240x240_write_data_m(x0*2);//x0*2 lcd240x240_write_data_m((x1*2+1)>>8); lcd240x240_write_data_m((x1*2+1));//x1*2+1
lcd240x240_write_command_m(0x2B);//row y #ifdef LCD_ROTATE_180 lcd240x240_write_data_m((y0*16+80)>>8); lcd240x240_write_data_m(y0*16+80);//y0*16+80 lcd240x240_write_data_m(((y1+1)*16-1+80)>>8); lcd240x240_write_data_m((y1+1)*16-1+80);//(y1+1)*16-1+80 #else lcd240x240_write_data_m((y0*16)>>8); lcd240x240_write_data_m(y0*16);//y0*16 lcd240x240_write_data_m(((y1+1)*16-1)>>8); lcd240x240_write_data_m((y1+1)*16-1);//(y1+1)*16-1 #endif lcd240x240_write_command_m(0x2C);
}
void LCD_spi240x240_setxy(void) { lcd240x240_write_command_m(0x2A); //Column Address Set lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x00); //0 lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0xEF); //239
lcd240x240_write_command_m(0x2B); //Row Address Set #ifdef LCD_ROTATE_180 lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x50); //0x00 lcd240x240_write_data_m(0x01); //0x00 lcd240x240_write_data_m(0x3F); //0xEF #else lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x00); //0x00 lcd240x240_write_data_m(0x00); //0x00 lcd240x240_write_data_m(0xEF); //0xEF
#endif
lcd240x240_write_command_m(0x2C); }
void lcd240x240_hw_spi_pixel_draw(uint16_t x, uint16_t y, uint32_t color) { lcd240x240_set_addr_window(x, y, x, y); //LCD_spi240x240_setxy();
//color = RGB2BGR(color); const uint8_t data[2] = {color >> 8, color};
nrf_gpio_pin_set(LCD_DC_PIN);
lcd240x240_spim_write(data, sizeof(data));
nrf_gpio_pin_clear(LCD_DC_PIN); }
void lcd240x240_hw_spi_color_draw(uint16_t color) { const uint16_t data[4] = {color,color,color,color}; nrf_gpio_pin_set(LCD_DC_PIN);
lcd240x240_spim_write(data, sizeof(data)); nrf_gpio_pin_clear(LCD_DC_PIN); }
void commands_control_init(void) { lcd240x240_write_command_m(0x11); //退出睡眠 nrf_delay_ms(120);
lcd240x240_write_command_m(0x36); // Memory Data Access Control #ifdef LCD_ROTATE_180 lcd240x240_write_data_m(0xC0); #else lcd240x240_write_data_m(0x00); #endif nrf_delay_ms(1);
lcd240x240_write_command_m(0x3A); // Interface Pixel Format lcd240x240_write_data_m(0x55);
lcd240x240_write_command_m(0xB2); //Porch Setting lcd240x240_write_data_m(0x0C); //5 lcd240x240_write_data_m(0x0C); lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x33); lcd240x240_write_data_m(0x33);
// lcd240x240_write_command_m(0x13);//Normal Display Mode On lcd240x240_write_command_m(0xB7); // Gate Control lcd240x240_write_data_m(0x75);
lcd240x240_write_command_m(0xC2); //VDV and VRH Command Enable lcd240x240_write_data_m(0x01);
lcd240x240_write_command_m(0xC3); //VRH Set lcd240x240_write_data_m(0x19); lcd240x240_write_command_m(0xC4);//VDV Set lcd240x240_write_data_m(0x20);
lcd240x240_write_command_m(0xC6); //Frame Rate Control in Normal Mode lcd240x240_write_data_m(0x0F); lcd240x240_write_command_m(0xD0); // Power Control 1 lcd240x240_write_data_m(0xA4); lcd240x240_write_data_m(0xA1); lcd240x240_write_command_m(0xD6); // lcd240x240_write_data_m(0xA1); lcd240x240_write_command_m(0x21); //Display Inversion On lcd240x240_write_command_m(0x21); //Idle Mode On
lcd240x240_write_command_m(0xBB); // VCOM Setting lcd240x240_write_data_m(0x3B); lcd240x240_write_command_m(0xE0); //Positive Voltage Gamma Control lcd240x240_write_data_m(0xF0); lcd240x240_write_data_m(0x0B); lcd240x240_write_data_m(0x11); lcd240x240_write_data_m(0x0E); lcd240x240_write_data_m(0x0D); lcd240x240_write_data_m(0x19); lcd240x240_write_data_m(0x36); lcd240x240_write_data_m(0x33); lcd240x240_write_data_m(0x4B); lcd240x240_write_data_m(0x07); lcd240x240_write_data_m(0x14); lcd240x240_write_data_m(0x14); lcd240x240_write_data_m(0x2C); lcd240x240_write_data_m(0x2E); lcd240x240_write_command_m(0xE1);//Negative Voltage Gamma Control lcd240x240_write_data_m(0xF0); lcd240x240_write_data_m(0x0D); lcd240x240_write_data_m(0x12); lcd240x240_write_data_m(0x0B); lcd240x240_write_data_m(0x09); lcd240x240_write_data_m(0x03); lcd240x240_write_data_m(0x32); lcd240x240_write_data_m(0x44); lcd240x240_write_data_m(0x48); lcd240x240_write_data_m(0x39); lcd240x240_write_data_m(0x16); lcd240x240_write_data_m(0x16); lcd240x240_write_data_m(0x2D); lcd240x240_write_data_m(0x30);
lcd240x240_write_command_m(0x2A); // Column Address Set lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0xEF); lcd240x240_write_command_m(0x2B);// Row Address Set #ifdef LCD_ROTATE_180 lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x50); //0x00 lcd240x240_write_data_m(0x01); //0x00 lcd240x240_write_data_m(0x3F); //0xEF #else lcd240x240_write_data_m(0x00); lcd240x240_write_data_m(0x00); //0x00 lcd240x240_write_data_m(0x00); //0x00 lcd240x240_write_data_m(0xEF); //0xEF
#endif lcd240x240_write_command_m(0x2C); // Memory Write
lcd240x240_write_command_m(0x29); //Display On nrf_delay_ms(120); }
void spim_hardware_init(void) {
driver_spim_config.sck_pin = LCD_SCLK_PIN; driver_spim_config.mosi_pin = LCD_SDI_PIN; driver_spim_config.miso_pin = 0xFF; driver_spim_config.ss_pin = LCD_CS_PIN;
driver_spim_config.ss_active_high = false; driver_spim_config.irq_priority = NRFX_SPIM_DEFAULT_CONFIG_IRQ_PRIORITY; driver_spim_config.orc = 0xFF;
driver_spim_config.frequency = SPIM_FREQUENCY_FREQUENCY_M8; driver_spim_config.bit_order = NRF_SPIM_BIT_ORDER_MSB_FIRST; driver_spim_config.mode = NRF_SPIM_MODE_0;
#ifndef SPIM2 driver_spim_config.use_hw_ss = true; driver_spim_config.ss_duration = 0x00; driver_spim_config.rx_delay = 0x00; driver_spim_config.dcx_pin = 0xFF; #endif APP_ERROR_CHECK(nrfx_spim_init(&driver_spim, &driver_spim_config, spi_event_handler_m, NULL)); }
static void lcd240x240_gpio_init(void) { nrf_gpio_cfg_output(LCD_VCC_PIN); nrf_gpio_pin_clear(LCD_VCC_PIN); nrf_gpio_cfg_output(LCD_DC_PIN); nrf_gpio_cfg_output(LCD_RESET_PIN); }
void lcd240x240_reset(void) { nrf_gpio_pin_set(LCD_VCC_PIN); nrf_delay_ms(10); nrf_gpio_pin_set(LCD_RESET_PIN); nrf_delay_ms(1); nrf_gpio_pin_clear(LCD_RESET_PIN); nrf_delay_ms(10); nrf_gpio_pin_set(LCD_RESET_PIN); nrf_delay_ms(120); }
void lcd_240x240_init(void) { ret_code_t err_code; // spi_xfer_done = false; spi_xfer_donem = false;
lcd240x240_gpio_init(); lcd240x240_reset(); spim_hardware_init(); commands_control_init(); // lcd240x240_hw_spi_clear(0); LCD_buffer_init();
nrf_gpio_pin_clear(LCD_VCC_PIN);
lcd240x240_write_command_m(0x28);//add by linch display off lcd240x240_write_command_m(0x10); nrf_delay_ms(200);
return err_code; }
void lcd240x240_hw_spi_clear(uint16_t clear_color) { uint8_t i,j; uint16_t MB; //clear_color = RGB2BGR(clear_color); uint16_t data[1]; //memset(data,0,sizeof(data)); // for(MB=0; MB<4; MB++) { data[0] = clear_color; } //memcpy(data,clear_color,sizeof(data));
LCD_spi240x240_setxy();
nrf_gpio_pin_set(LCD_DC_PIN); for(i=0; i<240; i++)//LCD_HEIGHT { for(j=0; j<240; j++)//LCD_WIDTH { lcd240x240_spim_write(data, sizeof(data)); } } nrf_gpio_pin_clear(LCD_DC_PIN); } 总结：当时屏幕进入休眠后，功耗比原来多5mA，拆掉屏幕就少了5mA。原因：控制背光灯MOS管漏电。
