[问答]

使用RT-Thread studio开启SPI框架驱动OLED失败是哪个步骤做错了吗

问答对人有帮助，内容完整，我也想知道答案 0 想学习使用SPI框架驱动OLED，就准备把中景园的程序移植到RTT上，参考了网上的步骤，在settings里开启spi，在board.c里复制HAL_SPI_MspInit，在board.h和stm32xxxx_hal_config.h里开启了spi，然后代码如下： /* Copyright (c) 2006-2021, RT-Thread Development Team SPDX-License-Identifier: Apache-2.0 Change Logs: Date Author Notes 2021-09-07 Administrator the first version / #include "OLED.h" #define SPI_BUS_NAME "spi1" #define SPI_SSD1306_DEVICE_NAME "spi10" #define RES_PIN 11 #define DC_PIN 12 #define CS_PIN 15 uint8_t OLED_GRAM[128][8]; static struct rt_spi_device spi_dev_ssd1306; /* SPI设备ssd1306对象 / int oled_spi_device_init(void) { __HAL_RCC_GPIOA_CLK_ENABLE(); //设备挂载到SPI总线，抽象为 spi10 设备，同时使用时还需进行 rt_spi_configure rt_hw_spi_device_attach("spi1", "spi10", GPIOA, GPIO_PIN_15); return RT_EOK; } INIT_DEVICE_EXPORT(oled_spi_device_init);//自动初始化 int my_oled_init(void) { rt_pin_mode(RES_PIN, PIN_MODE_OUTPUT ); rt_pin_mode(DC_PIN, PIN_MODE_OUTPUT ); rt_pin_mode(CS_PIN, PIN_MODE_OUTPUT ); spi_dev_ssd1306 = (struct rt_spi_device )rt_device_find("spi10"); if (!spi_dev_ssd1306) { rt_kprintf("spi sample run failed! can't find %s device!\n", "spi10"); } else { // owner必须配置,因为默认为空,为空时无法进行初始化操作 spi_dev_ssd1306->bus->owner = spi_dev_ssd1306; // 必须!!! // 配置spi struct rt_spi_configuration cfg; cfg.data_width = 8; cfg.mode = RT_SPI_MASTER \| RT_SPI_MODE_3 \| RT_SPI_MSB; // 主机,模式0,高位在前 cfg.max_hz = 20 * 1000 * 1000; // SPI 接口时钟频率 rt_spi_configure(spi_dev_ssd1306, &cfg); // 此时才进行MspInit相关的时钟及IO口初始化 } OLED_Init(); return RT_EOK; } //OLED写一个字节 void OLED_WR_Byte(uint8_t dat, uint8_t cmd) { if(cmd) { OLED_DC_Set(); }else{ OLED_DC_Clr(); } rt_spi_send(spi_dev_ssd1306, &dat, 1); OLED_DC_Set(); } //开启OLED显示 void OLED_DisPlay_On(void) { OLED_WR_Byte(0x8D,OLED_CMD);//电荷泵使能 OLED_WR_Byte(0x14,OLED_CMD);//开启电荷泵 OLED_WR_Byte(0xAF,OLED_CMD);//点亮屏幕 } //关闭OLED显示 void OLED_DisPlay_Off(void) { OLED_WR_Byte(0x8D,OLED_CMD);//电荷泵使能 OLED_WR_Byte(0x10,OLED_CMD);//关闭电荷泵 OLED_WR_Byte(0xAF,OLED_CMD);//关闭屏幕 } //更新显存到OLED void OLED_Refresh(void) { uint8_t i,n; for(i=0;i<8;i++) { OLED_WR_Byte(0xb0+i,OLED_CMD); //设置行起始地址 OLED_WR_Byte(0x00,OLED_CMD); //设置低列起始地址 OLED_WR_Byte(0x10,OLED_CMD); //设置高列起始地址 for(n=0;n<128;n++) OLED_WR_Byte(OLED_GRAM[n][i],OLED_DATA); } } //清屏函数 void OLED_Clear(void) { uint8_t i,n; for(i=0;i<8;i++) { for(n=0;n<128;n++) { OLED_GRAM[n][i]=0;//清除所有数据 } } OLED_Refresh();//更新显示 } //画点 //x:0~127 //y:0~63 void OLED_DrawPoint(uint8_t x,uint8_t y) { uint8_t i,m,n; i=y/8; m=y%8; n=1<<m; OLED_GRAM[x][i]\|=n; } //清除一个点 //x:0~127 //y:0~63 void OLED_ClearPoint(uint8_t x,uint8_t y) { uint8_t i,m,n; i=y/8; m=y%8; n=1<<m; OLED_GRAM[x][i]=~OLED_GRAM[x][i]; OLED_GRAM[x][i]\|=n; OLED_GRAM[x][i]=~OLED_GRAM[x][i]; } void OLED_DrawCircle(uint8_t x,uint8_t y,uint8_t r) { int a, b,num; a = 0; b = r; while(2 * b * b >= r * r) { OLED_DrawPoint(x + a, y - b); OLED_DrawPoint(x - a, y - b); OLED_DrawPoint(x - a, y + b); OLED_DrawPoint(x + a, y + b); OLED_DrawPoint(x + b, y + a); OLED_DrawPoint(x + b, y - a); OLED_DrawPoint(x - b, y - a); OLED_DrawPoint(x - b, y + a); a++; num = (a * a + b * b) - r*r;//计算画的点离圆心的距离 if(num > 0) { b--; a--; } } } //OLED的初始化 void OLED_Init(void) { OLED_RES_Clr(); rt_thread_delay(200); OLED_RES_Set(); OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel OLED_WR_Byte(0x00,OLED_CMD);//---set low column address OLED_WR_Byte(0x10,OLED_CMD);//---set high column address OLED_WR_Byte(0x40,OLED_CMD);//--set start line address Set Mapping RAM Display Start Line (0x00~0x3F) OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register OLED_WR_Byte(0xCF,OLED_CMD);// Set SEG Output Current Brightness OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping 0xa0左右反置 0xa1正常 OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction 0xc0上下反置 0xc8正常 OLED_WR_Byte(0xA6,OLED_CMD);//--set normal display OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64) OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset Shift Mapping RAM Counter (0x00~0x3F) OLED_WR_Byte(0x00,OLED_CMD);//-not offset OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration OLED_WR_Byte(0x12,OLED_CMD); OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh OLED_WR_Byte(0x40,OLED_CMD);//Set VCOM Deselect Level OLED_WR_Byte(0x20,OLED_CMD);//-Set Page Addressing Mode (0x00/0x01/0x02) OLED_WR_Byte(0x02,OLED_CMD);// OLED_WR_Byte(0x8D,OLED_CMD);//--set Charge Pump enable/disable OLED_WR_Byte(0x14,OLED_CMD);//--set(0x10) disable OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5) OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7) OLED_WR_Byte(0xAF,OLED_CMD); OLED_Clear(); OLED_DrawCircle(50, 50, 20); OLED_Refresh(); } 在OLED_Init最后想画个点测试是否成功，但是屏幕没有点亮，msh里输入list_device可以看见spi1和spi10是正常开启的，请问是哪个步骤做错了吗 0
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答案对人有帮助，有参考价值 0 拿着个试试 /* * Copyright (c) 2014-2019, Winning_technology * * SPDX-License-Identifier: None * * Change Logs: * Date Author Notes * 2019-07-19 Jiao newly-built / / * 程序清单：OLED屏幕底层驱动 / #include #include "oled_drv.h" #include "stdlib.h" #include #include #include "drv_spi.h" #define OLED_DC_PIN 4 / 数据控制脚 / #define Max_Column 128 #define Max_Row 64 #define X_WIDTH 128 #define Y_WIDTH 64 //OLED控制用函数 struct rt_spi_device spi_device = RT_NULL; rt_uint8_t video_mem[8][128]; //显存，1K RAM空间 //屏幕命令 static void OLED_CMD(unsigned dat) { struct rt_spi_message spi_msg; rt_pin_write(OLED_DC_PIN,PIN_LOW); rt_memset(&spi_msg, 0x00, sizeof(spi_msg)); spi_msg.send_buf = &dat; spi_msg.length = 1; rt_spi_transfer_message(spi_device, &spi_msg); rt_pin_write(OLED_DC_PIN,PIN_LOW); } //开启OLED显示 void OLED_Display_On(void) { OLED_CMD(0X8D); //SET DCDC命令 OLED_CMD(0X14); //DCDC ON OLED_CMD(0XAF); //DISPLAY ON } //关闭OLED显示 void OLED_Display_Off(void) { OLED_CMD(0X8D); //SET DCDC命令 OLED_CMD(0X10); //DCDC OFF OLED_CMD(0XAE); //DISPLAY OFF } //刷屏，不刷不显示 void OLED_refresh(void) { struct rt_spi_message spi_msg; rt_uint8_t i; rt_memset(&spi_msg, 0x00, sizeof(spi_msg)); for(i=0;i<8;i++) { OLED_CMD(0xB0+i); OLED_CMD(0x02); OLED_CMD(0x10); rt_pin_write(OLED_DC_PIN,PIN_HIGH); spi_msg.send_buf = video_mem[i]; spi_msg.length = 128; rt_spi_transfer_message(spi_device, &spi_msg); rt_pin_write(OLED_DC_PIN,PIN_LOW); } } //清屏函数,清完屏,整个屏幕是黑色的!和没点亮一样!!! void OLED_Clear(void) { rt_uint8_t i,n; for(i=0;i<8;i++)for(n=0;n<128;n++)video_mem[i][n]=0X00; // OLED_refresh();//更新显示 } //画点 //x:0~127 //y:0~63 //t:1 填充 0,清空 void OLED_DrawPoint(rt_uint8_t x,rt_uint8_t y,rt_uint8_t t) { rt_uint8_t pos,bx,temp=0; if(x>127\|\|y>63)return;//超出范围了. pos=7-(y>>3); bx=y%8; temp=1<<(7-bx); if(t)video_mem[pos][x]\|=temp; else video_mem[pos][x]&=~temp; } //x1,y1,x2,y2 填充区域的对角坐标 //确保x1<=x2;y1<=y2 0<=x1<=127 0<=y1<=63 //dot:0,清空;1,填充 void OLED_Fill(rt_uint8_t x1,rt_uint8_t y1,rt_uint8_t x2,rt_uint8_t y2,rt_uint8_t dot) { rt_uint8_t x,y; for(x=x1;x<=x2;x++) { for(y=y1;y<=y2;y++)OLED_DrawPoint(x,y,dot); } OLED_refresh();//更新显示 } /OLED spi驱动初始化/ rt_err_t oled_drv_init(void) { char spi_dev_name="spi10"; / 输入模式 / rt_pin_mode(OLED_DC_PIN, PIN_MODE_OUTPUT); //OLED_DC rt_pin_write(OLED_DC_PIN,PIN_LOW); rt_hw_spi_device_attach("spi1",spi_dev_name,GPIOA,GPIO_PIN_12); if (spi_device != RT_NULL) { return 0; } spi_device = (struct rt_spi_device ) rt_device_find(spi_dev_name); if (spi_device == RT_NULL) { rt_kprintf("SPI device %s not found!", spi_dev_name); return -RT_ENOSYS; } /* check SPI device type / RT_ASSERT(spi_device->parent.type == RT_Device_Class_SPIDevice); / configure SPI device/ { struct rt_spi_configuration cfg; cfg.data_width = 8; cfg.mode = RT_SPI_MASTER \| RT_SPI_MODE_0 \| RT_SPI_MSB; / SPI Compatible Modes 0 / cfg.max_hz = 8 1000 * 1000; /* SPI Interface with Clock Speeds Up to 8 MHz / rt_spi_configure(spi_device, &cfg); } if (rt_device_open((rt_device_t) spi_device, RT_DEVICE_OFLAG_WRONLY) != RT_EOK) { rt_kprintf("open SPI device %s error.", spi_dev_name); return -RT_ERROR; } return RT_EOK; } //显示初始化 void Display_Init(void) { oled_drv_init(); rt_thread_mdelay(300); OLED_CMD(0xAE); //关闭显示 OLED_CMD(0xD5); //设置时钟分频因子,震荡频率 OLED_CMD(80); //[3:0],分频因子;[7:4],震荡频率 OLED_CMD(0xA8); //设置驱动路数 OLED_CMD(0X3F); //默认0X3F(1/64) OLED_CMD(0xD3); //设置显示偏移 OLED_CMD(0X00); //默认为0 OLED_CMD(0x40); //设置显示开始行 [5:0],行数. OLED_CMD(0x8D); //电荷泵设置 OLED_CMD(0x14); //bit2，开启/关闭 OLED_CMD(0x20); //设置内存地址模式 OLED_CMD(0x02); //[1:0],00，列地址模式;01，行地址模式;10,页地址模式;默认10; OLED_CMD(0xA1); //段重定义设置,bit0:0,0->0;1,0->127; OLED_CMD(0xC0); //设置COM扫描方向;bit3:0,普通模式;1,重定义模式 COM[N-1]->COM0;N:驱动路数 OLED_CMD(0xDA); //设置COM硬件引脚配置 OLED_CMD(0x12); //[5:4]配置 OLED_CMD(0x81); //对比度设置 OLED_CMD(0xEF); //1~255;默认0X7F (亮度设置,越大越亮) OLED_CMD(0xD9); //设置预充电周期 OLED_CMD(0xf1); //[3:0],PHASE 1;[7:4],PHASE 2; OLED_CMD(0xDB); //设置VCOMH 电压倍率 OLED_CMD(0x30); //[6:4] 000,0.65vcc;001,0.77vcc;011,0.83vcc; OLED_CMD(0xA4); //全局显示开启;bit0:1,开启;0,关闭;(白屏/黑屏) OLED_CMD(0xA6); //设置显示方式;bit0:1,反相显示;0,正常显示 OLED_CMD(0xAF); //开启显示 OLED_Clear(); OLED_refresh(); // rt_thread_mdelay(2000); }

2022-11-10 10:34:58 评论举报张健