[问答]

在OLED初始化之后(SPI方式)的所有模块都不能成功初始化是怎么回事？

问答对人有帮助，内容完整，我也想知道答案 0 //主函数初始化部分 u1_printf("Usart_Init success rn"); OLED_Init(); //初始化OLED u1_printf("LOED_INIT success rn"); OLED_Clear(0); //清屏（全黑） u1_printf("LOED_Clear success rn"); TEST_Chinese(); //OLED显示中文 u1_printf("LOED_show success rn"); while(DHT11_Init()) //DHT11初始化 { u1_printf("DHT11_INIT error rn"); } u1_printf("DHT11_INIT success rn"); //OLED初始化代码 #include "oled.h" #include "stdlib.h" #include "string.h" #include "delay.h" #include "spi.h" //OLED显存总共分为8页 //每页8行，一行128个像素点 //OLED的显存 //存放格式如下. //[0]0 1 2 3 ... 127 (0~7)行 //[1]0 1 2 3 ... 127 (8~15)行 //[2]0 1 2 3 ... 127 (16~23)行 //[3]0 1 2 3 ... 127 (24~31)行 //[4]0 1 2 3 ... 127 (32~39)行 //[5]0 1 2 3 ... 127 (40~47)行 //[6]0 1 2 3 ... 127 (48~55)行 //[7]0 1 2 3 ... 127 (56~63)行 //数组每个bit存储OLED每个像素点的颜色值(1-亮(白色),0-灭(黑色)) //每个数组元素表示1列8个像素点，一共128列 static unsigned char OLED_buffer[1024] = { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, }; /******************************************************************* * @name :void OLED_WR_Byte(unsigned dat,unsigned cmd) * @function :Write a byte of content to the OLED screen * @parameters :dat:Content to be written cmd:0-write command 1-write data * @retvalue :None ******************************************************************/ void OLED_WR_Byte(unsigned dat,unsigned cmd) { if(cmd) { OLED_DC_Set(); } else { OLED_DC_Clr(); } OLED_CS_Clr(); SPI_WriteByte(SPI2,dat); OLED_CS_Set(); } /***************************************************************** * @name :void OLED_Set_Pos(unsigned char x, unsigned char y) * @function :Set coordinates in the OLED screen * @parameters :x:x coordinates y:y coordinates * @retvalue :None ******************************************************************/ void OLED_Set_Pos(unsigned char x, unsigned char y) { OLED_WR_Byte(YLevel+y/PAGE_SIZE,OLED_CMD); OLED_WR_Byte((((x+2) 0xf0)>>4)\|0x10,OLED_CMD); OLED_WR_Byte(((x+2) 0x0f),OLED_CMD); } /***************************************************************** * @name :void OLED_Display_On(void) * @function :Turn on OLED display * @parameters :None * @retvalue :None ******************************************************************/ void OLED_Display_On(void) { OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令 OLED_WR_Byte(0X14,OLED_CMD); //DCDC ON OLED_WR_Byte(0XAF,OLED_CMD); //DISPLAY ON } /***************************************************************** * @name :void OLED_Display_Off(void) * @function :Turn off OLED display * @parameters :None * @retvalue :None ******************************************************************/ void OLED_Display_Off(void) { OLED_WR_Byte(0X8D,OLED_CMD); //SET DCDC命令 OLED_WR_Byte(0X10,OLED_CMD); //DCDC OFF OLED_WR_Byte(0XAE,OLED_CMD); //DISPLAY OFF } /***************************************************************** * @name :void OLED_Set_Pixel(unsigned char x, unsigned char y,unsigned char color) * @function :set the value of pixel to RAM * @parameters :x:the x coordinates of pixel y:the y coordinates of pixel color:the color value of the point 1-white 0-black * @retvalue :None *******************************************************************/ void OLED_Set_Pixel(unsigned char x, unsigned char y,unsigned char color) { if(color) { OLED_buffer[(y/PAGE_SIZE)WIDTH+x]\|= (1<<(y%PAGE_SIZE)) 0xff; } else { OLED_buffer[(y/PAGE_SIZE)WIDTH+x] = ~((1<<(y%PAGE_SIZE)) 0xff); } } /****************************************************************** * @name :void OLED_Display(void) * @function isplay in OLED screen * @parameters :None * @retvalue :None *******************************************************************/ void OLED_Display(void) { u8 i,n; for(i=0;i<AGE_SIZE;i++) { OLED_WR_Byte (YLevel+i,OLED_CMD); //设置页地址（0~7） OLED_WR_Byte (XLevelL,OLED_CMD); //设置显示位置—列低地址 OLED_WR_Byte (XLevelH,OLED_CMD); //设置显示位置—列高地址 for(n=0;n=100)return 1; else retry=0; while (!DHT11_DQ_IN retry<100)//DHT11拉低后会再次拉高40~80us { retry++; Delay_Us(1); }; if(retry>=100)return 1; return 0; } //从DHT11读取一个位 //返回值：1/0 u8 DHT11_Read_Bit(void) { u8 retry=0; while(DHT11_DQ_IN retry<100)//等待变为低电平 { retry++; Delay_Us(1); } retry=0; while(!DHT11_DQ_IN retry<100)//等待变高电平 { retry++; Delay_Us(1); } Delay_Us(40);//等待40us if(DHT11_DQ_IN)return 1; else return 0; } //从DHT11读取一个字节 //返回值：读到的数据 u8 DHT11_Read_Byte(void) { u8 i,dat; dat=0; for (i=0;i<8;i++) { dat<<=1; dat\|=DHT11_Read_Bit(); } return dat; } //从DHT11读取一次数据 //temp:温度值(范围:0~50°) //humi:湿度值(范围:20%~90%) //返回值：0,正常;1,读取失败 u8 DHT11_Read_Data(u8 temp,u8 humi) { u8 buf[5]; u8 i; DHT11_Rst(); if(DHT11_Check()==0) { for(i=0;i<5;i++)//读取40位数据 { buf[i]=DHT11_Read_Byte(); } if((buf[0]+buf[1]+buf[2]+buf[3])==buf[4]) { humi=buf[0]; *temp=buf[2]; } }else return 1; return 0; } //初始化DHT11的IO口 DQ 同时检测DHT11的存在 //返回1:不存在 //返回0:存在 u8 DHT11_Init(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); //使能PG端口时钟 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; //PG11端口配置 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //推挽输出 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, GPIO_InitStructure); //初始化IO口 GPIO_SetBits(GPIOA,GPIO_Pin_11); //PG11 输出高 DHT11_Rst(); //复位DHT11 return DHT11_Check();//等待DHT11的回应 } 0 本主题由 Harmony技术专家于 2024-3-29 10:42 审核通过
2024-3-28 07:50:53　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × heks 该类别下有 50 个回答。邀请回答 hgimtk 该类别下有 44 个回答。邀请回答新星之火12138 该类别下有 42 个回答。邀请回答 wang21cj 该类别下有 41 个回答。邀请回答 chm5 该类别下有 40 个回答。邀请回答 hjfjsdgfjdsf 该类别下有 37 个回答。邀请回答 fdjslkjd 该类别下有 35 个回答。邀请回答 uvysdfydad 该类别下有 35 个回答。邀请回答 werywer 该类别下有 35 个回答。邀请回答 h1654155957.9520 该类别下有 35 个回答。邀请回答 jenny042 该类别下有 34 个回答。邀请回答 dfzvzs 该类别下有 34 个回答。邀请回答维生素B2 该类别下有 34 个回答。邀请回答凤毛麟角该类别下有 34 个回答。邀请回答 ggfvxv 该类别下有 33 个回答。邀请回答刘洋该类别下有 33 个回答。邀请回答 meihuacg 该类别下有 33 个回答。邀请回答 hfgdzc 该类别下有 33 个回答。邀请回答 lining870815844 该类别下有 32 个回答。邀请回答 h1654155275.6678 该类别下有 32 个回答。邀请回答举报廖阿朋相关推荐 • hc05蓝牙模块初始化不成功 3545 • STM32F446 RTC初始化失败是什么原因？ 480 • Lwip不能初始化成功 2175 • PSC模块初始化有什么规则？ 1350 • 有关SPI重复初始化的问题 1741 • AD9364初始化问题及标准初始化流程？ 4007 • 请问2.4G实验和spi实验为什么要初始化2次spiinit？ 1839 • SFUD库看不到初始化spi1的GPIO的代码是怎么一回事 1707 • SD卡初始化顺序有没有办法固定在文件系统挂载之前？ 2416 • 初始化SDRAM的时候用的是初始化时钟之前的时钟？还是之后的时钟？ 1919 1个回答

答案对人有帮助，有参考价值 0 不知你说的所有模块都不能成功初始化指哪些模块，一般来讲各个模块的初始化是相互独立的，倒是GPIO有可能存在复用的冲突问题，若管脚复用冲突可能会导致功能的异常。建议你重点检查下有无GPIO管脚复用冲突的问题。尽量使用CubeMx进行初始配置，这样很容易发现管脚冲突方面的问题。再就是，你软件上可以先大刀阔斧地先屏蔽可能导致问题的代码，然后逐步增加功能模块，看看哪里会产生问题，这样慢慢定位查找。

2024-3-29 10:21:29 评论举报张倩