STM32G030F6P6基于模拟IIC驱动1.54寸OLED屏幕
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1 注意事项

2 如何利用STM32G030F6P6驱动OLED显示屏

    2.1*基本配置*

    2.2 *1.54寸OLED端口含义*

    2.3 *1.54寸OLED液晶屏引脚与STM32G030F6P6引脚的硬件连接*

    2.4 *1.54寸OLED液晶屏驱动程序*

3 测试

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• 注意事项
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      本文使用的自制电路板芯片是“STM32G030F6P6”以及ST-LINK v2下载工具，采用内部高速晶振。不同的SMT32芯片，基本配置都是一样，只需要做稍微的更改即可，后面会提到需要更改哪些地方。

    该程序使用模拟IIC，不是硬件IIC，只需将SCL，SDA对应的STM32G030F6P6引脚设为推挽输出即可，另外注意移植代码时需要修改为对应引脚。

      该程序在CubeMX下完成，该程序基于中景园STM32标准库函数示例程序修改的。标准库函数例程和本案例完整代码工程获取方式为公众号回复IIC驱动获取下载地址。

2 如何利用STM32驱动OLED液晶屏

2.1基本配置

     首先利用CubeMX工具进行基本配置，配置内容主要包括设置PB6、PB7为输出模式；设置PB14和PB13为SWCLK调试接口；设置PA12下拉输输出模式和PA11为上拉输入模式。时钟采用芯片内部高速时钟，部分配置如下图所示。

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2.2 1.54OLED端口含义

IIC接口的OLED引脚有四脚，如图所示分别为

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2.3 1.54OLED液晶屏引脚与STM32引脚的硬件连接

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       这里OLED的SCL接STM32的PB7,SDA接单片机的PB9,如果采用模拟IIC，这两个引脚是可以随意改动，只需要在CubeMX上事先配置好对应引脚为OutPut模式。这里接PB9和PB7，因为这两个引脚可以作为硬件IIC使用。

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2.4  1.54寸OLED液晶屏驱动程序

     首先修改oled.c文件，删除#include "delay.h"，将u8全部替换为uint8_t；将u16全部替换为uint16_t；修改OLED的初始化函数，删除如下代码，因为初始化已经在主函数通过MX_GPIO_Init()实现。将delay_ms(200)用HAL_Delay(200)替换。

           

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1. <div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//修改之后的OLED的初始化代码</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_Init(void)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">{</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_RES_Clr();</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        //delay_ms(200);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        HAL_Delay(200);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_RES_Set();</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xAE,OLED_CMD);//--turn off oled panel</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xFD,OLED_CMD);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x12,OLED_CMD);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xA0,OLED_CMD);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xA8,OLED_CMD);//--set multiplex ratio(1 to 64)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x3f,OLED_CMD);//--1/64 duty</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xD3,OLED_CMD);//-set display offset        Shift Mapping RAM Counter (0x00~0x3F)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x00,OLED_CMD);//-not offset</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x40,OLED_CMD);//--set start line address  Set Mapping RAM Display Start Line (0x00~0x3F)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xA1,OLED_CMD);//--Set SEG/Column Mapping     0xa0左右反置 0xa1正常</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xC8,OLED_CMD);//Set COM/Row Scan Direction   0xc0上下反置 0xc8正常</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xDA,OLED_CMD);//--set com pins hardware configuration</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x12,OLED_CMD);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x81,OLED_CMD);//--set contrast control register</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xBF,OLED_CMD);// Set SEG Output Current Brightness</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x25,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xDB,OLED_CMD);//--set vcomh</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x34,OLED_CMD);//Set VCOM Deselect Level</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xA4,OLED_CMD);// Disable Entire Display On (0xa4/0xa5)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xA6,OLED_CMD);// Disable Inverse Display On (0xa6/a7)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_Clear();</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xAF,OLED_CMD);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">}</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">pping RAM Counter (0x00~0x3F)
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2. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x00,OLED_CMD);//-not offset</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xd5,OLED_CMD);//--set display clock divide ratio/oscillator frequency</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0x80,OLED_CMD);//--set divide ratio, Set Clock as 100 Frames/Sec</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xD9,OLED_CMD);//--set pre-charge period</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">        OLED_WR_Byte(0xF1,OLED_CMD);//Set Pre-Charge as 15 Clocks & Discharge as 1 Clock</font></font></font></div>

复制代码

      接下来修改oled.h文件，这里主要是将对连接OLED的SCK和SDA的两个标准库读写操作用HAL库操作。

1. <div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#ifndef __OLED_H</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define __OLED_H </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
   
2. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//#include "stm32f0xx.h"</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">/******1.改为hal库头文件*****/</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#include "stm32g0xx_hal.h"</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//-----------------测试LED端口定义---------------- </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//#define LED_ON        GPIO_ResetBits(GPIOA,GPIO_Pin_15)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//#define LED_OFF       GPIO_SetBits(GPIOA,GPIO_Pin_15)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
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3. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//-----------------OLED端口定义---------------- </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">/******2.改为hal对GPIO操作*****/</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//SCL----->PB7</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">//SDA----->PB9</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_SCL_Clr() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_RESET)//SCL</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_SCL_Set() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_SET)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
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4. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
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5. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
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6. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_SDA_Clr() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_9, GPIO_PIN_RESET)//DIN</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_SDA_Set() HAL_GPIO_WritePin(GPIOB, GPIO_PIN_9, GPIO_PIN_SET)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
   
7. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_RES_Clr() HAL_GPIO_WritePin(GPIOA, GPIO_PIN_2, GPIO_PIN_RESET)//RES</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_RES_Set() HAL_GPIO_WritePin(GPIOA, GPIO_PIN_2, GPIO_PIN_SET)</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
   
8. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
   
9. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_CMD  0        //写命令</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define OLED_DATA 1        //写数据</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
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10. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define uint8_t unsigned char </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define u16 unsigned int</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#define u32 unsigned long</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
    
11. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ClearPoint(uint8_t x,uint8_t y);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ColorTurn(uint8_t i);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_DisplayTurn(uint8_t i);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void I2C_Start(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void I2C_Stop(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void I2C_WaitAck(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void Send_Byte(uint8_t dat);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_WR_Byte(uint8_t dat,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_DisPlay_On(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_DisPlay_Off(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_Refresh(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_Clear(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_DrawPoint(uint8_t x,uint8_t y,uint8_t t);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_DrawLine(uint8_t x1,uint8_t y1,uint8_t x2,uint8_t y2,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_DrawCircle(uint8_t x,uint8_t y,uint8_t r);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ShowChar(uint8_t x,uint8_t y,uint8_t chr,uint8_t size1,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ShowChar6x8(uint8_t x,uint8_t y,uint8_t chr,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ShowString(uint8_t x,uint8_t y,uint8_t *chr,uint8_t size1,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ShowNum(uint8_t x,uint8_t y,u32 num,uint8_t len,uint8_t size1,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ShowChinese(uint8_t x,uint8_t y,uint8_t num,uint8_t size1,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ScrollDisplay(uint8_t num,uint8_t space,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ShowPicture(uint8_t x,uint8_t y,uint8_t sizex,uint8_t sizey,uint8_t BMP[],uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_Init(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
    
12. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#endif</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">size1,uint8_t mode);
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13. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ScrollDisplay(uint8_t num,uint8_t space,uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_ShowPicture(uint8_t x,uint8_t y,uint8_t sizex,uint8_t sizey,uint8_t BMP[],uint8_t mode);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">void OLED_Init(void);</font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">
    
14. </font></font></font></div><div align="left"><font face="Tahoma"><font size="3"><font color="#000000">#endif</font></font></font></div>

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转载自：MCU学习笔记