STM32G030F6P6基于模拟IIC驱动1.54寸OLED屏幕/ E* ]5 d% k4 U) v7 E: W8 R: u2 S$ e& ]
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 9 `0 z6 w) C9 R/ p: ^- y0 ~5 j
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。 . q2 t1 E6 @) K1 f. R& g
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。 4 L0 a) _$ b, x- c
2 ~6 B( u( W% ]0 Y" p) {4 X3 u9 D- <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)" T0 a% ~* s7 x7 E, a" w
- </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>
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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。 - <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">
& N: X. G$ c7 O U - </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">
' ~+ b1 i# A X; F4 G - </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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- </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">
' f( r" y ?/ \7 P - </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">
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/ I. w# T% O* W4 W+ n - </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">
$ d4 r2 ~! Y) j% J2 O7 t - </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">( y( ?# D, ?+ q& a6 P
- </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">: F8 e6 p! b! ? W
- </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);
. x9 i( [7 o' k" S7 @" s( C - </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">
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转载自:MCU学习笔记 |