如何编程使stm32单片机与oled显示屏通信?
时间: 2023-07-16 14:12:53 浏览: 907
要使STM32单片机与OLED显示屏通信,您需要了解以下几个方面:
1. OLED显示屏的通信协议。通常,OLED屏幕使用SPI或I2C协议进行通信。SPI协议是一种同步协议,使用4个线(CLK、MOSI、MISO和CS)进行通信。而I2C协议是一种异步协议,使用两个线(SDA和SCL)进行通信。
2. STM32单片机的通信接口。STM32单片机支持SPI和I2C协议,因此您需要选择适合您的OLED显示屏的通信接口。
3. 编程。您需要编写代码来配置STM32单片机的通信接口,并将数据发送到OLED显示屏上。
以下是一个使用STM32单片机和SPI协议的OLED显示屏通信的示例代码:
```c
#include "stm32f10x.h"
#include "stm32f10x_spi.h"
#include "stm32f10x_gpio.h"
// OLED显示屏的CS引脚
#define OLED_CS_PIN GPIO_Pin_0
#define OLED_CS_PORT GPIOA
// OLED显示屏的DC引脚
#define OLED_DC_PIN GPIO_Pin_1
#define OLED_DC_PORT GPIOA
// OLED显示屏的RES引脚
#define OLED_RES_PIN GPIO_Pin_2
#define OLED_RES_PORT GPIOA
// OLED显示屏初始化函数
void OLED_Init(void)
{
// 使能GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
// 配置OLED_CS引脚为输出模式
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = OLED_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(OLED_CS_PORT, &GPIO_InitStructure);
// 配置OLED_DC引脚为输出模式
GPIO_InitStructure.GPIO_Pin = OLED_DC_PIN;
GPIO_Init(OLED_DC_PORT, &GPIO_InitStructure);
// 配置OLED_RES引脚为输出模式
GPIO_InitStructure.GPIO_Pin = OLED_RES_PIN;
GPIO_Init(OLED_RES_PORT, &GPIO_InitStructure);
// 初始化SPI接口
SPI_InitTypeDef SPI_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);
// 初始化OLED显示屏
GPIO_SetBits(OLED_RES_PORT, OLED_RES_PIN);
GPIO_ResetBits(OLED_CS_PORT, OLED_CS_PIN);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xAE);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x00);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x10);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x40);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x81);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xCF);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xA1);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xC8);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xA6);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xA8);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x3F);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xD3);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x00);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xD5);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x80);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xD9);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xF1);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xDA);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x12);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xDB);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x40);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x20);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x02);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x8D);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0x14);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xA4);
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xA6);
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xAF);
GPIO_ResetBits(OLED_CS_PORT, OLED_CS_PIN);
}
// 在OLED显示屏上绘制一个像素
void OLED_DrawPixel(uint8_t x, uint8_t y)
{
GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xB0 + y); // 设置行地址
SPI_SendData8(SPI1, ((x & 0xF0) >> 4) | 0x10); // 设置列地址的高4位
SPI_SendData8(SPI1, (x & 0x0F) | 0x00); // 设置列地址的低4位
GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
SPI_SendData8(SPI1, 0xFF); // 绘制一个像素
}
int main(void)
{
// 初始化OLED显示屏
OLED_Init();
// 在OLED显示屏上绘制一个像素
OLED_DrawPixel(10, 10);
while (1)
{
}
}
```
在这个示例中,我们使用SPI1接口连接到OLED显示屏,并在OLED显示屏上绘制一个像素。您可以根据自己的需要修改代码。
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