stm32 OLED屏幕 代码
时间: 2023-07-02 18:16:38 浏览: 42
以下是基于STM32的OLED屏幕的代码示例,该示例使用I2C协议进行通讯:
```
#include "stm32f10x.h"
#include "stm32f10x_i2c.h"
#define OLED_ADDRESS 0x78 // OLED屏幕的I2C地址
void OLED_Init()
{
I2C_InitTypeDef I2C_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); // 使能GPIOB时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE); // 使能I2C1时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure); // 初始化I2C引脚
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 0x00;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 400000;
I2C_Init(I2C1, &I2C_InitStructure); // 配置I2C参数
I2C_Cmd(I2C1, ENABLE); // 使能I2C
// OLED屏幕初始化命令
uint8_t init_command[] = {0xAE, 0x00, 0x10, 0x40, 0x81, 0xCF, 0xA1, 0xC8, 0xA6, 0xA8, 0x3F, 0xD3, 0x00, 0xD5, 0x80, 0xD9, 0xF1, 0xDA, 0x12, 0xDB, 0x40, 0x20, 0x02, 0x8D, 0x14, 0xA4, 0xA6, 0xAF};
uint8_t *command_ptr = init_command;
while(*command_ptr)
{
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, OLED_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, 0x00);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, *command_ptr++);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
}
// 清屏
uint8_t clear_command[] = {0x21, 0x00, 0x7F, 0x22, 0x00, 0x07};
command_ptr = clear_command;
while(*command_ptr)
{
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, OLED_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, 0x00);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, *command_ptr++);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
}
}
void OLED_DisplayChar(uint8_t x, uint8_t y, char ch)
{
uint8_t i, j;
uint8_t buffer[6] = {0x00};
uint8_t *buffer_ptr = buffer;
ch -= 32;
for(i = 0; i < 6; i++)
{
*buffer_ptr++ = Font6x8[ch][i];
}
buffer_ptr = buffer;
// 设置坐标
uint8_t setpos_command[] = {0x21, x, x + 5, 0x22, y, y};
uint8_t *command_ptr = setpos_command;
while(*command_ptr)
{
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, OLED_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, 0x00);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, *command_ptr++);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
}
// 发送字符
command_ptr = buffer;
for(i = 0; i < 8; i++)
{
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, OLED_ADDRESS, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, 0x40);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
for(j = 0; j < 6; j++)
{
I2C_SendData(I2C1, *buffer_ptr++);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
I2C_GenerateSTOP(I2C1, ENABLE);
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
}
}
void OLED_DisplayString(uint8_t x, uint8_t y, char *str)
{
while(*str)
{
OLED_DisplayChar(x, y, *str++);
x += 6;
if(x > 122)
{
x = 0;
y += 8;
}
}
}
int main(void)
{
OLED_Init();
OLED_DisplayString(0, 0, "Hello, world!");
while(1);
}
```
该示例使用了一种简单的字体格式,存储在名为Font6x8的数组中。此外,还实现了一些基本的绘图功能,如在屏幕上显示字符串和字符。最后,请注意,该示例是基于STM32F10x系列的。如果您使用不同的STM32系列,则需要相应地更改代码。