前言
在学习stm32中....
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硬件连接
GND -- GND
VCC -- 3.3v
SCL -- B8
SDA -- B9
驱动代码
OLED.h头文件
- #ifndef __OLED_H
- #define __OLED_H
- void OLED_Init(void);
- void OLED_Clear(void);
- void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char);
- void OLED_ShowString(uint8_t Line, uint8_t Column, char *String);
- void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
- void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length);
- void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
- void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length);
- #endif
复制代码 OLED.c
- #include "stm32f10x.h"
- #include "OLED_Font.h"
- /*引脚配置*/
- #define OLED_W_SCL(x) GPIO_WriteBit(GPIOB, GPIO_Pin_8, (BitAction)(x))
- #define OLED_W_SDA(x) GPIO_WriteBit(GPIOB, GPIO_Pin_9, (BitAction)(x))
- /*引脚初始化*/
- void OLED_I2C_Init(void)
- {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
-
- GPIO_InitTypeDef GPIO_InitStructure;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- OLED_W_SCL(1);
- OLED_W_SDA(1);
- }
- /**
- * @brief I2C开始
- * @param 无
- * @retval 无
- */
- void OLED_I2C_Start(void)
- {
- OLED_W_SDA(1);
- OLED_W_SCL(1);
- OLED_W_SDA(0);
- OLED_W_SCL(0);
- }
- /**
- * @brief I2C停止
- * @param 无
- * @retval 无
- */
- void OLED_I2C_Stop(void)
- {
- OLED_W_SDA(0);
- OLED_W_SCL(1);
- OLED_W_SDA(1);
- }
- /**
- * @brief I2C发送一个字节
- * @param Byte 要发送的一个字节
- * @retval 无
- */
- void OLED_I2C_SendByte(uint8_t Byte)
- {
- uint8_t i;
- for (i = 0; i < 8; i++)
- {
- OLED_W_SDA(Byte & (0x80 >> i));
- OLED_W_SCL(1);
- OLED_W_SCL(0);
- }
- OLED_W_SCL(1); //额外的一个时钟,不处理应答信号
- OLED_W_SCL(0);
- }
- /**
- * @brief OLED写命令
- * @param Command 要写入的命令
- * @retval 无
- */
- void OLED_WriteCommand(uint8_t Command)
- {
- OLED_I2C_Start();
- OLED_I2C_SendByte(0x78); //从机地址
- OLED_I2C_SendByte(0x00); //写命令
- OLED_I2C_SendByte(Command);
- OLED_I2C_Stop();
- }
- /**
- * @brief OLED写数据
- * @param Data 要写入的数据
- * @retval 无
- */
- void OLED_WriteData(uint8_t Data)
- {
- OLED_I2C_Start();
- OLED_I2C_SendByte(0x78); //从机地址
- OLED_I2C_SendByte(0x40); //写数据
- OLED_I2C_SendByte(Data);
- OLED_I2C_Stop();
- }
- /**
- * @brief OLED设置光标位置
- * @param Y 以左上角为原点,向下方向的坐标,范围:0~7
- * @param X 以左上角为原点,向右方向的坐标,范围:0~127
- * @retval 无
- */
- void OLED_SetCursor(uint8_t Y, uint8_t X)
- {
- OLED_WriteCommand(0xB0 | Y); //设置Y位置
- OLED_WriteCommand(0x10 | ((X & 0xF0) >> 4)); //设置X位置高4位
- OLED_WriteCommand(0x00 | (X & 0x0F)); //设置X位置低4位
- }
- /**
- * @brief OLED清屏
- * @param 无
- * @retval 无
- */
- void OLED_Clear(void)
- {
- uint8_t i, j;
- for (j = 0; j < 8; j++)
- {
- OLED_SetCursor(j, 0);
- for(i = 0; i < 128; i++)
- {
- OLED_WriteData(0x00);
- }
- }
- }
- /**
- * @brief OLED显示一个字符
- * @param Line 行位置,范围:1~4
- * @param Column 列位置,范围:1~16
- * @param Char 要显示的一个字符,范围:ASCII可见字符
- * @retval 无
- */
- void OLED_ShowChar(uint8_t Line, uint8_t Column, char Char)
- {
- uint8_t i;
- OLED_SetCursor((Line - 1) * 2, (Column - 1) * 8); //设置光标位置在上半部分
- for (i = 0; i < 8; i++)
- {
- OLED_WriteData(OLED_F8x16[Char - ' '][i]); //显示上半部分内容
- }
- OLED_SetCursor((Line - 1) * 2 + 1, (Column - 1) * 8); //设置光标位置在下半部分
- for (i = 0; i < 8; i++)
- {
- OLED_WriteData(OLED_F8x16[Char - ' '][i + 8]); //显示下半部分内容
- }
- }
- /**
- * @brief OLED显示字符串
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param String 要显示的字符串,范围:ASCII可见字符
- * @retval 无
- */
- void OLED_ShowString(uint8_t Line, uint8_t Column, char *String)
- {
- uint8_t i;
- for (i = 0; String[i] != '\0'; i++)
- {
- OLED_ShowChar(Line, Column + i, String[i]);
- }
- }
- /**
- * @brief OLED次方函数
- * @retval 返回值等于X的Y次方
- */
- uint32_t OLED_Pow(uint32_t X, uint32_t Y)
- {
- uint32_t Result = 1;
- while (Y--)
- {
- Result *= X;
- }
- return Result;
- }
- /**
- * @brief OLED显示数字(十进制,正数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:0~4294967295
- * @param Length 要显示数字的长度,范围:1~10
- * @retval 无
- */
- void OLED_ShowNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
- {
- uint8_t i;
- for (i = 0; i < Length; i++)
- {
- OLED_ShowChar(Line, Column + i, Number / OLED_Pow(10, Length - i - 1) % 10 + '0');
- }
- }
- /**
- * @brief OLED显示数字(十进制,带符号数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:-2147483648~2147483647
- * @param Length 要显示数字的长度,范围:1~10
- * @retval 无
- */
- void OLED_ShowSignedNum(uint8_t Line, uint8_t Column, int32_t Number, uint8_t Length)
- {
- uint8_t i;
- uint32_t Number1;
- if (Number >= 0)
- {
- OLED_ShowChar(Line, Column, '+');
- Number1 = Number;
- }
- else
- {
- OLED_ShowChar(Line, Column, '-');
- Number1 = -Number;
- }
- for (i = 0; i < Length; i++)
- {
- OLED_ShowChar(Line, Column + i + 1, Number1 / OLED_Pow(10, Length - i - 1) % 10 + '0');
- }
- }
- /**
- * @brief OLED显示数字(十六进制,正数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:0~0xFFFFFFFF
- * @param Length 要显示数字的长度,范围:1~8
- * @retval 无
- */
- void OLED_ShowHexNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
- {
- uint8_t i, SingleNumber;
- for (i = 0; i < Length; i++)
- {
- SingleNumber = Number / OLED_Pow(16, Length - i - 1) % 16;
- if (SingleNumber < 10)
- {
- OLED_ShowChar(Line, Column + i, SingleNumber + '0');
- }
- else
- {
- OLED_ShowChar(Line, Column + i, SingleNumber - 10 + 'A');
- }
- }
- }
- /**
- * @brief OLED显示数字(二进制,正数)
- * @param Line 起始行位置,范围:1~4
- * @param Column 起始列位置,范围:1~16
- * @param Number 要显示的数字,范围:0~1111 1111 1111 1111
- * @param Length 要显示数字的长度,范围:1~16
- * @retval 无
- */
- void OLED_ShowBinNum(uint8_t Line, uint8_t Column, uint32_t Number, uint8_t Length)
- {
- uint8_t i;
- for (i = 0; i < Length; i++)
- {
- OLED_ShowChar(Line, Column + i, Number / OLED_Pow(2, Length - i - 1) % 2 + '0');
- }
- }
- /**
- * @brief OLED初始化
- * @param 无
- * @retval 无
- */
- void OLED_Init(void)
- {
- uint32_t i, j;
-
- for (i = 0; i < 1000; i++) //上电延时
- {
- for (j = 0; j < 1000; j++);
- }
-
- OLED_I2C_Init(); //端口初始化
-
- OLED_WriteCommand(0xAE); //关闭显示
-
- OLED_WriteCommand(0xD5); //设置显示时钟分频比/振荡器频率
- OLED_WriteCommand(0x80);
-
- OLED_WriteCommand(0xA8); //设置多路复用率
- OLED_WriteCommand(0x3F);
-
- OLED_WriteCommand(0xD3); //设置显示偏移
- OLED_WriteCommand(0x00);
-
- OLED_WriteCommand(0x40); //设置显示开始行
-
- OLED_WriteCommand(0xA1); //设置左右方向,0xA1正常 0xA0左右反置
-
- OLED_WriteCommand(0xC8); //设置上下方向,0xC8正常 0xC0上下反置
- OLED_WriteCommand(0xDA); //设置COM引脚硬件配置
- OLED_WriteCommand(0x12);
-
- OLED_WriteCommand(0x81); //设置对比度控制
- OLED_WriteCommand(0xCF);
- OLED_WriteCommand(0xD9); //设置预充电周期
- OLED_WriteCommand(0xF1);
- OLED_WriteCommand(0xDB); //设置VCOMH取消选择级别
- OLED_WriteCommand(0x30);
- OLED_WriteCommand(0xA4); //设置整个显示打开/关闭
- OLED_WriteCommand(0xA6); //设置正常/倒转显示
- OLED_WriteCommand(0x8D); //设置充电泵
- OLED_WriteCommand(0x14);
- OLED_WriteCommand(0xAF); //开启显示
-
- OLED_Clear(); //OLED清屏
- }
复制代码
主函数main.c
- #include "stm32f10x.h"
- #include "OLED.h"
- #include "max30102.h"
- // 延时函数
- void delay_ms(uint32_t ms) {
- uint32_t i;
- for (i = 0; i < ms * 1000; i++) {
- __NOP();
- }
- }
- // LED 绿灯
- void LED_Init() {
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
- GPIO_InitTypeDef GPIO_InitStruct;
- GPIO_InitStruct.GPIO_Mode = GPIO_Mode_Out_PP;
- GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13;
- GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOC, &GPIO_InitStruct);
-
- }
- void countTime() {
- // 倒计时逻辑
- for (int i = 0; i <= 10; i++) {
- OLED_ShowNum(4, 7, i, 2); // 更新倒计时显示
- OLED_ShowString(4, 9, "s");
- delay_ms(7000);
- //if(i == 0) {
- // i = 60;
- //}
- }
- // 倒计时结束,显示结束信息
- OLED_Clear();
- //OLED_ShowString(2, 1, "Time's up!");
- OLED_ShowString(1, 2, "Case: Max30102");
- OLED_ShowString(2, 4, "2024-04-07");
- OLED_ShowString(3, 1, "HR:");
- OLED_ShowString(4, 1, "SpO2:");
- }
- // OLED屏显示内容
- void showOLED() {
- OLED_Init();
- OLED_ShowString(1, 2, "Case: Max30102");
- OLED_ShowString(2, 4, "2024-04-07");
- OLED_ShowString(3, 1, "Put your finger");
-
- if(MAX30102_INIT_FAILED) {
- countTime();
- } else {
- OLED_ShowString(4, 4, "No finger");
- }
- }
- int main(void) {
- //LED_Init();
-
- showOLED();
-
- }
复制代码
效果
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