四针oled stm32c8t6hal库驱动

对于STM32C8T6HAL库驱动四针OLED显示屏，可以按照以下步骤进行：

1. 首先要确定OLED屏幕的型号和通信协议，一般为I2C或SPI协议。

2. 在HAL库中找到相应的I2C或SPI驱动函数，按照屏幕型号和通信协议进行配置。

3. 根据OLED屏幕的数据手册，编写相应的初始化函数和显示函数，例如可以使用SSD1306驱动芯片的OLED屏幕，初始化函数和显示函数如下：

// OLED屏幕初始化函数
void OLED_Init(void)
{
    HAL_Delay(100);
    HAL_GPIO_WritePin(OLED_RES_GPIO_Port, OLED_RES_Pin, GPIO_PIN_RESET);
    HAL_Delay(200);
    HAL_GPIO_WritePin(OLED_RES_GPIO_Port, OLED_RES_Pin, GPIO_PIN_SET);
    HAL_Delay(200);
    OLED_Write_Command(0xAE);
    OLED_Write_Command(0xD5);
    OLED_Write_Command(0x80);
    OLED_Write_Command(0xA8);
    OLED_Write_Command(0x3F);
    OLED_Write_Command(0xD3);
    OLED_Write_Command(0x00);
    OLED_Write_Command(0x40);
    OLED_Write_Command(0x8D);
    OLED_Write_Command(0x14);
    OLED_Write_Command(0x20);
    OLED_Write_Command(0x00);
    OLED_Write_Command(0xA1);
    OLED_Write_Command(0xC8);
    OLED_Write_Command(0xDA);
    OLED_Write_Command(0x12);
    OLED_Write_Command(0x81);
    OLED_Write_Command(0xCF);
    OLED_Write_Command(0xD9);
    OLED_Write_Command(0xF1);
    OLED_Write_Command(0xDB);
    OLED_Write_Command(0x40);
    OLED_Write_Command(0xA4);
    OLED_Write_Command(0xA6);
    OLED_Write_Command(0xAF);
}

// OLED屏幕显示函数
void OLED_Show_String(uint8_t x, uint8_t y, uint8_t *str)
{
    uint8_t i = 0;
    while (str[i] != '\0')
    {
        OLED_Show_Char(x, y, str[i]);
        x += 8;
        i++;
    }
}

void OLED_Show_Char(uint8_t x, uint8_t y, uint8_t chr)
{
    uint8_t c = 0, i = 0;
    c = chr - ' ';
    if (x > 122)
    {
        x = 0;
        y++;
    }
    OLED_Set_Pos(x, y);
    for (i = 0; i < 8; i++)
    {
        OLED_Write_Data(F8X16[c * 16 + i]);
    }
    OLED_Set_Pos(x, y + 1);
    for (i = 0; i < 8; i++)
    {
        OLED_Write_Data(F8X16[c * 16 + i + 8]);
    }
}

void OLED_Write_Command(uint8_t cmd)
{
    HAL_I2C_Mem_Write(&hi2c1, OLED_ADDR, 0x00, I2C_MEMADD_SIZE_8BIT, &cmd, 1, 100);
}

void OLED_Write_Data(uint8_t data)
{
    HAL_I2C_Mem_Write(&hi2c1, OLED_ADDR, 0x40, I2C_MEMADD_SIZE_8BIT, &data, 1, 100);
}

void OLED_Set_Pos(uint8_t x, uint8_t y)
{
    OLED_Write_Command(0xb0 + y);
    OLED_Write_Command(x & 0x0f);
    OLED_Write_Command(((x & 0xf0) >> 4) | 0x10);
}

4. 在main函数中调用初始化函数和显示函数即可。

以上是一个简单的示例代码，具体实现还需要根据实际情况进行调整。