stm32hal库iic驱动oled屏幕源码

以下是使用STM32 HAL库驱动OLED屏幕的源代码。请注意，这只是一个基本的示例，可能需要根据您的硬件和要求进行修改。

#include "stm32xxxx.h"
#include "stm32xxxx_hal.h"

#define OLED_ADDR 0x78

I2C_HandleTypeDef hi2c;

void OLED_Init(void)
{
    uint8_t init_cmds[] = {0xAE, 0xD5, 0x80, 0xA8, 0x3F, 0xD3, 0x00, 0x40, 0x8D, 0x14, 0x20, 0x00, 0xA0, 0xC8, 0xDA, 0x12, 0x81, 0xCF, 0xD9, 0xF1, 0xDB, 0x40, 0xA4, 0xA6, 0xAF};
    uint8_t i;
    for (i = 0; i < sizeof(init_cmds); i++)
    {
        HAL_I2C_Mem_Write(&hi2c, OLED_ADDR, 0x00, 1, &init_cmds[i], 1, 10);
    }
}

void OLED_SetPos(uint8_t x, uint8_t y)
{
    HAL_I2C_Mem_Write(&hi2c, OLED_ADDR, 0x00, 1, &x, 1, 10);
    HAL_I2C_Mem_Write(&hi2c, OLED_ADDR, 0x00, 1, &y, 1, 10);
}

void OLED_WriteCmd(uint8_t cmd)
{
    uint8_t buf[2] = {0x00, cmd};
    HAL_I2C_Master_Transmit(&hi2c, OLED_ADDR, buf, 2, 10);
}

void OLED_WriteData(uint8_t data)
{
    uint8_t buf[2] = {0x40, data};
    HAL_I2C_Master_Transmit(&hi2c, OLED_ADDR, buf, 2, 10);
}

void OLED_Clear(void)
{
    uint8_t i, j;
    for (i = 0; i < 8; i++)
    {
        OLED_SetPos(i, 0);
        for (j = 0; j < 128; j++)
        {
            OLED_WriteData(0x00);
        }
    }
}

void OLED_PutChar(uint8_t x, uint8_t y, uint8_t c)
{
    uint8_t i, j, tmp;
    tmp = c - ' ';
    for (i = 0; i < 8; i++)
    {
        OLED_SetPos(x, y + i);
        for (j = 0; j < 6; j++)
        {
            if ((Font6x8[tmp][j] >> i) & 0x01)
            {
                OLED_WriteData(0xff);
            }
            else
            {
                OLED_WriteData(0x00);
            }
        }
    }
}

void OLED_PutString(uint8_t x, uint8_t y, uint8_t *str)
{
    while (*str != '\0')
    {
        OLED_PutChar(x, y, *str++);
        x += 6;
    }
}

int main(void)
{
    uint8_t buffer[2];
    HAL_Init();
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    __HAL_RCC_I2C1_CLK_ENABLE();

    GPIO_InitTypeDef gpio_init;
    gpio_init.Pin = GPIO_PIN_6 | GPIO_PIN_7;
    gpio_init.Mode = GPIO_MODE_AF_OD;
    gpio_init.Pull = GPIO_PULLUP;
    gpio_init.Speed = GPIO_SPEED_FREQ_HIGH;
    gpio_init.Alternate = GPIO_AF4_I2C1;
    HAL_GPIO_Init(GPIOB, &gpio_init);

    hi2c.Instance = I2C1;
    hi2c.Init.Timing = 0x10909CEC;
    hi2c.Init.OwnAddress1 = 0;
    hi2c.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
    hi2c.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
    hi2c.Init.OwnAddress2 = 0;
    hi2c.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
    hi2c.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
    if (HAL_I2C_Init(&hi2c) != HAL_OK)
    {
        Error_Handler();
    }

    OLED_Init();
    OLED_Clear();
    OLED_PutString(0, 0, "Hello, World!");

    while (1)
    {
    }
}

请注意，此示例假定您的OLED屏幕使用I2C接口，并且连接到STM32的I2C1端口。您需要根据您的硬件和要求进行修改。