stm32f103c8t64针OLED显示屏代码

以下是将STM32F103C8T6与128x64 OLED显示屏连接并显示一些文本的示例代码：

#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_spi.h"
#include "fonts.h"

// OLED屏幕定义
#define OLED_RESET_PIN GPIO_Pin_0
#define OLED_RESET_PORT GPIOB
#define OLED_DC_PIN GPIO_Pin_1
#define OLED_DC_PORT GPIOB
#define OLED_CS_PIN GPIO_Pin_12
#define OLED_CS_PORT GPIOB
#define OLED_SPI SPI2
#define OLED_SPI_CLK RCC_APB1Periph_SPI2
#define OLED_SPI_GPIO_CLK RCC_APB2Periph_GPIOB

// OLED屏幕初始化
void OLED_Init(void) {
    GPIO_InitTypeDef GPIO_InitStructure;
    SPI_InitTypeDef SPI_InitStructure;

    // 打开GPIO和SPI的时钟
    RCC_APB2PeriphClockCmd(OLED_SPI_GPIO_CLK, ENABLE);
    RCC_APB1PeriphClockCmd(OLED_SPI_CLK, ENABLE);

    // 配置SPI引脚
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_15;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOB, &GPIO_InitStructure);
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOB, &GPIO_InitStructure);

    // 配置OLED引脚
    GPIO_InitStructure.GPIO_Pin = OLED_RESET_PIN | OLED_DC_PIN | OLED_CS_PIN;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_Init(OLED_RESET_PORT, &GPIO_InitStructure);

    // 初始化OLED屏幕
    GPIO_SetBits(OLED_RESET_PORT, OLED_RESET_PIN);
    GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
    GPIO_SetBits(OLED_CS_PORT, OLED_CS_PIN);
    SPI_Cmd(OLED_SPI, 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_High;
    SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
    SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
    SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
    SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
    SPI_Init(OLED_SPI, &SPI_InitStructure);

    // 清屏
    OLED_Clear();
}

// 写入OLED命令
void OLED_WriteCmd(uint8_t cmd) {
    GPIO_ResetBits(OLED_DC_PORT, OLED_DC_PIN);
    GPIO_ResetBits(OLED_CS_PORT, OLED_CS_PIN);
    SPI_I2S_SendData(OLED_SPI, cmd);
    while (SPI_I2S_GetFlagStatus(OLED_SPI, SPI_I2S_FLAG_BSY) == SET);
    GPIO_SetBits(OLED_CS_PORT, OLED_CS_PIN);
}

// 写入OLED数据
void OLED_WriteData(uint8_t data) {
    GPIO_SetBits(OLED_DC_PORT, OLED_DC_PIN);
    GPIO_ResetBits(OLED_CS_PORT, OLED_CS_PIN);
    SPI_I2S_SendData(OLED_SPI, data);
    while (SPI_I2S_GetFlagStatus(OLED_SPI, SPI_I2S_FLAG_BSY) == SET);
    GPIO_SetBits(OLED_CS_PORT, OLED_CS_PIN);
}

// 清除OLED屏幕
void OLED_Clear(void) {
    uint8_t i, j;
    for (i = 0; i < 8; i++) {
        OLED_WriteCmd(0xb0 + i);
        OLED_WriteCmd(0x00);
        OLED_WriteCmd(0x10);
        for (j = 0; j < 128; j++) {
            OLED_WriteData(0x00);
        }
    }
}

// 在OLED屏幕上显示文本
void OLED_ShowString(uint8_t x, uint8_t y, const char *str) {
    uint8_t c = 0, i = 0, j = 0;
    while (str[j] != '\0') {
        c = str[j] - 32;
        if (x > 128 - 1) {
            x = 0;
            y++;
        }
        if (y > 8 - 1) {
            y = x = 0;
            OLED_Clear();
        }
        OLED_WriteCmd(0xb0 + y);
        OLED_WriteCmd(((x & 0xf0) >> 4) | 0x10);
        OLED_WriteCmd(x & 0x0f);
        for (i = 0; i < 8; i++) {
            OLED_WriteData(FONT8x8[c][i]);
        }
        x += 8;
        j++;
    }
}

int main(void) {
    // 初始化OLED屏幕
    OLED_Init();

    // 在OLED屏幕上显示文本
    OLED_ShowString(0, 0, "Hello World!");

    while (1);
}

需要注意的是，该代码使用了SPI2来驱动OLED屏幕，因此需要在STM32的GPIOB引脚上连接SPI2的SCK、MOSI和MISO引脚。另外，该代码假定OLED屏幕已经按照128x64的格式连接到STM32F103C8T6的引脚上。