用keil写一个使OLED 屏幕亮的代码

好的，以下是用Keil写使OLED屏幕亮的代码：

首先，需要在代码中定义OLED的引脚：

#define OLED_SDA  P1_1 // 数据引脚
#define OLED_SCL  P1_0 // 时钟引脚

然后，需要初始化OLED屏幕，即向OLED发送一些命令，使其进入正常工作状态：

void OLED_Init() {
    Write_Command(0xAE);//display off
    Write_Command(0x20);//Set Memory Addressing Mode
    Write_Command(0x10);//00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
    Write_Command(0xB0);//Set Page Start Address for Page Addressing Mode,0-7
    Write_Command(0xC8);//Set COM Output Scan Direction
    Write_Command(0x00);//---set low column address
    Write_Command(0x10);//---set high column address
    Write_Command(0x40);//--set start line address
    Write_Command(0x81);//--set contrast control register
    Write_Command(0xFF);
    Write_Command(0xA1);//--set segment re-map 0 to 127
    Write_Command(0xA6);//--set normal display
    Write_Command(0xA8);//--set multiplex ratio(1 to 64)
    Write_Command(0x3F);//--1/64 duty
    Write_Command(0xA4);//0xa4,Output follows RAM content;0xa5,Output ignores RAM content
    Write_Command(0xD3);//-set display offset
    Write_Command(0x00);//-not offset
    Write_Command(0xD5);//--set display clock divide ratio/oscillator frequency
    Write_Command(0xF0);//--set divide ratio
    Write_Command(0xD9);//--set pre-charge period
    Write_Command(0x22); //
    Write_Command(0xDA);//--set com pins hardware configuration
    Write_Command(0x12);
    Write_Command(0xDB);//--set vcomh
    Write_Command(0x20);//0x20,0.77xVcc
    Write_Command(0x8D);//--set DC-DC enable
    Write_Command(0x14):// bit2，1 enabled both supplies ，0 disabled both supplies
    Write_Command(0xAF);//--turn on oled panel
}

接下来，需要写一个函数来向OLED屏幕发送数据或命令：

void Write_Command(unsigned char dat) {
    unsigned char i;
    OLED_SCL = 0;
    for(i=0;i<8;i++) {
        OLED_SDA = 0;
        OLED_SCL = 1;
        OLED_SCL = 0;
        OLED_SDA = dat&0x80;
        dat <<= 1;
    }
    OLED_SCL=0;
    OLED_SCL=1;
    OLED_SCL=0;
}

最后，在主函数中调用OLED_Init函数来初始化OLED屏幕，并调用Write_Command函数发送让OLED屏幕亮起的命令：

int main(void) {
    OLED_Init();
    Write_Command(0xAF); // turn on OLED panel
    while(1);
}

以上代码是基于8051单片机的Keil开发环境编写的，需要按照具体硬件配置进行修改才能在实际应用中使用。