ek-tm4c123gxl的OLED代码

EK-TM4C123GXL是德州仪器（TI）推出的一款基于ARM Cortex-M4内核的微控制器开发板，而OLED则是一种显示屏，常用于显示文字和图像。在使用EK-TM4C123GXL开发板进行OLED显示时，需要使用相应的驱动程序。以下是一个简单的OLED显示代码示例：

#include "inc/hw_memmap.h"
#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"
#include "driverlib/ssi.h"

#define SSI0_BASE       GPIO_PORTA_BASE
#define SSI0_CLK        GPIO_PIN_2
#define SSI0_FSS        GPIO_PIN_3
#define SSI0_RX         GPIO_PIN_4
#define SSI0_TX         GPIO_PIN_5

void OLED_Init(void)
{
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
    while(!SysCtlPeripheralReady(SYSCTL_PERIPH_GPIOA));
    GPIOPinConfigure(GPIO_PA2_SSI0CLK);
    GPIOPinConfigure(GPIO_PA3_SSI0FSS);
    GPIOPinConfigure(GPIO_PA4_SSI0RX);
    GPIOPinConfigure(GPIO_PA5_SSI0TX);
    GPIOPinTypeSSI(GPIO_PORTA_BASE, SSI0_CLK | SSI0_FSS | SSI0_RX | SSI0_TX);

    SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI0);
    while(!SysCtlPeripheralReady(SYSCTL_PERIPH_SSI0));
    SSIConfigSetExpClk(SSI0_BASE, SysCtlClockGet(), SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER, 1000000, 8);
    SSIEnable(SSI0_BASE);
}

void OLED_WriteCmd(uint8_t cmd)
{
    GPIOPinWrite(GPIO_PORTA_BASE, SSI0_FSS, 0);
    SSIDataPut(SSI0_BASE, 0x00);
    SSIDataPut(SSI0_BASE, cmd);
    while(SSIBusy(SSI0_BASE));
    GPIOPinWrite(GPIO_PORTA_BASE, SSI0_FSS, SSI0_FSS);
}

void OLED_WriteDat(uint8_t dat)
{
    GPIOPinWrite(GPIO_PORTA_BASE, SSI0_FSS, 0);
    SSIDataPut(SSI0_BASE, 0x40);
    SSIDataPut(SSI0_BASE, dat);
    while(SSIBusy(SSI0_BASE));
    GPIOPinWrite(GPIO_PORTA_BASE, SSI0_FSS, SSI0_FSS);
}

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_WriteDat(0x00);
    }
}

void OLED_ShowChar(uint8_t x,uint8_t y,uint8_t chr,uint8_t size,uint8_t mode)
{
    uint8_t i,m,temp,size1;
    size1 = (size / 8 + ((size % 8) ? 1 : 0)) * (size / 2); //计算字符所占的字节数
    chr = chr - ' '; //获取偏移后的值
    for(i=0;i<size1;i++)
    {
        switch(size)
        {
            case 12:
                temp = asc2_1206[chr][i];
                break;
            case 16:
                temp = asc2_1608[chr][i];
                break;
            default:
                return;
        }
        for(m=0;m<8;m++)
        {
            if(temp & 0x80)
                OLED_DrawPoint(x+m,y+i,mode);
            temp <<= 1;
        }
    }
}

void OLED_DrawPoint(uint8_t x,uint8_t y,uint8_t mode)
{
    uint8_t page = y/8;
    uint8_t column = x;
    OLED_WriteCmd(0xb0+page);
    OLED_WriteCmd(column&0x0f);
    OLED_WriteCmd(((column&0xf0)>>4)|0x10);
    if(mode == 1)
        OLED_WriteDat(0xff);
    else
        OLED_WriteDat(0x00);
}

void OLED_ShowString(uint8_t x,uint8_t y,char *chr,uint8_t size,uint8_t mode)
{
    while((*chr)!='\0')
    {
        if(x > 120)
        {
            x = 0;
            y += size;
        }
        if(y > 56)
        {
            y = x = 0;
            OLED_Clear();
        }
        OLED_ShowChar(x,y,*chr,size,mode);
        x += size / 2;
        chr++;
    }
}

int main(void)
{
    SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ); //设置系统时钟为16MHz

    OLED_Init(); //初始化OLED

    OLED_Clear(); //清屏

    OLED_ShowString(10,10,"Hello World!",16,1); //显示字符串

    while(1);

}

该代码中包含了OLED初始化函数、清屏函数、显示字符函数、绘制点函数和显示字符串函数等，可以根据自己的需求进行相应的修改。