esp32c3的SD库在这里下载：https://github.com/nhatuan84/esp32-micro-sdcard
显示屏库还是用Arduino_GFX:https://github.com/moononournation/Arduino_GFX/
硬件链接如下：
esp32c3 SD card Module
GPIO02---->SCK
GPIO03---->MOSI
GPIO10---->MISO
GPIO06---->CS
3.3V------>3V3
GND------->GND
esp32c3 1.8'TFT
GPIO02---->SCL
GPIO03---->SDA
GPIO05---->DC
GPIO07---->CS
GPIO04---->RES
3.3V------>VCC
GND------->GND
显示效果：

#include <SPI.h>
#include <mySD.h>
#include <Arduino_GFX_Library.h>

File bmpFile;
unsigned short pic[0x5000]; // 128*160图像0x5000像素
byte aByte;                 // 1字节数据

Arduino_DataBus *bus = new Arduino_ESP32SPI(5 /* DC */, 7 /* CS */, 2 /* SCK */, 3 /* MOSI */);
Arduino_GFX *gfx = new Arduino_ST7735(bus, 4 /* RST */, 2 /* 旋转屏幕180度 */, false);

void setup()
{
    Serial.begin(115200);

    //从SD卡读取图片
    if (!SD.begin(6, 3, 10, 2))
    {
        Serial.println("initialization SD card failed!");
        return;
    }
    Serial.println("initialization SD card done.");

    bmpFile = SD.open("01.bmp", FILE_READ);
    if (bmpFile)
    {
        Serial.println("Reading 01.bmp...");

        //显示图片
        while (bmpFile.available())
        {
            //跳过前0x36个字节的头
            for (int i = 0; i < 0x36; i++)
            {
                Serial.print(bmpFile.read(), HEX);
                Serial.print(" ");
            }
            //把rgb24转换成rgb16
            for (int i = 0; i < 0x5000; i++)
            {
                aByte = bmpFile.read();
                pic[i] = (aByte * 32 / 256) << 11;
                aByte = bmpFile.read();
                pic[i] |= (aByte * 64 / 256) << 5;
                aByte = bmpFile.read();
                pic[i] |= (aByte * 32 / 256);
            }
            Serial.println("OK");
        }
        bmpFile.close();
    }
    else
    {
        Serial.println("error Reading 01.bmp");
    }

    //显示图片
    gfx->begin();
    gfx->fillScreen(BLACK);
    gfx->draw16bitRGBBitmap(0, 0, pic, 128, 160);
    delay(1000);
}

void loop()
{
}