ESP32用I2C驱动OLED（SSD1306）

#include <stdio.h>
#include <string.h>
#include "driver/i2c.h"

#define I2C_OLED I2C_NUM_0
#define I2C_OLED_SDA_IO 33
#define I2C_OLED_SCL_IO 16
#define I2C_OLED_SPEED 1000000 // unit: Hz

#define OLED_CMD 0
#define OLED_DATA 1

static int8_t asc_0806[][6] ={
    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00},// sp
    {0x00, 0x00, 0x00, 0x2f, 0x00, 0x00},// !
    {0x00, 0x00, 0x07, 0x00, 0x07, 0x00},// "
    {0x00, 0x14, 0x7f, 0x14, 0x7f, 0x14},// #
    {0x00, 0x24, 0x2a, 0x7f, 0x2a, 0x12},// $
    {0x00, 0x62, 0x64, 0x08, 0x13, 0x23},// %
    {0x00, 0x36, 0x49, 0x55, 0x22, 0x50},// &
    {0x00, 0x00, 0x05, 0x03, 0x00, 0x00},// '
    {0x00, 0x00, 0x1c, 0x22, 0x41, 0x00},// (
    {0x00, 0x00, 0x41, 0x22, 0x1c, 0x00},// )
    {0x00, 0x14, 0x08, 0x3E, 0x08, 0x14},// *
    {0x00, 0x08, 0x08, 0x3E, 0x08, 0x08},// +
    {0x00, 0x00, 0x00, 0xA0, 0x60, 0x00},// ,
    {0x00, 0x08, 0x08, 0x08, 0x08, 0x08},// -
    {0x00, 0x00, 0x60, 0x60, 0x00, 0x00},// .
    {0x00, 0x20, 0x10, 0x08, 0x04, 0x02},// /
    {0x00, 0x3E, 0x51, 0x49, 0x45, 0x3E},// 0
    {0x00, 0x00, 0x42, 0x7F, 0x40, 0x00},// 1
    {0x00, 0x42, 0x61, 0x51, 0x49, 0x46},// 2
    {0x00, 0x21, 0x41, 0x45, 0x4B, 0x31},// 3
    {0x00, 0x18, 0x14, 0x12, 0x7F, 0x10},// 4
    {0x00, 0x27, 0x45, 0x45, 0x45, 0x39},// 5
    {0x00, 0x3C, 0x4A, 0x49, 0x49, 0x30},// 6
    {0x00, 0x01, 0x71, 0x09, 0x05, 0x03},// 7
    {0x00, 0x36, 0x49, 0x49, 0x49, 0x36},// 8
    {0x00, 0x06, 0x49, 0x49, 0x29, 0x1E},// 9
    {0x00, 0x00, 0x36, 0x36, 0x00, 0x00},// :
    {0x00, 0x00, 0x56, 0x36, 0x00, 0x00},// ;
    {0x00, 0x08, 0x14, 0x22, 0x41, 0x00},// <
    {0x00, 0x14, 0x14, 0x14, 0x14, 0x14},// =
    {0x00, 0x00, 0x41, 0x22, 0x14, 0x08},// >
    {0x00, 0x02, 0x01, 0x51, 0x09, 0x06},// ?
    {0x00, 0x32, 0x49, 0x59, 0x51, 0x3E},// @
    {0x00, 0x7C, 0x12, 0x11, 0x12, 0x7C},// A
    {0x00, 0x7F, 0x49, 0x49, 0x49, 0x36},// B
    {0x00, 0x3E, 0x41, 0x41, 0x41, 0x22},// C
    {0x00, 0x7F, 0x41, 0x41, 0x22, 0x1C},// D
    {0x00, 0x7F, 0x49, 0x49, 0x49, 0x41},// E
    {0x00, 0x7F, 0x09, 0x09, 0x09, 0x01},// F
    {0x00, 0x3E, 0x41, 0x49, 0x49, 0x7A},// G
    {0x00, 0x7F, 0x08, 0x08, 0x08, 0x7F},// H
    {0x00, 0x00, 0x41, 0x7F, 0x41, 0x00},// I
    {0x00, 0x20, 0x40, 0x41, 0x3F, 0x01},// J
    {0x00, 0x7F, 0x08, 0x14, 0x22, 0x41},// K
    {0x00, 0x7F, 0x40, 0x40, 0x40, 0x40},// L
    {0x00, 0x7F, 0x02, 0x0C, 0x02, 0x7F},// M
    {0x00, 0x7F, 0x04, 0x08, 0x10, 0x7F},// N
    {0x00, 0x3E, 0x41, 0x41, 0x41, 0x3E},// O
    {0x00, 0x7F, 0x09, 0x09, 0x09, 0x06},// P
    {0x00, 0x3E, 0x41, 0x51, 0x21, 0x5E},// Q
    {0x00, 0x7F, 0x09, 0x19, 0x29, 0x46},// R
    {0x00, 0x46, 0x49, 0x49, 0x49, 0x31},// S
    {0x00, 0x01, 0x01, 0x7F, 0x01, 0x01},// T
    {0x00, 0x3F, 0x40, 0x40, 0x40, 0x3F},// U
    {0x00, 0x1F, 0x20, 0x40, 0x20, 0x1F},// V
    {0x00, 0x3F, 0x40, 0x38, 0x40, 0x3F},// W
    {0x00, 0x63, 0x14, 0x08, 0x14, 0x63},// X
    {0x00, 0x07, 0x08, 0x70, 0x08, 0x07},// Y
    {0x00, 0x61, 0x51, 0x49, 0x45, 0x43},// Z
    {0x00, 0x00, 0x7F, 0x41, 0x41, 0x00},// [
    {0x00, 0x55, 0x2A, 0x55, 0x2A, 0x55},// 55
    {0x00, 0x00, 0x41, 0x41, 0x7F, 0x00},// ]
    {0x00, 0x04, 0x02, 0x01, 0x02, 0x04},// ^
    {0x00, 0x40, 0x40, 0x40, 0x40, 0x40},// _
    {0x00, 0x00, 0x01, 0x02, 0x04, 0x00},// '
    {0x00, 0x20, 0x54, 0x54, 0x54, 0x78},// a
    {0x00, 0x7F, 0x48, 0x44, 0x44, 0x38},// b
    {0x00, 0x38, 0x44, 0x44, 0x44, 0x20},// c
    {0x00, 0x38, 0x44, 0x44, 0x48, 0x7F},// d
    {0x00, 0x38, 0x54, 0x54, 0x54, 0x18},// e
    {0x00, 0x08, 0x7E, 0x09, 0x01, 0x02},// f
    {0x00, 0x18, 0xA4, 0xA4, 0xA4, 0x7C},// g
    {0x00, 0x7F, 0x08, 0x04, 0x04, 0x78},// h
    {0x00, 0x00, 0x44, 0x7D, 0x40, 0x00},// i
    {0x00, 0x4