【STM32】CubeMX+HAL库之 硬件IIC+DMA控制1.3寸OLED
前言
目前网上大多数驱动OLED屏都采用软件IIC，因为HAL库的升级使得硬件IIC的稳定性得到了保障，所以想采用硬件IIC+DMA的方式控制OLED，在最初的时候，换用硬件IIC极其的方便，换到HAL库的接口函数就好了，但打开DMA就炸，仔细想了一下，知道原因 （由于DMA为非阻塞模式，反复调用函数但硬件并未准备好，所以并未执行） 经过拼包DMA发送,CPU的负担大幅降低，显示效果良好。
下文从CubeMX的配置开始说起，并介绍两个DMA发送函数以及相应的发送完成回调函数，最后附上代码实体。（根据中景园历程修改的DMA发送版本）。
所用工具：
- 开发板:STM32G474RE
- STM32CubeMX
- IDE: Keil-MDK
STM32CubeMX IIC配置
- 时钟配置 （如不了解点击下面链接）
【STM32】CubeMX+HAL库之时钟.
2.IIC配置
开启需要的通道，并选择合适的引脚。
由于使用的 STM32G474 IIC有恶魔般的 Fast Mode Plus版本所以选用这个，使得性能拉满。
当然使用其他模式也都可以。其他配置都不需要，默认就好。
3.开启DMA I2Cx_TX 的通道
4.开启相关中断
5.生成代码 点击右上角 GENERATE CODE
HAL库函数
主要的DMA发送函数有两个
HAL_I2C_Mem_Write_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress,uint16_t MemAddSize, uint8_t *pData, uint16_t Size);
HAL_I2C_Master_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData,uint16_t Size);
两函数具有较为明显的区别，就是在HAL_I2C_Mem_Write_DMA函数中有MemAddress 这一参数，MemAddress 代表了传输到目标机的内存地址，而使用 HAL_I2C_Master_Transmit_DMA函数需要在pData的第一位加入目标内存地址。
这两个函数同时有着各自的完成回调函数分别是
HAL_I2C_MemTxCpltCallback
HAL_I2C_MasterTxCpltCallback
因为对OLED操作需要先发送cmd发送坐标位置，在发送数据，这种方式刷新一次屏幕需要发送多次信息，所以为了保证信息都可以被接收，使用完成回调函数，发送下次的数据。
代码示例
解决方案
1.建立两个缓冲Buffer
建立一个缓冲Buffer
uint8_t OLED_GRAMbuf[8][128];
存储整个屏幕需要现实的信息。
再建立cmd地址Buffer
uint8_t OLED_CMDbuf[8][4] ;
存储地址信息。
2.在整屏刷新时开启第一次DMA发送cmd函数，进入完成传输后进入完成回调函数，发送第二次的数据，待发送完成后进入下次的回调函数 ~~~~直至完成所有的传输。
/**
* @brief HAL_I2C_Master_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData,
uint16_t Size)完成回调函数
* 保证DMA传输完成后，开启下次DMA
*/
void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
if(BufFinshFlag)
{
HAL_I2C_Mem_Write_DMA(&hi2c1,0x78,0x40,I2C_MEMADD_SIZE_8BIT,OLED_GRAMbuf[CountFlag],128);
}
}
/**
* @brief HAL_I2C_Mem_Write_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress,
uint16_t MemAddSize, uint8_t *pData, uint16_t Size)完成回调函数
* 保证DMA传输完成后，开启下次DMA
*/
void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
if(CountFlag == 7)
{
BufFinshFlag = 0;
CountFlag = 0;
}
if(BufFinshFlag)
{
CountFlag ++;
HAL_I2C_Master_Transmit_DMA(&hi2c1,0x78,OLED_CMDbuf[CountFlag],4);
}
}
/**
* @brief 发送数据到OLED的GRAM
* @param[in] none
* @retval none
*/
void OLED_refresh_gram(void)
{
uint8_t i;
uint16_t j;
if(BufFinshFlag == 0)
{
for(i = 0; i < 8; i ++ )
{
OLED_set_pos(0, i);
for(j = 0;j < 128; j ++)
{
OLED_GRAMbuf[i][j] = OLED_GRAM[j][i]; //OLED_GRAM[128][8]
}
}
BufFinshFlag = 1;
HAL_I2C_Master_Transmit_DMA(&hi2c1,0x78,OLED_CMDbuf[0],4);
}
}
详细看下面的整文件分享
代码部分
main.c
OLED_operate_gram(PEN_CLEAR);//清缓存
OLED_show_string(0,5,(uint8_t*)"show string");
OLED_show_floatnum(2, 12, num, 0);
OLED_refresh_gram();//全局刷新
oled.c
#include "OLED.h"
#include "oledfont.h"
#include "main.h"
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
extern I2C_HandleTypeDef hi2c1;
uint8_t OLED_GRAM[128][8];
uint8_t OLED_GRAMbuf[8][128];
uint8_t OLED_CMDbuf[8][4] = {0};
uint8_t I2C1_MemTxFinshFlag = 1;
uint8_t CountFlag = 0;
uint8_t BufFinshFlag = 0;
/**
* @brief HAL_I2C_Master_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData,
uint16_t Size)完成回调函数
* 保证DMA传输完成后，开启下次DMA
*/
void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
if(BufFinshFlag)
{
HAL_I2C_Mem_Write_DMA(&hi2c1,0x78,0x40,I2C_MEMADD_SIZE_8BIT,OLED_GRAMbuf[CountFlag],128);
}
}
/**
* @brief HAL_I2C_Mem_Write_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress,
uint16_t MemAddSize, uint8_t *pData, uint16_t Size)完成回调函数
* 保证DMA传输完成后，开启下次DMA
*/
void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c)
{
if(CountFlag == 7)
{
BufFinshFlag = 0;
CountFlag = 0;
}
if(BufFinshFlag)
{
CountFlag ++;
HAL_I2C_Master_Transmit_DMA(&hi2c1,0x78,OLED_CMDbuf[CountFlag],4);
}
}
uint32_t oled_pow(uint8_t m, uint8_t n)
{
uint32_t result = 1;
while (n--)
result *= m;
return result;
}
uint8_t check_num_len(uint32_t num)
{
uint32_t tmp;
uint8_t i;
for(i = 1; i < 10; i++)
{
tmp = oled_pow(10, i);
if(num < tmp)
{
return i;
}
}
return 0;
}
void OLED_show_num(uint8_t x, uint8_t y, uint32_t num, uint8_t mode, uint8_t len)
{
uint8_t t, temp;
uint8_t enshow = 0;
for (t = 0; t < len; t++)
{
temp = (num / oled_pow(10, len - t - 1)) % 10;
if (enshow == 0 && t < (len - 1))
{
if (temp == 0)
{
if (mode == 0)
OLED_show_char(x, y + t, ' ');
else
OLED_show_char(x, y + t, '0');
continue;
}
else
enshow = 1;
}
OLED_show_char(x, y + t, temp + '0');
}
}
void OLED_show_floatnum(uint8_t x, uint8_t y, float num, uint8_t mode)
{
int32_t m, n;
float R;
uint8_t chartemp[6], i;
R = num;
m = R / 1;
n = (R - m) * 1000;
if(n < 0) n = -n;
i = check_num_len(m);
OLED_show_num(x, y, m, mode, i);
chartemp[0] = '.';
chartemp[1] = n / 100 + 48;
chartemp[2] = n / 10 % 10 + 48;
chartemp[3] = n % 10 + 48;
chartemp[4] = ' ';
chartemp[5] = '\0';
OLED_show_string(x, y + i, chartemp);
}
/**
* @brief initialize the oled device
* @param[in] none
* @retval none
*/
/**
* @brief 初始化OLED模块，
* @param[in] none
* @retval none
*/
uint8_t OLED_Init_CMD[ ] =
{
0xAE, 0x00, 0x10, 0x40, 0xB0, 0x81, 0xFF, 0xA1, 0xA6, 0xA8,
0x3F, 0xC8, 0xD3, 0x00, 0xD5, 0x80, 0xD8, 0x05, 0xD9, 0xF1,
0xDA, 0x12, 0xDB, 0x30, 0x8D, 0x14, 0xAF, 0x20, 0x00
};
void OLED_init(void)
{
HAL_I2C_Mem_Write_DMA(&hi2c1, OLED_I2C_ADDRESS, 0x00, I2C_MEMADD_SIZE_8BIT, OLED_Init_CMD, 29);
}
/**
* @brief operate the graphic ram(size: 128*8 char)
* @param[in] pen: the type of operate.
PEN_CLEAR: set ram to 0x00
PEN_WRITE: set ram to 0xff
PEN_INVERSION: bit inversion
* @retval none
*/
/**
* @brief 操作GRAM内存(128*8char数组)
* @param[in] pen: 操作类型.
PEN_CLEAR: 设置为0x00
PEN_WRITE: 设置为0xff
* @retval none
*/
void OLED_operate_gram(pen_typedef pen)
{
if (pen == PEN_WRITE)
{
memset(OLED_GRAM,0xff,sizeof(OLED_GRAM));
}
else if(pen == PEN_CLEAR)
{
memset(OLED_GRAM,0x00,sizeof(OLED_GRAM));
}
}
/**
* @brief cursor set to (x,y) point
* @param[in] x:X-axis, from 0 to 127
* @param[in] y:Y-axis, from 0 to 7
* @retval none
*/
/**
* @brief 设置光标起点(x,y)
* @param[in] x:x轴, 从 0 到 127
* @param[in] y:y轴, 从 0 到 7
* @retval none
*/
void OLED_set_pos(uint8_t x, uint8_t y)
{
OLED_CMDbuf[y][0] = 0x00;
OLED_CMDbuf[y][1] = 0xb0 + y;
OLED_CMDbuf[y][2] = 0x10;
OLED_CMDbuf[y][3] = 0x00;
}
/**
* @brief draw one bit of graphic raw, operate one point of screan(128*64)
* @param[in] x: x-axis, [0, X_WIDTH-1]
* @param[in] y: y-axis, [0, Y_WIDTH-1]
* @param[in] pen: type of operation,
PEN_CLEAR: set (x,y) to 0
PEN_WRITE: set (x,y) to 1
PEN_INVERSION: (x,y) value inversion
* @retval none
*/
/**
* @brief 操作GRAM中的一个位，相当于操作屏幕的一个点
* @param[in] x:x轴, [0,X_WIDTH-1]
* @param[in] y:y轴, [0,Y_WIDTH-1]
* @param[in] pen: 操作类型,
PEN_CLEAR: 设置 (x,y) 点为 0
PEN_WRITE: 设置 (x,y) 点为 1
PEN_INVERSION: (x,y) 值反转
* @retval none
*/
void OLED_draw_point(int8_t x, int8_t y, pen_typedef pen)
{
uint8_t page = 0, row = 0;
/* check the corrdinate */
if ((x < 0) || (x > (X_WIDTH - 1)) || (y < 0) || (y > (Y_WIDTH - 1)))
{
return;
}
page = y / 8;
row = y % 8;
if (pen == PEN_WRITE)
{
OLED_GRAM[x][page] |= 1 << row;
}
else if (pen == PEN_INVERSION)
{
OLED_GRAM[x][page] ^= 1 << row;
}
else
{
OLED_GRAM[x][page] &= ~(1 << row);
}
}
/**
* @brief draw a line from (x1, y1) to (x2, y2)
* @param[in] x1: the start point of line
* @param[in] y1: the start point of line
* @param[in] x2: the end point of line
* @param[in] y2: the end point of line
* @param[in] pen: type of operation,PEN_CLEAR,PEN_WRITE,PEN_INVERSION.
* @retval none
*/
/**
* @brief 画一条直线，从(x1,y1)到(x2,y2)
* @param[in] x1: 起点
* @param[in] y1: 起点
* @param[in] x2: 终点
* @param[in] y2: 终点
* @param[in] pen: 操作类型,PEN_CLEAR,PEN_WRITE,PEN_INVERSION.
* @retval none
*/
void OLED_draw_line(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, pen_typedef pen)
{
uint8_t col = 0, row = 0;
uint8_t x_st = 0, x_ed = 0, y_st = 0, y_ed = 0;
float k = 0.0f, b = 0.0f;
if (y1 == y2)
{
(x1 <= x2) ? (x_st = x1):(x_st = x2);
(x1 <= x2) ? (x_ed = x2):(x_ed = x1);
for (col = x_st; col <= x_ed; col++)
{
OLED_draw_point(col, y1, pen);
}
}
else if (x1 == x2)
{
(y1 <= y2) ? (y_st = y1):(y_st = y2);
(y1 <= y2) ? (y_ed = y2):(y_ed = y1);
for (row = y_st; row <= y_ed; row++)
{
OLED_draw_point(x1, row, pen);
}
}
else
{
k = ((float)(y2 - y1)) / (x2 - x1);
b = (float)y1 - k * x1;
(x1 <= x2) ? (x_st = x1):(x_st = x2);
(x1 <= x2) ? (x_ed = x2):(x_ed = x2);
for (col = x_st; col <= x_ed; col++)
{
OLED_draw_point(col, (uint8_t)(col * k + b), pen);
}
}
}
/**
* @brief show a character
* @param[in] row: start row of character
* @param[in] col: start column of character
* @param[in] chr: the character ready to show
* @retval none
*/
/**
* @brief 显示一个字符
* @param[in] row: 字符的开始行
* @param[in] col: 字符的开始列
* @param[in] chr: 字符
* @retval none
*/
void OLED_show_char(uint8_t row, uint8_t col, uint8_t chr)
{
uint8_t x = col * 6;
uint8_t y = row * 12;
uint8_t temp, t, t1;
uint8_t y0 = y;
chr = chr - ' ';
for (t = 0; t < 12; t++)
{
temp = asc2_1206[chr][t];
for (t1 = 0; t1 < 8; t1++)
{
if (temp&0x80)
OLED_draw_point(x, y, PEN_WRITE);
else
OLED_draw_point(x, y, PEN_CLEAR);
temp <<= 1;
y++;
if ((y - y0) == 12)
{
y = y0;
x++;
break;
}
}
}
}
/**
* @brief show a character string
* @param[in] row: row of character string begin
* @param[in] col: column of character string begin
* @param[in] chr: the pointer to character string
* @retval none
*/
/**
* @brief 显示一个字符串
* @param[in] row: 字符串的开始行
* @param[in] col: 字符串的开始列
* @param[in] chr: 字符串
* @retval none
*/
void OLED_show_string(uint8_t row, uint8_t col, uint8_t *chr)
{
uint8_t n =0;
while (chr[n] != '\0')
{
OLED_show_char(row, col, chr[n]);
col++;
if (col > 20)
{
col = 0;
row += 1;
}
n++;
}
}
/**
* @brief formatted output in oled 128*64
* @param[in] row: row of character string begin, 0 <= row <= 4;
* @param[in] col: column of character string begin, 0 <= col <= 20;
* @param *fmt: the pointer to format character string
* @note if the character length is more than one row at a time, the extra characters will be truncated
* @retval none
*/
/**
* @brief 格式输出
* @param[in] row: 开始列，0 <= row <= 4;
* @param[in] col: 开始行， 0 <= col <= 20;
* @param[in] *fmt:格式化输出字符串
* @note 如果字符串长度大于一行，额外的字符会换行
* @retval none
*/
void OLED_printf(uint8_t row, uint8_t col, const char *fmt,...)
{
static uint8_t LCD_BUF[128] = {0};
static va_list ap;
uint8_t remain_size = 0;
if ((row > 4) || (col > 20) )
{
return;
}
va_start(ap, fmt);
vsprintf((char *)LCD_BUF, fmt, ap);
va_end(ap);
remain_size = 21 - col;
LCD_BUF[remain_size] = '\0';
OLED_show_string(row, col, LCD_BUF);
}
/**
* @brief send the data of gram to oled sreen
* @param[in] none
* @retval none
*/
/**
* @brief 发送数据到OLED的GRAM
* @param[in] none
* @retval none
*/
void OLED_refresh_gram(void)
{
uint8_t i;
uint16_t j;
if(BufFinshFlag == 0)
{
for(i = 0; i < 8; i ++ )
{
OLED_set_pos(0, i);
for(j = 0;j < 128; j ++)
{
OLED_GRAMbuf[i][j] = OLED_GRAM[j][i]; //OLED_GRAM[128][8]
}
}
BufFinshFlag = 1;
HAL_I2C_Master_Transmit_DMA(&hi2c1,0x78,OLED_CMDbuf[0],4);
}
}
/**
* @brief show the logo of RoboMaster
* @param[in] none
* @retval none
*/
/**
* @brief 显示RM的LOGO
* @param[in] none
* @retval none
*/
void OLED_LOGO(void)
{
uint8_t temp_char = 0;
uint8_t x = 0, y = 0;
uint8_t i = 0;
OLED_operate_gram(PEN_CLEAR);
for(; y < 64; y += 8)
{
for(x = 0; x < 128; x++)
{
temp_char = LOGO_BMP[x][y/8];
for(i = 0; i < 8; i++)
{
if(temp_char & 0x80)
{
OLED_draw_point(x, y + i,PEN_WRITE);
}
else
{
OLED_draw_point(x,y + i,PEN_CLEAR);
}
temp_char <<= 1;
}
}
}
OLED_refresh_gram();
}
oled.h
#ifndef OLED_H
#define OLED_H
//#include "struct_typedef.h"
#include <stdint.h>
// the I2C address of oled
#define OLED_I2C_ADDRESS 0x78
//the resolution of oled 128*64
#define MAX_COLUMN 128
#define MAX_ROW 64
#define X_WIDTH MAX_COLUMN
#define Y_WIDTH MAX_ROW
#define OLED_CMD 0x00
#define OLED_DATA 0x01
#define CHAR_SIZE_WIDTH 6
#define CHAR_SIZE_HIGHT 12
typedef enum
{
PEN_CLEAR = 0x00,
PEN_WRITE = 0x01,
PEN_INVERSION= 0x02,
}pen_typedef;
/**
* @brief initialize the oled device
* @param[in] none
* @retval none
*/
/**
* @brief 初始化OLED模块，
* @param[in] none
* @retval none
*/
extern void OLED_init(void);
uint32_t oled_pow(uint8_t m, uint8_t n);
uint8_t check_num_len(uint32_t num);
void OLED_show_num(uint8_t x, uint8_t y, uint32_t num, uint8_t mode, uint8_t len);
void OLED_show_floatnum(uint8_t x, uint8_t y, float num, uint8_t mode);
/**
* @brief turn on OLED display
* @param[in] none
* @retval none
*/
/**
* @brief 打开OLED显示
* @param[in] none
* @retval none
*/
extern void OLED_display_on(void);
/**
* @brief turn off OLED display
* @param[in] none
* @retval none
*/
/**
* @brief 关闭OLED显示
* @param[in] none
* @retval none
*/
extern void OLED_display_off(void);
/**
* @brief operate the graphic ram(size: 128*8 char)
* @param[in] pen: the type of operate.
PEN_CLEAR: set ram to 0x00
PEN_WRITE: set ram to 0xff
PEN_INVERSION: bit inversion
* @retval none
*/
/**
* @brief 操作GRAM内存(128*8char数组)
* @param[in] pen: 操作类型.
PEN_CLEAR: 设置为0x00
PEN_WRITE: 设置为0xff
PEN_INVERSION: 按位取反
* @retval none
*/
extern void OLED_operate_gram(pen_typedef pen);
/**
* @brief cursor set to (x,y) point
* @param[in] x:X-axis, from 0 to 127
* @param[in] y:Y-axis, from 0 to 7
* @retval none
*/
/**
* @brief 设置光标起点(x,y)
* @param[in] x:x轴, 从 0 到 127
* @param[in] y:y轴, 从 0 到 7
* @retval none
*/
extern void OLED_set_pos(uint8_t x, uint8_t y);
/**
* @brief draw one bit of graphic raw, operate one point of screan(128*64)
* @param[in] x: x-axis, [0, X_WIDTH-1]
* @param[in] y: y-axis, [0, Y_WIDTH-1]
* @param[in] pen: type of operation,
PEN_CLEAR: set (x,y) to 0
PEN_WRITE: set (x,y) to 1
PEN_INVERSION: (x,y) value inversion
* @retval none
*/
/**
* @brief 操作GRAM中的一个位，相当于操作屏幕的一个点
* @param[in] x:x轴, [0,X_WIDTH-1]
* @param[in] y:y轴, [0,Y_WIDTH-1]
* @param[in] pen: 操作类型,
PEN_CLEAR: 设置 (x,y) 点为 0
PEN_WRITE: 设置 (x,y) 点为 1
PEN_INVERSION: (x,y) 值反转
* @retval none
*/
extern void OLED_draw_point(int8_t x, int8_t y, pen_typedef pen);
/**
* @brief draw a line from (x1, y1) to (x2, y2)
* @param[in] x1: the start point of line
* @param[in] y1: the start point of line
* @param[in] x2: the end point of line
* @param[in] y2: the end point of line
* @param[in] pen: type of operation,PEN_CLEAR,PEN_WRITE,PEN_INVERSION.
* @retval none
*/
/**
* @brief 画一条直线，从(x1,y1)到(x2,y2)
* @param[in] x1: 起点
* @param[in] y1: 起点
* @param[in] x2: 终点
* @param[in] y2: 终点
* @param[in] pen: 操作类型,PEN_CLEAR,PEN_WRITE,PEN_INVERSION.
* @retval none
*/
extern void OLED_draw_line(uint8_t x1, uint8_t y1, uint8_t x2, uint8_t y2, pen_typedef pen);
/**
* @brief show a character
* @param[in] row: start row of character
* @param[in] col: start column of character
* @param[in] chr: the character ready to show
* @retval none
*/
/**
* @brief 显示一个字符
* @param[in] row: 字符的开始行
* @param[in] col: 字符的开始列
* @param[in] chr: 字符
* @retval none
*/
extern void OLED_show_char(uint8_t row, uint8_t col, uint8_t chr);
/**
* @brief show a character string
* @param[in] row: row of character string begin
* @param[in] col: column of character string begin
* @param[in] chr: the pointer to character string
* @retval none
*/
/**
* @brief 显示一个字符串
* @param[in] row: 字符串的开始行
* @param[in] col: 字符串的开始列
* @param[in] chr: 字符串
* @retval none
*/
extern void OLED_show_string(uint8_t row, uint8_t col, uint8_t *chr);
/**
* @brief formatted output in oled 128*64
* @param[in] row: row of character string begin, 0 <= row <= 4;
* @param[in] col: column of character string begin, 0 <= col <= 20;
* @param *fmt: the pointer to format character string
* @note if the character length is more than one row at a time, the extra characters will be truncated
* @retval none
*/
/**
* @brief 格式输出
* @param[in] row: 开始列，0 <= row <= 4;
* @param[in] col: 开始行， 0 <= col <= 20;
* @param[in] *fmt:格式化输出字符串
* @note 如果字符串长度大于一行，额外的字符会换行
* @retval none
*/
extern void OLED_printf(uint8_t row, uint8_t col, const char *fmt,...);
/**
* @brief send the data of gram to oled sreen
* @param[in] none
* @retval none
*/
/**
* @brief 发送数据到OLED的GRAM
* @param[in] none
* @retval none
*/
extern void OLED_refresh_gram(void);
#endif
oledfont.h
/**
***************************************(C) COPYRIGHT 2019 DJI***************************************
* @file oledfont.h
* @brief character lib of oled
* @note
* @Version V1.0.0
* @Date Oct-7-2019
***************************************(C) COPYRIGHT 2019 DJI***************************************
*/
#ifndef __OLED__FONT__H
#define __OLED__FONT__H
//the common ascii character
const unsigned char asc2_1206[95][12]={
{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*" ",0*/
{0x00,0x00,0x00,0x00,0x3F,0x40,0x00,0x00,0x00,0x00,0x00,0x00},/*"!",1*/
{0x00,0x00,0x30,0x00,0x40,0x00,0x30,0x00,0x40,0x00,0x00,0x00},/*""",2*/
{0x09,0x00,0x0B,0xC0,0x3D,0x00,0x0B,0xC0,0x3D,0x00,0x09,0x00},/*"#",3*/
{0x18,0xC0,0x24,0x40,0x7F,0xE0,0x22,0x40,0x31,0x80,0x00,0x00},/*"$",4*/
{0x18,0x00,0x24,0xC0,0x1B,0x00,0x0D,0x80,0x32,0x40,0x01,0x80},/*"%",5*/
{0x03,0x80,0x1C,0x40,0x27,0x40,0x1C,0x80,0x07,0x40,0x00,0x40},/*"&",6*/
{0x10,0x00,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*"'",7*/
{0x00,0x00,0x00,0x00,0x00,0x00,0x1F,0x80,0x20,0x40,0x40,0x20},/*"(",8*/
{0x00,0x00,0x40,0x20,0x20,0x40,0x1F,0x80,0x00,0x00,0x00,0x00},/*")",9*/
{0x09,0x00,0x06,0x00,0x1F,0x80,0x06,0x00,0x09,0x00,0x00,0x00},/*"*",10*/
{0x04,0x00,0x04,0x00,0x3F,0x80,0x04,0x00,0x04,0x00,0x00,0x00},/*"+",11*/
{0x00,0x10,0x00,0x60,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*",",12*/
{0x04,0x00,0x04,0x00,0x04,0x00,0x04,0x00,0x04,0x00,0x00,0x00},/*"-",13*/
{0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*".",14*/
{0x00,0x20,0x01,0xC0,0x06,0x00,0x38,0x00,0x40,0x00,0x00,0x00},/*"/",15*/
{0x1F,0x80,0x20,0x40,0x20,0x40,0x20,0x40,0x1F,0x80,0x00,0x00},/*"0",16*/
{0x00,0x00,0x10,0x40,0x3F,0xC0,0x00,0x40,0x00,0x00,0x00,0x00},/*"1",17*/
{0x18,0xC0,0x21,0x40,0x22,0x40,0x24,0x40,0x18,0x40,0x00,0x00},/*"2",18*/
{0x10,0x80,0x20,0x40,0x24,0x40,0x24,0x40,0x1B,0x80,0x00,0x00},/*"3",19*/
{0x02,0x00,0x0D,0x00,0x11,0x00,0x3F,0xC0,0x01,0x40,0x00,0x00},/*"4",20*/
{0x3C,0x80,0x24,0x40,0x24,0x40,0x24,0x40,0x23,0x80,0x00,0x00},/*"5",21*/
{0x1F,0x80,0x24,0x40,0x24,0x40,0x34,0x40,0x03,0x80,0x00,0x00},/*"6",22*/
{0x30,0x00,0x20,0x00,0x27,0xC0,0x38,0x00,0x20,0x00,0x00,0x00},/*"7",23*/
{0x1B,0x80,0x24,0x40,0x24,0x40,0x24,0x40,0x1B,0x80,0x00,0x00},/*"8",24*/
{0x1C,0x00,0x22,0xC0,0x22,0x40,0x22,0x40,0x1F,0x80,0x00,0x00},/*"9",25*/
{0x00,0x00,0x00,0x00,0x08,0x40,0x00,0x00,0x00,0x00,0x00,0x00},/*":",26*/
{0x00,0x00,0x00,0x00,0x04,0x60,0x00,0x00,0x00,0x00,0x00,0x00},/*";",27*/
{0x00,0x00,0x04,0x00,0x0A,0x00,0x11,0x00,0x20,0x80,0x40,0x40},/*"<",28*/
{0x09,0x00,0x09,0x00,0x09,0x00,0x09,0x00,0x09,0x00,0x00,0x00},/*"=",29*/
{0x00,0x00,0x40,0x40,0x20,0x80,0x11,0x00,0x0A,0x00,0x04,0x00},/*">",30*/
{0x18,0x00,0x20,0x00,0x23,0x40,0x24,0x00,0x18,0x00,0x00,0x00},/*"?",31*/
{0x1F,0x80,0x20,0x40,0x27,0x40,0x29,0x40,0x1F,0x40,0x00,0x00},/*"@",32*/
{0x00,0x40,0x07,0xC0,0x39,0x00,0x0F,0x00,0x01,0xC0,0x00,0x40},/*"A",33*/
{0x20,0x40,0x3F,0xC0,0x24,0x40,0x24,0x40,0x1B,0x80,0x00,0x00},/*"B",34*/
{0x1F,0x80,0x20,0x40,0x20,0x40,0x20,0x40,0x30,0x80,0x00,0x00},/*"C",35*/
{0x20,0x40,0x3F,0xC0,0x20,0x40,0x20,0x40,0x1F,0x80,0x00,0x00},/*"D",36*/
{0x20,0x40,0x3F,0xC0,0x24,0x40,0x2E,0x40,0x30,0xC0,0x00,0x00},/*"E",37*/
{0x20,0x40,0x3F,0xC0,0x24,0x40,0x2E,0x00,0x30,0x00,0x00,0x00},/*"F",38*/
{0x0F,0x00,0x10,0x80,0x20,0x40,0x22,0x40,0x33,0x80,0x02,0x00},/*"G",39*/
{0x20,0x40,0x3F,0xC0,0x04,0x00,0x04,0x00,0x3F,0xC0,0x20,0x40},/*"H",40*/
{0x20,0x40,0x20,0x40,0x3F,0xC0,0x20,0x40,0x20,0x40,0x00,0x00},/*"I",41*/
{0x00,0x60,0x20,0x20,0x20,0x20,0x3F,0xC0,0x20,0x00,0x20,0x00},/*"J",42*/
{0x20,0x40,0x3F,0xC0,0x24,0x40,0x0B,0x00,0x30,0xC0,0x20,0x40},/*"K",43*/
{0x20,0x40,0x3F,0xC0,0x20,0x40,0x00,0x40,0x00,0x40,0x00,0xC0},/*"L",44*/
{0x3F,0xC0,0x3C,0x00,0x03,0xC0,0x3C,0x00,0x3F,0xC0,0x00,0x00},/*"M",45*/
{0x20,0x40,0x3F,0xC0,0x0C,0x40,0x23,0x00,0x3F,0xC0,0x20,0x00},/*"N",46*/
{0x1F,0x80,0x20,0x40,0x20,0x40,0x20,0x40,0x1F,0x80,0x00,0x00},/*"O",47*/
{0x20,0x40,0x3F,0xC0,0x24,0x40,0x24,0x00,0x18,0x00,0x00,0x00},/*"P",48*/
{0x1F,0x80,0x21,0x40,0x21,0x40,0x20,0xE0,0x1F,0xA0,0x00,0x00},/*"Q",49*/
{0x20,0x40,0x3F,0xC0,0x24,0x40,0x26,0x00,0x19,0xC0,0x00,0x40},/*"R",50*/
{0x18,0xC0,0x24,0x40,0x24,0x40,0x22,0x40,0x31,0x80,0x00,0x00},/*"S",51*/
{0x30,0x00,0x20,0x40,0x3F,0xC0,0x20,0x40,0x30,0x00,0x00,0x00},/*"T",52*/
{0x20,0x00,0x3F,0x80,0x00,0x40,0x00,0x40,0x3F,0x80,0x20,0x00},/*"U",53*/
{0x20,0x00,0x3E,0x00,0x01,0xC0,0x07,0x00,0x38,0x00,0x20,0x00},/*"V",54*/
{0x38,0x00,0x07,0xC0,0x3C,0x00,0x07,0xC0,0x38,0x00,0x00,0x00},/*"W",55*/
{0x20,0x40,0x39,0xC0,0x06,0x00,0x39,0xC0,0x20,0x40,0x00,0x00},/*"X",56*/
{0x20,0x00,0x38,0x40,0x07,0xC0,0x38,0x40,0x20,0x00,0x00,0x00},/*"Y",57*/
{0x30,0x40,0x21,0xC0,0x26,0x40,0x38,0x40,0x20,0xC0,0x00,0x00},/*"Z",58*/
{0x00,0x00,0x00,0x00,0x7F,0xE0,0x40,0x20,0x40,0x20,0x00,0x00},/*"[",59*/
{0x00,0x00,0x70,0x00,0x0C,0x00,0x03,0x80,0x00,0x40,0x00,0x00},/*"\",60*/
{0x00,0x00,0x40,0x20,0x40,0x20,0x7F,0xE0,0x00,0x00,0x00,0x00},/*"]",61*/
{0x00,0x00,0x20,0x00,0x40,0x00,0x20,0x00,0x00,0x00,0x00,0x00},/*"^",62*/
{0x00,0x10,0x00,0x10,0x00,0x10,0x00,0x10,0x00,0x10,0x00,0x10},/*"_",63*/
{0x00,0x00,0x00,0x00,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00},/*"`",64*/
{0x00,0x00,0x02,0x80,0x05,0x40,0x05,0x40,0x03,0xC0,0x00,0x40},/*"a",65*/
{0x20,0x00,0x3F,0xC0,0x04,0x40,0x04,0x40,0x03,0x80,0x00,0x00},/*"b",66*/
{0x00,0x00,0x03,0x80,0x04,0x40,0x04,0x40,0x06,0x40,0x00,0x00},/*"c",67*/
{0x00,0x00,0x03,0x80,0x04,0x40,0x24,0x40,0x3F,0xC0,0x00,0x40},/*"d",68*/
{0x00,0x00,0x03,0x80,0x05,0x40,0x05,0x40,0x03,0x40,0x00,0x00},/*"e",69*/
{0x00,0x00,0x04,0x40,0x1F,0xC0,0x24,0x40,0x24,0x40,0x20,0x00},/*"f",70*/
{0x00,0x00,0x02,0xE0,0x05,0x50,0x05,0x50,0x06,0x50,0x04,0x20},/*"g",71*/
{0x20,0x40,0x3F,0xC0,0x04,0x40,0x04,0x00,0x03,0xC0,0x00,0x40},/*"h",72*/
{0x00,0x00,0x04,0x40,0x27,0xC0,0x00,0x40,0x00,0x00,0x00,0x00},/*"i",73*/
{0x00,0x10,0x00,0x10,0x04,0x10,0x27,0xE0,0x00,0x00,0x00,0x00},/*"j",74*/
{0x20,0x40,0x3F,0xC0,0x01,0x40,0x07,0x00,0x04,0xC0,0x04,0x40},/*"k",75*/
{0x20,0x40,0x20,0x40,0x3F,0xC0,0x00,0x40,0x00,0x40,0x00,0x00},/*"l",76*/
{0x07,0xC0,0x04,0x00,0x07,0xC0,0x04,0x00,0x03,0xC0,0x00,0x00},/*"m",77*/
{0x04,0x40,0x07,0xC0,0x04,0x40,0x04,0x00,0x03,0xC0,0x00,0x40},/*"n",78*/
{0x00,0x00,0x03,0x80,0x04,0x40,0x04,0x40,0x03,0x80,0x00,0x00},/*"o",79*/
{0x04,0x10,0x07,0xF0,0x04,0x50,0x04,0x40,0x03,0x80,0x00,0x00},/*"p",80*/
{0x00,0x00,0x03,0x80,0x04,0x40,0x04,0x50,0x07,0xF0,0x00,0x10},/*"q",81*/
{0x04,0x40,0x07,0xC0,0x02,0x40,0x04,0x00,0x04,0x00,0x00,0x00},/*"r",82*/
{0x00,0x00,0x06,0x40,0x05,0x40,0x05,0x40,0x04,0xC0,0x00,0x00},/*"s",83*/
{0x00,0x00,0x04,0x00,0x1F,0x80,0x04,0x40,0x00,0x40,0x00,0x00},/*"t",84*/
{0x04,0x00,0x07,0x80,0x00,0x40,0x04,0x40,0x07,0xC0,0x00,0x40},/*"u",85*/
{0x04,0x00,0x07,0x00,0x04,0xC0,0x01,0x80,0x06,0x00,0x04,0x00},/*"v",86*/
{0x06,0x00,0x01,0xC0,0x07,0x00,0x01,0xC0,0x06,0x00,0x00,0x00},/*"w",87*/
{0x04,0x40,0x06,0xC0,0x01,0x00,0x06,0xC0,0x04,0x40,0x00,0x00},/*"x",88*/
{0x04,0x10,0x07,0x10,0x04,0xE0,0x01,0x80,0x06,0x00,0x04,0x00},/*"y",89*/
{0x00,0x00,0x04,0x40,0x05,0xC0,0x06,0x40,0x04,0x40,0x00,0x00},/*"z",90*/
{0x00,0x00,0x00,0x00,0x04,0x00,0x7B,0xE0,0x40,0x20,0x00,0x00},/*"{",91*/
{0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xF0,0x00,0x00,0x00,0x00},/*"|",92*/
{0x00,0x00,0x40,0x20,0x7B,0xE0,0x04,0x00,0x00,0x00,0x00,0x00},/*"}",93*/
{0x40,0x00,0x80,0x00,0x40,0x00,0x20,0x00,0x20,0x00,0x40,0x00},/*"~",94*/
};
#endif
总结
最初看到一篇文章说在初始化时加上0x20和 0x00两个指令即可实现将SSD1306的寻址方式修改为了水平寻址，能够一次性对OLED内部Graphic Display Data RAM (GDDRAM)整体更新。这样既可实现刷新一次屏幕发送一次数据。但由于我是用的1.3寸屏幕驱动为SH1106，在测试时发现并不支持此操作，退而求其次我写了这种发送次数多，但万能的方法。
版权声明：本文为CSDN博主「A.大畅哥」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/weixin_45065888/article/details/118225993
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