STM32硬件SPI驱动ST7735R TFTLCD Proteus仿真实现

ID:576497 · 发表于 2020-9-23 12:06

最近经理通知要做项目了，让我选型一个LCD开始试着做下。这是我用仿真实现的一个smt32的硬件SPI1来驱动的ST7735R，难度挺小的，因为大部分的代码LCD的厂商已经给我们提供了，我们主要修改成硬件SPI来驱动就好了。

此次仿真上面有2个问题，不知道是代码的问题还是仿真图上的问题。第一个问题是仿真运行时有时会出通信数据传输问题，导致指令越界报警，这个可能是SPI不稳定导致的；第二个问题是在改用SPI2或者SPI3来驱动没有任何反应，猜测是代码时钟没开对或者仿真图上面还要加上具体晶振。

代码工程和仿真工程都已压缩打包，可放心下载。。。

先贴上仿真实现图：

再贴上部分代码：

/**ST7735驱动**/

#include "ST7735.h"

#include "usart.h"

u16 BACK_COLOR, POINT_COLOR; //背景色，画笔色

void WriteCommand_7735(u8 CmdData) //写指令

{

SPI_LCD_CS_LOW; //片选

SPI_LCD_COMMAND_W;//写指令

SPI_I2S_SendData(LCD_SPIx,CmdData);

while (SPI_I2S_GetFlagStatus(LCD_SPIx, SPI_I2S_FLAG_TXE) == RESET){}

SPI_LCD_CS_HIGH;

}

void WriteDate_7735(u8 Data) //写8位数据

{

SPI_LCD_CS_LOW; //片选

SPI_LCD_DATA_W;//写数据

SPI_I2S_SendData(LCD_SPIx,Data);

while(SPI_I2S_GetFlagStatus(LCD_SPIx, SPI_I2S_FLAG_TXE) == RESET){}

SPI_LCD_CS_HIGH;

}

void WriteDate16(int data) //写16位数据

{

WriteDate_7735(data>>8);

WriteDate_7735(data);

}

void LCD_Init(void)

{

LCD_RES_HIGH;

delay_ms(5);

LCD_RES_LOW;

delay_ms(5);

LCD_RES_HIGH;

SPI_LCD_CS_HIGH;

delay_ms(5);

SPI_LCD_CS_LOW; //打开片选使能

WriteCommand_7735(0x11); //Sleep out

delay_ms(120); //Delay 120ms

//------------------------------------ST7735S Frame Rate-----------------------------------------//

WriteCommand_7735(0xB1);

WriteDate_7735(0x05);

WriteCommand_7735(0x11);//Sleep exit

delay_ms (120);

//ST7735R Frame Rate

WriteCommand_7735(0xB1);

WriteDate_7735(0x01);

WriteDate_7735(0x2C); WriteDate_7735(0x2D);

WriteCommand_7735(0xB2);

WriteDate_7735(0x01); WriteDate_7735(0x2C); WriteDate_7735(0x2D);

WriteCommand_7735(0xB3);

WriteDate_7735(0x01); WriteDate_7735(0x2C); WriteDate_7735(0x2D);

WriteCommand_7735(0xB4); //Column inversion

WriteDate_7735(0x07);

//ST7735R Power Sequence

WriteCommand_7735(0xC0);

WriteDate_7735(0xA2); WriteDate_7735(0x02); WriteDate_7735(0x84);

WriteCommand_7735(0xC1); WriteDate_7735(0xC5);

WriteCommand_7735(0xC2);

WriteDate_7735(0x0A); WriteDate_7735(0x00);

WriteCommand_7735(0xC3);

WriteDate_7735(0x8A); WriteDate_7735(0x2A);

WriteCommand_7735(0xC4);

WriteDate_7735(0x8A); WriteDate_7735(0xEE);

WriteCommand_7735(0xC5); //VCOM

WriteDate_7735(0x0E);

WriteCommand_7735(0x36); //MX, MY, RGB mode

WriteDate_7735(0xC8);

//ST7735R Gamma Sequence

WriteCommand_7735(0xe0);

WriteDate_7735(0x0f); WriteDate_7735(0x1a);

WriteDate_7735(0x0f); WriteDate_7735(0x18);

WriteDate_7735(0x2f); WriteDate_7735(0x28);

WriteDate_7735(0x20); WriteDate_7735(0x22);

WriteDate_7735(0x1f); WriteDate_7735(0x1b);

WriteDate_7735(0x23); WriteDate_7735(0x37); WriteDate_7735(0x00);

WriteDate_7735(0x07);

WriteDate_7735(0x02); WriteDate_7735(0x10);

WriteCommand_7735(0xe1);

WriteDate_7735(0x0f); WriteDate_7735(0x1b);

WriteDate_7735(0x0f); WriteDate_7735(0x17);

WriteDate_7735(0x33); WriteDate_7735(0x2c);

WriteDate_7735(0x29); WriteDate_7735(0x2e);

WriteDate_7735(0x30); WriteDate_7735(0x30);

WriteDate_7735(0x39); WriteDate_7735(0x3f);

WriteDate_7735(0x00); WriteDate_7735(0x07);

WriteDate_7735(0x03); WriteDate_7735(0x10);

WriteCommand_7735(0x2a);

WriteDate_7735(0x00);WriteDate_7735(0x00);

WriteDate_7735(0x00);WriteDate_7735(0x7f);

WriteCommand_7735(0x2b);

WriteDate_7735(0x00);WriteDate_7735(0x00);

WriteDate_7735(0x00);WriteDate_7735(0x7f);

/*下面这2个指令对ST7735R好像不起作用，仿真会报警告，应该是没有这2条指令*/

//WriteCommand_7735(0xF0); //Enable test command

//WriteDate_7735(0x01);

//WriteCommand_7735(0xF6); //Disable ram power save mode

//WriteDate_7735(0x00);

WriteCommand_7735(0x3A); //65k mode

WriteDate_7735(0x05);

WriteCommand_7735(0x29); //Display on

WriteCommand_7735(0x2C);

}

代码就贴这么多吧，具体的下载来看吧，网上基于这款LCD的项目挺少的。特别注意点是设置SPI的CS脚，费了我一天时间在那测试，一直没找到错误点，当时都快哭了，终于还是做出来了，希望以后的同学仿真少走弯路吧。CS脚（片选）一定要设定成复用推挽输出，并且不要设置到SPI的NSS脚上，即PA4，接上反正是运行不起来。。。