用STM32評(píng)估板與迪文屏做交互，也沒那么難! 沒幾行C代碼就可以實(shí)現(xiàn)一些簡(jiǎn)單的功能。跟大家分享下，詳細(xì)視頻和說明請(qǐng)參照http://bbs.elecfans.com/forum.php?mod=viewthread&tid=1626837&extra=

一、評(píng)估板使用說明

1、功能

注：可實(shí)現(xiàn)的功能：

a．通過屏上的圖標(biāo)來控制5路LED燈的狀態(tài)（LED燈的開和關(guān)來表示狀態(tài)），上電5路LED熄滅狀態(tài)。

b. 通過評(píng)估板上的物理按鍵1，來控制亮屏和息屏，上電狀態(tài)為亮屏狀態(tài)。

c. 通過評(píng)估板上的物理按鍵2&3，來調(diào)節(jié)屏幕上的溫度指數(shù)，上電初始值????? ????25度，以1為步長(zhǎng)遞增遞減，最小0，最大255。

d. 通過評(píng)估板上的物理按鍵4，來控制音樂的播放和停止，上電音樂不播放。

e. 通過評(píng)估板上的物理按鍵5&6來調(diào)節(jié)音量的大小，上電音量值50，以10為步長(zhǎng)遞增遞減，最小0，最大250。

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2、需使用的工具

a．硬件：正點(diǎn)原子Mini STM32開發(fā)板（MCU為STM32F103RCT6，串口TTL電平）+面包板手工焊接5路LED和6路按鍵擴(kuò)展。

b. 軟件：STM32CubeMX+KEIL MDK5。

c．原理圖：詳見“硬件原理圖”文件夾。

d．程序：工程文件在DGUS II工程文件夾中，下載DWIN_SET導(dǎo)入屏中即可。 STM32程序在“MCU_STM32F103RCT6程序”文件夾。

二、硬件及軟件介紹

1、硬件原理圖：詳見“硬件原理圖”文件夾

（1）硬件接口定義：

（2）硬件原理圖：

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?

圖1：STM32F103原理圖

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圖2：LED及KEY原理圖

2、軟件程序

界面工程文件在“DGUS_II工程”文件夾中。STM32程序在“MCU_STM32F103RCT6程序”文件夾中。

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（1）界面工程

LED1圖標(biāo)：0X1000

LED1按鍵：0X1200

LED2圖標(biāo)：0X1001

LED2按鍵：0X1201

LED3圖標(biāo)：0X1002

LED3按鍵：0X1202

LED4圖標(biāo)：0X1003

LED4按鍵：0X1203

LED5圖標(biāo)：0X1004

LED5按鍵：0X1204

音量顯示框地址：0X1210

溫度顯示框地址：0X1110

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（2）MCU程序

1）.main():硬件初始化，觸摸屏初始化，按鍵掃描，接收觸摸屏數(shù)據(jù)處理

int main(void)

{

uint8_t i;

HAL_Init();

? SystemClock_Config();

? MX_GPIO_Init();

? MX_USART1_UART_Init();

? while (1)

? {?????

???????? HAL_UART_Receive_IT(&huart1,&usart1_data,1);

???????? if(UP_POWER_FLAG == 0)//上電初始化觸摸屏

???????? {

????????????? UP_POWER_FLAG = 1;

????????????? HMI_SEND_BUF[0] = TEMP;

????????????? PLC_Data_Wr2HMI(0X1110,0,1);

????????????? delay_ms(100);

????????????? HMI_SEND_BUF[0] = VOLUME;

????????????? PLC_Data_Wr2HMI(0X1210,0,1);//ò?á???ê?

???????? ???? delay_ms(100);

????????????? WRITE_HMI(0X00A1,VOLUME,0x00,0,0,2);//??è?ò?á?50

????????????? delay_ms(100);

????????????? for(i=0;i<5;i++)

????????????? {

?????????????????? HMI_SEND_BUF[i] = 0;

????????????? }

????????????? for(i=0;i<20;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? HMI_HANDLEFLAG = 0;

???????? }

???????? if(PLAY ==1)//監(jiān)測(cè)是否播放完音樂

???????? {

????????????? READ_HMI(0x00a1,1);

????????????? delay_ms(100);

????????????? if(HMI_HANDLEFLAG)

????????????? {

?????????????????? if(usart1_rxBuf[8] == 0)

?????????????????? {

?????????????????????? PLAY = 0;

?????????????????????? for(i=0;i<50;i++)

?????????????????????? {

??????????????????????????? usart1_rxBuf[i] = 0x00;

?????????????????????? }

?????????????????????? usart1_counter = 0;

?????????????????? }

????????????? }

???????? }

???????? SCAN_KEY(0);//按鍵掃描

???????? if(HMI_HANDLEFLAG)//接收觸摸屏數(shù)據(jù)處理

???????? {

????????????? HMI_HANDLEFLAG = 0;

????????????? CLOSE_OPEN_IO(0x01);

????????????? CLOSE_OPEN_IO(0x02);

????????????? CLOSE_OPEN_IO(0x03);

????????????? CLOSE_OPEN_IO(0x04);

????????????? CLOSE_OPEN_IO(0x05);

????????????? for(i=0;i<50;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? usart1_counter = 0;

???????? }????????????

}???

2）. PLC_Data_Wr2HMI ():數(shù)據(jù)寫入觸摸屏變量寄存器

void PLC_Data_Wr2HMI(uint16_t HMI_start_addr,uint16_t PLC_return_data_start_addr,uint8_t len)

{

???? uint8_t i;

???? usart1_txBuf[0]=0x5a;

???? usart1_txBuf[1]=0xa5;

???? usart1_txBuf[2]=len*2+3;

???? usart1_txBuf[3]=0x82;

???? usart1_txBuf[4]=((uint8_t)(HMI_start_addr>>8))&0XFF;

???? usart1_txBuf[5]=(uint8_t)(HMI_start_addr&0XFF);

???? for(i=0;i

???? {

???????? usart1_txBuf[i*2+6]=((HMI_SEND_BUF[i+PLC_return_data_start_addr] >>8)&0xff);

???????? usart1_txBuf[i*2+7]=(HMI_SEND_BUF[i+PLC_return_data_start_addr] &0xff);

???? }

???? HAL_UART_Transmit(&huart1, usart1_txBuf, len*2+6, 10);//串口發(fā)送

}

3）. WRITE_HMI ():數(shù)據(jù)寫入觸摸屏寄存器

void WRITE_HMI(uint16_t addr,uint8_t data1,uint8_t data2,uint8_t data3,uint8_t data4,uint8_t len)

{

???????? usart1_txBuf[0]=0x5a;

???????? usart1_txBuf[1]=0xa5;

???????? usart1_txBuf[2]=len*2+3;

???????? usart1_txBuf[3]=0x82;

???????? usart1_txBuf[4]=(uint8_t)((addr>>8)&0xff);

???????? usart1_txBuf[5]=(uint8_t)(addr&0xff);

???????? usart1_txBuf[6]=data1;

???????? usart1_txBuf[7]=data2;

???????? usart1_txBuf[8]=data3;

???????? usart1_txBuf[9]=data4;

???????? HAL_UART_Transmit(&huart1, usart1_txBuf, len*2+6 , 20);

}

4）. READ_HMI ():讀觸摸屏寄存器數(shù)據(jù)

void READ_HMI(uint16_t addr,uint8_t num)

{

???????? usart1_txBuf[0]=0x5a;

???????? usart1_txBuf[1]=0xa5;

???????? usart1_txBuf[2]=0x04;

???????? usart1_txBuf[3]=0x83;

???????? usart1_txBuf[4]=(uint8_t)((addr>>8)&0xff);

???????? usart1_txBuf[5]=(uint8_t)(addr&0xff);

???????? usart1_txBuf[6]=num;

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???????? HAL_UART_Transmit(&huart1, usart1_txBuf, 7 , 20);

}

5). CLOSE_OPEN_IO ():開關(guān)LED

void CLOSE_OPEN_IO(uint8_t hmi_key_value)

{

???? uint8_t i;

???? if(usart1_rxBuf[7] == 0x00&&usart1_rxBuf[8] == hmi_key_value)//LED1

???? {

???????? if(LED_FLAG[hmi_key_value-1] == 0)

???????? {

???????? ? if(hmi_key_value == 0x01)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_10, GPIO_PIN_RESET);//開LED1

????????????? }

????????????? if(hmi_key_value == 0x02)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_3, GPIO_PIN_RESET); //開LED2

????????????? }

????????????? if(hmi_key_value == 0x03)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_RESET); //開LED3

????????????? }

????????????? if(hmi_key_value == 0x04)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_RESET); //開LED4

????????????? }

????????????? if(hmi_key_value == 0x05)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_RESET); //開LED5

????????????? }

????????????? LED_FLAG[hmi_key_value-1] = 1;

???????? }

???????? else if(LED_FLAG[hmi_key_value-1] == 1)

???????? {

???????? ? if(hmi_key_value == 0x01)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_10, GPIO_PIN_SET);//關(guān)LED1

????????????? }

????????????? if(hmi_key_value == 0x02)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_3, GPIO_PIN_SET); //關(guān)LED2

????????????? }

????????????? if(hmi_key_value == 0x03)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_SET); //關(guān)LED3

????????????? }

????????????? if(hmi_key_value == 0x04)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0, GPIO_PIN_SET); //關(guān)LED4

????????????? }

????????????? if(hmi_key_value == 0x05)

????????????? {???

?????????????????? HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, GPIO_PIN_SET); //關(guān)LED5

????????????? }

????????????? LED_FLAG[hmi_key_value-1] = 0;

???????? }

???????? for(i=0;i<9;i++)

???????? {

????????????? usart1_rxBuf[i] = 0xff;

???????? }

???????? for(i=0;i<5;i++)

???????? {

????????????? HMI_SEND_BUF[i] = LED_FLAG[i];

???????? }

???????? PLC_Data_Wr2HMI(0X1000,0,5);//發(fā)送LED狀態(tài)到觸摸屏，改變LED顯示圖標(biāo)；

???????? delay_ms(50);

???? }

}

6). CLOSE_OPEN_IO ():開關(guān)LED

void SCAN_KEY(uint8_t io_key_value)?

{

???? uint8_t i;

???????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_10)==GPIO_PIN_RESET)//KEY1按下

???????? {

????????????? delay_ms(150);//去抖

????????????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_10)==GPIO_PIN_RESET)

????????????? {

?????????????????? if(HMI_FLAG[0] == 0)

?????????????????? {

?????????????????????? WRITE_HMI(0X82,0x00,0x00,0,0,1);//熄滅屏幕

?????????????????????? HMI_FLAG[0] = 1;

?????????????????? }else if(HMI_FLAG[0] == 1)

?????????????????? {

?????????????????????? WRITE_HMI(0X82,0X64,0x00,0,0,1);//點(diǎn)亮屏幕

?????????????????????? HMI_FLAG[0] = 0;

?????????????????? }

????????????? }

????????????? for(i=0;i<50;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? usart1_counter = 0;

???????? }

???????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_11)==GPIO_PIN_RESET)//KEY2按下

???????? {

????????????? delay_ms(150);//去抖

????????????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_11)==GPIO_PIN_RESET)

????????????? {

?????????????????? TEMP += 1;

?????????????????? HMI_SEND_BUF[0] = TEMP;

?????????????????? PLC_Data_Wr2HMI(0X1110,0,1);//溫度+

????????????? }

????????????? for(i=0;i<50;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? usart1_counter = 0;

???????? }

???????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_12)==GPIO_PIN_RESET)//KEY3按下

???????? {

????????????? delay_ms(150);//去抖

????????????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_12)==GPIO_PIN_RESET)

????????????? {

?????????????????? TEMP -= 1;

?????????????????? HMI_SEND_BUF[0] = TEMP;

?????????????????? PLC_Data_Wr2HMI(0X1110,0,1);//溫度-

????????????? }

????????????? for(i=0;i<50;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? usart1_counter = 0;

???????? }

???????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_13)==GPIO_PIN_RESET)//KEY4按下

???????? {

????????????? delay_ms(150);//去抖

????????????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_13)==GPIO_PIN_RESET)

????????????? {

?????????????????? if(PLAY == 0)

?????????????????? {????????????

?????????????????????? WRITE_HMI(0X00A0,0X00,0x0E,0,0,1);

?????????????????????? PLAY =1;//播放

?????????????????? }else if(PLAY == 1)

?????????????????? {??????????????????????????

?????????????????????? WRITE_HMI(0X00A0,0X00,0x00,0,0,1);

?????????????????????? PLAY =0;//停止

?????????????????? }

????????????? }

????????????? for(i=0;i<50;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? usart1_counter = 0;

???? ???? }

???????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_14)==GPIO_PIN_RESET)//KEY5按

???????? {

????????????? delay_ms(150);//去抖

????????????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_14)==GPIO_PIN_RESET)

????????????? {

?????????????????? if(VOLUME<250)

?????????????????? {

?????????????????????? VOLUME += 10;

?????????????????????? WRITE_HMI(0X00A1,VOLUME,0x00,0,0,2);//音量+

?????????????????????? delay_ms(50);

?????????????????????? HMI_SEND_BUF[0] = VOLUME;

?????????????????????? PLC_Data_Wr2HMI(0X1210,0,1);//寫當(dāng)前音量到觸摸屏

?????????????????????? delay_ms(50);

?????????????????? }

????????????? }

????????????? for(i=0;i<50;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? usart1_counter = 0;

???????? }

???????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_15)==GPIO_PIN_RESET)//KEY6按下

???????? {

????????????? delay_ms(150);//去抖

????????????? if(HAL_GPIO_ReadPin(GPIOB,GPIO_PIN_15)==GPIO_PIN_RESET)

????????????? {

?????????????????? if(VOLUME >= 10)

?????????????????? {

?????????????????????? VOLUME -= 10;

?????????????????????? WRITE_HMI(0X00A1,VOLUME,0x00,0,0,2);//音量-

?????????????????????? delay_ms(50);

?????????????????????? HMI_SEND_BUF[0] = VOLUME;

?????????????????????? PLC_Data_Wr2HMI(0X1210,0,1);//寫當(dāng)前音量到觸摸屏

?????????????????????? delay_ms(50);

?????????????????? }????????????

????????????? }

????????????? for(i=0;i<50;i++)

????????????? {

?????????????????? usart1_rxBuf[i] = 0x00;

????????????? }

????????????? usart1_counter = 0;

???????? }

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}

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7). delay_ms ():延時(shí)函數(shù)，不精確慎用

void delay_ms(uint16_t nms)

{

???? uint16_t i,j;

???? for(i=0;i

???? {

???????? for(j=0;j<10000;j++)

???????? {

????????????? ;

???????? }

???? }

}

8). USART1_IRQHandler ():數(shù)據(jù)接收中斷

void USART1_IRQHandler(void)

{

? HAL_UART_IRQHandler(&huart1);

???? if(usart1_rxBuf[0] == 0x5a&&usart1_rxBuf[1] == 0xa5&&usart1_rxBuf[2])

???? {

???????? if(usart1_counter >= 3&&usart1_counter<(usart1_rxBuf[2]+3))

???????? {

????????????? usart1_rxBuf[usart1_counter] = usart1_data;

????????????? usart1_counter++;

???????? }

???????? if(usart1_counter >= 3&&usart1_counter>=(usart1_rxBuf[2]+3))

???????? {

????????????? HMI_HANDLEFLAG = 1;//接收完成標(biāo)志

???????? }

???? }

???? if(usart1_counter < 3)

???? {???

???????? usart1_rxBuf[usart1_counter] = usart1_data;???

???????? usart1_counter++;

???? }

???? if(HMI_HANDLEFLAG)

???? {

???????? usart1_counter = 0;

???? }

???? HAL_UART_Receive_IT(&huart1,&usart1_data,1);//開接收中斷

}