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Hetai ht32 & taojingchi tjc--t0 serial port screen learning notes

2022-07-21 20:25:00 【LiangWF22】

Set up the serial port screen development environment

Needless to say, the advantages of serial port screen , All the teachers and masters who have used it say well ！

Develop special PC software download ： Portal Mainly used to design screen interface , Easy and convenient .

1、 After the software is installed, click new project

2、 Choose the directory you need to store , Input file name , Click save

3、 Select the corresponding device （ The equipment number is printed on the back ） I choose TJC3224T024_011
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4、 Select the screen display direction and character encoding （ The default can be ）, Click on OK Complete the creation of the project

Module data download ： Data center http://wiki.tjc1688.com/doku.php?id=start

For the basic introduction of taojingchi screen, please refer to the brother's taojingchi series blog ： Portal , The components of each part involve .

Communication between serial port screen and single chip microcomputer

If you haven't contacted the taojingchi serial port screen, you may not know how to connect the screen with the MCU .

The problems encountered may include the following ：

（1） Do you need to program the serial port register of the serial port screen ？

In the passive parsing mode , Unwanted . Send statements directly through the single-chip microcomputer / Instructions can rewrite some components of the screen .

Instruction set ：https://leoeinstein.lanzous.com/i4ZRUkbc1ji

example ： As shown in the figure below , I want to rewrite the progress bar j0 The length of , It only needs
Send the following statement through MCU / Instructions ：
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change j0.val The value of is 80 Code slice of

//  change  j0.val Value 
Usart_SendStr(COM1_PORT,"j0.val=80");//COM1_PORT It is the serial port on the single chip microcomputer ,j0.val=80 It's a specific instruction 
Usart_Sendbyte(COM1_PORT,0xFF);// The following three are terminators 
Usart_Sendbyte(COM1_PORT,0xFF);
Usart_Sendbyte(COM1_PORT,0xFF);

All assignment operations are in serial port transmission mode , You must add three
0xff As an end sign

And such as change t0 Of Text content by “99” Of t0.txt Code chip as follows

Usart_SendStr(COM1_PORT,"t0.txt=");//COM1_PORT It is the serial port on the single chip microcomputer ,t0.txt="99" Is a specific statement / Instructions 
Usart_Sendbyte(COM1_PORT,34);// quotes 
Int2Char_Send(99);// The integer is converted to character type and sent 
Usart_Sendbyte(COM1_PORT,34);// quotes 
Usart_Sendbyte(COM1_PORT,0xFF);// The following three are terminators 
Usart_Sendbyte(COM1_PORT,0xFF);
Usart_Sendbyte(COM1_PORT,0xFF);

COM1_PORT It is the serial port on the single chip microcomputer ,j0.val=80 It's a specific instruction , For other instructions, please refer to the information of taojingchi serial port screen .

And for SCM serial port configuration , Interested friends can refer to my previous blog post ： Hetai HT32F52352 Serial communication learning notes

Serial port screen receives Terminator After that, the display will be refreshed automatically , So I want to change the number of each control / Text , As long as it is sent by MCU sentence / Instructions that will do .

（2） Well designed UI How to download the interface ？

The interface designed on the upper computer , There are two main ways to download to the serial port screen .

First of all 、 Directly through USB_TTL Burner download .

The connection method is as follows: ：

Burners	Serial port screen
5V/VCC	5V/VCC
GND	GND
TXD	RXD
RXD	TXD

After connecting the line, click “ download ” , After compilation, a pop-up will pop up “ Serial download ” The window of , Select the corresponding serial port number , Click on “ Go online and start downloading ” Wait for the download to complete .
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The disadvantage of this method is that the speed is a little slow .

It is worth noting that , On the screen “ Pre initialization event ” Next, you need to set the baud rate of the serial port screen to be consistent with the serial port baud rate of the single chip microcomputer ！

Otherwise, the communication will fail .
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second 、 Download through memory card .

There is usually a metal memory card slot on the back of the screen , hold UI Copy the interface to the memory card , Then insert the memory card into the card slot , When the screen is turned on, it will automatically read the design interface file .

Faster , Especially download larger UI When you file , apparent advantages .

by the way , There are many serial port screens on the Internet UI Routine for , website ： Am I

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