【CH579M-R1】+PWM breathing light and serial communication experiment

hujj

【CH579M-R1】+PWM breathing light and serial communication experiment [Copy link]

 

 

I originally planned to compile and download the manufacturer's BLE routine directly. I opened the peripheral project file according to the steps in the "Instruction Manual" and tried to compile but an error occurred. The main error was the lack of macro definition (as shown below). I couldn't find the macro definition file for a while and couldn't debug it, so I had to switch to other experiments.

First, I copied teacher jinglixixi's homework and tested the breathing light. I used LED3 and LED4 on the board directly, and drove them through PB0 and PB1. The following is the program code. At first, it ran with a delay of 500 milliseconds, but the breathing light changed too slowly. Later, I changed it to a delay of 50 milliseconds, and the effect was better:

int main()
{
char i;
GPIOB_ModeCfg(GPIO_Pin_0, GPIO_ModeOut_PP_5mA); // PB1 - PWM6
GPIOB_ModeCfg(GPIO_Pin_1, GPIO_ModeOut_PP_5mA); // PB1 - PWM7
PWMX_CLKCfg( 4 );
PWMX_CycleCfg( PWMX_Cycle_64 );
while(1)
{
for(i =0;i<64;i++)
{
PWMX_ACTOUT( CH_PWM6, 64*i/64, Low_Level, ENABLE);
PWMX_ACTOUT( CH_PWM7, 64*i/64, Low_Level, ENABLE);
mDelaymS(50);
}

for(i= 64;i>0;i--)
{
PWMX_ACTOUT( CH_PWM6, 64*i/64, Low_Level, ENABLE);
PWMX_ACTOUT( CH_PWM7, 64*i/64, Low_Level, ENABLE);
mDelaymS(50);
}
}
}

The compressed file of the video of the breathing light experiment is over 25M and cannot be uploaded. I will add the photos tomorrow.

After that, I experimented with serial communication. I used the UART1 project example provided by the manufacturer without any modification. I just used a TTF to USB module from Qinheng when debugging. The computer could recognize the serial port, but could not send or receive data. Later, I used a module bought from Taobao and the test was successful. Here are the test photos:

It is just that the power supply cannot be obtained through the TTF to USB module, and the development board needs to be powered separately. I used a power bank, but the download test is troublesome and requires changing the cable.

Below is a screenshot of the serial port debugging tool test:

okhxyyo

Qinheng CH579M-R1 Development Board Review

Summary post: https://bbs.eeworld.com.cn/thread-1140005-1-1.html

宋元浩

It seems that the header file is missing, typedef custom data type

hujj

Song Yuanhao posted on 2020-9-11 22:28 It seems that the header file is missing, typedef custom data type

It should be, but I don't know where this header file is.

hujj

Here are some photos of the breathing light experiment:

jinglixixi

Not bad, like it!

hujj

jinglixixi posted on 2020-9-12 09:42 Not bad, like it!

Thank you for the compliment. This breathing light is copied from you.

jinglixixi

hujj posted on 2020-9-12 10:02 Thank you for the compliment. This breathing light is copied from you.

Not really, technology belongs to everyone, looking forward to new posts.

littleshrimp

Make a GIF to see the breathing light effect will be better

Recommend an open source gif conversion software ScreenToGif

hujj

littleshrimp posted on 2020-9-12 20:56 It would be better to make a GIF to see the breathing light effect. I recommend an open source GIF conversion software ScreenToGif

Thanks for the recommendation, I am downloading and installing it. I have downloaded and installed several conversion software or online conversion before, but they either charge a fee or a huge watermark occupies the center of the picture, making it impossible to watch.

hujj

My first attempt to convert the mp4 format to gif format was successful, but the file size did not decrease much. The mp4 video file was more than 25M, and after the conversion it was still more than 24M. I will try again.

littleshrimp

hujj posted on 2020-9-12 21:24 The first attempt to convert mp4 format to gif format was successful, but the file size did not decrease much. The mp4 video file is more than 25M, and the conversion...

Can reduce resolution and frame rate

程英茂

Learned