GPS cycling computer based on LCSC Skystar

Design Background:
I've always wanted to develop a GPS codec to display current location information, speed, and UTC time. Luckily, there was a promotion from SkyStar, and I got a 20 RMB coupon, which led to this DIY project.
 
Materials:
1- 128 * 160 SPI screen (ST7735)
2- GP-02 
3- SkyStar development board
 
GPS circuit. Main Code : The main code of the program is actually parsing GPS data, such as GNGGA DATA or GNRMC Data. By parsing the above data, the current GPS information can be obtained, such as speed, altitude, and latitude and longitude. The following image shows the serial
 
port output when the program does not find a satellite (note that GPS satellites are difficult to find indoors). Data output when a satellite is found. Screen display when a satellite is found (Updated 14/10/2024): Problems : This DIY project encountered some problems, such as screen flickering when using the screen driver. A while ago, my computer system update failed, and when I was repairing the system, I accidentally deleted the system disk, and the original screen driver was also lost. After two days of struggling, I still haven't found a good solution.  Another problem that occurred during the DIY process: I didn't design the DC line in the schematic diagram, which resulted in the DC jumper being connected to the serial port. When receiving GPS data, I needed to control the display, which led to incorrect data generation. The above schematic error has been fixed (the program code has been fixed). Attachments: 1- test-uart.7z (GPS data not displayed on the screen after parsing) 2- test-uart-screen display GPS information.zip (Displays GPS information normally).