si4844 mechanically tuned digital display full band radio

   Using ST7565LCD liquid crystal display (screen of a certain Baoan Xinjia). There is no backlight, so a 4020RGB backlight is added to display the colorful backlight. Added DS3231 high-precision clock and DS18B20 temperature display. There is also a Bluetooth TFT card player designed by JL Jerry. Because the buttons are connected in parallel with the radio, there is a conflict. This function does not need to be used. Time setting: Press BASS- VoL- at the same time to enter the setting menu BASS+ year setting 18-60 years can only be increased upwards. The BAND+ month setting also increases by 1-12, the vol+ day setting also increases by 1-31, the bass-hour setting also increases by 0-24, the BAND-minute setting also increases by 0-59, and the VOL-second setting also increases by 0- 59. After setting, press the RGB LED key to save the settings, so that the settings can be accurate to the second. Press SET key to exit setting. I’ll talk about other functions when I have time. Due to PCB space limitations, the AM antenna is too close to the CPU to cause high interference. Improvements will be made in the future (adjusting component locations or adding shielding covers).
   Attached are two boards with PCB proof files. As well as SI4844B20 Chinese manual and official PCB design specification DEMO.
   Program compilation instructions: To build the Arfuino For STM platform, you need to first download the MAPLE firmware for STM32F103C8T6 to support Arduino software. Specifically Baidu. The attachment comes with an Arduino program. Libraries used: Please download in the Arduino software. PU2CLRSI4844, U8G2, DS3231. The program is a bit messy, just a novice.