SAF775X Radio

This is a multi-band radio based on the NXP Dirana3 series, specifically the SAF775X model. It supports dual-antenna reception and various advanced radio algorithms. Because a demo key is used, it will automatically reset after 3 hours of operation.
This key does not involve cracking the SAF775X chip, has no commercial value, and does not conflict with NXP's corporate rights. The demo key and some program code are from rayc345/WTCRC775X (github.com).
 
Attachments include 3D printing files and code for the casing.
It is currently incomplete, but basic functional requirements have been met. Development is currently suspended due to academic commitments.
 
The following is an additional bill of materials:



2
SMA female inner hole, welding type
Shangshen flagship store, SMA-KY


2
RG1.13 coaxial cable, 1st generation IPEX to welding
10cm


1
speaker 5038
Fusheng


several
M2 screws 6mm (countersunk)
 


several
M2 screws 10mm (round head with washer 5mm)


several
M2 hot melt nuts 3.5*4mm
 


1
10*(90~100)mm ferrite rod antenna, 470uH


1
lithium battery, with protection board
136074/136077


2
encoder keycaps 25*10mm
 


1
FPC ribbon cable (different sides) 16P, 1mm, length 50~100mm


2
plastic feet 32*6*2
 



headphone socket must use the one from LCSC Mall, other alternatives cannot be used.
 
Download program method:
Method 1. Connect USB to computer (CH340 driver needs to be installed), turn the switch to headphone direction, short J401, press the reset button, and use GD32 All In One
Method 2 for downloading
 
updates using the GD32 All In One Programmer (provided by GD's official website) via serial port
: Connect to the computer, enter the menu, go to the Device menu, scroll to item 5, press the OK button, and hold the OK button until the screen turns white.
 
Update log
20230913
: Modified the audio circuitry, reducing background noise.