My advice is to read the board and MCU datasheet. Check MCU's peripherals, and how they can be used in your application. Some MCU's have a PPI (Programmable Per

My advice is to read the board and MCU datasheet. Check MCU's peripherals, and how they can be used in your application. Some MCU's have a PPI (Programmable Peripheral Interconnect) it is clever to use it, as peripherals can operate independently together from the processor, especially combined with direct memory access. Learn bitwise operations as you'll need it to configure the peripheral's registers. Use a logic analyzer to confirm the bitstream to pinpoint errors. Lately I started experimenting with radios. It is difficult. Let me know if someone has a good guide they read.