The crazyradio dongle is based on a Nordic semiconductor nRF24LU1 chip. This chip contains a 8051-compatible microcontroller and is programmed using the SDCC compiler.

As of version 0.31 the dongle program must be compiled with an SDCC version < 3.0 because of some register declaration are broken with SDCC 3.

These instruction works on a recent (as of 2012-02) linux distribution:

• Download SDCC 2.9 http://sourceforge.net/projects/sdcc/files/sdcc-linux-x86/2.9.0/
• Extract SDCC in your home folder
• The radio can be compiled as follow:

[crazyradio]$ export SDCC=~/sdcc/bin/sdcc
[crazyradio]$ make
mkdir -p bin
/home/arnaud/sdcc/bin/sdcc -Iinc/ --model-medium -c src/main.c -o bin/main.rel
/home/arnaud/sdcc/bin/sdcc -Iinc/ --model-medium -c src/radio.c -o bin/radio.rel
/home/arnaud/sdcc/bin/sdcc -Iinc/ --model-medium -c src/usb.c -o bin/usb.rel
/home/arnaud/sdcc/bin/sdcc -Iinc/ --model-medium -c src/usbDescriptor.c -o bin/usbDescriptor.rel
/home/arnaud/sdcc/bin/sdcc -Iinc/ --model-medium -c src/led.c -o bin/led.rel
/home/arnaud/sdcc/bin/sdcc --xram-loc 0x8000 --xram-size 2048 --model-medium bin/main.rel bin/radio.rel bin/usb.rel bin/usbDescriptor.rel bin/led.rel -o bin/cradio.ihx
objcopy -I ihex bin/cradio.ihx -O binary bin/cradio.bin
[crazyradio]$ 

• cradio.ihx can be programmed with the USB bootloader. cradio.bin is to be used with the SPI flasher nrfprog

nRF24LU1p datasheet