Radio Frequency Front End controller firmware, powered by Nuttx, using the Cortex M3 LPC1769 microcontroller.

The RFFE device is used for signal conditioning of the RF signal obtained from the BPM antennas. The uC is in charge of temperature monitoring / control and setting the RF attenuation level. The uC listens to TCP port 9001 for SCPI messages.

First make sure you have installed on your system:

• make
• arm-none-eabi-gcc
• arm-none-eabi-binutils
• arm-none-eabi-newlib
• kconfig-frontends - See instructions bellow
• openocd

To build, you need to configure nuttx and start the compilation:

$ ./make.sh configure
$ ./make.sh build

If everything goes well, the files nuttx/nuttx (elf with debug symbols) and nuttx/nuttx.bin (raw binary) will be available.

An out-of-tree version of kconfig-frontends is provided under tools/kconfig-frontends. To build it make sure you have the following tools installed on your system:

• automake
• autoconf
• m4
• flex
• bison
• gperf

Enter the tools/kconfig-frontends directory and execute:

$ aclocal
$ autoconf
$ automake
$ ./configure --prefix=your_prefix_path
$ make install

Make sure to include the your_prefix_path/usr/bin directory in your PATH environment variable.

The nuttx.bin image does not contains the bootloader and is expected to be loaded at 0x00010000, so if you are flashing blank uCs, flash the bootloader from bootloader/ first.

To flash using a CMSIS-DAP compatible debugger (via openocd) execute:

$ ./make.sh flash

To upload via lpc21isp you need an firmware image with the bootloader. This can be done concatenating the bootloader raw binary (64KiB padded) with the nuttx.bin file. After that, connect the USB cable to the RFFE board and flash:

$ ./lpc21isp -control -bin -wipe firmware_complete.bin <serial_port> 230400 12000

The lpc21isp utility can be obtained here.

To update the RFFE firmware via network use the ./utils/fw_update.py script:

$ ./utils/fw_update.py <ip_addr> nuttx/nuttx.bin <version>