I have been trying to get theTCP/IP stack for FreeRTOS to build. The issue that I am having now is that there is no hardware specific source code for my development platform (ie. (formerly Freescale) NXP FRDM-K64. At this point I tried to use NXP LPC18xx NetworkInterface.c but I am getting some errors specific to the hardware. ~~~ Invoking: MCU C Compiler arm-none-eabi-gcc -DFSLRTOSBM -DSDKOSBAREMETAL -DSDKDEBUGCONSOLE=0 -DCRINTEGERPRINTF -DPRINTFFLOATENABLE=0 -DFSLRTOSFREERTOS -DSDKOSFREERTOS -DCPUMK64FN1M0VLL12 -DCPUMK64FN1M0VLL12cm4 -DMCUXPRESSO -DUSECMSIS -DDEBUG -DREDLIB -I../board -I../source -I../ -I../amazon-freertos/include -I../amazon-freertos/FreeRTOS/portable -I../drivers -I../device -I../CMSIS -I../CMSISdriver -I../component/serialmanager -I../component/uart -I../utilities -O0 -fno-common -g3 -Wall -c -ffunction-sections -fdata-sections -ffreestanding -fno-builtin -mcpu=cortex-m4 -mfpu=fpv4-sp-d16 -mfloat-abi=hard -mthumb -DREDLIB -specs=redlib.specs -MMD -MP -MF”drivers/fsladc16.d” -MT”drivers/fsladc16.o” -MT”drivers/fsladc16.d” -o “drivers/fsladc16.o” “../drivers/fsladc16.c” ../source/NetworkInterface.c:67:3: error: #error please define configNUMRXDESCRIPTORS in your FreeRTOSIPConfig.h #error please define configNUMRXDESCRIPTORS in your FreeRTOSIPConfig.h ^~~~~ ../source/NetworkInterface.c:71:3: error: #error please define configNUMTXDESCRIPTORS in your FreeRTOSIPConfig.h #error please define configNUMTXDESCRIPTORS in your FreeRTOSIPConfig.h ^~~~~ ../source/NetworkInterface.c:75:3: error: #error NETWORKIRQHandler must be defined to the name of the function that is installed in the interrupt vector table to handle Ethernet interrupts. #error NETWORKIRQHandler must be defined to the name of the function that is installed in the interrupt vector table to handle Ethernet interrupts. ^~~~~ ~~~ Any ideas ? The solution needs to work on a NXP FRDM-K64 board. Randy Seedle

I suspect you will find a network driver for that part on the web somewhere. As for the error message you are getting – the error message is telling you what to do – define configNUMRXDESCRIPTORS in FreeRTOSIPConfig.h – so then look at why. If I search the source code for the error I see it only appears in the LPCxx version of the network interface https://sourceforge.net/p/freertos/code/HEAD/tree/tags/V10.1.1/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/portable/NetworkInterface/LPC18xx/NetworkInterface.c#l72 – then searching that file for the constant it is telling me I need to define I see it is used throughout the file, for example https://sourceforge.net/p/freertos/code/HEAD/tree/tags/V10.1.1/FreeRTOS-Plus/Source/FreeRTOS-Plus-TCP/portable/NetworkInterface/LPC18xx/NetworkInterface.c#l200 so if it is not defined the file won’t build and the error message is giving a hint as to why. So that particular driver requires those #defines in addition to the ones that are always required in the FreeRTOSIPConfig.h file. If you define then, then the error will go away, but I don’t think that is helpful as the LPCxx driver is presumably using a very different Ethernet MAC to the K64 as one part was designed by NXP and the other by Freescale (although they could conceivably have licensed the MAC hardware IP from the same same place.