I am trying to get modbus mastermode rs485 example working on nucleo-f4x1re following the example on the youtube channel. I am getting undefined reference errors during linking and am not sure if I need to modify source or am missing a configuration option. The device I am interacting with is set at a baudrate of 9600 with no parity instead of the baudrate in the video. But other than that I believe I followed the video closely.
I started modifying the nsh config up to this point and have zerocross and gpio working, but I am stuck at the moment on this rs485 bit. Appreciate any help. Also, I have not participated in many mailing lists, so if I am in the wrong place or I am breakin any etiquette rules I apologize in advance and appreciate your help finding any etiquette rules or posts to straighten me out. Attached is my build output and config file and below is a small build output snippet. include -D__NuttX__ -DNDEBUG -D__KERNEL__ -I /home/david/nuttxspace/nuttx/arch/arm/src/chip -I /home/david/nuttxspace/nuttx/arch/arm/src/common -I /home/david/nuttxspace/nuttx/arch/arm/src/armv7-m -I /home/david/nuttxspace/nuttx/sched /home/david/nuttxspace/nuttx/boards/arm/stm32/nucleo-f4x1re/scripts/f401re.ld -o /home/david/nuttxspace/nuttx/boards/arm/stm32/nucleo-f4x1re/scripts/f401re.ld.tmp echo "LD: nuttx" LD: nuttx arm-none-eabi-ld --entry=__start -nostdlib --gc-sections --cref -Map=/home/david/nuttxspace/nuttx/nuttx.map -T/home/david/nuttxspace/nuttx/boards/arm/stm32/nucleo-f4x1re/scripts/f401re.ld.tmp -L /home/david/nuttxspace/nuttx/staging -L /home/david/nuttxspace/nuttx/arch/arm/src/board \ -o /home/david/nuttxspace/nuttx/nuttx \ --start-group -lsched -ldrivers -lboards -lc -lmm -larch -lxx -lapps -lfs -lbinfmt -lboard -lboard /usr/lib/gcc/arm-none-eabi/10.3.1/thumb/v7e-m/nofp/libgcc.a /usr/lib/gcc/arm-none-eabi/10.3.1/../../../arm-none-eabi/lib/thumb/v7e-m/nofp/libm.a --end-group arm-none-eabi-ld: /home/david/nuttxspace/nuttx/staging/libapps.a(modbus_main.c.home.david.nuttxspace.apps.examples.modbus_1.o): in function `modbus_pollthread': modbus_main.c:(.text.modbus_pollthread+0x56): undefined reference to `eMBInit' arm-none-eabi-ld: modbus_main.c:(.text.modbus_pollthread+0x82): undefined reference to `eMBSetSlaveID' arm-none-eabi-ld: modbus_main.c:(.text.modbus_pollthread+0x98): undefined reference to `eMBClose' arm-none-eabi-ld: modbus_main.c:(.text.modbus_pollthread+0x9e): undefined reference to `eMBEnable' arm-none-eabi-ld: modbus_main.c:(.text.modbus_pollthread+0xbe): undefined reference to `eMBPoll' arm-none-eabi-ld: modbus_main.c:(.text.modbus_pollthread+0xc4): undefined reference to `eMBDisable' arm-none-eabi-ld: modbus_main.c:(.text.modbus_pollthread+0xc8): undefined reference to `eMBClose' make[1]: *** [Makefile:211: nuttx] Error 1 make[1]: Leaving directory '/home/david/nuttxspace/nuttx/arch/arm/src' make: *** [tools/Unix.mk:546: nuttx] Error 2 "make all" terminated with exit code 2. Build might be incomplete.
