How compatible is the Xiao to an Arduino e.g. Nano?

melmerby37 · April 20, 2022, 12:33pm

A problem
Instead of just uploading modified sketches today I hit accidentally hit “Verify/compile” instead and noticed that the dcc_decoder.cpp file I had been modifying and in the seeed library, was not the one that was being used during the compile.
For some reason the program was ignoring that one and retrieving a unmodified version from a different library.

I changed the names of all the other verions of dcc_decoder.cpp & dcc_decoder.h to force the program to use the ones in the seeed library.

Doing a compile after that threw up errors from the modified dcc_decoder.cpp file:

Using board 'seeed_XIAO_m0' from platform in folder: C:\Users\Keith.DESKTOP-55532Q9\AppData\Local\Arduino15\packages\Seeeduino\hardware\samd\1.8.2
Using core 'arduino' from platform in folder: C:\Users\Keith.DESKTOP-55532Q9\AppData\Local\Arduino15\packages\Seeeduino\hardware\samd\1.8.2
Detecting libraries used...
"C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-g++" -mcpu=cortex-m0plus -mthumb -c -g -Os -w -std=gnu++14 -ffunction-sections -fdata-sections -fno-threadsafe-statics -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions "-D__SKETCH_NAME__=\"\"\"Dapol_Signal_Xiao.ino\"\"\"" -w -x c++ -E -CC -DF_CPU=48000000L -DARDUINO=10607 -DARDUINO_SEEED_XIAO_M0 -DARDUINO_ARCH_SAMD -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/Core/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/DSP/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS-Atmel\\1.2.1/CMSIS-Atmel/CMSIS/Device/ATMEL/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\variants\\XIAO_m0" "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\sketch\\Dapol_Signal_Xiao.ino.cpp" -o nul
Alternatives for DCC_Decoder.h: [[email protected]]
ResolveLibrary(DCC_Decoder.h)
  -> candidates: [[email protected]]
"C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-g++" -mcpu=cortex-m0plus -mthumb -c -g -Os -w -std=gnu++14 -ffunction-sections -fdata-sections -fno-threadsafe-statics -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions "-D__SKETCH_NAME__=\"\"\"Dapol_Signal_Xiao.ino\"\"\"" -w -x c++ -E -CC -DF_CPU=48000000L -DARDUINO=10607 -DARDUINO_SEEED_XIAO_M0 -DARDUINO_ARCH_SAMD -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/Core/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/DSP/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS-Atmel\\1.2.1/CMSIS-Atmel/CMSIS/Device/ATMEL/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\variants\\XIAO_m0" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\libraries\\DCC_Decoder-master" "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\sketch\\Dapol_Signal_Xiao.ino.cpp" -o nul
"C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-g++" -mcpu=cortex-m0plus -mthumb -c -g -Os -w -std=gnu++14 -ffunction-sections -fdata-sections -fno-threadsafe-statics -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions "-D__SKETCH_NAME__=\"\"\"Dapol_Signal_Xiao.ino\"\"\"" -w -x c++ -E -CC -DF_CPU=48000000L -DARDUINO=10607 -DARDUINO_SEEED_XIAO_M0 -DARDUINO_ARCH_SAMD -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/Core/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/DSP/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS-Atmel\\1.2.1/CMSIS-Atmel/CMSIS/Device/ATMEL/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\variants\\XIAO_m0" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\libraries\\DCC_Decoder-master" "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\libraries\\DCC_Decoder-master\\DCC_Decoder.cpp" -o nul
Generating function prototypes...
"C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-g++" -mcpu=cortex-m0plus -mthumb -c -g -Os -w -std=gnu++14 -ffunction-sections -fdata-sections -fno-threadsafe-statics -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions "-D__SKETCH_NAME__=\"\"\"Dapol_Signal_Xiao.ino\"\"\"" -w -x c++ -E -CC -DF_CPU=48000000L -DARDUINO=10607 -DARDUINO_SEEED_XIAO_M0 -DARDUINO_ARCH_SAMD -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/Core/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/DSP/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS-Atmel\\1.2.1/CMSIS-Atmel/CMSIS/Device/ATMEL/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\variants\\XIAO_m0" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\libraries\\DCC_Decoder-master" "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\sketch\\Dapol_Signal_Xiao.ino.cpp" -o "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\preproc\\ctags_target_for_gcc_minus_e.cpp"
"C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\builtin\\tools\\ctags\\5.8-arduino11/ctags" -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\preproc\\ctags_target_for_gcc_minus_e.cpp"
Compiling sketch...
"C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-g++" -mcpu=cortex-m0plus -mthumb -c -g -Os -std=gnu++14 -ffunction-sections -fdata-sections -fno-threadsafe-statics -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -MMD "-D__SKETCH_NAME__=\"\"\"Dapol_Signal_Xiao.ino\"\"\"" -DF_CPU=48000000L -DARDUINO=10607 -DARDUINO_SEEED_XIAO_M0 -DARDUINO_ARCH_SAMD -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/Core/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/DSP/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS-Atmel\\1.2.1/CMSIS-Atmel/CMSIS/Device/ATMEL/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\variants\\XIAO_m0" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\libraries\\DCC_Decoder-master" "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\sketch\\Dapol_Signal_Xiao.ino.cpp" -o "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\sketch\\Dapol_Signal_Xiao.ino.cpp.o"
C:\Users\Keith.DESKTOP-55532Q9\Documents\Arduino\Dapol_Signal_Xiao\Dapol_Signal_Xiao.ino:12:3: warning: 'typedef' was ignored in this declaration
   typedef struct DCCAccessoryData {
   ^~~~~~~
Compiling libraries...
Compiling library "DCC_Decoder-master"
"C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\arm-none-eabi-gcc\\7-2017q4/bin/arm-none-eabi-g++" -mcpu=cortex-m0plus -mthumb -c -g -Os -std=gnu++14 -ffunction-sections -fdata-sections -fno-threadsafe-statics -nostdlib --param max-inline-insns-single=500 -fno-rtti -fno-exceptions -MMD "-D__SKETCH_NAME__=\"\"\"Dapol_Signal_Xiao.ino\"\"\"" -DF_CPU=48000000L -DARDUINO=10607 -DARDUINO_SEEED_XIAO_M0 -DARDUINO_ARCH_SAMD -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" -DARDUINO_SAMD_ZERO -D__SAMD21__ -D__SAMD21G18A__ -DARM_MATH_CM0PLUS -DSEEED_XIAO_M0 -DUSB_VID=0x2886 -DUSB_PID=0x802F -DUSBCON -DUSB_CONFIG_POWER=100 "-DUSB_MANUFACTURER=\"Seeed\"" "-DUSB_PRODUCT=\"Seeed XIAO M0\"" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino/TinyUSB/Adafruit_TinyUSB_ArduinoCore/tinyusb/src" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/Core/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS\\5.7.0/CMSIS/DSP/Include/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\tools\\CMSIS-Atmel\\1.2.1/CMSIS-Atmel/CMSIS/Device/ATMEL/" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\cores\\arduino" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\variants\\XIAO_m0" "-IC:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\libraries\\DCC_Decoder-master" "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Arduino15\\packages\\Seeeduino\\hardware\\samd\\1.8.2\\libraries\\DCC_Decoder-master\\DCC_Decoder.cpp" -o "C:\\Users\\Keith.DESKTOP-55532Q9\\AppData\\Local\\Temp\\arduino-sketch-E8C477A82A9968D483CF46B123C568F8\\libraries\\DCC_Decoder-master\\DCC_Decoder.cpp.o"
C:\Users\Keith.DESKTOP-55532Q9\AppData\Local\Arduino15\packages\Seeeduino\hardware\samd\1.8.2\libraries\DCC_Decoder-master\DCC_Decoder.cpp:49:20: error: stray '\223' in program
     Serial.println(�This is the message to look for�);
                    ^
C:\Users\Keith.DESKTOP-55532Q9\AppData\Local\Arduino15\packages\Seeeduino\hardware\samd\1.8.2\libraries\DCC_Decoder-master\DCC_Decoder.cpp:49:52: error: stray '\224' in program
     Serial.println(�This is the message to look for�);
                                                    ^
C:\Users\Keith.DESKTOP-55532Q9\AppData\Local\Arduino15\packages\Seeeduino\hardware\samd\1.8.2\libraries\DCC_Decoder-master\DCC_Decoder.cpp: In static member function 'static void DCC_Decoder::DCC_Interrupt()':
C:\Users\Keith.DESKTOP-55532Q9\AppData\Local\Arduino15\packages\Seeeduino\hardware\samd\1.8.2\libraries\DCC_Decoder-master\DCC_Decoder.cpp:49:21: error: 'This' was not declared in this scope
     Serial.println(�This is the message to look for�);
                     ^~~~

Using library DCC_Decoder-master at version 1.6 in folder: C:\Users\Keith.DESKTOP-55532Q9\AppData\Local\Arduino15\packages\Seeeduino\hardware\samd\1.8.2\libraries\DCC_Decoder-master 
Compilation error: exit status 1

Looks like a few steps back needed.