# Code errors was not declared **URL:** \ **Category:** Programming\ **Created:** [August 12, 2021, 12:34am UTC](https://forum.arduino.cc/t/code-errors-was-not-declared/894797 "2021-08-12T00:34:57Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![newfie98](https://avatars.discourse-cdn.com/v4/letter/n/8edcca/32.png) [@newfie98](https://forum.arduino.cc/u/newfie98)\ **Post date:** [August 12, 2021, 12:34am UTC](https://forum.arduino.cc/t/code-errors-was-not-declared/894797/1 "2021-08-12T00:34:57Z")
Arduino: 1.8.15 (Linux), Board: "Arduino Uno" In file included from /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:44:0: /opt/arduino-1.8.15/libraries/Keyboard/src/Keyboard.h:29:2: warning: #warning "Using legacy HID core (non pluggable)" [-Wcpp] #warning "Using legacy HID core (non pluggable)" ^ ~~~~~~ sketch\_aug11a:48:52: error: 'USB\_KeyboardReport\_Data\_t' was not declared in this scope static uint8\_t PrevKeyboardHIDReportBuffer[sizeof (USB\_KeyboardReport\_Data\_t)]; ^ ~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:58:1: error: 'USB\_ClassInfo\_HID\_Device\_t' does not name a type USB\_ClassInfo\_HID\_Device\_t Keyboard\_HID\_Interface = ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:172:42: error: 'USB\_ClassInfo\_HID\_Device\_t' was not declared in this scope bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:172:70: error: expected primary-expression before 'const' bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~ sketch\_aug11a:172:101: error: expected primary-expression before '_' token bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t_ const HIDInterfaceInfo, ^ sketch\_aug11a:172:103: error: expected primary-expression before 'const' bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ sketch\_aug11a:172:119: error: expected primary-expression before 'const' bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ sketch\_aug11a:172:145: error: expected primary-expression before 'void' bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ sketch\_aug11a:172:171: error: expected primary-expression before '_' token bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t_ const HIDInterfaceInfo, ^ sketch\_aug11a:172:173: error: expected primary-expression before 'const' bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:172:189: warning: expression list treated as compound expression in initializer [-fpermissive] bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ sketch\_aug11a:258:43: error: variable or field 'CALLBACK\_HID\_Device\_ProcessHIDReport' declared void void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:258:43: error: 'USB\_ClassInfo\_HID\_Device\_t' was not declared in this scope sketch\_aug11a:258:71: error: expected primary-expression before 'const' void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~ sketch\_aug11a:258:95: error: expected primary-expression before 'const' void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ sketch\_aug11a:258:119: error: expected primary-expression before 'const' void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ sketch\_aug11a:258:145: error: expected primary-expression before 'const' void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ sketch\_aug11a:258:169: error: expected primary-expression before 'const' void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ In file included from /opt/arduino-1.8.15/hardware/tools/avr/avr/include/avr/io.h:99:0, from /opt/arduino-1.8.15/hardware/tools/avr/avr/include/avr/pgmspace.h:90, from /opt/arduino-1.8.15/hardware/arduino/avr/cores/arduino/Arduino.h:28, from sketch/sketch\_aug11a.ino.cpp:1: /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino: In function 'void \_\_vector\_16()': sketch\_aug11a:79:18: error: 'PC7' was not declared in this scope PORTC |= \_BV(PC7); // Turn on the led ^ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:79:18: note: suggested alternative: 'PB7' sketch\_aug11a:84:19: error: 'PC7' was not declared in this scope PORTC &= ~\_BV(PC7); ^ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:84:19: note: suggested alternative: 'PB7' /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino: In function 'int main()': sketch\_aug11a:99:3: error: 'GlobalInterruptEnable' was not declared in this scope GlobalInterruptEnable(); ^ ~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:103:25: error: 'Keyboard\_HID\_Interface' was not declared in this scope HID\_Device\_USBTask(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:103:5: error: 'HID\_Device\_USBTask' was not declared in this scope HID\_Device\_USBTask(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~ sketch\_aug11a:104:5: error: 'USB\_USBTask' was not declared in this scope USB\_USBTask(); ^ ~~~~~~~~~~ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino: In function 'void SetupHardware()': sketch\_aug11a:113:3: error: 'wdt\_disable' was not declared in this scope wdt\_disable(); ^ ~~~~~~~~~~ sketch\_aug11a:116:22: error: 'clock\_div\_1' was not declared in this scope clock\_prescale\_set(clock\_div\_1); ^ ~~~~~~~~~~ sketch\_aug11a:116:3: error: 'clock\_prescale\_set' was not declared in this scope clock\_prescale\_set(clock\_div\_1); ^ ~~~~~~~~~~~~~~~~~ sketch\_aug11a:119:3: error: 'USB\_Init' was not declared in this scope USB\_Init(); ^ ~~~~~~~ In file included from /opt/arduino-1.8.15/hardware/tools/avr/avr/include/avr/io.h:99:0, from /opt/arduino-1.8.15/hardware/tools/avr/avr/include/avr/pgmspace.h:90, from /opt/arduino-1.8.15/hardware/arduino/avr/cores/arduino/Arduino.h:28, from sketch/sketch\_aug11a.ino.cpp:1: sketch\_aug11a:121:15: error: 'PC7' was not declared in this scope DDRC |= \_BV(PC7); // PC7 as output ^ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:121:15: note: suggested alternative: 'PB7' /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino: In function 'void EVENT\_USB\_Device\_ConfigurationChanged()': sketch\_aug11a:144:51: error: 'Keyboard\_HID\_Interface' was not declared in this scope ConfigSuccess &= HID\_Device\_ConfigureEndpoints(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:144:20: error: 'HID\_Device\_ConfigureEndpoints' was not declared in this scope ConfigSuccess &= HID\_Device\_ConfigureEndpoints(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:146:3: error: 'USB\_Device\_EnableSOFEvents' was not declared in this scope USB\_Device\_EnableSOFEvents(); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino: In function 'void EVENT\_USB\_Device\_ControlRequest()': sketch\_aug11a:153:37: error: 'Keyboard\_HID\_Interface' was not declared in this scope HID\_Device\_ProcessControlRequest(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:153:3: error: 'HID\_Device\_ProcessControlRequest' was not declared in this scope HID\_Device\_ProcessControlRequest(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:153:3: note: suggested alternative: 'EVENT\_USB\_Device\_ControlRequest' HID\_Device\_ProcessControlRequest(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ EVENT\_USB\_Device\_ControlRequest /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino: In function 'void EVENT\_USB\_Device\_StartOfFrame()': sketch\_aug11a:159:34: error: 'Keyboard\_HID\_Interface' was not declared in this scope HID\_Device\_MillisecondElapsed(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:159:3: error: 'HID\_Device\_MillisecondElapsed' was not declared in this scope HID\_Device\_MillisecondElapsed(&Keyboard\_HID\_Interface); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino: At global scope: sketch\_aug11a:172:42: error: redefinition of 'bool CALLBACK\_HID\_Device\_CreateHIDReport' bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:172:6: note: 'bool CALLBACK\_HID\_Device\_CreateHIDReport' previously defined here bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:172:42: error: 'USB\_ClassInfo\_HID\_Device\_t' was not declared in this scope bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:172:70: error: expected primary-expression before 'const' bool CALLBACK\_HID\_Device\_CreateHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~ sketch\_aug11a:173:49: error: expected primary-expression before '_' token uint8\_t_ const ReportID, ^ sketch\_aug11a:173:51: error: expected primary-expression before 'const' uint8\_t\* const ReportID, ^ ~~~~ sketch\_aug11a:174:42: error: expected primary-expression before 'const' const uint8\_t ReportType, ^ ~~~~ sketch\_aug11a:175:42: error: expected primary-expression before 'void' void\* ReportData, ^~~~ sketch\_aug11a:176:50: error: expected primary-expression before '_' token uint16\_t_ const ReportSize) ^ sketch\_aug11a:176:52: error: expected primary-expression before 'const' uint16\_t\* const ReportSize) ^ ~~~~ sketch\_aug11a:258:43: error: variable or field 'CALLBACK\_HID\_Device\_ProcessHIDReport' declared void void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ sketch\_aug11a:258:43: error: 'USB\_ClassInfo\_HID\_Device\_t' was not declared in this scope sketch\_aug11a:258:71: error: expected primary-expression before 'const' void CALLBACK\_HID\_Device\_ProcessHIDReport(USB\_ClassInfo\_HID\_Device\_t\* const HIDInterfaceInfo, ^ ~~~~ sketch\_aug11a:259:43: error: expected primary-expression before 'const' const uint8\_t ReportID, ^ ~~~~ sketch\_aug11a:260:43: error: expected primary-expression before 'const' const uint8\_t ReportType, ^ ~~~~ sketch\_aug11a:261:43: error: expected primary-expression before 'const' const void\* ReportData, ^ ~~~~ sketch\_aug11a:262:43: error: expected primary-expression before 'const' const uint16\_t ReportSize) ^ ~~~~ exit status 1 'USB\_KeyboardReport\_Data\_t' was not declared in this scope This report would have more information with "Show verbose output during compilation" option enabled in File -\> Preferences. ---
**Author:** ![pert](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/pert/32/217111_2.png) [@pert](https://forum.arduino.cc/u/pert)\ **Post date:** [August 12, 2021, 12:37am UTC](https://forum.arduino.cc/t/code-errors-was-not-declared/894797/2 "2021-08-12T00:37:51Z")
> [@newfie98](#): > > Arduino: 1.8.15 (Linux), Board: "Arduino Uno" > > In file included from /home/pi/Arduino/sketch\_aug11a/sketch\_aug11a.ino:44:0: > /opt/arduino-1.8.15/libraries/Keyboard/src/Keyboard.h:29:2: warning: #warning "Using legacy HID core (non pluggable)" [-Wcpp] Hi @newfie98. The Arduino Uno board is not compatible with the Keyboard library. If you need keyboard emulation capabilities, you must use one of the Arduino boards that has it. Some nice options: - [Arduino Leonardo](https://store.arduino.cc/arduino-leonardo-with-headers) - [Arduino Micro](https://store.arduino.cc/arduino-micro) - [Pro Micro](https://www.sparkfun.com/products/12640) - [Nano 33 IoT](https://store.arduino.cc/arduino-nano-33-iot) - [MKR Boards](https://store.arduino.cc/catalogsearch/result/?tab=store&q=mkr) ---
**Author:** ![newfie98](https://avatars.discourse-cdn.com/v4/letter/n/8edcca/32.png) [@newfie98](https://forum.arduino.cc/u/newfie98)\ **Post date:** [August 12, 2021, 1:21am UTC](https://forum.arduino.cc/t/code-errors-was-not-declared/894797/3 "2021-08-12T01:21:00Z")
Thanks pert!! ---
**Author:** ![pert](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/pert/32/217111_2.png) [@pert](https://forum.arduino.cc/u/pert)\ **Post date:** [August 12, 2021, 1:22am UTC](https://forum.arduino.cc/t/code-errors-was-not-declared/894797/4 "2021-08-12T01:22:48Z")
You're welcome. I'm glad if I was able to be of assistance. Enjoy! Per ---
**Author:** ![system](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/system/32/1140315_2.png) [@system](https://forum.arduino.cc/u/system)\ **Post date:** [December 10, 2021, 1:23am UTC](https://forum.arduino.cc/t/code-errors-was-not-declared/894797/5 "2021-12-10T01:23:07Z")
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