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1. 

   seandeg
   Member

   Hi All,

   Am trying out the blink .pde program from http://akb77.com/g/mcu/maplecoos/
   Have placed the MapleCoOS directory under libraries in the IDE.
   Have replaced the systick.c and systick.h in hardware/leaflabs/cores/maple with the alternative dot c and dot h files from http://akb77.com/g/files/media/systick.c and http://akb77.com/g/files/media/systick.h

   Getting compile error
   "Settings\Admin\Desktop\maple-ide-0.0.12-windowsxp32\maple-ide-0.0.12-windowsxp32\hardware\leaflabs\cores\maple\/systick.h:52:

   error: '__read' was not declared in this scope"

   I can not find where __read comes from --- can not find it at any scope. From google search found a reference to it being in the GNU C library however. So I presume it is in the gcc libraries at some level under hardware/tools/arm.

   So my question is how do I declare it the scope required ---or get aroud this error by any means?

   Thanks

   Posted 2 years ago #
2. 

   ala42
   Member

   This should do what is needed
   #define __read(p) (*(volatile unsigned int*)(p))

   Posted 2 years ago #
3. 

   seandeg
   Member

   Hi ala42,
   thanks for that #define. It fixed the problem for me. I made a similar #define for __write.

   That was good --- got further along the compile without error until an "undefined reference to 'systick_uptime_millis'" in usb_serial.cpp. systick.h is included in usb_serial.cpp which does have systick_uptime_millis defined and initialised.
   But at the line number 74 of usb_serial.cpp there is no 'systick_uptime_millis' at all, only a 'millis'.

   millis is defined in wirish_time.h, and wirish_time.h is indeed included in usb_serial.cpp

   So there should be no error relating to 'millis' or 'systick_uptime_millis'. ( how compiler appears to detect 'systick_uptime_millis' in place of 'millis' is itself a mystery.

   Am beginning to think that the systick.h and systick.c that go with MapleCoOS are maybe too far behind the current release to be adjusted successfully.

   Posted 2 years ago #

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