adding in support for DSP functionality,

[LokiMetaSmith]

it works but isn't the right way to do it.

This worked for my implementation and is similar to how CMSIS is used in the nRF52 package, the samd implementation adds it under tools, but I wasn't able to get that to work.

adafruit/ArduinoCore-samd#271

Signed-off-by: lawrence kincheloe lawrence.kincheloe@mavericktechok.com

[hathach]

Thank you for your PR. Yeah, you are right, we should better move this to tools like samd. It is much cleaner and easier to update the CMSIS package in the future. I will do the tool configuration with BSP release. To ease the odds, I will separate it into 2 smaller release

• first : migrate current cmsis to tools one like samd
• next: will make use of the dsp and math lib. (you could help with this one after the first release came out).

For now, I will mark this PR as draft as reference for future Note: this can take a bit of time, since I am not focusing on nrf at the moment. Meanwhile please try go on with your fork as walkaround.

[hathach]

note to my self: adafruit/arduino-board-index#69 add cmsis v5 support for SAMD, nRF BSP can re-use this as well.

[hathach]

once 0.22.1 is released, the core will use the cmsis 5.4 from package tool which also include dsp library. However, the ld flags to link libmath haven't enabled just yet, since I think we need to have some testing time before making it to the public.

https://github.com/adafruit/Adafruit_nRF52_Arduino/blob/master/platform.txt#L77

Since I don't use dsp much, please help to enable the ld flag then make an PR when you think it is stable after a period of testing.

[LokiMetaSmith]

got it to compile, I had to include libarm_cortexM4lf_math.a specifically to get it to be linked in. going to work on narrowing down how and why it works next week.

@@ -65,11 +65,11 @@ build.flags.usb= -DUSBCON -DUSE_TINYUSB -DUSB_VID={build.vid} -DUSB_PID={build.p
compiler.c.extra_flags=
compiler.c.elf.extra_flags=
compiler.cpp.extra_flags=
compiler.S.extra_flags=
compiler.ar.extra_flags=
-compiler.libraries.ldflags=
+compiler.libraries.ldflags={runtime.tools.CMSIS-5.4.0.path}/CMSIS/Lib/GCC/libarm_cortexM4lf_math.a
compiler.elf2bin.extra_flags=
compiler.elf2hex.extra_flags=

compiler.arm.cmsis.c.flags="-I{runtime.tools.CMSIS-5.4.0.path}/CMSIS/Core/Include/" "-I{runtime.tools.CMSIS-5.4.0.path}/CMSIS/DSP/Include/"

@@ -80,11 +80,11 @@ compiler.arm.cmsis.ldflags="-L{runtime.tools.CMSIS-5.4.0.path}/CMSIS/Lib/GCC/" -
rtos.path={build.core.path}/freertos
nordic.path={build.core.path}/nordic

build.logger_flags and build.sysview_flags are intentionally empty,

to allow modification via a user's own boards.local.txt or platform.local.txt files.

-build.flags.nrf= -DSOFTDEVICE_PRESENT -DARDUINO_NRF52_ADAFRUIT -DNRF52_SERIES -DDX_CC_TEE -DLFS_NAME_MAX=64 {compiler.optimization_flag} {build.debug_flags} {build.logger_flags} {build.sysview_flags} {compiler.arm.cmsis.c.flags} "-I{nordic.path}" "-I{nordic.path}/nrfx" "-I{nordic.path}/nrfx/hal" "-I{nordic.path}/nrfx/mdk" "-I{nordic.path}/nrfx/soc" "-I{nordic.path}/nrfx/drivers/include" "-I{nordic.path}/nrfx/drivers/src" "-I{nordic.path}/softdevice/{build.sd_name}nrf52{build.sd_version}_API/include" "-I{nordic.path}/softdevice/{build.sd_name}nrf52{build.sd_version}_API/include/nrf52" "-I{rtos.path}/Source/include" "-I{rtos.path}/config" "-I{rtos.path}/portable/GCC/nrf52" "-I{rtos.path}/portable/CMSIS/nrf52" "-I{build.core.path}/sysview/SEGGER" "-I{build.core.path}/sysview/Config" "-I{runtime.platform.path}/libraries/Adafruit_TinyUSB_Arduino/src/arduino"
+build.flags.nrf= -DSOFTDEVICE_PRESENT -DARDUINO_NRF52_ADAFRUIT -DNRF52_SERIES -DDX_CC_TEE -DLFS_NAME_MAX=64 {compiler.optimization_flag} {build.debug_flags} {build.logger_flags} {build.sysview_flags} {compiler.arm.cmsis.c.flags} {compiler.arm.cmsis.ldflags} "-I{nordic.path}" "-I{nordic.path}/nrfx" "-I{nordic.path}/nrfx/hal" "-I{nordic.path}/nrfx/mdk" "-I{nordic.path}/nrfx/soc" "-I{nordic.path}/nrfx/drivers/include" "-I{nordic.path}/nrfx/drivers/src" "-I{nordic.path}/softdevice/{build.sd_name}nrf52{build.sd_version}_API/include" "-I{nordic.path}/softdevice/{build.sd_name}nrf52{build.sd_version}_API/include/nrf52" "-I{rtos.path}/Source/include" "-I{rtos.path}/config" "-I{rtos.path}/portable/GCC/nrf52" "-I{rtos.path}/portable/CMSIS/nrf52" "-I{build.core.path}/sysview/SEGGER" "-I{build.core.path}/sysview/Config" "-I{runtime.platform.path}/libraries/Adafruit_TinyUSB_Arduino/src/arduino"

Compile patterns

----------------

Compile c files

[hathach]

will be implemented as part of #658