Wip #75
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Wip #75
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This adds a very basic support for a MCU with STM32-compatible peripherals and a 32-bit RISC-V core. Loosely based on based on arm-stm32f2013. The peripheral driver library has a somewhat different interface though. Tested by blinking a led on a Polos Alef R1 board, though my friends and family didn't appreciate it nearly as much as I did.
Linking cforth.elf ...
arm-none-eabi-ld: tconsoleio.o:src/platform/arm-ariel/consoleio.c:14:
multiple definition of `dbg_uart_only';
textend.o:src/platform/arm-ariel/extend.c:7: first defined here
make: *** [src/platform/arm-ariel/targets.mk:70: cforth.elf] Error 1
make: Leaving directory '/home/lkundrak/src/cforth/build/arm-ariel'
arm-none-eabi-ld: tconsoleio.o:src/platform/arm-xo-1.75/consoleio.c:322:
multiple definition of `ps2_devices';
textend.o:src/platform/arm-xo-1.75/extend.c:11: first defined here
arm-none-eabi-ld: tconsoleio.o:src/platform/arm-xo-1.75/consoleio.c:21:
multiple definition of `dbg_uart_only';
textend.o:src/platform/arm-xo-1.75/extend.c:18: first defined here
make: *** [src/platform/arm-xo-1.75/targets.mk:68: cforth.elf] Error 1
make: Leaving directory '/home/lkundrak/src/cforth/build/arm-xo-1.75'
…fit in region iram0_0_seg
…d to measure small time increases
There might be problems...
The SDK functions that I was using to setup the GPIOs were incomplete, since they do not configure the pinmux. The fix was to switch to gpio_config(), which does all the right things. One symptom was that, if you say "gpio13 gpio-is-output", subsequent uses of "n gpio13 gpio-pin!" would not necessarily do anything to the pin, because the pin would still be attached to a different functional block.
.. and to use the modern event system.
Probably doesn't matter, but just to be safe...
.. because doing so breaks the first make where the SDK is trying to check out submodules. There is a conflict on a git lock file.
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Added words to measure small time increases and added ICACHE_FLASH_ATTR