* Support disabling UART test configs
* `zig build [install]` also builds .bin files
* Support one blinking LD3 on STM32F3DISCOVERY board
These changes were mostly copied from the stm32f103 already there.
But this is far from complete, many shortcuts were taken:
- Most importantly,
only a single LED on the board, and its port/pin, is supported,
viz. the 'north' LD3 on bit 9 of GPIOE.
- Setting RCC_AHBENR bit IOPEEN ("I/O port E clock enable") is done
at the same as setting the mode (input or output) on one of its pins.
No idea if that is the right place to do this.
- In cortex-m4.zig, using 'max ram' as the initial stack pointer.
The rest is completely copied from cortex-m3.zig.
- UART test is disabled.
(It seems to assume mbed-lpc1768 pin numbers.)
* Nicer initial stack pointer: exactly after RAM
* Fix build error
(How was this code working earlier?!?)
* stm32f30x: Allow all 16 pins, all GPIOx registers
* STM32F3DISCOVERY: map all LED pins
Marnix Klooster
Matt Knight
Vesim
Felix (xq) Queißner