b50cdb56de
Update documentation and comments in code to reflect reality. Ensure that GPIO pin output speed is actually set, to ensure that 48Mhz sysclk output is functional. Actually set AF, instead of relying on reset values. Replace the systick code, the core of this example, with some code that has less traps and surprises. Instead of trying to get a direct interrupt x times per second, and reguarly running into problems with the 24 bit counter limit, use a method that triggers an interrupt every x ms instead. Tested MCO and blink rates with a logic analyser, properly verified working now :)
README
This example is the same as fancy_blink except that it uses the systick timer to generate time accurate delays. The blue LED flashes four times per second.
There is internal reference clock available on MCO output pin. This can be used to debug the PLL clock setup by scope.
Board connections
| Port | Function | Description |
|---|---|---|
PA8 |
(MCO) |
Internal reference clock |