ch573.git/src/io.c, branch main Bare-metal Christmas light hacking using the CH573 microcontroller Implement serial input. 2024-12-01T06:55:45+00:00 Josh Rahm joshuarahm@gmail.com 2024-12-01T06:55:45+00:00 7df284ea01ea0015770d626a1eb7ae7f62d48bb3 






System clock is sort of working.
2024-11-18T06:04:11+00:00

Josh Rahm
joshuarahm@gmail.com

2024-11-18T06:04:11+00:00

22c5b3e1dc4e3cf7de3f73ebbf5b59542f207f4b

It appears the frequency divider does not work. I've followed the data
sheet, but no matter what I set the frequency divider to it appears to
not work. It's possible maybe the GPIO is using an un-divided clock, but
I'm not sure.

Also the 32khz clock does not work I think. It might be an issue with
the board. The waveform is jagged and looks awful.

But I can switch from the HSE to the PLL.





It appears the frequency divider does not work. I've followed the data
sheet, but no matter what I set the frequency divider to it appears to
not work. It's possible maybe the GPIO is using an un-divided clock, but
I'm not sure.

Also the 32khz clock does not work I think. It might be an issue with
the board. The waveform is jagged and looks awful.

But I can switch from the HSE to the PLL.







Cleanup and get the program to a basic Hello, World program.
2024-11-16T22:22:24+00:00

Josh Rahm
joshuarahm@gmail.com

2024-11-16T22:22:24+00:00

7d64711cf7cbdf81d5a692044161ddc69e3dc33f

Add separate source file for initializing the uart for stdout.





Add separate source file for initializing the uart for stdout.