From 22c5b3e1dc4e3cf7de3f73ebbf5b59542f207f4b Mon Sep 17 00:00:00 2001 From: Josh Rahm Date: Sun, 17 Nov 2024 23:04:11 -0700 Subject: System clock is sort of working. 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. --- include/system.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 include/system.h (limited to 'include/system.h') diff --git a/include/system.h b/include/system.h new file mode 100644 index 0000000..ca29ade --- /dev/null +++ b/include/system.h @@ -0,0 +1,14 @@ +#pragma once + +#include + +#define SAFE_ACCESS_SIG_REG (*((volatile uint32_t*)0x40001040)) + +#define SAFE_ACCESS_1 0x57 +#define SAFE_ACCESS_2 0xA8 + +inline static void enter_safe_mode() +{ + SAFE_ACCESS_SIG_REG = SAFE_ACCESS_1; + SAFE_ACCESS_SIG_REG = SAFE_ACCESS_2; +} -- cgit