From 689c2f9baf835b55cdbb68d78b0913d8ca6df317 Mon Sep 17 00:00:00 2001
From: Arksine <9563098+Arksine@users.noreply.github.com>
Date: Sat, 3 Apr 2021 06:54:07 -0400
Subject: [PATCH] stm32f1: reset peripherals in enable_pcclock()
Some bootloaders do not disable peripherals in use before jumping to the application. Reset peripherals to assure correct operation.
SIgned-off-by: Eric Callahan <arksine.code@gmail.com>
---
src/stm32/stm32f1.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/stm32/stm32f1.c b/src/stm32/stm32f1.c
index ae8fcd679..34c28573e 100644
--- a/src/stm32/stm32f1.c
+++ b/src/stm32/stm32f1.c
@@ -21,10 +21,14 @@ enable_pclock(uint32_t periph_base)
uint32_t pos = (periph_base - APB1PERIPH_BASE) / 0x400;
RCC->APB1ENR |= (1<<pos);
RCC->APB1ENR;
+ RCC->APB1RSTR |= (1<<pos);
+ RCC->APB1RSTR &= ~(1<<pos);
} else if (periph_base < AHBPERIPH_BASE) {
uint32_t pos = (periph_base - APB2PERIPH_BASE) / 0x400;
RCC->APB2ENR |= (1<<pos);
RCC->APB2ENR;
+ RCC->APB2RSTR |= (1<<pos);
+ RCC->APB2RSTR &= ~(1<<pos);
} else {
uint32_t pos = (periph_base - AHBPERIPH_BASE) / 0x400;
RCC->AHBENR |= (1<<pos);