From 02168c8615b38b24030018b8e678fde18f391228 Mon Sep 17 00:00:00 2001
From: Birte Kristina Friesel <birte.friesel@uos.de>
Date: Wed, 21 Feb 2024 14:50:06 +0100
Subject: [PATCH] stm32f7: slightly un-break delay_us and delay_ms
---
src/arch/stm32f746zg-nucleo/arch.cc | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/src/arch/stm32f746zg-nucleo/arch.cc b/src/arch/stm32f746zg-nucleo/arch.cc
index 443a2cf..5f9b53b 100644
--- a/src/arch/stm32f746zg-nucleo/arch.cc
+++ b/src/arch/stm32f746zg-nucleo/arch.cc
@@ -64,19 +64,21 @@ extern void loop();
volatile char run_loop = 0;
#endif
-// for 216 MHz(?)
+static volatile int delay_counter;
+// horribly broken
void Arch::delay_us(unsigned int const us)
{
- volatile int x = us * 145;
- while (x--) {
+ delay_counter = us * 37;
+ while (delay_counter--) {
__asm("nop");
}
}
+// horribly broken
void Arch::delay_ms(unsigned int const ms)
{
for (unsigned int i = 0; i < ms; i++) {
- volatile int x = 143990;
- while (x--) {
+ delay_counter = 36364;
+ while (delay_counter--) {
__asm("nop");
}
}
--
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