From ab5b2c61e6925b03a69bc9ac7f9b9013737d3c29 Mon Sep 17 00:00:00 2001
From: fruchti <fruchti@gvfr.de>
Date: Sat, 26 Dec 2020 11:45:20 +0100
Subject: [PATCH] Add clock frequency definitions

---
 stm32f103c8t6/src/clock.h | 6 ++++++
 stm32f103c8t6/src/main.c  | 4 ++++
 stm32f103c8t6/src/main.h  | 1 +
 3 files changed, 11 insertions(+)
 create mode 100644 stm32f103c8t6/src/clock.h

diff --git a/stm32f103c8t6/src/clock.h b/stm32f103c8t6/src/clock.h
new file mode 100644
index 0000000..80e3cb9
--- /dev/null
+++ b/stm32f103c8t6/src/clock.h
@@ -0,0 +1,6 @@
+#pragma once
+
+#define CLOCK_APB1              36000000
+#define CLOCK_APB2              72000000
+#define CLOCK_SYSCLK            72000000
+#define CLOCK_AHB               72000000
diff --git a/stm32f103c8t6/src/main.c b/stm32f103c8t6/src/main.c
index a79f57f..29b159b 100644
--- a/stm32f103c8t6/src/main.c
+++ b/stm32f103c8t6/src/main.c
@@ -24,6 +24,10 @@ static void Clock_Init(void)
     // Resulting clocks:
     // SYSCLK, AHB, APB2 72 Mhz
     // APB1, ADC 36 MHz
+#if (CLOCK_SYSCLK != 72000000) || (CLOCK_AHB != 72000000) \
+    || (CLOCK_APB1 != 36000000) || (CLOCK_APB2 != 72000000)
+#error Clock initialisation does not match definitions in clock.h.
+#endif
 
     // Disable all interrupts
     RCC->CIR = 0x00000000;
diff --git a/stm32f103c8t6/src/main.h b/stm32f103c8t6/src/main.h
index 82ce17b..ee37535 100644
--- a/stm32f103c8t6/src/main.h
+++ b/stm32f103c8t6/src/main.h
@@ -2,6 +2,7 @@
 
 #include <stdbool.h>
 #include "stm32f1xx.h"
+#include "clock.h"
 #include "pinning.h"
 #include "buildid.h"
 #include "debug.h"