From 8458978ad5512dc813ac700d59983c56917fa205 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Sun, 26 Jul 2020 11:55:32 +0200
Subject: Add minimal STM32F446RE Nucleo support. No interrupts yet.

---
 src/arch/stm32f446re-nucleo/arch.cc | 54 +++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/arch/stm32f446re-nucleo/arch.cc

(limited to 'src/arch/stm32f446re-nucleo/arch.cc')

diff --git a/src/arch/stm32f446re-nucleo/arch.cc b/src/arch/stm32f446re-nucleo/arch.cc
new file mode 100644
index 0000000..12a612a
--- /dev/null
+++ b/src/arch/stm32f446re-nucleo/arch.cc
@@ -0,0 +1,54 @@
+#include "arch.h"
+
+#ifdef __acweaving
+#define __delay_cycles(x)
+#endif
+
+void Arch::setup(void)
+{
+}
+
+#ifdef WITH_WAKEUP
+extern void wakeup();
+#endif
+
+#if defined(WITH_LOOP)
+extern void loop();
+volatile char run_loop = 0;
+#endif
+
+void Arch::delay_us(unsigned int const us)
+{
+	volatile int x = us * 2;
+	while (x--) {
+		__asm("nop");
+	}
+}
+void Arch::delay_ms(unsigned int const ms)
+{
+	for (unsigned int i = 0; i < ms; i++) {
+		volatile int x = 2000;
+		while (x--) {
+			__asm("nop");
+		}
+	}
+}
+
+void Arch::idle_loop(void)
+{
+	while (1) {
+		delay_ms(1000);
+#ifdef WITH_LOOP
+		loop();
+#endif
+	}
+}
+
+void Arch::idle(void)
+{
+#ifdef WITH_WAKEUP
+	wakeup();
+#endif
+}
+
+Arch arch;
-- 
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