1 files changed, 79 insertions, 0 deletions
diff --git a/src/arch/lm4f120h5qr-stellaris/arch.cc b/src/arch/lm4f120h5qr-stellaris/arch.cc
new file mode 100644
index 0000000..c87af2f
--- /dev/null
+++ b/src/arch/lm4f120h5qr-stellaris/arch.cc
@@ -0,0 +1,79 @@
+/*
+ * Copyright 2021 Daniel Friesel
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+#include "arch.h"
+
+#ifdef TIMER_S
+#include "driver/uptime.h"
+#endif
+
+extern "C" {
+#include "lm4f_cpp_wrapper.h"
+};
+
+#ifdef __acweaving
+#define __delay_cycles(x)
+#endif
+
+void Arch::setup(void)
+{
+	arch_clock_init();
+#if defined(WITH_LOOP)
+	arch_init_loop();
+#endif
+}
+
+#ifdef WITH_WAKEUP
+extern void wakeup();
+#endif
+
+#if defined(WITH_LOOP)
+extern void loop();
+extern volatile char run_loop;
+#endif
+
+// for 80 MHz
+void Arch::delay_us(unsigned int const us)
+{
+	volatile int x = us * 77;
+	while (x--) {
+		__asm("nop");
+	}
+}
+void Arch::delay_ms(unsigned int const ms)
+{
+	for (unsigned int i = 0; i < ms; i++) {
+		volatile int x = 10000;
+		while (x--) {
+			__asm("nop");
+		}
+	}
+}
+
+void Arch::idle_loop(void)
+{
+	while (1) {
+		__asm__("wfi");
+#ifdef WITH_LOOP
+		if (run_loop) {
+#ifdef TIMER_S
+			uptime.tick_s();
+#endif
+			loop();
+			run_loop = 0;
+		}
+#endif
+	}
+}
+
+void Arch::idle(void)
+{
+	__asm__("wfi");
+#ifdef WITH_WAKEUP
+	wakeup();
+#endif
+}
+
+Arch arch;