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labW4barnestr/Inc/delay.h

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+/*
+ * delay.h
+ *
+ * Created on: Dec 10, 2021
+ * Author: Trevor Barnes
+ */
+
+//include guards
+#ifndef DELAY_H_
+#define DELAY_H_
+
+#include <inttypes.h>
+
+#define STK_CTRL (volatile uint32_t*) 0xE000E010
+#define STK_LOAD (volatile uint32_t*) 0xE000E014
+#define STK_VAL (volatile uint32_t*) 0xE000E018
+
+#define EN 1
+#define TICKINT (1<<1)
+#define CLKSOURCE (1<<2)
+#define COUNTFLAG (1<<16)
+
+/*
+ * delay_1ms
+ * 		Busy wait for n ms
+ *
+ * 		For n iterations
+ * 			load number of cycles for 1 ms
+ * 			set one to enable and clock source
+ *
+ * 			wait for countflag to be set
+ */
+void delay_1ms(uint32_t n);
+
+
+
+#endif /* DELAY_H_ */