29 lines
513 B
C
29 lines
513 B
C
#include "interface.h"
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#include <stdint.h>
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#include <stdio.h>
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// This targets an ARM Cortex M3 core using QEmu LM3S6965 emulation.
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#define STBASE 0xE000E000
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#define STCTRL (*(volatile uint32_t*)(0x010 + STBASE))
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#define STRELOAD (*(volatile uint32_t*)(0x014 + STBASE))
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#define STCURRENT (*(volatile uint32_t*)(0x018 + STBASE))
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void interface_init()
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{
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STRELOAD = 0x00FFFFFF;
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STCTRL = 5;
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}
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void start_timing()
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{
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STCURRENT = 0;
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}
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uint16_t end_timing()
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{
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return 0x00FFFFFF - STCURRENT - 4;
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}
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