28 lines
556 B
C
28 lines
556 B
C
//
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// Low-level routines to read lock and fuse-bytes
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//
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// Copyright (C) 2/2005 Martin Thomas, Kaiserslautern, Germany
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//
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#include "lowlevel.h"
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unsigned char read_fuse_lock(unsigned short addr, unsigned char mode)
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{
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unsigned char retval;
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asm volatile
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(
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"movw r30, %3\n\t" /* Z to addr */ \
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"sts %0, %2\n\t" /* set mode in SPM_REG */ \
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"lpm\n\t" /* load fuse/lock value into r0 */ \
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"mov %1,r0\n\t" /* save return value */ \
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: "=m" (SPM_REG),
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"=r" (retval)
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: "r" (mode),
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"r" (addr)
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: "r30", "r31", "r0"
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);
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return retval;
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}
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