45 lines
780 B
C
45 lines
780 B
C
/*
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* delay.h
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*
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* Author: Trevor Barnes
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*/
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//include guards
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#ifndef DELAY_H_
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#define DELAY_H_
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#define STK_CTRL (volatile uint32_t*) 0xE000E010
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#define STK_LOAD (volatile uint32_t*) 0xE000E014
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#define STK_VAL (volatile uint32_t*) 0xE000E018
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#define EN 1
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#define TICKINT (1<<1)
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#define CLKSOURCE (1<<2)
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#define COUNTFLAG (1<<16)
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/*
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* delay_ms
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* Busy wait for n ms
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*
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* For n iterations
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* load number of cycles for 1 ms
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* set one to enable and clock source
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*
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* wait for countflag to be set
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*/
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void delay_ms(uint32_t n);
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/*
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* delay_ms
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* Busy wait for n us
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*
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* For n iterations
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* load number of cycles for 1 us
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* set one to enable and clock source
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*
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* wait for countflag to be set
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*/
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void delay_us(uint32_t n);
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#endif /* DELAY_H_ */
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