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hal/hal_delay.h

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00001 #ifndef __HAL_DELAY_H
00002 #define __HAL_DELAY_H 
00003 #include "stdint.h"
00004 
00005 /* This function overflows at 65535 us. 
00006  * For Keil C51 compiler, this function is accurate down to 10 us, with deviation of upto 2 us.
00007  *
00008  * For the IAR 8051 C compiler, the function is not as accurate before hitting about 500 us.
00009  * Over this number, it seem to have a deviation of about 5 to 10 us.
00010  */
00011 void delay_us(uint16_t us);
00012 
00013 /* Function for looping "delay_us"
00014  * 
00015  */
00016 void delay_ms(uint16_t ms);
00017 
00018 #define delay_s(x)  delay_ms((uint16_t)1000 * (uint16_t)x)
00019 #endif

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