脉冲计数，脉冲输入，脉冲上跳沿计数器加一，周期脉冲输入-Pulse count, pulse input, pulse on the jump along the counter plus one cycle pulse input

s3c2410利用外部中断对外部脉冲进行计数的裸机程序-s3c2410 use of external interrupt count external pulses bare metal process

Project: Measuring heart rate through fingertip Copyright @ Rajendra Bhatt January 18, 2011 PIC16F628A at 4.0 MHz external clock, MCLR enabled sbit IR_Tx at RA3_bit sbit DD0_Set at RA2_bit sbit DD1_Set at RA1_bit sbit