51 single-chip control throttle production programming

#include SBITSPEAKER = P3 ^ 7; UnsignedChardo = 108; unsignedcharbeat_H = (65536-62500) / 256, beat_L () = (65536-62500)% 256; unsignedchartone_H = (65536-1908) / 256, tone_L () = (65536-1908)% 256; chartimes, counts = 5; bitbeat_flag; // ===== TImer0 interrupt subroutine ====================== voidtone_TImer (void) interrupt1 {TH0 = tone_H; TL0 = tone_L; speaker = ~ speaker; } main () {Chari; IE = 0x82; TH0 = beat_H; TL0 = beat_L; for (i = 0; i {TImes = 2; beat_flag = 0; Tr0 = 1; if (beat_flag == 0) {Speaker = ~ speaker; delay8us (tone [Do]);} // === mute (1/4 beat) ===================================== speaker = 0; TImes = 2; beat_flag = 0; Tr0 = 1; while (beat_flag = 0); } } // ================================================ ====== voidbeat_timer (void) interrupt1 {TH0 = beat_H; TL0 = beat_L; if (- times == 0) {Beat_flag = 1; Tr0 = 0; } } // ============================================ voiddelay8us (unsignedcharx) {Unsignedchari, j; for (i = 0; ifor (j = 0; j "1; j ++); }, Read the full text

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