PT2314_C.rar_PT23_pt2314_pt2314电路_单片机pt2314_遥控音量

//************************************** //************************************** 音量IC 2314 子程序 //************************************** void start2314() { p_2314_scl = 1; p_2314_sda = 1; _nop_(); p_2314_sda = 0; delay(); p_2314_scl = 0; } void clock2314() { _nop_(); p_2314_scl = 1; delay(); p_2314_scl = 0; _nop_(); } ss(){} void stop2314(void) { p_2314_sda = 0; _nop_(); p_2314_scl = 1; delay(); p_2314_sda = 1; } void send_2314_8bit(unsigned char s) { unsigned char data i; for(i=9;i>0;i--) { p_2314_sda=(bit)(s & 0x80); s *=2; clock2314(); } // p_2314_sda=1; } //s(){} void pt2314(void) { unsigned char data i; unsigned char code tone_tab[]={0,0x1,0x2,0x3,0x4,0x5,0x6,0x7, 0x0e,0x0d,0x0c,0x0b,0x0a,0x9}; //unsigned char *p; //p=&tone_tab[0]; start2314(); send_2314_8bit(0x88); send_2314_8bit(mute_peg==1? 0x3f: vol_mem&0x3f); send_2314_8bit(L_mem|0xc0); send_2314_8bit(R_mem|0xe0); switch(input_mem) { case aux_code: i=0x5f; //in4 0db break; case aux1_code: i=0x5c; //in0 0db break; case aux2_code: i=0x5e; //in3 0db break; case usb_code: i=0x55; //in2 3.75db break; case tuner_code: i=0x4d; //in2 7.5db break; // default: // ; } if(loud_peg ==0) i = i | 0x04; send_2314_8bit(i); send_2314_8bit(tone_tab[tre_mem]|0x70); send_2314_8bit(tone_tab[bas_mem]|0x60); stop2314(); } void pt2314_setup(void) { input_mem = aux_code; vol_mem = 0x1c; tre_mem = 0x07; bas_mem = 0x08; L_mem=R_mem = 0; start2314(); send_2314_8bit(0x88); send_2314_8bit(0xc0); send_2314_8bit(0xe0); stop2314(); delay560us(); pt2314(); }