;MP3 Player kunio.h Ver1.0 H15.8.17 ;**** includes **** .include "m8def.inc" ; Load immediate word into the resister pair. ; ldiw Z(X,Y),var .macro ldiw ldi @0L,low(@1) ldi @0H,high(@1) .endm ; Output immediate outi port,var .macro outi ldi r16,@1 out @0,r16 .endm .MACRO cpi16 ;cpi16 ra,rb,0xHHHH ;ra:rb-0xHHHH set flags:N,C,Z push @0 push @1 subi @1,low(@2) sbci @0,high(@2) pop @1 pop @0 .ENDMACRO .MACRO addi16 ;addi16 ra,rb,0xHHHH subi @1,low(-@2) sbci @0,high(-@2) .ENDMACRO ;***************************** ;* レジスタ変数　設定 * ;***************************** .def temp1 = r16 .def temp2 = r17 .def temp3 = r18 .def temp4 = r19 .def lcd_data= r23 ;***************************** ;*　 ビット　設定　　* ;***************************** ;** PORTB *** .equ sw_0 = 0 .equ sw_1 = 1 .equ sd_cs = 2 ;SS .equ sd_in = 3 ;MOSI .equ sd_out = 4 ;MISO .equ sd_clk = 5 ;SCK .equ sw_6 = 6 .equ p_hold = 7 ;power hold & MP3~reset ;** PORTD ** .equ mp3_dreq= 0 .equ lcd_rs = 1 .equ lcd_rw = 2 .equ lcd_enb = 3 .equ lcd_db4 = 4 .equ lcd_db5 = 5 .equ lcd_db6 = 6 .equ lcd_db7 = 7 .equ mp3_so = 7 ;** PORTC *** .equ v_in = 0 ;batt volt .equ mp3_si = 1 .equ mp3_sclk= 2 .equ mp3_cs = 3 .equ mp3_bsync= 4 .equ mp3_dclk = 5 ;key_in 76543210 .equ key_stop = 0b00000011 .equ key_ff = 0b00000001 .equ key_rew = 0b01000001 .equ key_vp = 0b01000000 .equ key_vm = 0b01000010 .dseg fattype: .BYTE 1 ;FAT16:1,FAT12:0 datastart: .BYTE 4 ;DATAstart[3:0] dirstart: .BYTE 2 ;DIRstart[1:0] secpcl: .BYTE 1 ;sectorspercluster fatstart: .BYTE 2 ;FATstart[1:0] rdirent: .BYTE 2 ;rootdirentriescount[1:0] spi_arg: .BYTE 5 ;cmd,arg[3:0] read32_arg: .BYTE 4 ;adr[3:0] musiccount: .BYTE 1 ;MP3 file count playmusic: .BYTE 1 ;play music count musicsize: .BYTE 4 ;play file size cluster: .BYTE 2 ;play cluster remainsec: .BYTE 2 ;play remain sector buff: .BYTE 32 ;buff[31:0] fatcache: .BYTE 512 ;FATcache fatsec: .BYTE 3 ;FATcache'sector volume: .BYTE 1 key_in: .BYTE 1 key_input: .BYTE 1 key_c: .BYTE 1 vol_t: .BYTE 1 v_t: .BYTE 2 play_time: .BYTE 2 ;PLAY TIME SAVE id3: .BYTE 128 ;TAG V1 .eseg ;EEPROM rom_pm: .BYTE 1 ;play music rom_cl: .BYTE 2 ;cluster rom_re: .BYTE 2 ;remainsec rom_mu: .BYTE 3 ;musicsize rom_pt: .BYTE 2 ;play_time rom_vo: .BYTE 1 ;volume .cseg ;********************* ;* 割込みベクター * ;********************* rjmp start ;各種ﾘｾｯﾄ reti ;RJMP EXT_INT0 ;外部割り込み要求0 reti ;EXT_INT1 ;外部割り込み要求1 reti ;TIM2_COMP ;ﾀｲﾏ/ｶｳﾝﾀ2 比較一致 reti ;TIM2_OVF ;ﾀｲﾏ/ｶｳﾝﾀ2 ｵｰﾊﾞｰﾌﾛｰ reti ;TIM1_CAPT ;ﾀｲﾏ/ｶｳﾝﾀ1 ｷｬﾌﾟﾁｬ発生 reti ;TIM1_COMPA ;ﾀｲﾏ/ｶｳﾝﾀ1 比較A 一致 reti ;TIM1_COMPB ;ﾀｲﾏ/ｶｳﾝﾀ1 比較B 一致 reti ;TIM1_OVF ;ﾀｲﾏ/ｶｳﾝﾀ1 ｵｰﾊﾞｰﾌﾛｰ reti ;TIM0_OVF ;ﾀｲﾏ/ｶｳﾝﾀ0 ｵｰﾊﾞｰﾌﾛｰ reti ;SPI_STC ;SPI 転送完了 reti ;USART_RXC ;USART 受信完了 reti ;USART_DRE ;USART 送信ﾊﾞｯﾌｧ空 reti ;USART_TXC ;USART 送信完了 reti ;ADC_E ;ADC 変換完了 reti ;EE_RDY ;EEPROM 操作可 reti ; ANA_COMP ;ｱﾅﾛｸﾞ ｺﾝﾊﾟﾚｰﾀ出力遷移 reti ;TWSI ;2 線式ｼﾘｱﾙ ｲﾝﾀｰﾌｪｰｽ状態変化 reti ;SPM_RDY ;SPM 命令操作可 ;clk_ck: ;内部OSCﾁｪｯｸ用(clk/8)　不使用 ; cbi PORTB,6 ; nop ; nop ;2 clocks ; sbi PORTB,6 ; rjmp clk_ck ;2 clocks ;********************* ;* メイン プログラム * ;********************* start: ldi temp1,low(RAMEND) out SPL,temp1 ldi temp1,high(RAMEND) out SPH,temp1 ;init Stack Pointer ldi temp1,0x88 ; out OSCCAL,temp1 ldi temp1,(1< 4M cpi temp2,0xFF brne main_1 ldiw z,sd_err*2 rcall lcd_dat_dsp rjmp loop main_1: rcall read_vfat tst temp2 breq main_2 ldiw z,fat_err*2 rcall lcd_dat_dsp rjmp loop main_2: ldi temp1,0xff rcall search_mp3;temp2 <- MP3 count tst temp2 brne main_3 ldiw z,no_mp3*2 rcall lcd_dat_dsp rjmp loop main_3: sts musiccount,temp2 ;music count lds temp1,playmusic tst temp1 brne main_4 ldi temp1,1 sts playmusic,temp1 main_4: rcall search_mp3 ;sarch temp1 MP3 lds temp1,buff+28 lds temp2,musicsize cp temp1,temp2 brne main_5 lds temp1,buff+29 lds temp2,musicsize+1 cp temp1,temp2 brne main_5 lds temp1,buff+30 lds temp2,musicsize+2 cp temp1,temp2 brne main_5 ; lds temp1,buff+31 ; lds temp2,musicsize+3 ; cp temp1,temp2 ; brne main_5 rjmp play main_5: ldi temp1,1 sts playmusic,temp1 clr temp2 sts cluster,temp2 sts cluster+1,temp2 play: rcall v_read cpi16 zH,zL,220 ;about 2.2V down brcc play0 ;beep ldi temp1,3 mov r0,temp1 ldi temp1,1 mov r1,temp1 rcall beep ;high 3times play0: rcall v_dsp ldi temp1,255 sts vol_t,temp1 lds temp1,playmusic lds temp2,musiccount cp temp2,temp1 brpl play_1 ;files => play_No ldi temp1,1 ; < sts playmusic,temp1 play_1: rcall play_mp3 ;arg=playmusic(temp1),cluster,remainsec tst temp2 breq play_3 brpl play_2 ldiw z,mp3_err*2 rcall lcd_dat_dsp rjmp loop play_2: ldi temp1,4 rcall mp3_read lds temp1,play_time lds temp2,play_time+1 add r0,temp1 adc r1,temp2 sts play_time,r0 sts play_time+1,r1 clr r1 inc r1 mov r0,r1 rcall beep ;high 1time lds r20,key_input cpi r20,key_ff breq play_3 cpi r20,key_rew breq play_rew cpi r20,key_stop breq play_stop lds temp1,playmusic ;key_input=error? rjmp play_1 ; play_3:;(ff) lds temp1,playmusic inc temp1 sts playmusic,temp1 clr temp2 sts cluster,temp2 sts cluster+1,temp2 rjmp play play_rew: lds temp1,playmusic dec temp1 brne play_rew1 lds temp1,musiccount play_rew1: sts playmusic,temp1 clr temp2 sts cluster,temp2 sts cluster+1,temp2 rjmp play play_stop: lds temp1,play_time ldiw z,rom_pt rcall EEPROM_WR lds temp1,play_time+1 ldiw z,rom_pt+1 rcall EEPROM_WR lds temp1,playmusic ldiw z,rom_pm rcall EEPROM_WR mov temp1,r10 ldiw z,rom_cl rcall EEPROM_WR mov temp1,r11 ldiw z,rom_cl+1 rcall EEPROM_WR ldi temp1,5 sub temp1,r3 clr temp2 add temp1,r8 adc r9,temp2 ldiw z,rom_re rcall EEPROM_WR mov temp1,r9 ldiw z,rom_re+1 rcall EEPROM_WR lds temp1,musicsize ldiw z,rom_mu rcall EEPROM_WR lds temp1,musicsize+1 ldiw z,rom_mu+1 rcall EEPROM_WR lds temp1,musicsize+2 ldiw z,rom_mu+2 rcall EEPROM_WR lds temp1,volume ldiw z,rom_vo rcall EEPROM_WR ldiw z,shut_down*2 rcall lcd_dat_dsp play_stop0: ; rcall mp3_int ldi temp1,0 ldi temp2,0 ldi temp3,0x10 rcall mp3_cmd ;0,0x0010 power down ldi temp1,200 rcall wait_ms ldi temp1,200 rcall wait_ms cbi PORTB,p_hold ;power down play_stop1: rjmp play_stop1 ;********************************************** loop: ldi temp1,10 mov r0,temp1 clr r1 inc r1 rcall beep loop1: rjmp play_stop0 ;********************************************** ;play_MP3 ;arg=playmusic(temp1),cluster,remainsec play_mp3: rcall search_mp3 ;return=temp2 lds temp1,playmusic ; cp temp1,temp2 breq p_mp3_1 ldi temp2,-1 ret p_mp3_1: lds r12,buff+28 lds r13,buff+29 lds r14,buff+30 lds r15,buff+31 ;musicsize=r15:14:13:12 tst r15 breq p_mp3_2 ;filesize < $FFFFFF(16MB) ldi temp2,-9 ; >= ret p_mp3_2: sts musicsize,r12 sts musicsize+1,r13 sts musicsize+2,r14 lds r10,buff+26 ;play start top lds r11,buff+27 ;cluster=r11:10 clr temp3 ;r14:13:12/512=r9:8 (remainsec) mov temp2,r14 ;r14:13:12 mod 512=r7:6(remain　byte) mov temp1,r13 lsr temp2 ror temp1 brcc p_mp3_21 ;carry_flag =0 ldi temp3,1 ; =1 p_mp3_21: mov r8,temp1 mov r9,temp2 mov r6,r12 mov r7,temp3 push r9 push r8 lds r3,secpcl rcall tagv1 ldiw x,id3 ld temp1,x+ cpi temp1,'T' brne p_mp3_5n ld temp1,x+ cpi temp1,'A' brne p_mp3_5n ld temp1,x+ cpi temp1,'G' breq p_mp3_6 p_mp3_5n: ldiw z,no_tag*2 rcall lcd_dat_dsp rjmp p_mp3_8 p_mp3_6: ldi lcd_data,0x80 rcall lcd_cmd p_mp3_61: ld lcd_data,x+ rcall str_ck rcall lcd_dsp cpi16 xH,xL,id3+19 brne p_mp3_61 ldiw x,id3+33 ldi lcd_data,0xC0 rcall lcd_cmd p_mp3_7: ld lcd_data,x+ rcall str_ck rcall lcd_dsp cpi16 xH,xL,id3+43 brne p_mp3_7 p_mp3_8: pop r8 pop r9 lds r10,buff+26 lds r11,buff+27 lds temp1,cluster lds temp2,cluster+1 clr temp3 or temp3,temp1 or temp3,temp2 brne p_mp3_29 sts cluster,r10 sts cluster+1,r11 sts remainsec,r8 sts remainsec+1,r9 clr temp1 sts play_time,temp1 sts play_time+1,temp1 rjmp p_mp3_3 p_mp3_29: mov r10,temp1 ;play cont mov r11,temp2 ; lds r8,remainsec lds r9,remainsec+1 p_mp3_3: mov temp1,r10 and temp1,r11 ;r11:10=0xFFFF? cpi temp1,0xFF breq p_mp3_4 tst r11 brne p_mp3_5 ldi temp1,2 cp r10,temp1 brcc p_mp3_5 p_mp3_4: ldi temp2,-2 ret p_mp3_5: ; lds r10,cluster ; lds r11,cluster+1 ; lds r8,remainsec ; lds r9,remainsec+1 rcall sec_addr_set rcall mp3_int clr temp1 sts key_c,temp1 sts key_in,temp1 p_mp3_9: ldi temp1,1 clr temp2 sub r8,temp1 sbc r9,temp2 brcc p_mp3_91 rjmp p_mp3_30 p_mp3_91: sts spi_arg+1,r15 sts spi_arg+2,r14 sts spi_arg+3,r13 sts spi_arg+4,r12 rcall spi_read_open ldi temp1,0xff rcall spi_out ;first byte ldiw y,0 p_mp3_09: sbic PIND,mp3_dreq rjmp p_mp3_09n rcall Interrupt tst r20 brmi p_mp3_09 p_mp3_090: in temp4,SPDR outi SPDR,0xff adiw yL,1 cpi yH,0x02 breq p_mp3_092 p_mp3_091: sbis SPSR,SPIF rjmp p_mp3_091 rjmp p_mp3_090 p_mp3_092: rcall spi_read_close mov temp2,r20 ret p_mp3_09n: in temp4,SPDR outi SPDR,0xff sbi PORTC,mp3_bsync ldi r20,8 p_mp3_10: lsl temp4 brcc p_mp3_11 sbi PORTC,mp3_si rjmp p_mp3_12 p_mp3_11: cbi PORTC,mp3_si nop p_mp3_12: sbi PORTC,mp3_dclk dec r20 cbi PORTC,mp3_dclk cbi PORTC,mp3_bsync brne p_mp3_10 adiw yL,1 cpi yH,0x02 ;y=512(0x0200)? brne p_mp3_09 rcall spi_read_close dec r3 breq p_mp3_20 ldi temp1,0x02 clr temp2 add r13,temp1 adc r14,temp2 adc r15,temp2 rjmp p_mp3_9 p_mp3_20: rcall next_cluster ;cluster=r11:10,return=r5:4 mov r10,r4 mov r11,r5 lds r3,secpcl rcall sec_addr_set rjmp p_mp3_9 p_mp3_30: mov temp1,r6 or temp1,r7 brne p_mp3_31 clr temp2 ret ;remain btye=0 p_mp3_31: sts spi_arg+1,r15 sts spi_arg+2,r14 sts spi_arg+3,r13 sts spi_arg+4,r12 rcall spi_read_open ldi temp1,0xff rcall spi_out ;first byte ldiw y,0 p_mp3_40: sbic PIND,mp3_dreq rjmp p_mp3_40n rcall Interrupt tst r20 brmi p_mp3_40 p_mp3_400: in temp4,SPDR outi SPDR,0xff adiw yL,1 cpi yH,0x02 breq p_mp3_402 p_mp3_401: sbis SPSR,SPIF rjmp p_mp3_401 rjmp p_mp3_400 p_mp3_402: rcall spi_read_close mov temp2,r20 ret p_mp3_40n: in temp4,SPDR outi SPDR,0xff cp yL,r6 cpc yH,r7 brcc p_mp3_50 sbi PORTC,mp3_bsync ldi r20,8 p_mp3_41: lsl temp4 brcc p_mp3_42 sbi PORTC,mp3_si rjmp p_mp3_43 p_mp3_42: cbi PORTC,mp3_si nop p_mp3_43: sbi PORTC,mp3_dclk dec r20 cbi PORTC,mp3_dclk cbi PORTC,mp3_bsync brne p_mp3_41 p_mp3_50: adiw yL,1 cpi yH,0x02 brne p_mp3_40 rcall spi_read_close clr temp2 ret ;********************************************** Interrupt: ;割り込み処理　10ms(80000ck）以下 lds zL,v_t lds zH,v_t+1 sbiw zL,1 breq inter95 inter94: sts v_t,zL sts v_t+1,zH rjmp inter96 inter95: ldi temp1,6 sts v_t,temp1 ldi temp1,0 sts v_t+1,temp1 rcall v_read cpi16 zH,zL,200 brcc inter96 ldi temp1,3 rcall wait_ms rcall v_read cpi16 zH,zL,200 brcc inter96 ldi temp1,4 rcall mp3_read lds temp1,play_time lds temp2,play_time+1 add r0,temp1 adc r1,temp2 sts play_time,r0 sts play_time+1,r1 ldi r23,0xc0 rcall lcd_dsp ldiw z,batt_low*2 rcall lcd_dat_dsp1 ldi temp1,10 mov r0,temp1 clr r1 rcall beep ;low 10times ldi temp1,key_stop sts key_input,temp1 ldi r20,3 ret ;shut down mode inter96: ldi temp1,3 rcall wait_ms lds temp1,vol_t dec temp1 sts vol_t,temp1 brne inter97 inc temp1 sts vol_t,temp1 rcall time_dsp inter97: in temp4,PINB ;key ck andi temp4,0b01000011 cpi temp4,0b01000011 breq inter98 lds temp1,key_in cp temp1,temp4 breq inter0 inter98: sts key_in,temp4 clr temp1 sts key_c,temp1 inter99: ldi r20,-1 ret inter0: lds temp4,key_c inc temp4 cpi temp4,25 breq inter01 sts key_c,temp4 rjmp inter99 inter01: sts key_input,temp1 clr temp4 sts key_in,temp4 sts key_c,temp4 cpi temp1,key_vp brne inter1 lds temp2,volume subi temp2,4 cpi temp2,0x12 brcc inter_vol ldi temp2,0x12 rjmp inter_vol inter1: cpi temp1,key_vm brne inter2 lds temp2,volume subi temp2,-4 cpi temp2,0x8A brcs inter_vol ldi temp2,0x8A rjmp inter_vol inter2: cpi temp1,key_ff brne inter3 ldi r20,1 ret inter3: cpi temp1,key_rew brne inter4 ldi r20,2 ret inter4: cpi temp1,key_stop brne inter99 ldi temp1,150 rcall wait_ms in temp4,PINB ;key ck andi temp4,0b01000011 cpi temp4,key_stop breq inter_stop ldi temp1,100 rcall wait_ms ldi r23,0xCA rcall lcd_cmd ldiw z,pause*2 rcall lcd_dat_dsp1 inter_wait: in temp4,PINB ;key ck andi temp4,0b01000011 cpi temp4,key_stop brne inter_wait ldi temp1,30 rcall wait_ms in temp4,PINB ;key ck andi temp4,0b01000011 cpi temp4,key_stop brne inter_wait rcall time_dsp ldi r20,-1 ret inter_stop: ldi r20,3 ret inter_vol: sts volume,temp2 ldi temp1,11 mov temp3,temp2 rcall mp3_cmd rcall vol_dsp ldi r20,-1 ret ;********************************************** time_dsp: ldi temp1,4 rcall mp3_read ldi r23,0xCA rcall lcd_cmd ldi r23,' ' rcall lcd_dsp lds temp1,play_time lds temp2,play_time+1 add temp1,r0 adc temp2,r1 min: clr r22 clr r21 clr r20 clr r19 min0: cpi16 temp2,temp1,60 brmi sec0 subi temp1,60 sbci temp2,0 inc r21 rjmp min0 sec0: cpi temp1,10 brmi sec1 subi temp1,10 inc r20 rjmp sec0 sec1: mov r19,temp1 mov temp1,r21 min1: cpi temp1,10 brmi min2 subi temp1,10 inc r22 rjmp min1 min2: mov r0,r22 mov r1,temp1 rcall bindec2 ldi r23,':' rcall lcd_dsp mov r0,r20 mov r1,r19 rcall bindec2 ret ;********************************************** vol_dsp: ldi r23,0xCA rcall lcd_cmd ldiw z,vol*2 rcall lcd_dat_dsp1 lds temp3,volume vol_dsp0: ldi temp2,0x8A sub temp2,temp3 lsr temp2 lsr temp2 clr r0 clr r1 bindec: cpi temp2,10 brmi bindec1 subi temp2,10 inc r0 rjmp bindec bindec1: mov r1,temp2 bindec2: mov r23,r0 subi r23,-48 rcall lcd_dsp mov r23,r1 subi r23,-48 rcall lcd_dsp ldi temp1,255 sts vol_t,temp1 ret ;********************************************** v_read: sbi ADCSR,ADEN ;adc on sbi ADCSR,ADIF ; Reset interrupt flag sbi ADCSR,ADSC ; Start A/D conversion v_read1: sbis ADCSR,ADIF rjmp v_read1 in zL,ADCL ; in zH,ADCH ; cbi ADCSR,ADEN ;adc off lsr zH ;V/2:256=X:1024 ror zL ;V=X/2 (uint0.01V) ret v_dsp: ldi r23,0xCA rcall lcd_cmd ldi r23,'V' rcall lcd_dsp ldi r23,':' rcall lcd_dsp ldi r23,0x30 v_read2: cpi16 zH,zL,100 brmi v_read3 subi zL,100 sbci zH,0 inc r23 rjmp v_read2 v_read3: rcall lcd_dsp ldi r23,'.' rcall lcd_dsp ldi r23,0x30 v_read4: cpi zL,10 brmi v_read5 subi zL,10 inc r23 rjmp v_read4 v_read5: rcall lcd_dsp ldi r23,0x30 add r23,zL rcall lcd_dsp ret ;********************************************** str_ck: ;特殊文字を空白にする cpi lcd_data,0x20 brcs str_ck1 cpi lcd_data,0xE0 brcc str_ck1 cpi lcd_data,0xA0 brcc str_ck2 cpi lcd_data,0x80 brcs str_ck2 str_ck1: ldi lcd_data,' ' str_ck2: ret ;********************************************** mp3_int: sbis PIND,mp3_dreq rjmp mp3_int ldi temp1,5 rcall wait_ms ldi temp1,0 ldi temp2,0 ldi temp3,4 rcall mp3_cmd ;0,0x0004 ;cmd=temp1,arg[H:L]=temp2:temp3 ldi temp1,10 rcall wait_us ldi temp1,0 ldi temp2,0 ldi temp3,0 rcall mp3_cmd ;0,0x0000 mp3_int1: sbis PIND,mp3_dreq rjmp mp3_int1 ldi temp1,3 ldi temp2,0x9B ldi temp3,0xF7 ;0x8000+14318180/2000 rcall mp3_cmd ;3,0x9bF7 ldi temp1,11 lds temp2,volume mov temp3,temp2 rcall mp3_cmd ;11,left/right ldi temp1,1 rcall wait_ms ldiw z,mp3_0*2 rcall mp3_sin ret ;********************************************** mp3_read: ;addr=temp1 ret:data=r1:r0 cbi DDRD,mp3_so ;input sbi PORTD,mp3_so ;pull up clr r1 clr r0 ldi r21,16 cbi PORTC,mp3_cs ldi temp4,3 rcall mp3_write mov temp4,temp1 rcall mp3_write mp3_read1: sbi PORTC,mp3_sclk nop sbis PIND,mp3_so rjmp mp3_read2 sec rjmp mp3_read3 mp3_read2: clc mp3_read3: rol r0 rol r1 cbi PORTC,mp3_sclk dec r21 brne mp3_read1 sbi PORTC,mp3_cs sbi DDRD,mp3_so ;output cbi PORTD,mp3_so ;clear ret ;********************************************** mp3_cmd: ;com=temp1,arg=temp2:3 cbi PORTC,mp3_cs ldi temp4,2 rcall mp3_write mov temp4,temp1 rcall mp3_write mov temp4,temp2 rcall mp3_write mov temp4,temp3 rcall mp3_write sbi PORTC,mp3_cs ret ;********************************************** mp3_write: ;data=temp4 ldi r20,8 mp3_write_0: lsl temp4 brcc mp3_write_1 sbi PORTC,mp3_si rjmp mp3_write_2 mp3_write_1: cbi PORTC,mp3_si nop mp3_write_2: sbi PORTC,mp3_sclk dec r20 cbi PORTC,mp3_sclk brne mp3_write_0 ret ;********************************************** mp3_sin: ;data_addr Z ldi r21,8 mp3_sin_0: sbis PIND,mp3_dreq rjmp mp3_sin_0 lpm temp4,z+ sbi PORTC,mp3_bsync ldi r20,8 mp3_sin_1: lsl temp4 brcc mp3_sin_2 sbi PORTC,mp3_si rjmp mp3_sin_3 mp3_sin_2: cbi PORTC,mp3_si nop mp3_sin_3: sbi PORTC,mp3_dclk dec r20 cbi PORTC,mp3_dclk cbi PORTC,mp3_bsync brne mp3_sin_1 dec r21 brne mp3_sin_0 ret ;********************************************** beep: ;times:r0,High/Low:r1(=1/0) rcall mp3_int beep_0: tst r1 breq beep_1 ldiw z,beep_H*2 rjmp beep_2 beep_1: ldiw z,beep_L*2 beep_2: rcall mp3_sin ldi temp1,100 ;音の長さ rcall wait_ms ldiw z,beep_s*2 rcall mp3_sin ldi temp1,30 ;無音の長さ rcall wait_ms dec r0 brne beep_0 ldiw z,beep_s*2 rcall mp3_sin ret ;********************************************** tagv1: ;tag_read r7:6(remain byte) ,r9:8 (remainsec) mov temp1,r7 or temp1,r6 ;r6 or r7=0? breq tagv1_z1 ;端数ﾊﾞｲﾄなし next ldi temp1,1 ;remainsec：端数ﾊﾞｲﾄ分 +1　 clr temp2 add r8,temp1 adc r9,temp2 tagv1_z1: mov r20,r3 ;Tagがｾｸﾀをまたぐかﾁｪｯｸしﾌﾗｸﾞ設定 inc r20 ;<- secpcl+1 ｸﾗｽﾀまたぎのﾁｪｯｸ用:最終ｸﾗｽﾀのｾｸﾀ数=1　　 clr r21 ldi temp1,0x80 ;remain byte >= 128ﾊﾞｲﾄ? cp r6,temp1 brpl tagv1_z ;r6=>128 　128ﾊﾞｲﾄ以上 tst r7 ;r7<1　? brne tagv1_z ;r6<128 ＆ r7<1　no ldi r21,1 ;Tagがｾｸﾀをまたぐ：ﾌﾗｸﾞ設定 tagv1_z: tst r9 ;last-1 cluster & mod sec=1? brne tagv1_a ;r25 !=0 ,no tst r21 ;Tagがｾｸﾀをまたぐ? breq tagv1_a ;no cp r8,r20 breq tagv1_a0 ;クラスタをまたぎ＆remain<128byte tagv1_a: rcall next_cluster ;cluster=r11:10,nextcluster=r5:4 clr temp1 sub r8,r3 sbc r9,temp1 ;last cluster brcs tagv1_a1 ;secpcl <= rimain breq tagv1_a1 mov r11,r5 mov r10,r4 rjmp tagv1_z tagv1_a1: ;ｸﾗｽﾀをまたがない add r8,r3 ;端数ｾｸﾀが0ならr8=secpcl mov r24,r8 ;remainsec tst r21 ;remain >= 128byte? brne tagv1_a2 ;no <128 mov r22,r6 ;yes　read start addr set mov r23,r7 ;remain-128 から読む subi r22,128 sbci r23,0 rcall tagv1_b ret tagv1_a0: ;ｸﾗｽﾀ(セクタ)をまたぐ mov r24,r3 ;(最終-1)ｸﾗｽﾀの最終ｾｸﾀ　ﾎﾟｲﾝﾀ(secpcl-1) ldi r22,low(384) ldi r23,high(384) ;read start addr set add r22,r6 ;512-(128-remain)=384+remain adc r23,r7 rcall tagv1_b ;(最終-1)ｾｸﾀを384+remainﾊﾞｲﾄから読む push xH push xL rjmp tagv1_1 ;残りを最終ｸﾗｽﾀのｾｸﾀ(最終ｾｸﾀ）のはじめから読む tagv1_a2: ;ｾｸﾀをまたぐ dec r24 ldi r22,low(384) ldi r23,high(384) ;read start addr set add r22,r6 ;512-(128-remain)=384+remain adc r23,r7 rcall tagv1_b ;(最終-2)ｾｸﾀを384+remainﾊﾞｲﾄから読む push xH push xL ldi temp1,0x02 ;lastsec addr set clr temp2 add r13,temp1 ;addr+512 adc r14,temp2 adc r15,temp2 rjmp tagv1_1a ;残りを最終ｾｸﾀのはじめから読む tagv1_b: ; cluster read rcall sec_addr_set ;r15:14:13:12 ldi temp1,0x02 dec r24 mul temp1,r24 clr temp1 add r13,r0 adc r14,r1 ;last or last-1 sector adc r15,temp1 ;addset ;r12=0 sts spi_arg+1,r15 sts spi_arg+2,r14 sts spi_arg+3,r13 sts spi_arg+4,r12 rcall spi_read_open ldiw y,0 ldiw x,id3 ldi temp3,low(id3+128) ldi temp4,high(id3+128) tagv1_01: rcall spi_in cp yL,r22 cpc yH,r23 brcs tagv1_02 ;remain-128 から cp xL,temp3 ; cpc xH,temp4 ;128byte読む brpl tagv1_02 st x+,temp2 tagv1_02: adiw yL,1 cpi yH,0x02 brne tagv1_01 rcall spi_read_close ret tagv1_1: rcall next_cluster mov r11,r5 mov r10,r4 rcall sec_addr_set ;r15:14:13:12 tagv1_1a: sts spi_arg+1,r15 sts spi_arg+2,r14 sts spi_arg+3,r13 sts spi_arg+4,r12 rcall spi_read_open ldiw y,0 pop xL pop xH ldi temp3,low(id3+128) ldi temp4,high(id3+128) tagv1_10: rcall spi_in cp xL,temp3 cpc xH,temp4 brpl tagv1_11 st x+,temp2 tagv1_11: adiw yL,1 cpi yH,0x02 brne tagv1_10 rcall spi_read_close ret ;********************************************** sec_addr_set: clr r12 lds r13,datastart lds r14,datastart+1 lds r15,datastart+2 mov temp1,r10 mov temp2,r11 subi temp1,2 sbci temp2,0 clr temp3 mul temp1,r3 add r13,r0 adc r14,r1 adc r15,temp3 mul temp2,r3 add r14,r0 adc r15,r1 lsl r13 rol r14 rol r15 ret ;********************************************** next_cluster: ;cluster=r11:10 FAT16 clr temp1 ;fatstart*512 -> lds temp2,fatstart ;temp4:3:2:1 lds temp3,fatstart+1 clr temp4 lsl temp2 rol temp3 rol temp4 mov r12,r10 mov r13,r11 clr r14 ;cluster*2 lsl r12 rol r13 rol r14 clr r15 add temp1,r12 adc temp2,r13 adc temp3,r14 adc temp4,r15 ;addr=temp4:3:2:1 ldiw z,0x01FF and zL,temp1 and zH,temp2 ;addr&511 -> Z addi16 zH,zL,fatcache ;Z+=fatcache clr temp1 andi temp2,0xFE lds r12,fatsec ;fatsec=H4:H3:H2 (H1=0) lds r13,fatsec+1 lds r14,fatsec+2 cp r12,temp2 ;FATcache sec=fatsec ? brne n_c_1 ;no cp r13,temp3 brne n_c_1 ;no cp r14,temp4 breq n_c_2 ;yes ,no next line n_c_1: sts spi_arg+1,temp4 sts spi_arg+2,temp3 sts spi_arg+3,temp2 sts spi_arg+4,temp1 rcall read_512 ;addr=spi_arg[4:1] tst temp2 breq n_c_2 clr r4 clr r5 ret n_c_2: ld temp1,z+ ld temp2,z cpi temp2,0xff brne n_c_3 cpi temp1,0xf8 brmi n_c_3 ldi temp1,0xff ldi temp2,0xff n_c_3: mov r4,temp1 mov r5,temp2 ret ;********************************************** read_512: ;512byte read -> FATcache[511:0] rcall spi_read_open tst temp2 breq read_512_1 ret read_512_1: ldiw x,fatcache read_512_2: rcall spi_in st x+,temp2 cpi xL,low(fatcache+512) ;+512 brne read_512_2 cpi xH,high(fatcache+512) brne read_512_2 rcall spi_read_close lds temp4,spi_arg+1 lds temp3,spi_arg+2 lds temp2,spi_arg+3 sts fatsec,temp2 sts fatsec+1,temp3 sts fatsec+2,temp4 clr temp2 ret ;********************************************** ;MP3 search ,temp1 MP3 file number ;return buff[]:last MP3 dir,temp2 found MP3 files search_mp3: mov r20,temp1 clr r21 ;return MP3_count clr r12 ;dirstart[1:0]*512 lds r13,dirstart ; -> r15:14:13:12 lds r14,dirstart+1 clr r15 lsl r13 rol r14 rol r15 sts spi_arg+1,r15 sts spi_arg+2,r14 sts spi_arg+3,r13 sts spi_arg+4,r12 lds r10,rdirent lds r11,rdirent+1 clr zL clr zH search_mp3_1: cp zL,r10 cpc zH,r11 brpl search_mp3_e rcall spi_read_open tst temp2 breq search_mp3_2 mov temp2,r21 ret search_mp3_2: ldi r22,16 ;loop_count set search_mp3_22: ldiw x,buff ldiw y,buff+32 search_mp3_3: rcall spi_in st x+,temp2 cp xL,yL cpc xH,yH brne search_mp3_3 lds temp1,buff tst temp1 ;buff[0]=0? breq search_mp3_e0 ;yes entry end cpi temp1,0xE5 ;deleted file? breq search_mp3_4 ;yes next entry lds temp1,buff+26 lds temp2,buff+27 or temp1,temp2 ;buff[26]=0 & buff[27]=0 breq search_mp3_4 ;yes next entry lds temp1,buff+11 andi temp1,0x18 ;buff[11]=0x10 or 0x08 brne search_mp3_4 ;Attr dir or Volume yes next entry lds temp1,buff+8 cpi temp1,'M' brne search_mp3_4 ;buff[8]="M" not next entry lds temp1,buff+9 cpi temp1,'P' brne search_mp3_4 ;buff[9]="P" not next entry lds temp1,buff+10 cpi temp1,'3' brne search_mp3_4 ;buff[10]="3" not next entry inc r21 ;MP3_file found, MP3_count++ dec r20 breq search_mp3_e0 ;Loop_count=0 then end search_mp3_4: adiw zL,1 ;entri inc dec r22 brne search_mp3_22 ;sector end? not next entry rcall spi_read_close ldi temp1,0x02 ;r15:14:13:12+=512 clr temp2 ;next sector addr set add r13,temp1 adc r14,temp2 adc r15,temp2 sts spi_arg+1,r15 sts spi_arg+2,r14 sts spi_arg+3,r13 rjmp search_mp3_1 search_mp3_e0: rcall spi_read_close search_mp3_e: mov temp2,r21 ret ;********************************************** ;Vfat read sector=512 read_vfat: ldi temp1,BYTE4(446) sts read32_arg,temp1 ldi temp1,BYTE3(446) sts read32_arg+1,temp1 ldi temp1,BYTE2(446) sts read32_arg+2,temp1 ldi temp1,low(446) sts read32_arg+3,temp1 rcall read_32 ;(446) lds r2,buff+8 ;buff[9:8]-->r3:r2=bpb lds r3,buff+9 ;bpb top sec read clr temp1 mov temp2,r2 mov temp3,r3 clr temp4 lsl temp2 rol temp3 rol temp4 ;temp4:3:2:1 <= x 512(9bit left_shift) sts read32_arg,temp4 sts read32_arg+1,temp3 sts read32_arg+2,temp2 sts read32_arg+3,temp1 rcall read_32 ;(temp4:3:2:1) lds temp1,buff+11 ;buff[12:11]-->r11:10=sec_log lds temp2,buff+12 cpi16 temp2,temp1,0x0200 breq read_vfat1 ldi temp2,2 ;1sec not 512bytes ret read_vfat1: lds temp1,buff+13 sts secpcl,temp1 ;buff[13]->secpcl lds temp1,buff+14 lds temp2,buff+15 add temp1,r2 adc temp2,r3 sts fatstart,temp1 sts fatstart+1,temp2 ;buff[15:14]+bpb -> fatstart[1:0] lds temp1,buff+17 lds temp2,buff+18 sts rdirent,temp1 sts rdirent+1,temp2 ;buff[18:17] -> rdirent[1:0] lds r10,buff+22 lds r11,buff+23 ;buff[23:22] -> r11:10=fat_sectors tst r10 brne read_vfat2 tst r11 brne read_vfat2 ldi temp2,1 ;not FAT16/12(FAT32?) ret read_vfat2: lds temp3,buff+16 ;buff[16] mul r10,temp3 ;buff[16]*fat_sectors_L -> r1:r0 mov temp2,r1 ; mov temp1,r0 ;r1:r0 -> temp2:temp1 mul r11,temp3 ;buff[16]*fat_sectors_H -> r1:r0 (r1=0) add temp2,r0 ;temp2:temp1 +=r0:0x00 (fat_sectors*buff[16]) lds temp3,fatstart lds temp4,fatstart+1 ;temp4:temp3 <- fatstart[1:0] add temp1,temp3 adc temp2,temp4 ;temp2:temp1= fat_sectors*buff[16]+ fatstart[1:0] sts dirstart,temp1 sts dirstart+1,temp2 ;temp2:temp1 -> dirstart[1:0] lds temp1,rdirent lds temp2,rdirent+1 ;temp2:temp1/16 -> temp2:temp1...temp4 swap temp2 ;H2:H1 -> H1:H2 mov temp3,temp2 andi temp3,0xF0 ;H1:0 H1 save andi temp2,0x0F ;0:H2 ldi temp4,0x0F and temp4,temp1 ;L1 save (temp2:temp1 MOD 16) swap temp1 ;L2:L1 -> L1:L2 andi temp1,0x0F ;0:L2 or temp1,temp3 ;H1:L2 (n=temp2:temp1=0:H2:H1:L2) tst temp4 breq read_vfat3 addi16 temp2,temp1,1 read_vfat3: lds temp3,dirstart lds temp4,dirstart+1 clr r0 clr r1 add temp3,temp1 adc temp4,temp2 adc r0,r1 ;n+dirstart[1:0] -> r1:r0:temp4:temp3 sts datastart,temp3 ;datastart[3:0] <- r1:r0:temp4:temp3 sts datastart+1,temp4 sts datastart+2,r0 sts datastart+3,r1 lds temp1,buff+19 lds temp2,buff+20 ;all_sectors= buff[20:19] clr temp3 ;all_sectors=temp4:3:2:1 =0:0:XX:XX clr temp4 ; (16bytes long) clr r15 or r15,temp2 or r15,temp1 ;r15 <- r15|temp2|temp1 brne read_vfat4 ;(temp2:temp1=0)? not next ldi temp1,32 ;yes bpb=r3:r2 clr r15 ;arg <- 32+bpb*512 (9bit left_shift) lsl r2 rol r3 rol r15 sts read32_arg,r15 sts read32_arg+1,r3 sts read32_arg+2,r2 sts read32_arg+3,temp1 rcall read_32 ;(32+bpb*512) lds temp1,buff lds temp2,buff+1 lds temp3,buff+2 lds temp4,buff+3 ;all_sectors=temp4:3:2:1 read_vfat4: lds r13,fatstart lds r14,fatstart+1 clr r15 sub temp1,r13 sbc temp2,r14 sbc temp3,r15 sbc temp4,r15 ;all_sectors -= fatstart clr r20 ;spcpcl -> r23:22:21:20 (base r20) lds r21,secpcl ;***spcpcl*4096(12bit L_shift)*** mov r22,r21 ;r20->r21 8bit,r21=r22(H:L) copy swap r21 ;r21 H<->L andi r21,0xF0 ;r21 L0 (+4bit->12bit) swap r22 ;r22 H<->L andi r22,0x0F ;r22 0H clr r23 ;spcpcl*4096 -> r23:22:21:20 cp temp1,r20 cpc temp2,r21 cpc temp3,r22 cpc temp4,r23 ;sec:spcpcl*4096 brmi read_vfat5 ldi temp1,1 ;FAT16 rjmp read_vfat6 read_vfat5: clr temp1 ;FAT12 ldi temp2,3 ; ret ; read_vfat6: sts fattype,temp1 clr temp2 ret ;********************************************** ;read_32 read32_arg[3:0] read_32: lds r15,read32_arg lds r14,read32_arg+1 lds r13,read32_arg+2 lds r12,read32_arg+3 mov temp4,r15 mov temp3,r14 ldi temp2,0xFE and temp2,r13 clr temp1 sts spi_arg+1,temp4 sts spi_arg+2,temp3 sts spi_arg+3,temp2 sts spi_arg+4,temp1 rcall spi_read_open tst temp2 breq read_32_1 ret ;temp2=1 erro read_32_1: mov temp3,r12 ldi temp4,1 and temp4,r13 ;low_addr=temp4:3 <- addr&0x1FF clr yL clr yH ;Y:counter 0 to 511 ldiw x,buff ldiw z,buff+32 read_32_2: rcall spi_in cp yL,temp3 cpc yH,temp4 ;Y:low_addr brmi read_32_3 ;Y=low_addr cpc xH,zH ;x:buff+32 brpl read_32_3 ;x>=buff+32 st x+,temp2 ;Y>=low_addr & xtemp2 ldiw Y,2048 spi_com1: rcall spi_in cpi temp2,0xff breq spi_com2 sbiw YL,1 brne spi_com1 ldi temp2,1 ret ;busy error return=1 spi_com2: lds temp1,spi_arg mov temp2,temp1 ori temp1,0x40 rcall spi_out ;cmd lds temp1,spi_arg+1 rcall spi_out ;arg3 lds temp1,spi_arg+2 rcall spi_out ;arg2 lds temp1,spi_arg+3 rcall spi_out ;arg1 lds temp1,spi_arg+4 rcall spi_out ;arg0 tst temp2 brne spi_com3 ldi temp1,0x95 ;int CRC rjmp spi_com4 spi_com3: ldi temp1,1 spi_com4: rcall spi_out ;CRC ldiw Y,2048 spi_com5: rcall spi_in cpi temp2,0xFE breq spi_com6 ;data talken start ldi temp3,0x80 and temp3,temp2 breq spi_com6 ;cmd response (MSB=0) sbiw YL,1 brne spi_com5 spi_com6: ;return=temp2 ret ;********************************************** ;LCD メッセージ表示 lcd_dat_dsp: ldi lcd_data,1 ; clear ,homepos rcall lcd_cmd ldi lcd_data,0x82 rcall lcd_cmd lcd_dat_dsp1: lpm lcd_data,z+ cpi lcd_data,13 brne lcd_dat_dsp2 ret lcd_dat_dsp2: rcall lcd_dsp rjmp lcd_dat_dsp1 ;********************************************** ; LCD - Send a data/cmd into LCD ;PORTD 7 6 5 4 3 2 1 0 ;write <-data(H/L)-> enb r/w R/S mp_dreq=1 ;read BF / address lcd_int: ; Internal reset ldi lcd_data,0x31 ; data='0011',RW = "L",E = "L",RS = "L" out PORTD,lcd_data ; mp_dreq=1 sbi PORTD,lcd_enb ; E = "H" nop ; I/O delay nop ; I/O delay nop ; I/O delay cbi PORTD,lcd_enb ; E = "L" ret lcd_dsp: rcall lcd_bfch ldi temp3,3 ; RW = "L",E = "L", RS = "H",data='xxxx' rjmp lcd_cmd1 ; mp_dreq=1 lcd_cmd: rcall lcd_bfch ldi temp3,1 ; RW = "L",E = "L",RS = "L",data='xxxx' lcd_cmd1: ; mp_dreq=1 mov temp2,lcd_data swap temp2 andi temp2,0xf0 ;data_L save andi lcd_data,0xf0 ;data_H set or lcd_data,temp3 out PORTD,lcd_data ; PORTD = data_H,RW sbi PORTD,lcd_enb ; E = "H" mov lcd_data,temp2 ; or lcd_data,temp3 ;data_L set nop cbi PORTD,lcd_enb ; E = "L" nop ; I/O delay out PORTD,lcd_data ; PORTD = data_L,RW sbi PORTD,lcd_enb ; E = "H" nop ; I/O delay nop ; I/O delay nop ; I/O delay cbi PORTD,lcd_enb ; E = "L" ret lcd_bfch: cbi DDRD,lcd_db7 ; lcd_db7 = INPUT sbi PORTD,lcd_db7 ; pullup sbi PORTD,lcd_rw ; RW = "H" cbi PORTD,lcd_rs ; RS = "L" lcd_bfch1: sbi PORTD,lcd_enb ; E = "H" nop ; I/O delay nop ; I/O delay in temp1,PIND cbi PORTD,lcd_enb ; E = "L" nop nop sbi PORTD,lcd_enb ; E = "H" nop ; I/O delay nop ; I/O delay in temp2,PIND cbi PORTD,lcd_enb ; E = "L" andi temp1,0x80 ; Wait until busy flag becomes zero. brne lcd_bfch1 sbi DDRD,lcd_db7 ; lcd_db7 = OUTPUT cbi PORTD,lcd_db7 ; clear ret wait_us: ;base 8MHz temp1　us (8clocks) nop ; 1clocks nop ; 1clocks nop ; 1clocks nop ; 1clocks nop ; 1clocks dec temp1 ; 1clocks brne wait_us ; 2clocks ret ; wait_ms: ;temp1　ms ldi temp2,125 ;64*125=8000clocks wait_ms_01: ldi temp3,15 ;1clocks 4*(15+1)=64 wait_ms_02: nop ; 1clocks dec temp3 ; 1clocks brne wait_ms_02 ; 2clocks dec temp2 ; 1clocks brne wait_ms_01 ; 2clocks dec temp1 ; 1clocks brne wait_ms ; 2clocks ret ;********************************************* ;main_test: ; ldi lcd_data,0x80 ; rcall lcd_cmd ; ldiw y,buff ;main_21: ; ld r20,y+ ; rcall dsp_dec ; cpi16 yh,yl,buff+8 ; brne main_22 ; ldi lcd_data,0xC0 ; rcall lcd_cmd ;main_22: ; cpi16 yH,YL,buff+16 ; brne main_21 ;********************************************** dsp_dec: ldi r23,0xF0 and r23,temp4 swap r23 cpi r23,10 brmi dsp_dec1 subi r23,-7 dsp_dec1: subi r23,-48 rcall lcd_dsp ldi r23,0x0F and r23,temp4 cpi r23,10 brmi dsp_dec2 subi r23,-7 dsp_dec2: subi r23,-48 rcall lcd_dsp ret ;********************************************* EEPROM_WR: rcall EEPROM_RD cp temp1,temp2 ;同じ値ならスキップ brne EEPROM_WR1 ret EEPROM_WR1: SBIC EECR,EEWE ;EEPROM書き込み完了ならばｽｷｯﾌﾟ RJMP EEPROM_WR1 ;以前のEEPROM書き込み完了まで待機 OUT EEARH,ZH ;EEPROMｱﾄﾞﾚｽ上位ﾊﾞｲﾄ設定 OUT EEARL,ZL ;EEPROMｱﾄﾞﾚｽ下位ﾊﾞｲﾄ設定 OUT EEDR,temp1 ;EEPROM書き込み値を設定 SBI EECR,EEMWE ;EEPROMﾏｽﾀ書き込み許可ﾋﾞｯﾄ設定 SBI EECR,EEWE ;EEPROM書き込み開始(書き込み許可ﾋﾞｯﾄ設定) RET ;呼び出し元へ復帰 ;********************************************* EEPROM_RD: SBIC EECR,EEWE ;EEPROM書き込み完了ならばｽｷｯﾌﾟ RJMP EEPROM_RD ;以前のEEPROM書き込み完了まで待機 OUT EEARH,ZH ;EEPROMｱﾄﾞﾚｽ上位ﾊﾞｲﾄ設定 OUT EEARL,ZL ;EEPROMｱﾄﾞﾚｽ下位ﾊﾞｲﾄ設定 SBI EECR,EERE ;EEPROM読み出し開始(読み込み許可ﾋﾞｯﾄ設定) IN temp2,EEDR ;EEPROM読み出し値を取得 RET ;呼び出し元へ復帰 ;********************************************* ;LCD DATA ready: .db "MP3 Player ",13 fat_err: .db "VFAT error ",13 sd_err: .db "SD error ",13 no_mp3: .db "No MP3 files ",13 mp3_err: .db "MP3 error ",13 no_tag: .db "No ID3 Tag V1",13 vol: .db "Vol:",13,0 batt_low: .db " Battery Low ",13,0 shut_down: .db "Shut Down",13 pause: .db " Pause",13,0 ;BEEP data beep_H: .db 0x53,0xEF,0x6E,0x31,0,0,0,0 ;1500Hz beep_L: .db 0x53,0xEF,0x6E,0x35,0,0,0,0 ; 500Hz beep_s: .db 0x45,0x78,0x69,0x74,0,0,0,0 ; stop mp3_0: .db 0,0,0,0,0,0,0,0