; ------------------------------------------------- ; Constants ; ------------------------------------------------- include "../../../lib/jasm/cregs.inc.jsm" ; XIO registers reg_led: equ 0x00 ; R/W reg_pcmmode: equ 0x01 ; R/W reg_freq: equ 0x02 ; R/W reg_cmd_addr: equ 0x04 ; WO reg_cmd_data: equ 0x06 ; WO lcd_port: equ 0x08 ; R/W reg_mix_dc_adj_left: equ 0x09 ; R/W reg_mix_dc_adj_right: equ 0x0B ; R/W reg_pcmin_dc_adj_left: equ 0x0D ; R/W reg_pcmin_dc_adj_right: equ 0x0F ; R/W reg_stat_addr: equ 0x04 ; RO reg_stat_data: equ 0x06 ; RO reg_btn: equ 0x80 ; RO reg_dip: equ 0x81 ; RO reg_pcm_left: equ 0x82 ; RO reg_pcm_right: equ 0x84 ; RO reg_mix_x_left: equ 0x86 ; RO reg_mix_x_right: equ 0x88 ; RO reg_mix_y_left: equ 0x8A ; RO reg_mix_y_right: equ 0x8C ; RO reg_stat_hw: equ 0xA0 ; RO reg_beef: equ 0x8E ; reg_stat_hw ; Bits omsk_ac_rdy: equ 0x01 omsk_cmd_rdy: equ 0x02 omsk_stat_rdy: equ 0x04 omsk_fir_rdy: equ 0x08 ; Flag masks omsk_led0: equ 0x01 omsk_led1: equ 0x02 omsk_led2: equ 0x04 omsk_led3: equ 0x08 amsk_led0: equ 0xFE amsk_led1: equ 0xFD amsk_led2: equ 0xFB amsk_led3: equ 0xF7 omsk_btn_W: equ 0x01 omsk_btn_N: equ 0x02 omsk_btn_E: equ 0x04 omsk_btn_S: equ 0x08 omsk_btn_C: equ 0x10 DC_CORR_PCM: equ 0xFF40 DC_CORR_MIX: equ 0x005C NCO_FREQ: equ 0x4000 BAR_UPD_INTERVAL: equ 0x0080 ; ------------------------------------------------- ; On-Chip memory ; ------------------------------------------------- cmem 0 btn_state: db 1 dip_state: db 1 stat_addr: db 2 stat_data: db 2 bar_value: db 2 bar_data: db 2 lcd_disp: db 4 bar_upd_count: db 2 count: db 2 xmem msg_txt: dc "AC'97 Test V1.2", 0 ac97_cfg_addr: dc 0x00, 0x2A ; W: Extended Audio CTRL/STATUS dc 0x00, 0x1A ; W: Record select dc 0x00, 0x1C ; W: Record gain dc 0x00, 0x2C ; W: PCM DAC rate dc 0x00, 0x32 ; W: PCM ADC rate dc 0x00, 0x20 ; W: General purpose dc 0x00, 0x02 ; W: Master volume dc 0x00, 0x04 ; W: Headphone volume dc 0x00, 0x18 ; W: PCM volume ac97_cfg_data: dc 0x01, 0x00 ; W: VRA=1 dc 0x04, 0x04 ; W: Record source = LINE_IN dc 0x00, 0x00 ; W: Record gain = 0dB dc 0x80, 0xBB ; W: DAC rate 48000Hz dc 0x80, 0xBB ; W: ADC rate 48000Hz dc 0x00, 0x80 ; W: POP=1 dc 0x00, 0x00 ; W: Master volume = 0dB dc 0x00, 0x00 ; W: Headphone volume = 0dB, muted dc 0x0A, 0x0A ; W: PCM volume = -3dB ; ------------------------------------------------- ; Program ; ------------------------------------------------- code org 0x000 reset: jmp init org 0x001 jmp frame_isr ; ------------------------------------------------- ; Main ; ------------------------------------------------- init: mov R0, 0x00 mov R1, 0x00 mov R2, 0x00 mov R3, 0x00 xout (reg_led), R0 movc (btn_state), R0 movc (count+0), R0 movc (count+1), R0 movc (bar_data+0), R0 movc (bar_data+1), R0 mov R0, BAR_UPD_INTERVAL,'low mov R1, BAR_UPD_INTERVAL,'high movc (bar_upd_count+0), R0 movc (bar_upd_count+1), R1 call LCD_init call LCD_INIT_CGRAM ; Print Hello world mov R0, LCD_CMD_CLEAR call LCD_writecmd mov R1, msg_txt call LCD_putsx wait_ac_rdy: xin R0, (reg_stat_hw) and R0, omsk_ac_rdy jz wait_ac_rdy wait_fir_rdy: xin R0, (reg_stat_hw) and R0, omsk_fir_rdy jz wait_fir_rdy call delay1s ; Send AC97 Status register read-request (CODEC_ID) mov R0, 0x00 mov R1, 0x80 mov R2, 0x00 mov R3, 0x00 call AC_status_io movc (stat_addr+0), R0 movc (stat_addr+1), R1 movc (stat_data+0), R2 movc (stat_data+1), R3 ; Initialize AC97 ; check status ac97_rdy_lp: mov R0, 0x00 mov R1, 0xA6 mov R2, 0x00 mov R3, 0x00 call AC_status_io and R2, 0x0F cmp R2, 0x0F jne ac97_rdy_lp mov R15, 9 mov R7, ac97_cfg_addr mov R8, ac97_cfg_data ac97_init_lp: movx R0, (R7) inc R7 movx R1, (R7) inc R7 movx R2, (R8) inc R8 movx R3, (R8) inc R8 call AC_status_io dec R15 jnz ac97_init_lp ; Print status address label: mov R0, LCD_CMD_CLEAR call LCD_writecmd mov R0, 65 call LCD_writechar mov R0, 58 call LCD_writechar movc R0, (stat_addr+1) call PutHexByte movc R0, (stat_addr+0) call PutHexByte ; Print status data mov R0, 32 call LCD_writechar mov R0, 68 call LCD_writechar mov R0, 58 call LCD_writechar movc R0, (stat_data+1) call PutHexByte movc R0, (stat_data+0) call PutHexByte ; Set PCM mode mov R0, 0x00 xout (reg_pcmmode), R0 ; Set NCO frequency mov R0, NCO_FREQ'high xout (reg_freq+1), R0 mov R0, NCO_FREQ'low xout (reg_freq+0), R0 ; PCM-IN: Set DC correction LEFT mov R0, DC_CORR_PCM'high xout (reg_pcmin_dc_adj_left+1), R0 mov R0, DC_CORR_PCM'low xout (reg_pcmin_dc_adj_left+0), R0 ; PCM-IN: Set DC correction RIGHT mov R0, DC_CORR_PCM'high xout (reg_pcmin_dc_adj_right+1), R0 mov R0, DC_CORR_PCM'low xout (reg_pcmin_dc_adj_right+0), R0 ; Mixer: Set DC correction LEFT mov R0, DC_CORR_MIX'high xout (reg_mix_dc_adj_left+1), R0 mov R0, DC_CORR_MIX'low xout (reg_mix_dc_adj_left+0), R0 ; Mixer: Set DC correction RIGHT mov R0, DC_CORR_MIX'high xout (reg_mix_dc_adj_right+1), R0 mov R0, DC_CORR_MIX'low xout (reg_mix_dc_adj_right+0), R0 ; Switch on LED xin R0, (reg_led) or R0, omsk_led0 xout (reg_led), R0 ; Enable Interrupt mov R0, 0x07 cout (cpu_int_ctrl), R0 ; Sample switches and buttons main: xin R0, (reg_dip) movc (dip_state), R0 xin R0, (reg_btn) movc (btn_state), R0 movc R0, (dip_state) xout (reg_pcmmode), R0 xin R0, (reg_led) and R0, omsk_led3 jnz main mov R0, LCD_CMD_Z2 call LCD_writecmd movc R0, (btn_state) and R0, omsk_btn_C jnz disp_mix xin R0, (reg_pcm_left+0) movc (lcd_disp+0), R0 xin R0, (reg_pcm_left+1) movc (lcd_disp+1), R0 xin R0, (reg_pcm_right+0) movc (lcd_disp+2), R0 xin R0, (reg_pcm_right+1) movc (lcd_disp+3), R0 jmp print disp_mix: xin R0, (reg_mix_x_left+0) movc (lcd_disp+0), R0 xin R0, (reg_mix_x_left+1) movc (lcd_disp+1), R0 xin R0, (reg_mix_x_right+0) movc (lcd_disp+2), R0 xin R0, (reg_mix_x_right+1) movc (lcd_disp+3), R0 print: call bar_div mov R0, 76 call LCD_writechar mov R0, 58 call LCD_writechar movc R0, (lcd_disp+1) call PutHexByte movc R0, (lcd_disp+0) call PutHexByte mov R0, 32 call LCD_writechar mov R0, 82 call LCD_writechar mov R0, 58 call LCD_writechar movc R0, (lcd_disp+3) call PutHexByte movc R0, (lcd_disp+2) call PutHexByte chk_wm: movc R0, (btn_state) and R0, omsk_btn_W jz chk_em ; Decrease NCO frequency xin R0, (reg_freq+0) xin R1, (reg_freq+1) sub R0, 0x64 jnc upd_regs dec R1 jmp upd_regs chk_em: movc R0, (btn_state) and R0, omsk_btn_E jz ex_chk ; Increase NCO frequency xin R0, (reg_freq+0) xin R1, (reg_freq+1) add R0, 0x64 jnc upd_regs inc R1 jmp upd_regs upd_regs: xout (reg_freq+1), R1 xout (reg_freq+0), R0 w4led: xin R0, (reg_led) and R0, omsk_led3 jz w4led ex_chk: jmp main ; ------------------------------------------------- frame_isr: push R0 push R1 movc R0, (count+0) movc R1, (count+1) inc R0 cmp R0, 0x30 jnz ex_isr mov R0, 0 push R0 xin R0, (reg_btn) movc (btn_state), R0 pop R0 inc R1 cmp R1, 0x64 jnz ex_isr call subr mov R1, 0 ex_isr: movc (count+0), R0 movc (count+1), R1 pop R1 pop R0 reti ; ------------------------------------------------- subr: xin R0, (reg_led) mov R1, R0 and R1, omsk_led3 jnz switch_off or R0, omsk_led3 jmp switch switch_off: and R0, amsk_led3 switch: xout (reg_led), R0 ret ; ------------------------------------------------- ; AC Read/Write register ; R0 : IN/OUT AC register address 7..0. Written, if cmd was READ (i.e. address[15] = 1) ; R1 : IN/OUT AC register address 15..8. Written, if cmd was READ (i.e. address[15] = 1) ; R2 : IN/OUT AC register data 7..0. Written, if cmd was READ (i.e. address[15] = 1) ; R3 : IN/OUT AC register data 15..8. Written, if cmd was READ (i.e. address[15] = 1) AC_status_io: call wait_cmd_rdy xout (reg_cmd_addr+1), R1 xout (reg_cmd_addr+0), R0 xout (reg_cmd_data+1), R3 xout (reg_cmd_data+0), R2 ; Check if command was read and R1, 0x80 jnz wait_read ret ; Wait for READ command being processed wait_read: call wait_stat_rdy ; Read AC97 Status register address xin R1, (reg_stat_addr+1) xin R0, (reg_stat_addr+0) ; Read AC97 Status register data xin R3, (reg_stat_data+1) xin R2, (reg_stat_data+0) ret ; ------------------------------------------------- wait_cmd_rdy: push R0 wcr_loop: xin R0, (reg_stat_hw) and R0, omsk_cmd_rdy jz wcr_loop pop R0 ret ; ------------------------------------------------- wait_stat_rdy: push R0 wsr_loop: xin R0, (reg_stat_hw) and R0, omsk_stat_rdy jz wsr_loop pop R0 ret ; ------------------------------------------------- ; PutHexByte ; R0 : Byte value PutHexByte: call bin2hex call LCD_writechar mov R0, R1 call LCD_writechar ret ; ------------------------------------------------- ; Init LCD CG-RAM LCD_INIT_CGRAM: mov R0, 0x40 call LCD_writecmd mov R1, 0xE0 mov R15, 6 write_char: mov R14, 7 write_cols: mov R0, R1 call LCD_writedata dec R14 jnz write_cols mov R0, 0 call LCD_writedata mov R0, 1 shr R0 rorc R1 dec R15 jnz write_char ret ; ------------------------------------------------- bar_div: push R0 push R1 push R15 movc R0, (bar_upd_count+0) movc R1, (bar_upd_count+1) dec R0 subc R1, 0 movc (bar_upd_count+0), R0 movc (bar_upd_count+1), R1 tst R1 jz chk_lsb jmp ex_div chk_lsb: tst R0 jz reload jmp ex_div reload: mov R0, BAR_UPD_INTERVAL,'low mov R1, BAR_UPD_INTERVAL,'high movc (bar_upd_count+0), R0 movc (bar_upd_count+1), R1 mov R15, 11 mov R0, 0 movc R1, (lcd_disp+1) cmp R1, 0x80 jge skip_l go_l: movc R1, (lcd_disp+1) movc R0, (lcd_disp+0) div_lp_l: shr R1 rorc R0 dec R15 jnz div_lp_l skip_l: movc (bar_value+0), R0 mov R15, 11 mov R0, 0 movc R1, (lcd_disp+3) cmp R1, 0x80 jge skip_r go_r: movc R0, (lcd_disp+2) movc R1, (lcd_disp+3) div_lp_r: shr R1 rorc R0 dec R15 jnz div_lp_r skip_r: movc (bar_value+1), R0 movc R0, (bar_value+0) movc R1, (bar_data+0) tst R1 jz bot_l dec R1 bot_l: cmp R0, R1 jlt no_upd_l mov R1, R0 no_upd_l: movc (bar_data+0), R1 movc R0, (bar_value+1) movc R1, (bar_data+1) tst R1 jz bot_r dec R1 bot_r: cmp R0, R1 jlt no_upd_r mov R1, R0 no_upd_r: movc (bar_data+1), R1 ex_div: pop R15 pop R1 pop R0 ret include "../../../lib/jasm/delays.inc.jsm" include "../../../lib/jasm/lcd.inc.jsm" include "../../../lib/jasm/utils.inc.jsm"