📄 i2s_codec.txt
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AREA ||i.I2S_CODEC_Init||, CODE, READONLY, ALIGN=2
I2S_CODEC_Init PROC
;;;116 u32 I2S_CODEC_Init(u32 OutputDevice, u32 Address)
;;;117 {
000000 e92de92d PUSH {r1-r11,lr}
;;;118 u32 count = 0;
;;;119
;;;120 /* Set the audio file address */
;;;121 AudioFileAddress = (vu32) Address;
000004 4c2d LDR r4,|L12.188|
000006 4607 MOV r7,r0 ;117
000008 60a1 STR r1,[r4,#8] ; AudioFileAddress
00000a 2024 MOVS r0,#0x24
00000c f88df88d STRB r0,[sp,#8]
000010 2500 MOVS r5,#0
000012 f88df88d STRB r5,[sp,#9]
000016 f88df88d STRB r5,[sp,#0xa]
00001a 2001 MOVS r0,#1
00001c f88df88d STRB r0,[sp,#0xb]
000020 a802 ADD r0,sp,#8
000022 f7fff7ff BL NVIC_Init
;;;122
;;;123 /* Configure I2S interrupt Channel */
;;;124 NVIC_Config();
;;;125
;;;126 /* Configure the I2S2, I2C1 and GPIOF pins */
;;;127 I2S_GPIO_Config();
000026 f7fff7ff BL I2S_GPIO_Config
;;;128
;;;129 /* Read the Audio file to extract the audio data length and frequency */
;;;130 errorcode = AudioFile_Init();
00002a f7fff7ff BL AudioFile_Init
00002e f8dff8df LDR r9,|L12.192|
;;;131
;;;132 if (errorcode < 3)
000032 62e0 STR r0,[r4,#0x2c] ; errorcode
000034 2803 CMP r0,#3
000036 d206 BCS |L12.70|
;;;133 {
;;;134 /* Turn on LD2 connected to PF.07 */
;;;135 GPIO_SetBits(GPIOF, GPIO_Pin_7);
000038 2180 MOVS r1,#0x80
00003a 4648 MOV r0,r9
00003c f7fff7ff BL GPIO_SetBits
;;;136
;;;137 return errorcode;
000040 6ae0 LDR r0,[r4,#0x2c] ; errorcode
|L12.66|
;;;138 }
;;;139
;;;140 /* Configure the SPI2 peripheral in I2S mode */
;;;141 I2S_Config(I2S_STANDARD, I2S_MCLKOUTPUT, i2saudiofreq);
;;;142
;;;143 /* Set the current output device */
;;;144 CurrentOutputDevice = OutputDevice;
;;;145
;;;146 /* Codec Configuration via I2C interface */
;;;147 count = CODEC_Config(OutputDevice, I2S_STANDARD, I2S_MCLKOUTPUT, DEFAULT_VOL);
;;;148
;;;149 if (count != 0)
;;;150 {
;;;151 /* Turn on LD1 connected to PF.06 */
;;;152 GPIO_SetBits(GPIOF, GPIO_Pin_6);
;;;153
;;;154 return 3;
;;;155 }
;;;156
;;;157 /* Turn on LD4 connected to PF.09 */
;;;158 GPIO_SetBits(GPIOF, GPIO_Pin_9);
;;;159
;;;160 return 0; /* Configuration is OK */
;;;161 }
000042 e8bde8bd POP {r1-r11,pc}
|L12.70|
000046 2101 MOVS r1,#1
000048 f8b4f8b4 LDRH r8,[r4,#4] ;141 ; i2saudiofreq
00004c 0388 LSLS r0,r1,#14 ;141
00004e f7fff7ff BL RCC_APB1PeriphClockCmd
000052 f8dff8df LDR r10,|L12.196|
000056 4650 MOV r0,r10 ;141
000058 f7fff7ff BL SPI_I2S_DeInit
00005c f44ff44f MOV r6,#0x200 ;141
000060 f8adf8ad STRH r6,[sp,#0] ;141
000064 f8adf8ad STRH r5,[sp,#4] ;141
000068 f8adf8ad STRH r8,[sp,#8] ;141
00006c f8adf8ad STRH r5,[sp,#2] ;141
000070 f8adf8ad STRH r6,[sp,#6] ;141
000074 f8adf8ad STRH r5,[sp,#0xa] ;141
000078 4669 MOV r1,sp ;141
00007a 4650 MOV r0,r10 ;141
00007c f7fff7ff BL I2S_Init
000080 2200 MOVS r2,#0 ;141
000082 2171 MOVS r1,#0x71 ;141
000084 4650 MOV r0,r10 ;141
000086 f7fff7ff BL SPI_I2S_ITConfig
00008a 2101 MOVS r1,#1 ;141
00008c 4650 MOV r0,r10 ;141
00008e f7fff7ff BL I2S_Cmd
000092 2318 MOVS r3,#0x18 ;147
000094 4632 MOV r2,r6 ;147
000096 2100 MOVS r1,#0 ;147
000098 b2b8 UXTH r0,r7 ;147
00009a 62a7 STR r7,[r4,#0x28] ;147 ; CurrentOutputDevice
00009c f7fff7ff BL CODEC_Config
0000a0 b128 CBZ r0,|L12.174|
0000a2 2140 MOVS r1,#0x40 ;152
0000a4 4648 MOV r0,r9 ;152
0000a6 f7fff7ff BL GPIO_SetBits
0000aa 2003 MOVS r0,#3 ;154
0000ac e7c9 B |L12.66|
|L12.174|
0000ae 4631 MOV r1,r6 ;158
0000b0 4648 MOV r0,r9 ;158
0000b2 f7fff7ff BL GPIO_SetBits
0000b6 2000 MOVS r0,#0 ;160
0000b8 e7c3 B |L12.66|
;;;162
ENDP
0000ba 0000 DCW 0x0000
|L12.188|
0000bc 00000000 DCD ||.data||
|L12.192|
0000c0 40011c00 DCD 0x40011c00
|L12.196|
0000c4 40003800 DCD 0x40003800
AREA ||i.I2S_CODEC_ReplayConfig||, CODE, READONLY, ALIGN=2
I2S_CODEC_ReplayConfig PROC
;;;172 /* Audio Replay number set by user */
;;;173 AudioReplay = Repetions;
000000 4901 LDR r1,|L13.8|
000002 6188 STR r0,[r1,#0x18] ; AudioReplay
;;;174
;;;175 /* Audio Replays number remaining (if AudioReplay != 0) */
;;;176 AudioReplayCount = Repetions;
;;;177 }
000004 61c8 STR r0,[r1,#0x1c] ; AudioReplayCount
000006 4770 BX lr
;;;178
ENDP
|L13.8|
000008 00000000 DCD ||.data||
AREA ||i.SetVar_AudioPlayStatus||, CODE, READONLY, ALIGN=2
SetVar_AudioPlayStatus PROC
000000 4901 LDR r1,|L14.8|
000002 6248 STR r0,[r1,#0x24] ; AudioPlayStatus
000004 6a48 LDR r0,[r1,#0x24] ; AudioPlayStatus
000006 4770 BX lr
ENDP
|L14.8|
000008 00000000 DCD ||.data||
AREA ||i.Media_StartReadSequence||, CODE, READONLY, ALIGN=1
Media_StartReadSequence PROC
000000 4770 BX lr
ENDP
AREA ||i.I2S_CODEC_Play||, CODE, READONLY, ALIGN=2
I2S_CODEC_Play PROC
000000 b510 PUSH {r4,lr}
000002 4c05 LDR r4,|L16.24|
000004 68a0 LDR r0,[r4,#8] ; AudioFileAddress
000006 2001 MOVS r0,#1
000008 6260 STR r0,[r4,#0x24] ; AudioPlayStatus
00000a 4602 MOV r2,r0
00000c 2171 MOVS r1,#0x71
00000e 4803 LDR r0,|L16.28|
000010 f7fff7ff BL SPI_I2S_ITConfig
000014 6960 LDR r0,[r4,#0x14] ; AudioDataIndex
000016 bd10 POP {r4,pc}
ENDP
|L16.24|
000018 00000000 DCD ||.data||
|L16.28|
00001c 40003800 DCD 0x40003800
AREA ||i.I2S_CODEC_Pause||, CODE, READONLY, ALIGN=2
I2S_CODEC_Pause PROC
;;;207 u32 I2S_CODEC_Pause()
;;;208 {
000000 b510 PUSH {r4,lr}
;;;209 /* Disable the I2S2 TXE Interrupt => stop the clocks*/
;;;210 SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_TXE, DISABLE);
000002 2200 MOVS r2,#0
000004 2171 MOVS r1,#0x71
000006 4809 LDR r0,|L17.44|
000008 f7fff7ff BL SPI_I2S_ITConfig
00000c 4808 LDR r0,|L17.48|
00000e 2102 MOVS r1,#2
000010 6241 STR r1,[r0,#0x24] ; AudioPlayStatus
;;;211
;;;212 /* Set Paused status to inform other modules about the codec status */
;;;213 SetVar_AudioPlayStatus(AudioPlayStatus_PAUSED);
;;;214
;;;215 /* Reset local variables */
;;;216 monovar = 0;
000012 2100 MOVS r1,#0
000014 6301 STR r1,[r0,#0x30] ; monovar
;;;217 tmpvar = 0;
000016 6341 STR r1,[r0,#0x34] ; tmpvar
;;;218
;;;219 if (WAVE_Format.NumChannels == Channel_MONO)
000018 4906 LDR r1,|L17.52|
00001a 88c9 LDRH r1,[r1,#6] ; WAVE_Format
00001c 2901 CMP r1,#1
00001e d103 BNE |L17.40|
;;;220 {
;;;221 /* Force the parity of the address */
;;;222 AudioDataIndex &= 0xFFFFFFFE;
000020 6941 LDR r1,[r0,#0x14] ; AudioDataIndex
000022 f021f021 BIC r1,r1,#1
000026 6141 STR r1,[r0,#0x14] ; AudioDataIndex
|L17.40|
;;;223 }
;;;224 /* Return the current data pointer position */
;;;225 return AudioDataIndex;
000028 6940 LDR r0,[r0,#0x14] ; AudioDataIndex
;;;226 }
00002a bd10 POP {r4,pc}
;;;227
ENDP
|L17.44|
00002c 40003800 DCD 0x40003800
|L17.48|
000030 00000000 DCD ||.data||
|L17.52|
000034 00000064 DCD ||.bss||+0x64
AREA ||i.I2S_CODEC_PowerDown||, CODE, READONLY, ALIGN=2
I2S_CODEC_PowerDown PROC
000000 b510 PUSH {r4,lr}
000002 2802 CMP r0,#2
000004 d109 BNE |L18.26|
000006 2140 MOVS r1,#0x40
000008 2000 MOVS r0,#0
00000a f7fff7ff BL CODEC_WriteRegister
00000e 2100 MOVS r1,#0
000010 e8bde8bd POP {r4,lr}
000014 4608 MOV r0,r1
000016 f7fff7ff B.W CODEC_WriteRegister
|L18.26|
00001a e8bde8bd POP {r4,lr}
00001e f44ff44f MOV r1,#0x800
000022 4801 LDR r0,|L18.40|
000024 f7fff7ff B.W GPIO_ResetBits
ENDP
|L18.40|
000028 40012000 DCD 0x40012000
AREA ||i.I2S_CODEC_Stop||, CODE, READONLY, ALIGN=2
I2S_CODEC_Stop PROC
;;;236 u32 I2S_CODEC_Stop()
;;;237 {
000000 b570 PUSH {r4-r6,lr}
;;;238 /* Disable the I2S2 TXE Interrupt => stop the clocks */
;;;239 SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_TXE, DISABLE);
000002 2200 MOVS r2,#0
000004 2171 MOVS r1,#0x71
000006 4807 LDR r0,|L19.36|
000008 f7fff7ff BL SPI_I2S_ITConfig
;;;240
;;;241 /* Reinitialize the audio data pointer */
;;;242 AudioDataIndex = 0;
00000c 4d06 LDR r5,|L19.40|
00000e 2400 MOVS r4,#0
000010 616c STR r4,[r5,#0x14] ; AudioDataIndex
;;;243
;;;244 /* Power off the Codec to save power and protect the Codec itself */
;;;245 I2S_CODEC_PowerDown(CodecPowerDown_SW);
000012 2002 MOVS r0,#2
000014 f7fff7ff BL I2S_CODEC_PowerDown
000018 626c STR r4,[r5,#0x24] ; AudioPlayStatus
;;;246
;;;247 /* Set Paused status to inform other modules about the codec status */
;;;248 SetVar_AudioPlayStatus(Au⌨️ 快捷键说明
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