📄 i2s_codec.txt
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;;;355 {
000002 4604 MOV r4,r0
;;;356 /* Pause Playing the audio file */
;;;357 I2S_CODEC_Pause();
000004 f7fffffe BL I2S_CODEC_Pause
;;;358
;;;359 /* Increment the Audio pointer */
;;;360 IncrementVar_AudioDataIndex((AudioDataLength / 100) * Step);
000008 4b08 LDR r3,|L19.44|
00000a 2164 MOVS r1,#0x64
00000c 68d8 LDR r0,[r3,#0xc] ; AudioDataLength
00000e fbb0f0f1 UDIV r0,r0,r1
000012 4360 MULS r0,r4,r0
000014 f7fffffe BL IncrementVar_AudioDataIndex
;;;361
;;;362 /* Insure the index parity */
;;;363 AudioDataIndex &= 0xFFFFFFFE;
000018 6958 LDR r0,[r3,#0x14] ; AudioDataIndex
00001a f0200001 BIC r0,r0,#1
00001e 6158 STR r0,[r3,#0x14] ; AudioDataIndex
000020 6958 LDR r0,[r3,#0x14] ; AudioDataIndex
;;;364
;;;365 /* Resume playing from the new position */
;;;366 I2S_CODEC_Play((GetVar_AudioDataIndex()));
000022 e8bd4010 POP {r4,lr}
000026 f7ffbffe B.W I2S_CODEC_Play
;;;367 }
;;;368
ENDP
00002a 0000 DCW 0x0000
|L19.44|
DCD ||.data||
AREA ||i.I2S_CODEC_Init||, CODE, READONLY, ALIGN=2
I2S_CODEC_Init PROC
;;;115 *******************************************************************************/
;;;116 u32 I2S_CODEC_Init(u32 OutputDevice, u32 Address)
000000 e92d4ffe PUSH {r1-r11,lr}
;;;117 {
;;;118 u32 count = 0;
;;;119
;;;120 /* Set the audio file address */
;;;121 AudioFileAddress = (vu32) Address;
000004 4c2d LDR r4,|L20.188|
000006 4605 MOV r5,r0 ;117
000008 60a1 STR r1,[r4,#8] ; AudioFileAddress
00000a 2024 MOVS r0,#0x24
00000c f88d0008 STRB r0,[sp,#8]
000010 2600 MOVS r6,#0
000012 f88d6009 STRB r6,[sp,#9]
000016 f88d600a STRB r6,[sp,#0xa]
00001a 2001 MOVS r0,#1
00001c f88d000b STRB r0,[sp,#0xb]
000020 a802 ADD r0,sp,#8
000022 f7fffffe 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 f7fffffe BL I2S_GPIO_Config
;;;128
;;;129 /* Read the Audio file to extract the audio data length and frequency */
;;;130 errorcode = AudioFile_Init();
00002a f7fffffe BL AudioFile_Init
;;;131
;;;132 if (errorcode < 3)
;;;133 {
;;;134 /* Turn on LD2 connected to PF.07 */
;;;135 GPIO_SetBits(GPIOF, GPIO_Pin_7);
00002e f8dfa090 LDR r10,|L20.192|
000032 62e0 STR r0,[r4,#0x2c] ;132 ; errorcode
000034 2803 CMP r0,#3 ;132
000036 d206 BCS |L20.70|
000038 2180 MOVS r1,#0x80
00003a 4650 MOV r0,r10
00003c f7fffffe BL GPIO_SetBits
;;;136
;;;137 return errorcode;
000040 6ae0 LDR r0,[r4,#0x2c] ; errorcode
|L20.66|
;;;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 e8bd8ffe POP {r1-r11,pc}
|L20.70|
000046 2101 MOVS r1,#1
000048 46a0 MOV r8,r4 ;141
00004a 88a7 LDRH r7,[r4,#4] ;141 ; i2saudiofreq
00004c 0388 LSLS r0,r1,#14 ;141
00004e f7fffffe BL RCC_APB1PeriphClockCmd
000052 f8df9070 LDR r9,|L20.196|
000056 4648 MOV r0,r9 ;141
000058 f7fffffe BL SPI_I2S_DeInit
00005c f44f7400 MOV r4,#0x200 ;141
000060 f8ad4000 STRH r4,[sp,#0] ;141
000064 f8ad6004 STRH r6,[sp,#4] ;141
000068 f8ad7008 STRH r7,[sp,#8] ;141
00006c f8ad6002 STRH r6,[sp,#2] ;141
000070 f8ad4006 STRH r4,[sp,#6] ;141
000074 f8ad600a STRH r6,[sp,#0xa] ;141
000078 4669 MOV r1,sp ;141
00007a 4648 MOV r0,r9 ;141
00007c f7fffffe BL I2S_Init
000080 2200 MOVS r2,#0 ;141
000082 2171 MOVS r1,#0x71 ;141
000084 4648 MOV r0,r9 ;141
000086 f7fffffe BL SPI_I2S_ITConfig
00008a 2101 MOVS r1,#1 ;141
00008c 4648 MOV r0,r9 ;141
00008e f7fffffe BL I2S_Cmd
000092 2318 MOVS r3,#0x18 ;147
000094 4622 MOV r2,r4 ;147
000096 2100 MOVS r1,#0 ;147
000098 b2a8 UXTH r0,r5 ;147
00009a f8c85028 STR r5,[r8,#0x28] ;147 ; CurrentOutputDevice
00009e f7fffffe BL CODEC_Config
0000a2 b128 CBZ r0,|L20.176|
0000a4 2140 MOVS r1,#0x40 ;152
0000a6 4650 MOV r0,r10 ;152
0000a8 f7fffffe BL GPIO_SetBits
0000ac 2003 MOVS r0,#3 ;154
0000ae e7c8 B |L20.66|
|L20.176|
0000b0 4621 MOV r1,r4 ;158
0000b2 4650 MOV r0,r10 ;158
0000b4 f7fffffe BL GPIO_SetBits
0000b8 2000 MOVS r0,#0 ;160
0000ba e7c2 B |L20.66|
;;;162
ENDP
|L20.188|
DCD ||.data||
|L20.192|
DCD 0x40011c00
|L20.196|
DCD 0x40003800
AREA ||i.I2S_CODEC_Mute||, CODE, READONLY, ALIGN=1
I2S_CODEC_Mute PROC
;;;325 *******************************************************************************/
;;;326 void I2S_CODEC_Mute(u32 Command)
000000 b510 PUSH {r4,lr}
;;;327 {
000002 4604 MOV r4,r0
;;;328 u32 tmp = 0;
;;;329
;;;330 /* Read the current value of the config register number 0x0E */
;;;331 tmp = CODEC_ReadRegister(0x0E);
000004 200e MOVS r0,#0xe
000006 f7fffffe BL CODEC_ReadRegister
;;;332
;;;333 /* Set the Mute mode */
;;;334 if (Command == MUTE_ON)
00000a 2c01 CMP r4,#1
00000c d102 BNE |L21.20|
;;;335 {
;;;336 tmp |= 0x20;
00000e f0400120 ORR r1,r0,#0x20
000012 e001 B |L21.24|
|L21.20|
;;;337 }
;;;338 else /* MUTE_OFF Disable the Mute */
;;;339 {
;;;340 tmp &= 0xD1;
000014 f00001d1 AND r1,r0,#0xd1
|L21.24|
;;;341 }
;;;342
;;;343 /* Write back the CODEC config register w/the new value */
;;;344 CODEC_WriteRegister(0x0E, tmp);
000018 e8bd4010 POP {r4,lr}
00001c 200e MOVS r0,#0xe
00001e f7ffbffe B.W CODEC_WriteRegister
;;;345 }
;;;346
ENDP
AREA ||i.I2S_CODEC_Pause||, CODE, READONLY, ALIGN=2
I2S_CODEC_Pause PROC
;;;206 *******************************************************************************/
;;;207 u32 I2S_CODEC_Pause()
000000 b510 PUSH {r4,lr}
;;;208 {
;;;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 480a LDR r0,|L22.48|
000008 f7fffffe BL SPI_I2S_ITConfig
00000c 4909 LDR r1,|L22.52|
00000e 2002 MOVS r0,#2
000010 6248 STR r0,[r1,#0x24] ; AudioPlayStatus
000012 6a48 LDR r0,[r1,#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;
000014 2000 MOVS r0,#0
000016 6308 STR r0,[r1,#0x30] ; monovar
;;;217 tmpvar = 0;
000018 6348 STR r0,[r1,#0x34] ; tmpvar
;;;218
;;;219 if (WAVE_Format.NumChannels == Channel_MONO)
00001a 4807 LDR r0,|L22.56|
00001c 88c0 LDRH r0,[r0,#6] ; WAVE_Format
00001e 2801 CMP r0,#1
000020 d103 BNE |L22.42|
;;;220 {
;;;221 /* Force the parity of the address */
;;;222 AudioDataIndex &= 0xFFFFFFFE;
000022 6948 LDR r0,[r1,#0x14] ; AudioDataIndex
000024 f0200001 BIC r0,r0,#1
000028 6148 STR r0,[r1,#0x14] ; AudioDataIndex
|L22.42|
;;;223 }
;;;224 /* Return the current data pointer position */
;;;225 return AudioDataIndex;
00002a 6948 LDR r0,[r1,#0x14] ; AudioDataIndex
;;;226 }
00002c bd10 POP {r4,pc}
;;;227
ENDP
00002e 0000 DCW 0x0000
|L22.48|
DCD 0x40003800
|L22.52|
DCD ||.data||
|L22.56|
DCD ||.bss||+0x64
AREA ||i.I2S_CODEC_Play||, CODE, READONLY, ALIGN=2
I2S_CODEC_Play PROC
;;;185 *******************************************************************************/
;;;186 u32 I2S_CODEC_Play(u32 AudioStartPosition)
000000 b510 PUSH {r4,lr}
;;;187 {
;;;188 /* Send the read command to the media */
;;;189 Media_StartReadSequence(AudioFileAddress + AudioStartPosition + 1);
000002 4c06 LDR r4,|L23.28|
000004 68a0 LDR r0,[r4,#8] ; AudioFileAddress
000006 2001 MOVS r0,#1
000008 6260 STR r0,[r4,#0x24] ; AudioPlayStatus
00000a 6a60 LDR r0,[r4,#0x24] ; AudioPlayStatus
;;;190
;;;191 /* Set Playing status to inform other modules about the codec status */
;;;192 SetVar_AudioPlayStatus(AudioPlayStatus_PLAYING);
;;;193
;;;194 /* Enable the I2S2 TXE Interrupt => Generate the clocks*/
;;;195 SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_TXE, ENABLE);
00000c 2201 MOVS r2,#1
00000e 2171 MOVS r1,#0x71
000010 4803 LDR r0,|L23.32|
000012 f7fffffe BL SPI_I2S_ITConfig
;;;196
;;;197 return AudioDataIndex;
000016 6960 LDR r0,[r4,#0x14] ; AudioDataIndex
;;;198 }
000018 bd10 POP {r4,pc}
;;;199
ENDP
00001a 0000 DCW 0x0000
|L23.28|
DCD ||.data||
|L23.32|
DCD 0x40003800
AREA ||i.I2S_CODEC_PowerDown||, CODE, READONLY, ALIGN=2
I2S_CODEC_PowerDown PROC
;;;398 *************************************************⌨️ 快捷键说明
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