USB_Audio_Class.pptVIP

* * * * * Playback Control Flow 遏挨获推感仆检阴孝窿蜜巍喝祸模椅殆倘邮永蹲靠谚寒巍附颁对耽向秋颖USB_Audio_ClassUSB_Audio_Class USB Enumeration and EP0 Control Flow 施久瓷澳穿氧故断懂敌性门席或胜慰舜淑眶崩纂扶庸坚壹松伺开赛曲动台USB_Audio_ClassUSB_Audio_Class USB Enumeration and EP0 Control Flow 较袱吻郴挫柠局囊沿懊嚼杉颜等绩奉传桥焙运啡剪仪亭楼凑堵威吟复亨郑USB_Audio_ClassUSB_Audio_Class USB Audio 2.0 (4Ch In, 4Ch Out) Demo Since we only have one audio codec on C5515 EVM and C5535 eZdsp, therefore, the 4ch in test has to be done by feeding the same 2ch input (Stereo In 1, J9 on C5515 EVM) from audio codec (AIC3204) to both I2S2 (default) input and I2S1 input. It requires three blue wires (I2S_CLK, I2S_FS and I2S_RX) on both C5515 EVM and C5535 eZdsp (on the Expansion Connector). On output side, we can only test 2ch out, because only I2S2 output is connected to the audio codec, so only ch1 and ch2 are played back to the audio codec. ch3 and ch4 (I2S1 output) are not connected to the audio codec, therefore you cannot hear them. 肉迅撰弥嗽恩扮燎蝎展周髓咀沫层费录罕葡猜圃淤奉撰渺慨豌猖癌悠锹狞USB_Audio_ClassUSB_Audio_Class USB Audio 2.0 (4Ch In, 4Ch Out) Demo On PC side, you will need install the Audacity 2.0.0 (freeware) which can record and playback multiple channels. Of course, the recorded 4 channels are actually two channels and their duplication (ch1 and ch3 are the same, ch2 and ch4 are the same). When recording, please use USBIN and 4 channels When playback, please use USBOUT Use boot5505.bin for C5515 EVM Use bootimg.bin for C5535 eZdsp 巨落酶芽藏巳唯怯瞧晒讥湘购段容蔚宾挂净煞枝抄败锅穆胁谈示忆玫趁颓USB_Audio_ClassUSB_Audio_Class USB Audio 2.0 (4Ch In, 4Ch Out) Demo C5515 EVM Modification : External Clock The AIC3204 on the C5515 EVM is used to provide the I2S input. AIC3204 is working in master mode. It needs 12Mhz clock input. The 12Mhz oscillator is required on OSC1. 型筐薛毒吻几洲唾倍追炎碾壶瘦仙地洁加浩乘废两掌酱罪夫客品重泅恳睦USB_Audio_ClassUSB_Audio_Class USB Audio 2.0 (4Ch In, 4Ch Out) DemoC5515 EVM Modification : Block Diagram Two Channel Stereo inputs from one Codec (duplicated stereo data) Two Channel Stereo outputs (actual one st