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我现在正在测试AIC3254的环出:模拟信号进行A/D转换生成数字信号后,经过了一个均衡器,再进行D/A转化为模拟信号经过HeadPhone输出。调了几天了,都不通,不知道哪里有问题。 ================================================================================================================== 我的硬件是将AIC3254与DM8168的McASP[0]想连接。3254的MCLK由外部晶振提供,频率为24.576KHz。设置采样率为44.1KHz。计算时钟见下图。 ==================================================================================================== 我在PPS里的编程如下: ==================================================================================================== 我将生成的代码通过PPS写入评估板,评估板能正常工作。然后我把生成的寄存器数组(修改电源,时钟,接口,通道后)通过自己的程序写入3254芯片,却没有输出。 下面是我修改后的寄存器代码(自己修改的寄存器后都有注释/////////////): static const t_i2c_reg i2c_aic3254[] = [/*[[[*/ [ 0,0x00], // # reg[ 0][ 1] = 0x01 ; Initialize the device through software reset [ 1,0x01], [254,0x0A], [ 0,0x01], // # reg[ 1][ 1] = 0x08 ; Power up AVDD LDO; Disable weak AVDD to DVDD connection; Enable Master Analog Power Control, AVDD LDO Powered; Disable weak AVDD to DVDD connection [ 1,0x08], // # reg[ 1][ 2] = 0x00 ; Enable Master Analog Power Control [ 2,0xF0],//////////////// // # reg[ 1][ 71] = 0x32 ; Set the input power-up time to 3.1ms [ 71,0x32], // # reg[ 1][123] = 0x01 ; Set REF charging time to 40ms (automatic) [123,0x01], [255,0x00], [255,0x01], [ 0,0x00], // # reg[ 0][ 60] = 0x00 ; DAC prog Mode: miniDSP_A and miniDSP_D NOT powered up together, miniDSP_A used for signal processing [ 60,0x00], // # reg[ 0][ 61] = 0x00 ; Use miniDSP_A for signal processing [ 61,0x00], // # reg[ 0][ 17] = 0x08 ; 8x Interpolation [ 17,0x08], // # reg[ 0][ 23] = 0x04 ; 4x Decimation [ 23,0x04], // [ 15,0x03], // [ 16,0x88], // [ 21,0x03], // [ 22,0x88], [ 0,0x08], // # reg[ 8][ 1] = 0x04 ; adaptive mode for ADC [ 1,0x04], [ 0,0x2C], // # reg[ 44][ 1] = 0x04 ; adaptive mode for DAC [ 1,0x04], [ 0,0x00], // # reg[ 0][ 5] = 0x91 ; P=1, R=1, J=8 [ 5,0xA1],///////// # PLL is powered up;P=2;R=1 // # reg[ 0][ 6] = 0x08 ; P=1, R=1, J=8 [ 6,0x07],///////// J=7 // # reg[ 0][ 7] = 0x00 ; D=0000 (MSB) [ 7,0x0D],///////// D=3500(MSB) // # reg[ 0][ 8] = 0x00 ; D=0000 (LSB) [ 8,0xAC],///////// D=3500(LSB) // # reg[ 0][ 4] = 0x03 ; PLL_clkin = MCLK, codec_clkin = PLL_CLK, PLL on [ 4,0x43],/////////// // # reg[ 0][ 12] = 0x88 ; MDAC = 8, divider powered on [ 12,0x82],/////////M=2 // # reg[ 0][ 13] = 0x00 ; DOSR = 128 (MSB) [ 13,0x00], // # reg[ 0][ 14] = 0x80 ; DOSR = 128 (LSB) [ 14,0x80], // # reg[ 0][ 18] = 0x02 ; NADC = 2, divider powered off [ 18,0x08],/////////N=8 // # reg[ 0][ 19] = 0x88 ; MADC = 8, divider powered on [ 19,0x82],/////////M=2 // # reg[ 0][ 20] = 0x80 ; AOSR = 128 [ 20,0x80], // # reg[ 0][ 11] = 0x82 ; NDAC = 2, divider powered on [ 11,0x88],/////////N=8 ///////////////////////////////////// Audio Interface Settings [0x1b,0x0c],//////// # I2S;16bit;BCLK output;WCLK output [0x1c,0x00],//////// # Data Offset = 0BCLK [0x1d,0x03],//////// [0x1e,0x82],//////// [0x20,0x00],//////// [0x21,0x18],//////// [ 0,0x01], // # reg[ 1][ 51] = 0x40 ; Mic Bias enabled, Source = Avdd, 1.25V [ 51,0x40], // # reg[ 1][ 52] = 0x40 ; Route IN2L to LEFT_P with 10K input impedance; Route CM1L to LEFT_M with 10K input impedance; Route IN2R to RIGHT_P with 10K input impedance; Route IN1L to LEFT_P with 10K input impedance [ 52,0x55],///////// # Route IN1_L IN2_L IN3_L IN1_R to Input LEFT_P // # reg[ 1][ 54] = 0x40 ; Route CM1L to LEFT_M with 10K input impedance [ 54,0x40], // # reg[ 1][ 55] = 0x40 ; Route IN1R to RIGHT_P with 10K input impedance [ 55,0x55],//////// # Route IN1_R IN2_R IN2_R IN2_L to Output RIGHT_P // # reg[ 1][ 57] = 0x40 ; Route CM1R to RIGHT_M with 10K input impedance [ 57,0x40], // # reg[ 1][ 59] = 0x00 ; Enable MicPGA_L Gain Control, 0dB [ 59,0x00], // # reg[ 1][ 60] = 0x00 ; Enable MicPGA_R Gain Control, 0dB [ 60,0x00], [ 0,0x00], // # reg[ 0][ 81] = 0xc0 ; Power up LADC/RADC [ 81,0xC0], // # reg[ 0][ 82] = 0x00 ; Unmute LADC/RADC [ 82,0x00], [0x53,0x14],///////// # ADC_L Gain 10dB [0x54,0x14],///////// # ADC_L Gain 10dB [ 0,0x01], // # reg[ 1][ 20] = 0x25 ; De-pop: 5 time constants, 6k resistance [ 20,0x25], // # reg[ 1][ 12] = 0x08 ; Route LDAC to HPL [ 12,0x0a],///////// // # reg[ 1][ 13] = 0x08 ; Route RDAC to HPR [ 13,0x0a],///////// // # reg[ 1][ 14] = 0x08 ; Route LDAC to LOL [ 14,0x08], // # reg[ 1][ 15] = 0x08 ; Route LDAC to LOR [ 15,0x08], [ 0,0x00], // # reg[ 0][ 63] = 0xd4 ; Power up LDAC/RDAC w/ soft stepping [ 63,0xD4], [ 0,0x01], // # reg[ 1][ 16] = 0x00 ; Unmute HPL driver, 0dB Gain [ 16,0x00], // # reg[ 1][ 17] = 0x00 ; Unmute HPR driver, 0dB Gain [ 17,0x00], // # reg[ 1][ 18] = 0x00 ; Unmute LOL driver, 0dB Gain [ 18,0x00], // # reg[ 1][ 19] = 0x00 ; Unmute LOR driver, 0dB Gain [ 19,0x00], // # reg[ 1][ 9] = 0x3c ; Power up HPL/HPR and LOL/LOR drivers [ 9,0x3C], [ 0,0x00], // # reg[ 0][ 64] = 0x00 ; Unmute LDAC/RDAC [ 64,0x00], // # reg[0][82] = 0 [ 82,0x00], // # reg[0][83] = 0 [ 83,0x00], // # reg[0][86] = 32 [ 86,0x20], // # reg[0][87] = 254 [ 87,0xFE], // # reg[0][88] = 0 [ 88,0x00], // # reg[0][89] = 104 [ 89,0x68], // # reg[0][90] = 168 [ 90,0xA8], // # reg[0][91] = 6 [ 91,0x06], // # reg[0][92] = 0 [ 92,0x00], // # reg[0][84] = 0 [ 84,0x00], // # reg[0][94] = 32 [ 94,0x20], // # reg[0][95] = 254 [ 95,0xFE], // # reg[0][96] = 0 [ 96,0x00], // # reg[0][97] = 104 [ 97,0x68], // # reg[0][98] = 168 [ 98,0xA8], // # reg[0][99] = 6 [ 99,0x06], // # reg[0][100] = 0 [100,0x00], [0, 0xFF], ];/*]]]*/ static const t_i2c_reg miniDSP_A_reg_values[] = [ 。。。。 ]; static const t_i2c_reg miniDSP_A_reg_values[] = [ 。。。。 ]; |
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