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标题:
C6747利用McASP发送中断方式完成音频输入信号的直接输出
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作者:
yusijiangchengm
时间:
2016-3-15 16:07
标题:
C6747利用McASP发送中断方式完成音频输入信号的直接输出
C6747和C6748感觉差不多，我想实现McASP发送中断方式控制音频信号，在轮询的例程基础上改的，轮询程序可以实现，但是中断一直实现不了，也找不到错误，求大神帮忙！下边是主要程序：
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main文件：
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interrupt void interrupt4(void)
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{
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC
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output_sample(sample); // write L + R samples to DAC
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return;
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}
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int main( void )
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{
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/* Initialize BSL */
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EVMC6747_init( );
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/* Call evmc6747_intr function */
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aic3106_init( );
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while(1);
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}
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aic3106_init文件的一部分，McASP配置部分，采用内部时钟，I2S方式，同步传输。音频芯片的配置应该没问题
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/* Initialize MCASP1 */
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mcasp = &MCASP_MODULE_1;
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mcasp->regs->GBLCTL = 0; // Reset
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mcasp->regs->RGBLCTL = 0; // Reset RX
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mcasp->regs->XGBLCTL = 0; // Reset TX
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mcasp->regs->PWRDEMU = 1; // Free-running
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// configure McASP0 receive registers
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mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
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mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
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mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
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mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
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mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
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mcasp->regs->RTDM = 0x00000003; // Slots 0,1
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mcasp->regs->RINTCTL = 0x00000000; // Not used
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mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
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mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
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mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
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mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
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mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
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mcasp->regs->XTDM = 0x00000003; // Slots 0,1
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mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
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mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
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mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
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mcasp->regs->PFUNC = 0; // All MCASPs
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mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used
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mcasp->regs->DLBCTL = 0x00000000; // Not used
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mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
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mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
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while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
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mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
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while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
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while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
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mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
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while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff;
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mcasp->regs->RSTAT = 0x0000ffff;
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
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while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
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mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
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while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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/* Write a 0, so that no underrun occurs after releasing the state machine */
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mcasp->regs->XBUF5 = 0;
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mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
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while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
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mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
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while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
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while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
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mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
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while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
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INTC_INTMUX1 = 0x3d;
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ISTP = (unsigned int)vectors;
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ICR = 0xFFF0;
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IER |= 0x12;
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CSR |= 0x01;
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还有就是两个输入输出函数：
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void output_sample(Int32 out_data)
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{
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AIC31_data.uint = out_data;
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MCASP1_XBUF5_32BIT = AIC31_data.uint;
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}
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Int32 input_sample(void)
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{
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
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return (AIC31_data.uint);
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}
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作者:
human
时间:
2016-3-16 11:55
可以参看创龙提供的例程：AUDIO_LINE_OUT_INTR——Line Out 音频输出（中断方式）
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