C6747利用McASP发送中断方式完成音频输入信号的直接输出

yusijiangchengm

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：
main文件：
interrupt void interrupt4(void)  
{
  Uint32 sample;

  sample = input_sample(); // read L + R samples from ADC
6 R! S6 b! n0 U5 P  output_sample(sample);   // write L + R samples to DAC
  return;
}

int main( void )
{
# r+ B' u' E3 Y8 [8 E
    /* Initialize BSL */
    EVMC6747_init( );
        /* Call evmc6747_intr function */
    aic3106_init( );
        while(1);
}

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5 y% h: ?9 n! X; Y( N6 k5 X! daic3106_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
/* Initialize MCASP1 */
* T. q: R- g& x& x5 V. i3 Q    mcasp = &MCASP_MODULE_1;
    mcasp->regs->GBLCTL  = 0;       // Reset
. V3 F! q$ }) ~3 O- Q0 V    mcasp->regs->RGBLCTL = 0;       // Reset RX
    mcasp->regs->XGBLCTL = 0;       // Reset TX
    mcasp->regs->PWRDEMU = 1;       // Free-running
, U+ a" j' T* B5 [5 ~   // configure McASP0 receive registers
    mcasp->regs->RMASK      = 0xFFFFFFFF; // No padding used
2 r5 J5 [/ p" `: v    mcasp->regs->RFMT       = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
& Q$ O2 A) d: O7 R/ Z6 E* ?, W1 z9 c    mcasp->regs->AFSRCTL    = 0x00000112; // 2TDM, 1bit Falling, External FS, word
0 p8 m% E% h! M, O; m- ~7 ]6 J    mcasp->regs->ACLKRCTL   = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
5 \. ?: a& H4 P: _( G    mcasp->regs->AHCLKRCTL  = 0x00000000; // INT CLK (from tx side)
    mcasp->regs->RTDM       = 0x00000003; // Slots 0,1
! U! A2 U9 J* U" \    mcasp->regs->RINTCTL    = 0x00000000; // Not used
( {" E& w, ~% l8 B    mcasp->regs->RCLKCHK    = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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    mcasp->regs->XMASK      = 0xFFFFFFFF; // No padding used
7 A5 r5 l% Y# Q& o7 I    mcasp->regs->XFMT       = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
    mcasp->regs->AFSXCTL    = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
    mcasp->regs->ACLKXCTL   = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
    mcasp->regs->AHCLKXCTL  = 0x00000000; // EXT CLK
    mcasp->regs->XTDM       = 0x00000003; // Slots 0,1
    mcasp->regs->XINTCTL    = 0x00000020; // interrupt on transmit
) ^, N5 o/ ], l" N    mcasp->regs->XCLKCHK    = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
; H7 O0 c* p2 d: }8 @
    mcasp->regs->SRCTL5     = 0x000D;     // MCASP1.AXR1[5] --> DIN
    mcasp->regs->SRCTL0     = 0x000E;     // MCASP1.AXR1[0] <-- DOUT
0 l2 A3 T* r/ z) _* Q    mcasp->regs->PFUNC      = 0;          // All MCASPs
5 |! b: s+ a% F& @* G" {0 c& D& W    mcasp->regs->PDIR       = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1

    mcasp->regs->DITCTL     = 0x00000000; // Not used
    mcasp->regs->DLBCTL     = 0x00000000; // Not used
/ \! y' R( K" ]9 D+ O1 ~# z, N+ Z    mcasp->regs->AMUTE      = 0x00000000; // Not used
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/* Starting sections of the McASP*/
" H' d- O9 s5 C+ c) [# C    mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );  
3 F) b, T: |" C; F$ t    mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );

    mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
$ O( P* T0 E5 n! H& a    mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );

    mcasp->regs->XSTAT = 0x0000ffff;
2 l/ t% P$ i0 u' b    mcasp->regs->RSTAT = 0x0000ffff;
( Z; Z, j+ Z9 y/ V6 K0 L# J. R
7 t# v- F% \5 z    mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
: h' R4 B5 b9 U1 ?8 O9 ?; O    mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
0 \# [8 g* A3 P  T
    /* Write a 0, so that no underrun occurs after releasing the state machine */
    mcasp->regs->XBUF5 = 0;
    mcasp->regs->RBUF0 = 0;
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, R- v$ x. b+ j% p* [, P    mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
    mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
* V* V6 G$ Y2 R0 t
0 A$ o7 N' j" \1 J, ]% Q    mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
2 r  Z8 X3 E' }5 @% B4 n2 I    mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );

    CSR = 0x0000;
    INTC_INTMUX1 = 0x3d;
- w2 h( N. M2 \, k6 ]    ISTP = (unsigned int)vectors;
    ICR = 0xFFF0;  
5 M0 N5 F6 D% X" }! [    IER |= 0x12;  
    CSR |= 0x01;  

& B7 I+ Z3 N$ r# a2 i

. R+ I) y4 b2 b* j8 y7 l还有就是两个输入输出函数：
void output_sample(Int32 out_data)
{
* S! y) n1 T! a& n- G' m, c  AIC31_data.uint = out_data;  
  MCASP1_XBUF5_32BIT = AIC31_data.uint;
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: [- o! e0 E3 |; B2 L5 [6 w- {, k; RInt32 input_sample(void)
{  
  AIC31_data.uint = MCASP1_RBUF0_32BIT;
  return (AIC31_data.uint);
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human

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）