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：
! o! r  ~5 s  R  x4 T( Omain文件：
* }: n# p1 A8 ~4 `! ^% f1 Rinterrupt void interrupt4(void)  
{
  Uint32 sample;

& M* V" ^0 s9 D  r4 q/ c/ v3 c  sample = input_sample(); // read L + R samples from ADC
2 C1 k  Z; T0 {  output_sample(sample);   // write L + R samples to DAC
  return;
}
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. ]* \9 N4 x$ g6 b0 G) [int main( void )
{
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    /* Initialize BSL */
* e, a7 T6 O6 C7 o+ t7 L) R    EVMC6747_init( );
& X& {6 r0 {( R$ {5 J% A6 e8 l        /* Call evmc6747_intr function */
    aic3106_init( );
7 Z2 U9 O& ^+ `: l) f        while(1);
}
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- I6 B/ T; s0 S' G3 U' ^; \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
: B/ B" C- E2 `/ M' S/* Initialize MCASP1 */
    mcasp = &MCASP_MODULE_1;
( J% o# M! b4 S% h4 o# M+ c" L4 g* \    mcasp->regs->GBLCTL  = 0;       // Reset
) v) J2 h/ E* b$ B/ A( N    mcasp->regs->RGBLCTL = 0;       // Reset RX
    mcasp->regs->XGBLCTL = 0;       // Reset TX
    mcasp->regs->PWRDEMU = 1;       // Free-running
$ V9 Y; j" k, H, T   // configure McASP0 receive registers
) a" @0 O8 L. H0 @% A    mcasp->regs->RMASK      = 0xFFFFFFFF; // No padding used
7 g( @: o4 D# {5 x* f$ N' h: _2 a    mcasp->regs->RFMT       = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
    mcasp->regs->AFSRCTL    = 0x00000112; // 2TDM, 1bit Falling, External FS, word
) w- h' _6 c2 J) \6 o    mcasp->regs->ACLKRCTL   = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
6 I% h& n3 t, B% ]    mcasp->regs->AHCLKRCTL  = 0x00000000; // INT CLK (from tx side)
    mcasp->regs->RTDM       = 0x00000003; // Slots 0,1
    mcasp->regs->RINTCTL    = 0x00000000; // Not used
    mcasp->regs->RCLKCHK    = 0x00FF0008; // 255-MAX 0-MIN, div-by-256

/ C  f% M( h# w- U5 O    mcasp->regs->XMASK      = 0xFFFFFFFF; // No padding used
9 }9 v' R! p" G8 V4 E    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
- Z* K6 m% |& F% w! h' N( P, g    mcasp->regs->XTDM       = 0x00000003; // Slots 0,1
9 _: J, n2 ]/ a* x! P: w+ ]/ P* F7 _    mcasp->regs->XINTCTL    = 0x00000020; // interrupt on transmit
1 f9 s& x  L5 g" V, e" g0 p    mcasp->regs->XCLKCHK    = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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9 G9 q0 x+ `' X  u" F0 w    mcasp->regs->SRCTL5     = 0x000D;     // MCASP1.AXR1[5] --> DIN
0 M. ]* Z3 k) m, [! G# m    mcasp->regs->SRCTL0     = 0x000E;     // MCASP1.AXR1[0] <-- DOUT
    mcasp->regs->PFUNC      = 0;          // All MCASPs
    mcasp->regs->PDIR       = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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    mcasp->regs->DITCTL     = 0x00000000; // Not used
    mcasp->regs->DLBCTL     = 0x00000000; // Not used
    mcasp->regs->AMUTE      = 0x00000000; // Not used

2 T7 D/ |+ O# t/* Starting sections of the McASP*/
    mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
8 z! Y! G9 R& V1 z9 d    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );  
" W1 V% K% H9 x5 n* W2 \8 T7 T    mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );

    mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
0 ~  K, S4 S, P( m- \& b    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
    mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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# y+ e, H, Y, s5 A5 J$ h8 v% Y+ i. x    mcasp->regs->XSTAT = 0x0000ffff;
" D/ H6 Q0 h' g0 M    mcasp->regs->RSTAT = 0x0000ffff;

) Y; X, V( b; Q- M    mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
7 Q6 [, @5 q2 y. b- y- Z" H4 g! q    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
    mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
0 B- j2 R$ n9 ?' f( R: W    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
: m$ R0 @# S' D  n% c" ]
    /* Write a 0, so that no underrun occurs after releasing the state machine */
* K6 o( U$ K9 {7 b7 x. k    mcasp->regs->XBUF5 = 0;
6 S! `& T  H0 D+ @    mcasp->regs->RBUF0 = 0;
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& `1 s2 M3 X) n! D. d/ [    mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
+ i; [- k- w& a8 t; a5 o: r: y    mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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    mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
5 u0 \8 o7 L# {: }0 ^7 W    while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
    mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
    while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );

4 M4 E9 [! }! N8 L$ w3 k+ ~    CSR = 0x0000;
    INTC_INTMUX1 = 0x3d;
    ISTP = (unsigned int)vectors;
6 u) }' p( @( ?9 ^5 H+ |) C4 p. ]    ICR = 0xFFF0;  
    IER |= 0x12;  
. a. I. w- H/ u6 F3 Y4 B+ b- P    CSR |= 0x01;  
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8 @0 C% R6 d, u+ t还有就是两个输入输出函数：
) o: f+ U: Z! z$ z: l5 J2 G5 \void output_sample(Int32 out_data)
{
  AIC31_data.uint = out_data;  
# T" _% V- X2 B( w6 S1 f  MCASP1_XBUF5_32BIT = AIC31_data.uint;
}
* ^  W. P7 Q1 M6 {
Int32 input_sample(void)
{  
  |5 p# C. L9 R$ n# H/ ]  AIC31_data.uint = MCASP1_RBUF0_32BIT;
  return (AIC31_data.uint);
}
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