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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:
! F6 i) ?4 f/ q+ _main文件:* K' u! V: q1 D) u' i, ~- H# d- l
interrupt void interrupt4(void) ( E4 R$ h* j% k! f2 `
{
8 l0 T2 h: ?* \4 W _9 o Uint32 sample;: S& `: W/ q* A) G" O
0 Y$ k$ t0 o1 F' O sample = input_sample(); // read L + R samples from ADC
- f* V$ V( Q5 p& H' `$ L. E( a* w& K- E) h output_sample(sample); // write L + R samples to DAC 2 J# p2 n7 j. V8 x: l+ e" G' c
return;
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int main( void )
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! H9 h! y- G! e) M /* Initialize BSL */
# Y5 A0 |: M: f+ P7 M3 Z EVMC6747_init( );
# e6 q* c7 Y. Z3 @( r! o7 f9 { /* Call evmc6747_intr function */* _1 a/ d( B) c' U; U
aic3106_init( );0 e' @! d6 x1 x
while(1);5 Q% o9 r0 r% a2 P* G" T
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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 J& ]7 ~: J) k
/* Initialize MCASP1 */9 u5 U6 J# f: e6 \( q M
mcasp = &MCASP_MODULE_1;
' Y5 v/ l2 A% e% M! }2 ?! C& P mcasp->regs->GBLCTL = 0; // Reset' L2 @6 F8 n. n4 K, t4 b
mcasp->regs->RGBLCTL = 0; // Reset RX
3 B/ ^$ E/ g; `4 X9 K" I* c2 X mcasp->regs->XGBLCTL = 0; // Reset TX @9 [$ E$ ~9 s5 g# `1 ~
mcasp->regs->PWRDEMU = 1; // Free-running$ [+ |+ Q9 i$ }/ s1 s! }% q! V
// configure McASP0 receive registers
" w X1 C; p( Y. | mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
+ y. l+ I) {* n% ] mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus) Z+ J' x% |5 `# C" P3 a' F1 h
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word0 T" Y9 z+ ]( d1 L8 f
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
4 J3 ?1 r. o2 W7 s5 K* N mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
7 c7 Y( x% m) a7 T1 Y2 e mcasp->regs->RTDM = 0x00000003; // Slots 0,1: ^+ ^8 E- r' x1 ~" U5 D
mcasp->regs->RINTCTL = 0x00000000; // Not used
" }( b2 r, y5 p/ ~8 t8 f" f0 y mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
! C& S: q h$ ]) F3 M0 B. c mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus( }( J# L) P/ |/ H6 h9 ]
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
6 Z" k- Y d6 Q/ Z* u) E# s6 K* T mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
% C# D! J0 r. W( [, }) \ G mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK5 R" c7 |3 F- m/ X
mcasp->regs->XTDM = 0x00000003; // Slots 0,1. N1 d+ g' P7 S1 q# ^
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit- |- w/ K2 M0 {$ _ {( I. `6 C
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256' m4 a) ?5 B6 W) s2 ?$ Q
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN1 S/ X9 g7 t2 G; o8 A
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT7 j0 ^: v; x) Y+ u6 F2 n/ w
mcasp->regs->PFUNC = 0; // All MCASPs$ y6 p5 w' `: k
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used
8 j1 d7 {* Q! a. V4 P" T! P8 i2 [/ B mcasp->regs->DLBCTL = 0x00000000; // Not used
2 ?* P& z/ a+ L# q: w$ n1 L9 Q mcasp->regs->AMUTE = 0x00000000; // Not used
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7 `5 b: X0 ~, s3 _. c/ A/* Starting sections of the McASP*/
( G8 H$ m1 M0 }- j6 g3 Z+ ~ mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 3 `: t2 R2 t8 p" C7 O' v
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 3 l. r; X, q$ {$ _8 I
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; 2 b5 q7 ]) d% S( u: F# c
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );7 ~. U6 A" t9 v. i6 O& R
: T( C ^% T( d% [ U; L mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
1 a/ ~: R6 H* [/ m8 U while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
# \2 _ l( d o- G6 i) _; d8 m mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; # s- K, ?( _4 {: \$ n+ k- l, f3 A
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );2 i' E3 v6 H6 m; H3 a1 x/ W
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mcasp->regs->XSTAT = 0x0000ffff; 2 H$ t% E) o) ~" `4 V! `
mcasp->regs->RSTAT = 0x0000ffff;
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
2 y) {! [/ c+ B while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );8 d3 D( ]: B# P2 n9 n
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; * A( i' x b& Z- d
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );4 D9 A1 r9 {8 p" H1 ^* e
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/* Write a 0, so that no underrun occurs after releasing the state machine */" q) }7 H3 u; \6 ~+ d' J; C
mcasp->regs->XBUF5 = 0;
6 U' @% G z$ g mcasp->regs->RBUF0 = 0;
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N" U5 K( Q% j7 ~. F* S mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; + h3 R& k3 F) I5 Y
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
, y$ W+ D, C6 {0 _' b mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
& }: q8 ^: w! O2 F0 K% F1 F while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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' y% x$ P. R7 ^/ W mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; f* k0 \# t2 d# ]" O7 g7 A
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );" G8 X& T0 n2 p8 P+ K( B( S
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
( f; U% y6 O' _5 a0 q while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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2 \$ [( x7 A: y2 }# W% P6 C, M# { CSR = 0x0000;5 \$ r/ u% h% X! _. n( n
INTC_INTMUX1 = 0x3d;+ H/ ~# U- r; e, o
ISTP = (unsigned int)vectors;
+ ?9 T: A, u. P v* @7 }7 r ICR = 0xFFF0;
2 J% {- m' y- u) b IER |= 0x12;
' [4 X! G8 Y7 N+ R CSR |= 0x01; 9 n: w/ d& a0 I6 W
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( _* j( T' c$ e, ]$ T4 D, {还有就是两个输入输出函数:/ J5 Z) @$ d" R0 \
void output_sample(Int32 out_data)
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/ T% O! b! l! h5 | B AIC31_data.uint = out_data;
" M7 o# V; n' S MCASP1_XBUF5_32BIT = AIC31_data.uint;! R, s! o+ e% Z% _+ l1 ]2 j
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7 Z* k( Y3 x7 m( s) aInt32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;, ]) M9 U) k' l1 ?0 g
return (AIC31_data.uint);
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