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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:3 X, D/ q+ N7 @0 \" q
main文件:- |2 l" d" U/ N2 ^
interrupt void interrupt4(void) : u( Z7 `# k5 ]5 d$ @* o$ W
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Uint32 sample;
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9 i+ c3 x# E; `: C) C- G Q; z sample = input_sample(); // read L + R samples from ADC) ]1 Q& P4 {3 K: B1 ?
output_sample(sample); // write L + R samples to DAC . ?' p. d5 a4 P$ D
return;
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int main( void )
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/* Initialize BSL */
7 L! k8 }4 r6 \ q6 g( f EVMC6747_init( );
6 h2 S0 C8 M8 V* Q- w2 `; h6 | /* Call evmc6747_intr function */5 w" o! {0 [( C5 B J
aic3106_init( );
% ^- Z/ J: m) L& U6 _ while(1);) Q) { Q0 O1 X1 p( k
}
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* c1 ~$ t5 h) O6 ^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1 U5 t+ ]! Z8 ~% U7 h7 j
/* Initialize MCASP1 */
4 f5 u, q) k. G/ x( D mcasp = &MCASP_MODULE_1;
" J& L( K7 w" X5 U: ^ mcasp->regs->GBLCTL = 0; // Reset! X+ x7 h3 A: K6 j( y5 j) O }3 G
mcasp->regs->RGBLCTL = 0; // Reset RX' N& F: j- X- @' Z
mcasp->regs->XGBLCTL = 0; // Reset TX9 P/ K: `' [4 |; l/ r
mcasp->regs->PWRDEMU = 1; // Free-running
- ~, n$ Z1 h- o9 V // configure McASP0 receive registers8 z9 g. O4 `9 b- Y& I# f8 G2 h
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used9 z# o$ C- m; s. A' J7 H
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
; s6 H! u- a5 X% _8 ~ mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word3 A: o, V. n4 r3 S1 }
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)" y F0 e- c7 a$ c; |/ [: c
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)2 B) a" u& U/ l7 T
mcasp->regs->RTDM = 0x00000003; // Slots 0,19 p3 D' y: S- M. n; _& v
mcasp->regs->RINTCTL = 0x00000000; // Not used
7 M, d! K) g% P$ R3 J# }& s% y mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256( T5 a; C( c) Z
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
0 k* p2 m0 C* d( c9 w1 m# a mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus: ?' ?0 R; l' x, |9 U9 g8 x7 Z( m
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
. l- ?0 V+ \, t mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
3 O4 q1 `$ |/ q/ R Q7 z) {, [ mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK- i6 C9 i- A* p u# }: L6 A
mcasp->regs->XTDM = 0x00000003; // Slots 0,14 k2 a. G, q; q8 {. [
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
- f, E" e B" E" F mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2566 u2 l9 P, G( C: u3 e$ `
: M( ^* a$ R1 r8 }% `3 b, U mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN+ S! K3 Q6 x% U& j
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
0 _) M! W& N* z7 Y. \ mcasp->regs->PFUNC = 0; // All MCASPs7 @- x4 D% Y( r4 g
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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4 v3 m, l" ]9 ^, D5 o% M mcasp->regs->DITCTL = 0x00000000; // Not used
3 ?0 {! T: a: n S% ~ n8 u mcasp->regs->DLBCTL = 0x00000000; // Not used( d# l% j. L$ |" v
mcasp->regs->AMUTE = 0x00000000; // Not used+ o: _) J- v5 p1 X& v% h0 {* |
: ]3 `4 Y6 H; d1 v( O/* Starting sections of the McASP*/
# k7 r4 x: E) v: b4 o% w mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
9 K4 L% p: h+ Z6 G- I while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
o* A$ V& u0 W( v5 e mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; 5 U' {: [: Y: o6 y. a
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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3 U# _* v6 _3 M: [+ C mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
1 l: {' _. v( W, S) n6 @' B4 F while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
# y5 `( Z( f W7 N0 g1 S8 ^4 n mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; * o3 @+ c6 N% T9 b( z
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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1 m# z! P5 e9 T. [4 `+ o% k0 F/ a- F mcasp->regs->XSTAT = 0x0000ffff;
0 V7 m h0 y* C2 u% n) a mcasp->regs->RSTAT = 0x0000ffff; 6 z# A! N" V& m3 t* Q1 S( g8 v
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;0 `' R" q" ^9 j
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );$ _7 I: A$ U R: h8 y; W
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; $ c8 x$ ] w A! E
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 */
+ h" p/ v1 K$ S1 z# j2 f, ?; ]( ` mcasp->regs->XBUF5 = 0;
% l: d& _" F' G: y mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; " z6 {3 T) ]4 x9 u6 X3 M8 X+ }
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );. N. K1 X; u% Q2 _8 J2 ]2 s5 Z
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; ; M$ j2 ~9 Z- }) n3 t
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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' A3 e/ d1 x% I+ j! n1 B% { mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 9 t4 o2 J# w& s
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
' V1 a# g( Y7 a1 C% D: P$ Z8 J mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
% G! e. x7 C2 Z1 S+ e while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );1 `( S+ Z+ ~( F8 q, T( |, o# M- V
% b+ F% l; H2 A8 N7 \, \ CSR = 0x0000;
2 N( X# C7 Y8 X INTC_INTMUX1 = 0x3d;8 Y+ D( @. n$ ]- ]& ~/ e
ISTP = (unsigned int)vectors;6 v1 p; D) q" [- F. L% U; V$ k
ICR = 0xFFF0; % f3 P5 A9 g! q: s9 E" C1 M
IER |= 0x12;
3 N8 N; z3 P6 k" w) B0 E& z g CSR |= 0x01;
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还有就是两个输入输出函数:' R- D- u1 H- B2 Q* a! r
void output_sample(Int32 out_data)
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& r2 K% \1 S* K9 C6 j9 d: s$ l: L AIC31_data.uint = out_data;
5 p7 m7 d! _* q MCASP1_XBUF5_32BIT = AIC31_data.uint;
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Int32 input_sample(void)! F+ K2 S3 m* P2 }) |9 e, T J; c
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
1 K5 U7 P3 q1 x: ~: i; R return (AIC31_data.uint);
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