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 [打印本页] 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： ' ^/ O1 S; v2 X' `; P4 N2 s3 smain文件：/ I7 [7 }# S9 a* z7 H
interrupt void interrupt4(void) * m7 w0 Q5 }0 z{ 3 g3 `- I/ h$ ~8 `( m Uint32 sample; 3 H, g2 q+ g$ z# S2 J 2 j( W' n' ]( L( W) N8 C5 e5 X sample = input_sample(); // read L + R samples from ADC + T& P: v! [; e0 u* e# m output_sample(sample); // write L + R samples to DAC / ?" M4 X6 `1 P0 O$ v
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int main( void ), T0 t8 x: P8 f4 w) U- r; X
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/* Initialize BSL */ : j# C& f( p7 \( b EVMC6747_init( ); ( M _' K# ~4 e/ A0 \- Y /* Call evmc6747_intr function */ / d [0 `+ r. O; ]+ N* w aic3106_init( ); 0 T& W, }0 t/ A* T* |: ~ while(1); . |2 ^% U; ]2 K2 ~5 c* d6 u$ X} * z; c$ g- Z% Y0 t8 `% F& V0 R/ r - G. g& i/ S0 y3 M4 Q) L. K7 y$ J w0 l% v g. A
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/ |: v9 z$ I N
/* Initialize MCASP1 */ : _& K0 q! b& G: W! C mcasp = &MCASP_MODULE_1; " B: w0 t3 w: l! q mcasp->regs->GBLCTL = 0; // Reset: l( Y% Y- x; h7 p! u
mcasp->regs->RGBLCTL = 0; // Reset RX 3 J. P/ r2 F6 K. r1 ^ mcasp->regs->XGBLCTL = 0; // Reset TX 2 L/ z" L2 C# @: P. g, k mcasp->regs->PWRDEMU = 1; // Free-running5 F% O7 U+ K' M( w. g
// configure McASP0 receive registers : p6 E' G' Y# F2 y' k6 y) o mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used 1 i$ M* S' Q" P2 O mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus ; Z# W; r1 L, |1 b" [- [. H mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word ( [/ `, z8 l2 a mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)" b. B$ C. ^6 }! d4 ~ f9 C1 l8 {0 M
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side); h( K4 q9 m4 H. I" F
mcasp->regs->RTDM = 0x00000003; // Slots 0,1 # ]' D, F' R3 J' N: X6 e mcasp->regs->RINTCTL = 0x00000000; // Not used ( V! x: v8 [4 Q7 a1 k1 E mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256; @" }- J: B8 l' ^. d6 P9 `
! ~- Q6 p, Z6 X, {" w# L mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used% E/ v# i. i' k- ~! n7 p
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus& v+ `! Z" r8 [4 ~6 o1 [1 ?; y
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word8 h% E8 x, T2 p0 y" g) v7 w# e
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16# a7 o* ^, ^7 H
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK2 w- l7 c: A) Y6 {3 j
mcasp->regs->XTDM = 0x00000003; // Slots 0,1; G4 W9 K/ [1 C" l
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit , i) D/ \3 V4 b) U& K, g mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256 ) s+ k4 t. I5 J$ s8 W' @1 n. e) \# u3 p c- Q: W( l9 n6 m. h
mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN $ T& r" t7 K: Z2 M mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT ( j9 g5 J2 N. ?0 h# R% `, w$ n" q- S$ Y mcasp->regs->PFUNC = 0; // All MCASPs $ e$ O3 w) s2 X5 W2 P7 h2 Z7 R mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1: J7 I* ~; y: l/ S# r
1 |6 @0 h. o( T+ \( L! P mcasp->regs->DITCTL = 0x00000000; // Not used. {; W' k1 |9 W. j& _6 f% q8 X
mcasp->regs->DLBCTL = 0x00000000; // Not used ; q* Z* _$ Z/ @, R mcasp->regs->AMUTE = 0x00000000; // Not used7 S. p9 |6 G$ I( v- L& E4 \9 M
" w% Q! d3 Z0 E; C$ X5 G- S. j/* Starting sections of the McASP*/4 J9 n* E8 Y+ R7 i' I
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 2 Y( y" f$ J7 k; T( ^ while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); ; L/ X: b8 E/ f3 S+ F6 x1 \ mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; + @% P) W" a! y6 _( y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );5 _3 Z/ ~; W% c
& A9 X0 O. c/ w2 ^; A mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 0 H$ \9 L) Q9 Z- \0 w7 R while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON ); }; q* B f( l( a4 y! I
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 0 t z+ Q4 j: j/ G$ B; ] T/ t
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );4 M* v5 j+ F% X# v+ Y2 k
6 X+ w; f7 C; H- B mcasp->regs->XSTAT = 0x0000ffff; 1 w0 a5 _4 V, N+ k9 l0 h mcasp->regs->RSTAT = 0x0000ffff; 9 n B( ]3 G j) h4 w2 B' }6 j: \ , N2 a3 k0 E* x' |* [ mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON; 9 V5 ^/ ?; n4 ?* ~3 O- U while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );% ?% P( Z- [$ V. x) R) r
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; / ^& B! U1 c8 D6 L, a
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON ); 5 s& P4 t, x9 _, a& w * b1 V" v2 l$ U( a( m /* Write a 0, so that no underrun occurs after releasing the state machine */ ; K! \# I; o/ n" a4 }/ z& F mcasp->regs->XBUF5 = 0;3 C' R( k$ n5 z R
mcasp->regs->RBUF0 = 0; 7 h4 q0 g v9 c) [% R' l' R 4 v; z; R$ p( d% {* C" S8 A mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; , {4 P5 ?) H' s
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );" M! J3 g2 _- w4 X9 Q7 E
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; 7 r" m+ u5 V, b# ]( y% B
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON ); ( ^& J. C& ]1 x: s8 ` % L9 H% ], t2 p" U6 c mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; ; j( h9 E: k( k$ H while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );7 p! a% }/ J& Y+ ~
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; 0 i* n4 t6 x+ Z2 n P7 D7 H/ C
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON ); / g! M& g" \! t1 }, O. J9 b3 O + p3 E8 Y( u0 h$ d CSR = 0x0000;. q- W$ T4 H+ ^0 D9 H2 y+ w
INTC_INTMUX1 = 0x3d;1 L% ?3 F% I# O8 f. N
ISTP = (unsigned int)vectors; * L, \3 Z; r( }; F ICR = 0xFFF0; h9 `; a8 \1 i" J; e IER |= 0x12; 2 y% Q6 j1 m# v8 F9 Q CSR |= 0x01; - }# V( T- h+ @* p# T. z# d: E. O: y
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4 q" V) E& p: M还有就是两个输入输出函数：( S, C- Z% F' @9 `& s1 H. E! t* s* m
void output_sample(Int32 out_data) 9 V) o" a3 E# B1 c0 h{ ( h0 p8 F i k/ J+ @8 p AIC31_data.uint = out_data; " V3 t6 ~6 a2 U% F0 E
MCASP1_XBUF5_32BIT = AIC31_data.uint; ! [: G) ]6 S' y/ U}: X" o& |& x" @0 k8 T4 O
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Int32 input_sample(void)1 k5 S0 e. K$ L& \- F$ U, A9 b
{ ( z/ L. a8 }( T4 z AIC31_data.uint = MCASP1_RBUF0_32BIT;+ i& h8 I9 }. C5 ^+ v0 g
return (AIC31_data.uint);! w# O7 g* A. X* O* Q5 {( D
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$ i# b5 H( v5 {4 P$ m4 U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）