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：% n8 v( s# w" A7 b
main文件： 3 w% s5 ?3 H: \1 [interrupt void interrupt4(void) % d. T0 D7 |* r/ n& K, x1 R3 ]% w
{ 8 Q' z( e+ _+ K# f Uint32 sample; ) J- r) V2 L3 f+ c/ W C) [- ]" X9 r3 m7 p6 z& Z# ?
sample = input_sample(); // read L + R samples from ADC : e( j/ n! \! N5 V2 L7 s/ I6 { output_sample(sample); // write L + R samples to DAC % `- D6 W* o8 m# O
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int main( void )$ {# K! b8 u, G `$ D: ?
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' p' ~& q# q5 I, b m) b /* Initialize BSL */- F) `. X; H2 J+ t: \' k, h0 h& R
EVMC6747_init( ); & _" x" A! O& P /* Call evmc6747_intr function */, L+ C. h) `; \2 u9 J# X
aic3106_init( ); * M7 ~& g! |. j' F" {% m while(1); U4 B+ O, v3 ?3 @! A" I} ! q* {( X, |3 K* P9 w7 e; h# t% a7 @$ Z) f( ^1 W; P
% n2 C( V# T! \, Z& Xaic3106_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 $ u1 b5 F, G1 j/ q- J: \/* Initialize MCASP1 */3 Q8 S& ]4 F- q" g, K$ M
mcasp = &MCASP_MODULE_1; - b1 P% q; g2 V0 ?2 u mcasp->regs->GBLCTL = 0; // Reset 2 t5 d n' _5 D' {0 k mcasp->regs->RGBLCTL = 0; // Reset RX 4 J7 P) @/ y% V- V, P mcasp->regs->XGBLCTL = 0; // Reset TX5 ?& J1 {1 O# x6 m0 O
mcasp->regs->PWRDEMU = 1; // Free-running + l7 ]' I2 A) {8 O // configure McASP0 receive registers / a; s P9 [" v ]- q6 b9 @ mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used 7 v7 ^' I# [& r/ N* Q, e mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus 0 x) R, [6 A: Z mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word) W) X' D( ?/ U. b$ W6 O' e
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)# s+ O; h3 D% O6 Z
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)! h5 Q9 G8 i# w0 X9 r0 G
mcasp->regs->RTDM = 0x00000003; // Slots 0,13 g6 u6 d; o+ P+ l- f
mcasp->regs->RINTCTL = 0x00000000; // Not used* a$ x6 K& _; `2 B5 I' B/ O
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2562 L$ w- D4 ^' Y# o
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used ! u8 Y8 Z7 o" V1 a8 X7 A mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus7 @* ]: T0 N: D: V. M" |6 r2 m! I
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word ' x; Q4 \) p6 I4 h1 c( V$ l/ Y9 @- E mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16 2 `: [! q# _1 ~9 V# V1 s1 } mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK " d* B- i7 f( l" G( |4 P* k1 J mcasp->regs->XTDM = 0x00000003; // Slots 0,1( u6 F8 G* G, |+ T+ q
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit V; U$ T; X" m$ v7 {- |+ z
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256 . o1 d7 _) S: X2 O9 K+ K* D% ]: L" w! T
mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN, u5 x' y1 m5 ? j' K
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT : C& A! C% ^0 Z% x* m# s mcasp->regs->PFUNC = 0; // All MCASPs ; b3 f' v% u9 q1 f" v! K mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1 ) V" q3 V9 w9 T6 t7 r: N" i " ]5 Z$ }$ i* Q5 |* ^) C mcasp->regs->DITCTL = 0x00000000; // Not used v1 _$ B. l$ X J7 f mcasp->regs->DLBCTL = 0x00000000; // Not used + u7 ]: p6 W/ r8 K* t4 t mcasp->regs->AMUTE = 0x00000000; // Not used 8 ^9 P, k/ R, W% |2 l( A' ^" z' D, ~9 s" m* u2 I* g9 C
/* Starting sections of the McASP*/ 7 V; ?4 [4 Q2 u& l2 U4 O6 Y mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 9 x, o! @" B7 m while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 9 D! g+ n* G9 u! A; l mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; 8 X4 s" y# q% F. N( g4 z
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON ); # ?3 e. e9 K2 k# a& U, R0 e3 h/ N* G* r, q, k) Z
mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; ) I7 P) R4 S. J) G while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON ); ' v, j l. U4 _; w) y3 g# \ mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 0 i% Z5 l" c/ r' a
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON ); ( o) \8 ]5 a; M3 R' a4 c% _ 4 z$ o& T. h' J& v mcasp->regs->XSTAT = 0x0000ffff; ' U* k m7 d* o! @- q9 s5 Q
mcasp->regs->RSTAT = 0x0000ffff; ) s8 G3 i% ]1 G; Z% B! B
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON; , u" o) P3 c1 G while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON ); : [/ A( i% T) h mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 4 t g2 I; M6 z! @/ J
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );+ m( K Q- ]/ p
7 @- q4 I: O$ q5 N- g4 n /* Write a 0, so that no underrun occurs after releasing the state machine */ 3 b+ k0 Z z! w mcasp->regs->XBUF5 = 0;: U- l N; A1 \" Q& M! z
mcasp->regs->RBUF0 = 0;/ J; ~0 u% m1 E( z- }
3 K# @0 C% i& g mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 7 Q! T) Z6 H2 i5 M! m% G while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON ); % C# L% i6 L2 J+ e- w( u mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; $ } `1 l5 x! D- ?6 H3 ~' y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON ); # r$ L/ L5 j" l' U% p0 s9 ~0 R' a/ C0 G8 B, h; u9 u) F4 E
mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; + I$ T$ M' u" O9 ]8 X
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );1 s7 {4 K+ e& Z; r
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; ; ?8 R8 A" }2 A) k3 y) ^. P
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON ); 4 ~/ c5 H1 U& [4 k6 K, G0 m/ p" f' r + V2 j9 A+ b+ ?5 P6 B; n5 \: I1 L CSR = 0x0000; . N/ K6 v7 m' ~* D INTC_INTMUX1 = 0x3d; ; H5 y9 I% G& n' b ISTP = (unsigned int)vectors; - y$ m5 I8 N- `5 Q ICR = 0xFFF0; " A/ A4 i1 G0 x! g- H; N) h
IER |= 0x12; , _9 C# t2 T# ^. _2 ?2 N4 V CSR |= 0x01; 3 Y: S$ \6 q4 l4 o) \ ( `+ d9 @* z& G) F- M9 w8 M9 m2 ^0 L2 u; P% N/ Z) k
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还有就是两个输入输出函数：8 G9 n4 N1 o' R, l
void output_sample(Int32 out_data); I4 x P: T- x- q, H
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AIC31_data.uint = out_data; 8 P3 L# A% x+ H
MCASP1_XBUF5_32BIT = AIC31_data.uint; % D& M# R. e0 ~& y( J2 L}3 q; _3 m/ F$ d% N- v2 i7 i% G
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Int32 input_sample(void) # t% L! C0 {4 F9 i! c% i/ g{ : y! n0 f& G( a" W9 H- m" m- n AIC31_data.uint = MCASP1_RBUF0_32BIT;* Q; Z. e7 E$ w9 |. K5 D
return (AIC31_data.uint); ; n1 {* X& W( ` B% S: k" t} $ y7 x9 `: D: T4 M- q9 k, P# ]# s4 V( t/ 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）