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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:
; v& g9 L" L7 d ^main文件:
; I& R) m+ `" k3 c* Yinterrupt void interrupt4(void)
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0 j# P8 ^& F. J5 z9 D _! z Uint32 sample;4 t0 O7 D, p7 X8 H
' L1 W7 Q2 \7 s1 z; E a sample = input_sample(); // read L + R samples from ADC
1 G( n' J* `2 S( z output_sample(sample); // write L + R samples to DAC
1 N3 b( d$ p7 }' B& T return;
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int main( void )
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/* Initialize BSL */" a3 h X$ K3 r* U
EVMC6747_init( );
* k3 {8 ~) g8 L# |( d9 H /* Call evmc6747_intr function */
" ]. H6 q4 A( y! A aic3106_init( );
- ^: e. n8 a4 z/ Y, n while(1);
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1 K" N% W. T5 ^# G I' a1 h6 B+ Vaic3106_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" Z# `6 Z3 I$ t2 W1 U4 j3 Y
/* Initialize MCASP1 */
) [5 [. W9 p2 D mcasp = &MCASP_MODULE_1;
2 e, [: q+ F, |% d mcasp->regs->GBLCTL = 0; // Reset
/ s; D* c/ w( J, C* t; d- p mcasp->regs->RGBLCTL = 0; // Reset RX
. a: L8 T- h3 p7 |# P mcasp->regs->XGBLCTL = 0; // Reset TX
4 M8 b6 ]: l- F& h ]# F: n4 x mcasp->regs->PWRDEMU = 1; // Free-running2 ]) C# C! I( q6 @+ Y7 Z3 B6 ~
// configure McASP0 receive registers8 b" @- X1 e1 P8 v
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
) Y% m: E. ?5 d: G mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
+ ] \& Y4 N5 J% k, k& Z; D- r mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
3 [' B; u8 {; V' Q2 z mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)6 r3 _' H$ z) [: d
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side): X. y e. C7 C; L2 R, `* F
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
3 @/ J. q' K/ {( p1 h. P9 p! ^, Q mcasp->regs->RINTCTL = 0x00000000; // Not used! e! D/ u8 O3 [4 [1 [8 | M' N
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used$ y4 K- A5 G5 O3 o" j: J
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus+ R* N2 [- b- b' L5 \
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word' ^0 f% N1 s( x/ q! l
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
: k8 [( q" a) p0 x) s mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
$ C, `% g5 R0 ~5 N" B! O mcasp->regs->XTDM = 0x00000003; // Slots 0,1; D; K" G$ I7 U+ L) x
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit* v8 A) h( ] P7 g
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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& Y! B- m" ?1 ~ T) A" n( h) | mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN$ e9 v0 v1 w( T$ X7 R
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT2 i/ K* R! [% _; _
mcasp->regs->PFUNC = 0; // All MCASPs. r* P. j- N& }" }; K' F
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX18 [! m1 A- P- z$ E& t7 L( M. L) g
! g5 z* N t) I( D. {" B mcasp->regs->DITCTL = 0x00000000; // Not used3 P+ P) n/ h; H5 O; {& B8 P, U
mcasp->regs->DLBCTL = 0x00000000; // Not used. z- E7 L, v: t" F7 x9 h" R
mcasp->regs->AMUTE = 0x00000000; // Not used! X8 s8 l X3 @, W+ B
; J9 V8 U7 G" x J( P/* Starting sections of the McASP*/
8 g( d* }5 X4 V# j. u% A( }5 l7 ~3 p mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; & y, K" m- E8 z" E, r4 D, ?
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); ! x4 ~: @3 q; v
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
. e" V }8 \8 |) s while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );1 g2 v$ z. k: C& m8 {$ p( s! m
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
7 F4 \8 G" B& u' y3 {; ?/ i while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );4 z% O; b+ v% w! o+ Z6 D8 x
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
! V' U3 Y0 `3 T- N; Y) t# l while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
" b4 b4 ]0 s$ B5 D/ \- [6 ~/ K& T' ?& ~( r
mcasp->regs->XSTAT = 0x0000ffff;
/ K1 k8 G+ `$ v mcasp->regs->RSTAT = 0x0000ffff;
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
$ H' d; ]9 G- |: r/ A while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
% n5 ~- `5 g- a) \ {6 W% x mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 9 O8 H! N( x, y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );' Y+ q+ B+ Y5 z: ]0 d+ K
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/* Write a 0, so that no underrun occurs after releasing the state machine */
& _! M1 G7 y7 I mcasp->regs->XBUF5 = 0;( v T, P( @/ z# p/ R- d$ Y) T
mcasp->regs->RBUF0 = 0;
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, r; Q; ?8 J3 M2 P, X7 B: _ mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
1 W0 @, M/ T3 W while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
4 o7 ]! y" C1 V9 n: ?6 J S! s. I, r+ M mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; # N) u% ?. c: ~5 S# P) ?. j. F
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
% Q a9 T' N6 q- x9 u while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
" v) U2 i7 N4 X0 D$ C mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
/ J* e! s+ E8 S3 V while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
) Z" g0 l" j* Q# p$ S INTC_INTMUX1 = 0x3d;
9 R) m& U8 N/ h) M4 X) R ISTP = (unsigned int)vectors;
, [# v/ w( [) I4 T7 y R7 k+ e0 ^) J ICR = 0xFFF0; 3 o/ ]' S8 X- W) |8 a% p
IER |= 0x12; / h$ T& B5 b- Q4 ~) i
CSR |= 0x01; . W2 r2 p. ?3 c# Q
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- w8 p. {6 D5 Y4 H+ a0 w' m还有就是两个输入输出函数:
0 H3 S1 h8 ~6 e: e5 {void output_sample(Int32 out_data), E! M) ^9 j6 t
{
) o) I, M; ^' X* \5 G3 `! H AIC31_data.uint = out_data; ' O X1 Q3 W; B6 [, V7 I
MCASP1_XBUF5_32BIT = AIC31_data.uint;1 @5 i, d2 H. s9 }) n" w
}
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! Q* T( a& d1 @/ E3 D# r" _Int32 input_sample(void)& q# U( y$ p G. b& Q
{
& a# r* s' v, X4 O AIC31_data.uint = MCASP1_RBUF0_32BIT;
0 q& u. x0 y- L5 G5 U return (AIC31_data.uint);
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