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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:, N/ P. c7 S4 h6 O: P; Q
main文件:
# h' r! s/ |- |! K0 Q, ^interrupt void interrupt4(void) ' A" G g& U8 _' a& z5 i
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC
4 Q; N+ s3 d! ]1 R# |/ o% s output_sample(sample); // write L + R samples to DAC
m9 Y, n5 M& ]9 @8 n return;
9 U* y8 p+ r3 T, x. d}
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int main( void )
* q9 ?0 g l" O. l# W' E& m{
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; l' \2 S0 A" y$ s; Q. d, J: p /* Initialize BSL */! A* r8 c9 {, P7 F
EVMC6747_init( );. Z- H. d& ]9 y
/* Call evmc6747_intr function */; Q& B0 b0 `. \7 v8 O
aic3106_init( );6 i( H6 U E9 `; ~4 ~* s' y
while(1);
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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' y1 F% K D: U' Y4 H
/* Initialize MCASP1 */
' E6 q: X2 N' y mcasp = &MCASP_MODULE_1;' u1 c0 P, ~- k$ W. q/ {
mcasp->regs->GBLCTL = 0; // Reset+ K. `( D0 Z! N- d+ ~( V) o
mcasp->regs->RGBLCTL = 0; // Reset RX7 q8 T% r8 c- E- K$ r+ x) g
mcasp->regs->XGBLCTL = 0; // Reset TX7 {& d$ t: [( _& N# i) I! }! L
mcasp->regs->PWRDEMU = 1; // Free-running; \. i7 Z& M. {5 O/ F. c5 ~
// configure McASP0 receive registers# Q( Q; }8 q& P8 H$ N- }9 R
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used- f* S$ ?; _1 E- }" f# r
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus0 @. _4 u% m! c% q4 k$ W8 r) u
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word: Y% K2 j% S3 {3 I$ g( T2 P. ^
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
; E" o/ f1 i8 a mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
' a6 M i W: W5 Z mcasp->regs->RTDM = 0x00000003; // Slots 0,1! N9 s% W8 V" p. g! |' X( y
mcasp->regs->RINTCTL = 0x00000000; // Not used) j- `+ c/ D9 w
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256: M( z6 `2 W' M* Y; G! }
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
- |1 f1 S( h, L5 Z mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
3 R* A Q" ?- R) Y4 i5 O mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word% N: O) l- V W
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
9 F* i* |* M1 D1 _ @( c }% e mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
' J0 f$ t3 X0 ]( D" _" h mcasp->regs->XTDM = 0x00000003; // Slots 0,1
) p2 l7 R' g! K mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
! I5 D9 c3 M7 ~' o mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256" h& j7 G5 T: d1 G
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN& v$ J* M! |/ D# S$ m9 @2 |" o
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
$ s# m0 @$ k6 Q: a3 U mcasp->regs->PFUNC = 0; // All MCASPs
# V o, w# v* l3 g, Z6 \( c mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used
6 b* T4 _5 i7 v& G" O9 [& S/ _ mcasp->regs->DLBCTL = 0x00000000; // Not used5 Q9 Z. ]; K( N
mcasp->regs->AMUTE = 0x00000000; // Not used; g K+ ]+ X7 ^9 k2 c
( V/ ~4 @3 Z K. ~- L4 Q: ?0 F m; j/* Starting sections of the McASP*/
7 S5 K6 X4 n7 w) K mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
0 I9 b$ `( C* x Y while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
% L5 }, A0 Z1 a- @' W mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
/ W5 }/ i+ ~" l; _* Y' C while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );8 ], ]" g, U0 m# P" w
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 0 k( X* z# }' J! k
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
8 `( u) \( d" t' h mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
: \- r4 g% W" c. Y, h while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff; 3 S9 k& A) d# r; V7 z( [! Y
mcasp->regs->RSTAT = 0x0000ffff;
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C- `: R6 u2 U/ J$ T6 I mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
) R! n0 z. r' c+ t. R while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );- \- k e1 Q, I$ z& Q. {* h$ t
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; , J" L0 r" |# Q. P ~
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );7 s/ E. m# L' n/ u
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/* Write a 0, so that no underrun occurs after releasing the state machine */! F5 V, P5 `5 e" W& f, F$ O9 ]+ N9 t0 E
mcasp->regs->XBUF5 = 0;
8 N( D) r& ^' b+ q3 k mcasp->regs->RBUF0 = 0;+ `# x: j. l3 v% `" S; s
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
6 J# ~8 c* l- N6 e& ?0 u while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );6 Y: q; Y8 L4 m
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; 8 w9 j3 ~/ d# v+ x7 ?' a3 j5 K: P9 z
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );7 D9 f; Q" c: ^. u
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
2 j2 r' T! o- s4 g# D3 ]# L; u* z8 m7 R while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
5 x N+ J6 ^$ H, W3 V p mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
! U% b r7 n$ {$ F. B1 u7 y& Q2 X1 `9 y while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
, i5 G v0 y$ N$ t2 a. c2 A% h INTC_INTMUX1 = 0x3d;
) d# K& D" ~2 f7 S1 L) r u2 S ISTP = (unsigned int)vectors;
M. F$ e2 }# k/ B @" m+ W ICR = 0xFFF0; ! `' X! L8 ~ k6 X. F6 ~6 b
IER |= 0x12; 6 _ C# y) W8 Q* E. [$ [* ]" d
CSR |= 0x01; 9 s; b# m7 @1 E' y/ a
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7 [- M) q6 _* S7 J9 `: G R还有就是两个输入输出函数:
! ~4 S( a- k* B6 Z' {0 R8 svoid output_sample(Int32 out_data)
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( d- ~" g1 t# s/ b/ A AIC31_data.uint = out_data;
# _* f' x+ {' l' P' O MCASP1_XBUF5_32BIT = AIC31_data.uint; L, @/ Z+ k7 k# ?! [9 U
}
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$ Y5 @8 L Y* d: q3 aInt32 input_sample(void)7 k' A0 i% g6 l# j
{
% B$ H: O. m& i: ?% K AIC31_data.uint = MCASP1_RBUF0_32BIT;
% J2 w2 a" [3 h6 e& A- |! G return (AIC31_data.uint);
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