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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:
. v6 t9 U. K3 q) nmain文件:. s) g$ a1 }# | |
interrupt void interrupt4(void)
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C2 b; k) Q) X( @4 I* G: _* v' p0 r Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC8 R% a5 i+ l g- T4 ~' ~7 i
output_sample(sample); // write L + R samples to DAC , \: q* g* {+ k4 v# p7 Z
return;
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6 c+ j: a2 p. a* c( T5 `; [3 A9 _' Qint main( void )
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0 b' o ~0 Y$ ^ /* Initialize BSL */2 J# n1 W. Q) t0 m
EVMC6747_init( );8 W5 O2 Y! q. |& A
/* Call evmc6747_intr function */
+ q2 R& r3 @" W" K( @ aic3106_init( );/ d6 h9 u! X+ z2 w/ g
while(1);% s% m8 Q/ C6 ]1 ^! O7 m) v! f
}
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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; u( \9 C+ [- {/ M; V; f3 \) T$ b
/* Initialize MCASP1 */
8 L( Q4 y0 N! T, L# a mcasp = &MCASP_MODULE_1;: ]* s+ l9 s+ H5 l
mcasp->regs->GBLCTL = 0; // Reset4 g* J* ^, s. u0 E$ G
mcasp->regs->RGBLCTL = 0; // Reset RX" ?& Y' C. i$ k3 X2 ?! S& j7 P
mcasp->regs->XGBLCTL = 0; // Reset TX
7 g0 R3 _/ M! s8 v# `; n- w mcasp->regs->PWRDEMU = 1; // Free-running
' n0 U6 W8 K' n- u7 ]8 N% N // configure McASP0 receive registers1 n) j; U: j3 _1 k. D
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
, v1 n4 |& |) R; L0 n mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
& {& P0 b6 m1 W5 b0 K* V+ W mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
, t' i: q: P X M* @ mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
/ l5 S3 Z- k+ [9 O+ V p" Y mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
; b1 ?: X8 K* n) i1 O9 _ mcasp->regs->RTDM = 0x00000003; // Slots 0,1
& j% M% Y* m3 {9 h1 V mcasp->regs->RINTCTL = 0x00000000; // Not used
) `6 L; b# I) [9 w6 x mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2569 J7 H _% `- [$ r
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
6 Y% u. W! u+ b$ W# I mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus2 f2 {/ I/ k: N( x9 X& a7 Y
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
" [& p$ U# t k) W mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
3 U/ T' `& S9 ^2 \6 b* Y, D mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK, d. _; Q. M5 q" F# G6 p: W
mcasp->regs->XTDM = 0x00000003; // Slots 0,1* w* }' W# O6 b ?( `
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
# ~- p& k; u5 p& ] mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256( S, W/ b/ [- y' k5 d$ }6 r
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN3 z7 O( _$ u: ?2 e, Y- v
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
; X7 @! E* a3 L6 z7 ]. F mcasp->regs->PFUNC = 0; // All MCASPs4 u1 e% p. F) X# E+ _
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used
5 _9 }, s/ R6 r, z; p7 ]" W h mcasp->regs->DLBCTL = 0x00000000; // Not used
8 I$ V+ X5 V4 }4 P2 t6 [+ T, C mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
+ A6 l" H3 b3 G3 G8 u mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
. {$ `3 f) l' W; t& d8 G while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
2 `3 M; Z: P. ]# m& P mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
/ ^9 Y; u& |; W2 a$ V while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );. Q# D& M) i* O, ?* r5 A
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 2 r1 m8 S; z3 F, W$ R
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );. x' g. j% T" s
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
2 c( i7 i+ r+ A$ h2 z& \4 K while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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: f* [4 P% r( v0 z8 Y4 b7 K mcasp->regs->XSTAT = 0x0000ffff;
* I( y" E/ f: C. f mcasp->regs->RSTAT = 0x0000ffff;
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( Y# z) H' F9 s- o9 x/ z" ~+ g4 o3 k9 e n mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;, E8 |) m x E: L1 p2 `
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );* l6 b0 v3 c! t5 z+ R% q& J6 T
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; & `$ V4 \! V' r
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 */
& s4 k/ x/ \/ U/ Y" c' ? mcasp->regs->XBUF5 = 0;
3 a* E& n% H! l mcasp->regs->RBUF0 = 0;4 y9 E/ J- N+ D Z7 Z
5 I4 Y7 f6 e m( y: p' N mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
4 F u( x. I7 ?/ Q4 r9 O( F- C, Z while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );: L; H2 {; Z3 b9 j, S( l0 A5 r
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
( t* [& O' I* |# M/ ] while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );; J: x7 |3 z" q! ?
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 5 X" L2 U3 r+ N
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
/ q( |2 g4 Q. K! j3 g/ ^ mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
" i5 B; S. N% Y4 {; ?+ d2 F7 I" q while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );- e$ l$ |7 a9 E0 [; v2 \# G8 l
9 V% ^( E. L8 Z* ~: q, o CSR = 0x0000;/ c$ t9 x/ p0 N% A) U% E' [+ Y# u
INTC_INTMUX1 = 0x3d;2 m+ K, T% p0 [/ s- r8 Y, h: ^% L
ISTP = (unsigned int)vectors;' X" [# Y+ _9 R% J) R
ICR = 0xFFF0; & i2 A+ t [7 z) ~
IER |= 0x12; 8 m O1 |' {! z/ K0 [
CSR |= 0x01;
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还有就是两个输入输出函数:
( c2 c: J2 R# ~$ H ^void output_sample(Int32 out_data)% J1 i" z8 a3 q9 M9 X$ R; G
{
% k- Q& r$ H; U( g AIC31_data.uint = out_data; 4 t( b) k3 j- k* d B( J1 ^
MCASP1_XBUF5_32BIT = AIC31_data.uint;( a* A0 q$ {4 V X; u- ]
}; y9 v/ c7 z' P. {
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Int32 input_sample(void)
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. Q5 ] Y3 k- X+ P l( D: c9 Z1 ` AIC31_data.uint = MCASP1_RBUF0_32BIT;9 m. I' P8 n4 q# i1 U3 `
return (AIC31_data.uint);
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