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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:
0 R9 V! h! ` _& b+ _$ xmain文件:% G8 t$ q) h! }0 y8 c& ~3 \5 S2 V
interrupt void interrupt4(void)
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) q) \! ]+ A0 z Uint32 sample;$ t2 I, ^/ y) `
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sample = input_sample(); // read L + R samples from ADC }3 \7 i& Z; J3 t* `# v8 e
output_sample(sample); // write L + R samples to DAC
5 T% E6 w5 c X+ I+ ]) e return;9 T$ f" K, [2 U6 W& ?
}
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int main( void )
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2 r7 d% X2 u+ |/ ~7 l /* Initialize BSL */3 H& i' e3 _) b. ]" W: V* T, {
EVMC6747_init( );5 `/ ^" w9 g Q$ k) [
/* Call evmc6747_intr function */5 E5 B- G: F8 V+ O$ S* v
aic3106_init( );) J- I: T' V- @: T
while(1);6 K. X+ c5 j$ k% C
}
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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, i( k9 [* G/ }/ D) H
/* Initialize MCASP1 */
# u% [; K* N: P8 y: s G mcasp = &MCASP_MODULE_1;
, t5 Q1 A: [ I mcasp->regs->GBLCTL = 0; // Reset+ u, G8 I& j1 r3 ?) o8 _1 S; T
mcasp->regs->RGBLCTL = 0; // Reset RX! R+ C. O# e D F
mcasp->regs->XGBLCTL = 0; // Reset TX, H; Y1 P: }6 ?
mcasp->regs->PWRDEMU = 1; // Free-running
/ M' }% c) g2 @1 W! v) x4 w* e2 Z // configure McASP0 receive registers
( g2 f6 o3 Z1 q9 p mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used4 y) R1 c! ^) I. \4 O1 Z5 ^. {/ C
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus8 b* W+ B1 j* U
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
8 g2 |1 }) O( q2 x! O" X7 l mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)/ e5 t4 z* ~$ K7 i" z1 o& v/ U
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
5 n- Z3 g, {% D( i: R9 S" K mcasp->regs->RTDM = 0x00000003; // Slots 0,1
$ Z$ d% ]. y% {* Y/ K mcasp->regs->RINTCTL = 0x00000000; // Not used
4 R1 p4 O5 G3 v6 A' W3 \4 `$ Y mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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7 Z8 S- G2 i: T& p mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used8 i( h8 p2 i- q. v0 u
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus+ U3 M4 i2 A5 a1 E0 J
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
3 v8 I. ^9 | J0 {9 a mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-161 |6 v- S/ ]- [) W/ |. h
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
8 K9 ~) b2 \, C* W: V# y, U3 @ mcasp->regs->XTDM = 0x00000003; // Slots 0,1
1 ~/ D; K4 x! U Y) ^ mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
+ m; m/ Y8 C. H( C- x$ Z s7 P9 H mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
8 P! h' S) R6 N" [) J5 o% e3 j: d* i mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
: g! L3 ?6 i) L# \* d' I mcasp->regs->PFUNC = 0; // All MCASPs# g y4 N/ B( _' ]/ P5 _
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX15 k( g) R1 [0 D7 B+ N( @
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mcasp->regs->DITCTL = 0x00000000; // Not used
7 O. o3 f! o: S mcasp->regs->DLBCTL = 0x00000000; // Not used
d$ n# O. q. T9 v3 b$ ^ mcasp->regs->AMUTE = 0x00000000; // Not used8 _5 ^5 P" b; w4 d+ `9 ?5 ]- W+ Z0 i4 ?
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/* Starting sections of the McASP*/$ `+ J) D& ?0 `) K
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
2 Q: @ B. u3 l while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); % Q- ?- Z' q) g: r7 y8 ]& z x5 P& `
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
' z2 h) R$ A' g8 z! P( [0 V while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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! I8 x6 m* q# {& F! O% S4 h' v9 o mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
0 ?" T" p0 P6 W I! a( p while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );2 ?6 q' t2 I4 S' D
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
, T9 b9 g" ?. a1 k while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );& Q" S. m( O! M7 a: _
) H* Q2 \& k. I mcasp->regs->XSTAT = 0x0000ffff;
& Z& w! R5 \. }* B mcasp->regs->RSTAT = 0x0000ffff; & C/ c) b2 h# Q
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
% X8 a# V& ~( q while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
) A& a6 O: N7 R mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; % J1 B! M" I, ^
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );) S0 L3 G) {# P' V+ s- y
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/* Write a 0, so that no underrun occurs after releasing the state machine */5 q& d0 `# `* c
mcasp->regs->XBUF5 = 0;
+ a- c( ]6 `, E; ]* A% p& p$ k mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 9 W& c" h; ?% ~: O. A0 c9 j( j! i0 [
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );, i" M1 F4 R! c
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; % M# F/ S# n4 a( {/ e- x6 j0 c
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );4 Y) ]' {2 } O# Y" }2 B
& |2 o: ^$ C' }+ q- z mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
# |- @' k" y( H while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );+ |8 z% _3 e/ d G
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
' H) h: m5 v' D, I. n. F' C) }3 L while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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( z. n0 E& f: {; S ~6 @: |6 v CSR = 0x0000;' _. A5 b6 o0 M9 z! U
INTC_INTMUX1 = 0x3d;; I5 I, @& ]2 V& r. x
ISTP = (unsigned int)vectors;3 X( H+ }3 W+ [- d: ~
ICR = 0xFFF0;
/ G! R) o4 U0 P- |0 u IER |= 0x12; . G1 o* F# w' t- |
CSR |= 0x01;
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9 ~: C5 _& B6 T: y* E% M还有就是两个输入输出函数:
' T$ z/ E7 ~" O9 qvoid output_sample(Int32 out_data)% y+ S }& E3 V+ ~
{
9 U. n% f G. c( E# m3 m AIC31_data.uint = out_data;
3 {/ q& D% w- s% ~( I' ?( _* s: k MCASP1_XBUF5_32BIT = AIC31_data.uint;
) Y6 Q* z1 z; o0 Z6 A# k}
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* c3 e1 _, N; x7 bInt32 input_sample(void). w; @; D& e2 ^5 I+ A& t5 t
{
+ a1 ~9 B1 R2 ^, E9 y" @" @ AIC31_data.uint = MCASP1_RBUF0_32BIT;7 q x |0 G( I r/ Y
return (AIC31_data.uint);- J) |' X2 T: M% }/ }# H
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