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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:' n4 w* }) _( D5 M$ \
main文件:
2 l, A# `, Z+ f$ S" ~interrupt void interrupt4(void)
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Uint32 sample;/ j, k1 }; k) B3 K) b
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sample = input_sample(); // read L + R samples from ADC/ g9 v' p4 m% l
output_sample(sample); // write L + R samples to DAC
( A0 Z( V9 d5 \" }; D8 f return;7 _+ [% d) h( Z4 Z8 l
}
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4 t# F/ m3 t- _+ V* b9 u/ tint main( void )
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6 ^+ ?/ Y9 Y0 {+ s0 W- G$ C /* Initialize BSL */0 E# }1 b$ S s- R
EVMC6747_init( );% m8 C' e& d0 L; D' b- B! F% m
/* Call evmc6747_intr function */( j1 x$ J* @& e. b V
aic3106_init( );
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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, X5 l8 L9 n2 D+ A- v! O( p4 ^& c
/* Initialize MCASP1 */) E0 [9 {, d* h. {0 Y
mcasp = &MCASP_MODULE_1;
8 t- _. a: o# H5 L mcasp->regs->GBLCTL = 0; // Reset
! o( E$ H+ o/ J! K% k% t h& ] mcasp->regs->RGBLCTL = 0; // Reset RX
8 H9 t6 |/ @6 S* H# m# T mcasp->regs->XGBLCTL = 0; // Reset TX
6 X8 g8 |% y; Y# t5 Q: _ mcasp->regs->PWRDEMU = 1; // Free-running
j6 i7 q P! {8 k. Z( S // configure McASP0 receive registers
& S4 e' L5 z6 m mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used. s9 o. q/ ` S! N7 ?
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus3 p4 V. G. U; X0 I3 K" N) ^
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
" c1 k* m3 c) t8 T" u% c! u$ D mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side). ~, s7 {) c0 \/ _9 i
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)5 I& B! P# J2 E0 g& w7 L9 P7 g+ l
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
( u$ M* Z0 Q# c mcasp->regs->RINTCTL = 0x00000000; // Not used
& Y% E7 l$ X" \; z5 e mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
7 J3 G! R) F& Y/ ^# ]& B7 s' [ mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
9 S1 @9 K/ E& h L! U4 ~ mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word' s2 l) s7 `% q) p$ ]3 U1 H
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16, ]" Y# R) R: _
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
1 Y( n! g+ T* R) {1 g mcasp->regs->XTDM = 0x00000003; // Slots 0,1& b3 z# | N$ M; j
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit+ V) w6 q3 Y+ y2 f
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
% E$ C/ {) R; m- Z' Q( E- F" e+ P1 G mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
" N8 o. b$ w7 q* `8 U8 X; F mcasp->regs->PFUNC = 0; // All MCASPs0 p H. W* v& m3 Z) ]
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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4 O! [* L& Z7 m b9 g: |$ v mcasp->regs->DITCTL = 0x00000000; // Not used
% ]3 T5 X' J/ W& a+ t, {$ f mcasp->regs->DLBCTL = 0x00000000; // Not used, _8 i' p% W4 u* H+ J+ U
mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
/ n8 E ?& T$ z% Q# J) W2 D0 Y- n mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 2 j3 |# a" a6 h% S9 q: h
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 9 m) J# _ E/ n4 Z7 o
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; : m- {+ P5 I7 a/ U2 i
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );; g: |. q2 x- U$ x; Q- E. `/ H
2 J M2 }/ e# Z o' e% s mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
( D, b4 K/ I% L9 L2 x while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
- o0 _7 p4 G5 [5 S mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 3 T5 x0 _! t% x) T
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );* O/ I! G0 b. a8 O8 v, ~- T
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mcasp->regs->XSTAT = 0x0000ffff; 4 J* b- E. r; i8 Y9 @3 G; J
mcasp->regs->RSTAT = 0x0000ffff; / k Q/ ^9 N0 p
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
8 U2 P1 m" D1 d, C while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );% d4 K$ Q* E) l L
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
2 Z* o' I! e, Q2 T2 S0 g' B5 A" Q 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 */0 y* }4 ~. T1 F& C
mcasp->regs->XBUF5 = 0;" e) \* c: p/ U2 W# X
mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 9 e2 ^* L/ j7 {3 h" ?
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );' c1 O, | ?; x
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
4 }' j; ~0 W( t) U1 q) ?& r7 n while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );, G' ~; O! m0 H! ^* \( T
1 ?0 e, I- U( |, P) w- [0 @" m) `6 d mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 3 M! I6 g% z5 L1 g4 m4 ~
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
" I8 s# \: l+ q/ r% ^ mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; : Y/ [4 Y2 Q0 {. L: p0 b6 Z5 d
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );* Y% e( }3 Q- w& `
9 C1 ]/ S {) X8 R( c CSR = 0x0000;+ |! _9 P0 T) X% r: h3 V. H8 E
INTC_INTMUX1 = 0x3d;
8 f6 t" b& U G7 K4 ? ISTP = (unsigned int)vectors;! K3 r$ X- R" `/ e
ICR = 0xFFF0; " L" t8 ~8 A( @$ j% j
IER |= 0x12; , k4 ]7 [( B7 K" s/ ~
CSR |= 0x01;
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还有就是两个输入输出函数:
( Q. ]" b7 K& j* z. C) X3 L. a8 \void output_sample(Int32 out_data); o6 L& [6 c% c$ O( K9 d, E/ C
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AIC31_data.uint = out_data;
4 ~ F- \8 a7 g+ r$ x+ E MCASP1_XBUF5_32BIT = AIC31_data.uint;
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$ E8 C+ }$ D4 P# R' u; iInt32 input_sample(void)
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9 m" @/ U/ G( W: E l& i0 c AIC31_data.uint = MCASP1_RBUF0_32BIT;
; a/ X6 N: L1 \* { return (AIC31_data.uint);
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