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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:
* Z1 M8 W7 ?, N2 e: h5 `- Amain文件:
/ l7 L9 w+ d8 jinterrupt void interrupt4(void)
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC
- A" N+ p' _+ b output_sample(sample); // write L + R samples to DAC
. I- P+ z/ ?( g, C return;
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0 g1 |! M+ }8 L3 |int main( void )
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/* Initialize BSL */0 X; K8 e; Q/ Y6 }8 R
EVMC6747_init( );
, N" ?3 [) O0 ~* s /* Call evmc6747_intr function */
/ L. z0 Y9 d% w8 p% n4 @+ Y/ [ aic3106_init( );+ ~! F2 h0 t- g# f
while(1);' n/ t' i; D- P% c, M
}
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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9 h# H, W! B. z& s; d4 T
/* Initialize MCASP1 */1 J2 n5 k* g: y0 [& s9 Z
mcasp = &MCASP_MODULE_1;
9 F `6 F$ X0 d3 X- Q mcasp->regs->GBLCTL = 0; // Reset; O! _8 L! H& C. d
mcasp->regs->RGBLCTL = 0; // Reset RX1 h; C2 U# W" v5 y/ D8 A, K
mcasp->regs->XGBLCTL = 0; // Reset TX
8 V; Y* f4 W& P0 j mcasp->regs->PWRDEMU = 1; // Free-running" Z) g- o- `9 j- A
// configure McASP0 receive registers# N7 [3 w7 m, G
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
9 z5 s( k: P. H+ K# t- p mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
1 y, T( l+ q5 L mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word! \) {8 i5 `% p+ d4 d3 U0 E3 T
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
3 z& |$ L% n8 _4 Y9 A1 R1 G" S mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)1 x7 I* z4 N9 o! P
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
5 H$ U# C+ P! r: m mcasp->regs->RINTCTL = 0x00000000; // Not used
* t0 r6 o @+ H mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
- `: r* N0 r% B mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
1 i) D2 Z0 m1 l: e* N4 k& E mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
/ _3 Q- T a! r4 l0 _ mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-162 p5 b2 Z; _$ U) f( _
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK( a: K; v: R, @3 {* S; R7 o
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
0 n8 {% P# v1 \4 c mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit' C+ t. E5 ?6 x
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256& m! Y2 N( j. {- Y+ n; e0 h
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
& K8 i! Q9 G$ l5 A! w- J8 n mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT& b& Y% T& ^, |
mcasp->regs->PFUNC = 0; // All MCASPs9 E, S( o6 I& ^' ^: h6 F
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1- H' Z0 e( {: O6 v! ~1 _
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mcasp->regs->DITCTL = 0x00000000; // Not used! U3 S0 j4 {% ~/ a
mcasp->regs->DLBCTL = 0x00000000; // Not used
\* m9 j9 r* P5 C1 }. \ mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/8 S% }& V! P$ |+ Y
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
. W! n0 `3 b9 i5 x while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); ! U) |$ M4 M7 U! V3 \
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
3 W/ H1 S# W2 f, N while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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* j1 W# |$ [/ \ mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
- D" w* U9 g" f0 I; i& ~! @3 H while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
! {& M! F4 e! V; R C; | b* @ mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; m0 c( a: k8 @0 ` C- f- [7 @9 d
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );5 B- Y F0 a3 Y* I) m
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mcasp->regs->XSTAT = 0x0000ffff;
T! w& ?7 ^ Y3 L5 X mcasp->regs->RSTAT = 0x0000ffff;
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;* A1 o0 `) s3 T" x0 j# D5 V
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
3 I1 `) Q: ?( c, M mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; / S' q$ G* |+ d" q& y# 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 */# y9 K) H! z8 w' r+ s: B
mcasp->regs->XBUF5 = 0;
0 C7 w$ B M9 b2 s7 @; N, T mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
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mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
1 t" H- a, @3 a, n' G while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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+ L+ W, Q$ a9 t* u mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 1 N U7 c1 |2 N0 P0 m8 p: T# V4 u
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );5 x7 M5 P5 ]) X
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
$ d N3 D( H8 h while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;0 R8 c I) E4 _3 a
INTC_INTMUX1 = 0x3d;
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ICR = 0xFFF0;
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CSR |= 0x01; 5 F8 e; B7 \8 ^' a: W2 t
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还有就是两个输入输出函数:
8 }# f+ j" {* T* P' l8 Lvoid output_sample(Int32 out_data)
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) }5 J9 p8 x: n; o+ c AIC31_data.uint = out_data;
9 ^( K, W8 Z1 S4 N MCASP1_XBUF5_32BIT = AIC31_data.uint;6 m& {: D5 T! @7 y9 k( e' ?5 g4 f
}
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Int32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;+ t9 h* C& h& i: W
return (AIC31_data.uint);
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