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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:2 L, s: i0 u6 b* {, \
main文件:
& Y: ~$ V9 F5 D& {0 e, W( \interrupt void interrupt4(void)
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC4 K9 ?+ e9 i A1 b
output_sample(sample); // write L + R samples to DAC
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) F: x* P, v' g' \; o0 {& ]. b: p# zint main( void )
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# ] p1 p4 |) o; s' U4 j /* Initialize BSL */2 C* h) ]% C. K& K
EVMC6747_init( );
1 D4 }3 P8 x: O) p9 v0 o0 C' U /* Call evmc6747_intr function */; x a8 V1 N: E% J6 E
aic3106_init( );
9 v0 M4 T0 N) d, X while(1);
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: A$ L$ N$ X# ~( K, R# Iaic3106_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
& [) T$ k N1 Q$ \* _# }+ G/* Initialize MCASP1 */
9 _% _$ A6 a/ R9 i mcasp = &MCASP_MODULE_1;
. t$ u9 E3 I' p' l2 S* P mcasp->regs->GBLCTL = 0; // Reset2 k) Q. e0 B6 _4 Q9 m0 i: \7 T
mcasp->regs->RGBLCTL = 0; // Reset RX, o. i" J! W1 K' M/ c+ A
mcasp->regs->XGBLCTL = 0; // Reset TX( w$ ?( ?) i0 c. \
mcasp->regs->PWRDEMU = 1; // Free-running
2 |8 e6 Z! P) d. U% w2 d7 } // configure McASP0 receive registers
5 O( m: T B; I& J4 s7 c mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used" \3 ]' F7 M! ?& x0 m8 d6 b4 D
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus; U" l! k9 f4 c
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
8 ?) p; }6 k F& ]4 i% ~( z mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
3 h+ Q8 e" i6 Q% v- O mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
: S$ W; C' t4 ~+ l! b1 X9 {$ r mcasp->regs->RTDM = 0x00000003; // Slots 0,1
5 ~: E: o! v2 Y# a2 f) K mcasp->regs->RINTCTL = 0x00000000; // Not used
. T g/ [2 }/ M mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256, y: c ]/ c' l5 D6 V: e/ h% P
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
3 N" f* |" @, E3 D- q& Y$ w: o0 w( ` mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus4 Q2 e2 D# o: M4 c& ~
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
% @- s. T8 |( T3 h8 ]/ M( X% y mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
. Z+ z! K- n+ t- m) K mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK6 L/ z+ K0 m; r# P# z
mcasp->regs->XTDM = 0x00000003; // Slots 0,17 ` T8 z; n% ?& |
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
' J4 c! ^9 \: l) P* U mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2565 g8 K2 q8 A/ R; L0 J2 z/ s ?) _4 G
, u5 K- o7 u8 i4 F mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
; w6 L& K6 ~) Q& c! u mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
) r8 u5 d0 q& `) q mcasp->regs->PFUNC = 0; // All MCASPs
; D% n( M, G1 W! g9 V, z mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1/ J$ x3 F a7 B5 w5 K
: p* b8 d8 X/ ?1 X+ r+ j" r' O& G mcasp->regs->DITCTL = 0x00000000; // Not used
8 T7 R* V- L2 H mcasp->regs->DLBCTL = 0x00000000; // Not used
3 {, a1 w% Z/ Z/ V' s0 k @" f mcasp->regs->AMUTE = 0x00000000; // Not used! P7 h1 |8 `% b; \* Z# [
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/* Starting sections of the McASP*/
3 T8 j M- o' h& T3 E# i mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; ! ^4 e, f( F/ A* C& J
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
+ _# e+ [* i! r mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
% g1 B9 U, u! e7 E. w while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
( B5 B5 }' z& f1 O2 C& M5 M7 m u while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );9 ]! K2 R5 ^1 y7 w7 b s- r* h% S
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 5 N% _; d9 {2 e+ s5 O+ Y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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- E/ C; C: ~3 V+ ] mcasp->regs->XSTAT = 0x0000ffff;
8 a4 B! `; Q y; g: C3 h9 Q& ? mcasp->regs->RSTAT = 0x0000ffff;
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( d, X0 P: Z+ w$ j' T7 q mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;0 J, C! k- N: V4 S5 g% V( o! l6 } W
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
- \1 k$ k( t! @6 O6 N" H mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
0 B- Z& f& r+ Q0 T' y while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );8 F# r9 r9 ~* w& P
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/* Write a 0, so that no underrun occurs after releasing the state machine */
2 D: _/ f6 a5 a. K( c mcasp->regs->XBUF5 = 0;3 B( V6 p( f. n0 _! |% K3 b) O7 M
mcasp->regs->RBUF0 = 0;/ ]3 |4 G2 v2 t5 w7 w
5 p( T+ P$ O: ~$ ]$ y mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
' H, ^! v* g2 `' n while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );. a1 l! j) {* N7 [8 F
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; / `; v0 T1 U& F) n% p6 P2 G( Y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; ; n2 D; t% m6 M# s/ P B! i5 D4 r# @
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
4 |: d6 w5 G) j$ Y9 B mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; 6 U0 r* O' l+ R& _; |6 w; z/ b
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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d' [$ X* d) k3 s. z CSR = 0x0000;. {" _" e/ n1 m6 y+ t
INTC_INTMUX1 = 0x3d;
. m8 s, ?7 [/ M0 Z1 W% H# A. q ISTP = (unsigned int)vectors;! A' n) e2 }1 j& W2 w( c
ICR = 0xFFF0; 9 y% a! I7 f" C* C% X
IER |= 0x12; 2 D' q3 s2 e( ^8 Q' {
CSR |= 0x01; ! y$ f# z) y4 D4 ?
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还有就是两个输入输出函数:# R! n, P6 f* z( ?& P
void output_sample(Int32 out_data)
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0 s# V& V* `$ @. g$ ^* i AIC31_data.uint = out_data;
% k; R+ G' h) T$ i MCASP1_XBUF5_32BIT = AIC31_data.uint;# g4 v) s: u, o# l# b: v! y) h' L
} b! t& Q' n. q( j9 k
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Int32 input_sample(void)" y3 ?$ B, k1 o- b% z, o Q
{
8 m! C: k) l5 ~/ U- n, C AIC31_data.uint = MCASP1_RBUF0_32BIT;
2 Q( r( }' O4 i# }) U" n return (AIC31_data.uint);' p, B) _0 e% \3 x4 X: E& x
}
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