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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:
. X( l2 M6 {& ?" `5 J: t/ f% Tmain文件:
+ z7 w/ T0 Z) I5 d/ ?& V" R3 c0 Binterrupt void interrupt4(void)
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! |0 t z' g0 w* o" |6 O Uint32 sample;. I& F! J. z. B! O- ^
7 U1 X& f- j3 s9 v4 W" A. [3 f sample = input_sample(); // read L + R samples from ADC
$ w& ? x9 o' J9 j9 _) w output_sample(sample); // write L + R samples to DAC : |+ T1 \! ?0 @$ T" o0 G
return;
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int main( void )/ R2 z4 f, [4 ^; d$ O
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4 T2 J- s2 |% J# a /* Initialize BSL */! h/ W; K+ r! c5 Y7 E
EVMC6747_init( );
' w9 @0 }( j" c7 a3 r /* Call evmc6747_intr function */
% G+ V( l" h& V# p- w8 b, h, \ aic3106_init( );
5 ~ a |. x2 M6 L: o z9 D9 H while(1);9 X0 j+ N% X: L5 }# U1 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
/ w5 p/ q J) {/* Initialize MCASP1 */7 I8 x, d+ G( E, U
mcasp = &MCASP_MODULE_1;
& \9 I1 L3 z9 T# U0 S( s* {& J mcasp->regs->GBLCTL = 0; // Reset9 z6 G7 W& ]& r* C; q0 ^- P8 [. H
mcasp->regs->RGBLCTL = 0; // Reset RX
2 T: N4 h9 m8 Q0 U$ @& ] mcasp->regs->XGBLCTL = 0; // Reset TX
) U! g& f& b* `9 a( H mcasp->regs->PWRDEMU = 1; // Free-running% l- T8 l4 l6 Q& i% x9 Q& b$ k
// configure McASP0 receive registers( m: H5 z% a0 k! P' l5 G
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used3 O& w/ r; `$ e- [3 x
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
* P0 u) g- e8 k t% o mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
, t7 _. N5 W" k1 V7 l2 j mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)1 G4 i( x$ j& U( z+ \/ [
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)3 V4 o4 `" U. J. n S
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
" B8 y* }; [9 z( U0 N mcasp->regs->RINTCTL = 0x00000000; // Not used
& C8 f# F6 K8 d: J3 E2 ^, F, i# r mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2561 y/ }/ i8 x" o( O% i& w
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
9 `/ Q* c9 S3 l6 B7 ]7 u8 ~2 t. ^ mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus2 E+ x/ I, P. n3 W+ _! d
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
: h" v: ^: G( H9 u9 |) { mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
3 t. t8 V2 z2 q% H mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK; M( E7 `# i+ C) L/ z
mcasp->regs->XTDM = 0x00000003; // Slots 0,1' ]6 R3 J, i; g5 G& P5 s
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit" i; m; m; r, _3 N4 C: H
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256/ z& x7 c6 f( W8 e; \7 [/ R
# ?+ T7 D Y8 z- T/ K% y0 C! ]! F mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN5 y" T; |' m& V0 z5 G% `: n1 o! V
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
- a' }7 u, \% S! F8 B; U mcasp->regs->PFUNC = 0; // All MCASPs
- X' r4 h* c& R v* y mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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) c$ w( M' |3 z: r* r2 j) j mcasp->regs->DITCTL = 0x00000000; // Not used
1 z$ \ C, X/ T mcasp->regs->DLBCTL = 0x00000000; // Not used
5 {" F. q6 B& O! l" v( F3 d mcasp->regs->AMUTE = 0x00000000; // Not used
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+ _* Y# B2 ]- ~' t z* F/* Starting sections of the McASP*/! y6 |1 a- k" Y& l
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
. W( g6 L: k) A. y while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
0 V& H) ? b$ k( i5 T- X L6 Y. B mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; , l7 B1 d3 T/ \# M
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
1 B" N7 p0 Y7 J2 l% k: ~4 l while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );, D0 o6 ~& b7 V5 z' D/ o0 Z
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; ' O& j" S% O; O6 G
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );) C! {' ?1 t+ ?' {$ @7 J
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mcasp->regs->XSTAT = 0x0000ffff;
+ d5 [( V) r) d2 L P mcasp->regs->RSTAT = 0x0000ffff; " h4 _# q7 m2 O6 _- | p& j* u
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
! J2 M3 p) u; y' s: P2 t' t' Z while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );0 D' A5 S; D+ }: N
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
6 m% H3 q0 F3 `! }, ^ while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );# R4 [# P$ Y- n2 W( E! Z
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/* Write a 0, so that no underrun occurs after releasing the state machine */
i' Y3 g5 e* j) f/ A mcasp->regs->XBUF5 = 0;
4 W. n" a5 v# v$ F$ q mcasp->regs->RBUF0 = 0;, ]' t9 ~: w+ c3 }, ?8 T1 I' @
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
3 K% s% u. W2 a while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
9 m3 T& p9 _; a( d mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; . Q9 W5 }: M3 k2 Y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );9 l; ?- q: ~4 D3 O, y7 m8 j2 @" `
$ q( I9 ^, o* X: a) m. c9 L2 C mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; ! P. a0 F( d# K9 G( h& @
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
0 M4 s/ k+ G1 E9 f h mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
/ D) l2 |* W$ t) k4 E$ K while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );: L7 F: N0 ?6 K: e, J
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CSR = 0x0000;
3 z% T4 ?3 L7 q# q$ @- G INTC_INTMUX1 = 0x3d;
0 w* _1 ?9 y0 R5 A& G9 U9 { ISTP = (unsigned int)vectors;
! I8 U3 j3 \8 D* a# {* X" O ICR = 0xFFF0; 9 {7 @ _( F. r) |' t6 r
IER |= 0x12;
4 L/ e- [6 w7 x; H# G) R. V# h CSR |= 0x01; 3 L* k( H2 d1 v6 C
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: }9 M: j* ?) }; J+ v5 |* U还有就是两个输入输出函数:
% T. U5 M7 }& L* q# X' X' A! rvoid output_sample(Int32 out_data)
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. h" g& B: [( S" p: s, W AIC31_data.uint = out_data;
1 U6 B3 ?+ e1 i" u% K MCASP1_XBUF5_32BIT = AIC31_data.uint;
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Int32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT; y7 `; t% A! L4 r- ?! C1 p
return (AIC31_data.uint);
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