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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:; L. d3 @ M( ?: o5 I
main文件:( d" j) ]# L3 ~0 B1 C. G8 N' w$ G
interrupt void interrupt4(void)
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& u2 T2 t2 z% D Uint32 sample;" m' I4 G3 ]; C0 ~8 A e% P
; Q9 S. K- n$ A1 \: g sample = input_sample(); // read L + R samples from ADC
2 d8 `& d. I$ }9 L! { output_sample(sample); // write L + R samples to DAC
. [3 }9 x! i6 R1 w$ [7 z+ p9 ?& m return;
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int main( void ); Y |7 O# n! c8 n* X7 V4 }% I" g4 {
{
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8 T* d) V0 g4 c /* Initialize BSL */% L `! k8 l3 r% W! F5 o5 [
EVMC6747_init( );
0 u6 G [% m7 `0 ]1 P+ g; R1 | /* Call evmc6747_intr function */
' v H" @! S" [" A" A aic3106_init( );
+ f, }8 Y# r( _) } while(1);! N2 c3 T9 ? Z
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: a7 B8 T; w6 V3 V3 jaic3106_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
, x: f( d* v* c/* Initialize MCASP1 */
* |; p5 a9 G8 ?$ j5 i$ D$ Y mcasp = &MCASP_MODULE_1;. j! i$ {4 \' W7 h \4 [
mcasp->regs->GBLCTL = 0; // Reset9 D; P4 }% b P& }( h! M" a0 Q/ z; {
mcasp->regs->RGBLCTL = 0; // Reset RX
; N% k$ j; l/ E- ]% d) b7 A P mcasp->regs->XGBLCTL = 0; // Reset TX
- g2 l, E$ E9 W8 z+ i& _ mcasp->regs->PWRDEMU = 1; // Free-running
* e' n. u9 y. ] // configure McASP0 receive registers, I( a. M* F b9 n, n7 t( f5 \3 R/ y
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
5 \1 F' g4 \! r ?6 Z( n: r mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus1 N; d( u% A E
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word1 J3 v, N! n6 C8 J0 ~# o& R' M4 k
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
. u6 X F# d4 W" O! l; v mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)4 ^; D: P0 c9 r* s" o
mcasp->regs->RTDM = 0x00000003; // Slots 0,13 q* D/ S+ f: \, i
mcasp->regs->RINTCTL = 0x00000000; // Not used
& S4 y W; [8 }1 ? mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256* I7 m/ a5 X" q0 C& m( i
) U3 |6 p0 h' `8 W/ M* Z# u mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used' k$ o0 {6 Q/ s6 |
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus, k" o" c& H! _
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word% H! D8 K# j9 u$ W1 G( r
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
3 [$ v% M$ {* M3 ^ mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
8 F. D; y: N) e9 p+ s# W mcasp->regs->XTDM = 0x00000003; // Slots 0,12 k2 J2 s# Z3 _
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
$ s8 X- h: W1 ~1 N8 k" f! | mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2567 t V! |9 ?% m/ U
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN( W- T( ^" R( U' k! n/ a& H
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
& G' \6 S W, v$ ~6 x0 F+ l mcasp->regs->PFUNC = 0; // All MCASPs: H' s- a: Q3 j' Q6 v
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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& T" \. U. C3 S2 Z mcasp->regs->DITCTL = 0x00000000; // Not used/ K: P3 h" {9 P4 t* ^+ ?' }
mcasp->regs->DLBCTL = 0x00000000; // Not used
0 H' y8 B& a9 g( T7 n: I5 _ mcasp->regs->AMUTE = 0x00000000; // Not used6 G% a- {+ ^( |, ^: M9 X- r
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/* Starting sections of the McASP*/- l6 @2 m7 _6 G
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
* j7 J& ]3 J8 @ while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); . Q0 C+ ^" M% x1 a2 i J9 s
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
7 Y$ d$ b; H& d9 f4 y9 h* l/ p4 D- ` while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; ! f Y7 B! g. s7 m
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );2 a. g9 ]; o7 N
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
1 I+ S' q9 D8 ? while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );. g6 ?% n( L5 b( E# z1 ~' L
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mcasp->regs->XSTAT = 0x0000ffff;
9 l# l1 L. q5 p0 O" q, p- u mcasp->regs->RSTAT = 0x0000ffff; " p" F: P4 L! S
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
6 g6 Z& }' ]# ] ^" m2 {4 ^" C while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );$ l' s. _0 O8 T5 b) a; S0 ^
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; ) E* k, e" a9 F" W% m" V }
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );& `- d& T( x' D5 s4 I. |& l
& p& U p% }: e5 g# M* P7 P /* Write a 0, so that no underrun occurs after releasing the state machine */2 X2 F$ k9 h8 F0 V# D( G
mcasp->regs->XBUF5 = 0;
* Y0 S% V# ]" y4 T8 @% h+ [ mcasp->regs->RBUF0 = 0;2 Z; x" s) ?( R8 T! u) _' ^
: `$ I0 m* m4 ]4 Z# _ mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
1 h; y! P. }6 B3 E. J$ |/ v while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
' B* R9 j" q" N! b! w9 M mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; ' I7 b$ u% x- K1 z' Y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );1 S: \! D. T# y1 X' P
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; + {5 j" ]1 \$ R) s9 Z
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
$ |/ o6 e Z: f. _ mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
6 E8 o0 i& R7 x4 y& q. }4 P) h while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
! u8 F' s/ ]7 o" u# e* R INTC_INTMUX1 = 0x3d;
( o2 `7 U8 p1 H1 v9 o7 G' w ISTP = (unsigned int)vectors;
4 Z! `2 e8 c# B ICR = 0xFFF0; - G. f# ]1 U9 b# X
IER |= 0x12; $ z3 p! q3 H# Y$ K
CSR |= 0x01; ) c8 C8 N$ z0 s7 _! F
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还有就是两个输入输出函数:
( M8 {. G; z$ C; ]% Z" l! ~void output_sample(Int32 out_data)
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; f! u) E8 v( L. U! _ AIC31_data.uint = out_data;
, X' I4 a& u& M* o MCASP1_XBUF5_32BIT = AIC31_data.uint;- j8 p& X3 ~" u0 L( w, L
}; e0 g5 D) h3 T- Z9 M7 ~
6 ^/ n1 h: _* F2 PInt32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
4 i6 U7 y$ E. d, p* d3 B* \, } return (AIC31_data.uint);/ r4 |* h! ^# k
}
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