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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:
1 T2 I) h* L9 k8 U- Zmain文件:
, \9 E7 [: h1 _' t' D* ginterrupt void interrupt4(void)
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# c* ^0 N. d- y" t/ k( ] Uint32 sample;$ @$ |- G" w- x3 T O7 H
% ~$ a9 R4 [) E- D sample = input_sample(); // read L + R samples from ADC6 f, [7 B" W5 e' {5 v
output_sample(sample); // write L + R samples to DAC
7 T" x; Q3 e- X* @' X' f- R7 H return;6 @4 E: T" m5 o7 s1 a v9 {
}
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( `) |# t8 |# m* H. A; Nint main( void )8 M8 L. i5 P7 Y" Z8 e
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3 p1 }. O5 H8 ^) c& L$ U+ G /* Initialize BSL */
6 X( g7 [, [6 j0 s& D EVMC6747_init( );" W$ a" J" m( Y9 l5 D
/* Call evmc6747_intr function */
! n9 Z' ^8 C; u( e0 R3 P) K, o aic3106_init( ); V' K( J/ t( G7 \: J: Z' R
while(1);+ g* w! l1 {) E L
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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( T1 F; Y+ r! J' x# N
/* Initialize MCASP1 */ z1 k* `1 l# U5 p% N5 E: ^8 N4 R
mcasp = &MCASP_MODULE_1; @" j: }: `, l* k
mcasp->regs->GBLCTL = 0; // Reset p% x; A7 g$ i
mcasp->regs->RGBLCTL = 0; // Reset RX+ J* ]% g% J/ R2 `# U4 z$ f1 l
mcasp->regs->XGBLCTL = 0; // Reset TX
' j: T5 |! v2 C4 R1 ~ mcasp->regs->PWRDEMU = 1; // Free-running
7 p7 H, ?" T# T; E/ w1 V4 \* V // configure McASP0 receive registers6 [2 p4 q$ c3 w" F
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
5 V# U! I5 K2 e+ B* | mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus4 E, {+ m0 z& `: F+ k9 _' b g
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word" S# {2 E$ \0 `0 h
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)$ R, A4 a' ]2 ]1 `# O" k! c
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)" D/ _3 S" }0 B
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
^! O" z1 x2 `& D* G& L2 N. ?* v+ S( | mcasp->regs->RINTCTL = 0x00000000; // Not used& K2 z! Z. a% }8 ]& j4 S1 S, F
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2560 B3 d/ `6 c0 }3 l6 C( e, j( E& ?/ U% I
* r1 m/ x( H, P mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used# u3 h3 [ y4 Z r3 D
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
6 Y0 h s c1 b$ n mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word5 q! |1 @/ I( N9 d! ?0 q+ m3 C- Q
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
9 a+ b; P7 M# I mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
$ d. _8 v& {2 u% R# |& q mcasp->regs->XTDM = 0x00000003; // Slots 0,1
\& q2 T2 h# m6 x mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
+ }, m* i7 `2 E7 O/ } mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN/ C/ m4 @5 p7 J+ K$ |2 k
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT5 Z/ ~+ T& B$ c' p
mcasp->regs->PFUNC = 0; // All MCASPs0 _& t Z) u+ B' `, Q/ q7 r
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1! R1 R' a% L5 F4 z. F9 D
# O3 K( i% j7 E0 T' A) X0 {. h mcasp->regs->DITCTL = 0x00000000; // Not used' Z; o1 n- C7 _ ?, `/ G) c
mcasp->regs->DLBCTL = 0x00000000; // Not used
# ` \ A* {7 r" c- u. z1 T P mcasp->regs->AMUTE = 0x00000000; // Not used, H+ @8 t4 W6 O* l" q
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/* Starting sections of the McASP*/
0 _% c& H+ ]* e0 Y+ Q( i mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; - e; J/ B1 L( P4 ~. J5 l
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 8 a d0 E, N% S, M& X7 K
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
' X5 F7 a* v6 n1 _! ^. C0 n! |2 K while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );% }& j# w( Y7 ?/ ~4 p4 m
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; , I4 Z; N9 w: w+ P% M9 `+ y
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
5 B2 Q5 I8 o; I. w3 E! t mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 8 Y: ^( E# O9 T' d
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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T0 R4 u- v: f! v# E7 C* c. _9 ` mcasp->regs->XSTAT = 0x0000ffff;
0 J/ U9 @7 T" q( ~% [0 L mcasp->regs->RSTAT = 0x0000ffff; ( g( ~! X% I( ?) Q# ]3 E+ c) n
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;; [1 y/ r% |& o' J/ H1 ]3 Q8 c
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
_0 I& ]: \5 d [. X5 [( e! F/ f mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 8 U, m) i7 A! [3 n9 J
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );, ~+ I) W' T8 H: e- I: N J
. O% L* c2 Y) Z, z /* Write a 0, so that no underrun occurs after releasing the state machine */
v& t( r' Z7 B) @ mcasp->regs->XBUF5 = 0;
/ v/ {9 L; U' i; ~) {/ \ mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
& w; w$ U# Y/ Q" y/ h: F1 ? while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
. ?0 s! @+ W$ L6 W mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
& P$ | T7 [1 h, x3 q while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );* e- ]5 H9 a5 `9 m
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
0 A0 t2 ^# U9 g4 v) g while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );2 g8 ?* t- o# n
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
# F. g3 c3 h, G' p while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;: B( i4 U. e2 f; O# ?+ P% [8 c
INTC_INTMUX1 = 0x3d;
\ Z; Y: d X; k8 H" G& u" m ISTP = (unsigned int)vectors;
( p0 c' v5 Y& H1 {4 i! Z% }) v+ K6 K ICR = 0xFFF0; ! x) Y7 W' E8 d" o4 b; |0 v% @. I
IER |= 0x12;
. E2 U, m2 g( G" J7 k CSR |= 0x01; ! X! x4 T. e- j2 T# T* G
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还有就是两个输入输出函数:
- y3 |2 ~7 [/ I8 q$ r" Dvoid output_sample(Int32 out_data): y; {: a! Z6 o8 v4 S; r
{
! e+ |9 U; |: r7 e7 L) k1 k8 p AIC31_data.uint = out_data; / n* j7 K% Y8 L! q
MCASP1_XBUF5_32BIT = AIC31_data.uint;
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Int32 input_sample(void)4 ?/ F. v* m: b f7 [% r
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
( n& @" c4 n* F, u( t' R1 | return (AIC31_data.uint);
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