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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:
- s: B0 N* j9 [" `0 O- o. D& pmain文件:
* o0 K: C7 J) K- b$ a' O& r8 Tinterrupt void interrupt4(void) , |3 F- F' [5 T
{
$ [+ z) D; k" v) f! v) B" s Uint32 sample;
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+ _! m0 k h, }0 y sample = input_sample(); // read L + R samples from ADC
; n5 a0 x& y M& p output_sample(sample); // write L + R samples to DAC
7 ^ p+ L% P5 R2 V return;7 G3 z) \# L/ T# Z7 V
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; V7 i9 `$ t8 U/ t. D% A$ q# tint main( void ); D. _5 M& V& Q! P( m
{
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. q% y9 C5 H! S /* Initialize BSL */" C! n3 ^# H8 _2 w
EVMC6747_init( );
* C7 ]8 o" h% r* Z. N /* Call evmc6747_intr function */
8 r2 b8 J9 z# T0 E0 p/ w$ |8 ` aic3106_init( );/ |- |. i; n* Q+ M: c1 M
while(1);: x) Q- a( ^6 u+ w9 }. c/ q7 o0 D4 w
}
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! I) w4 J4 m1 y+ H! Uaic3106_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
+ H+ E: T2 }4 y! d6 Q/* Initialize MCASP1 */
9 P, G! o. {$ l2 G mcasp = &MCASP_MODULE_1;
* B: k* i% X" H0 Q# B0 s) U9 ` mcasp->regs->GBLCTL = 0; // Reset- q" P0 Z) R" s
mcasp->regs->RGBLCTL = 0; // Reset RX
: P6 C2 i& T7 [+ E- k" s0 q mcasp->regs->XGBLCTL = 0; // Reset TX6 t# f: a! P9 e0 \$ v1 b( F3 s
mcasp->regs->PWRDEMU = 1; // Free-running
6 ]' P4 a8 a9 Y6 R% i' p; T9 p // configure McASP0 receive registers, t C+ h1 P+ P5 X
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used. ?6 E, n0 w. G% g K/ a. y n
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus0 L& X3 ?5 }- [4 K
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word. y1 y4 f. }! w! q5 o/ k S
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
4 \9 M/ r1 }3 _, Z, j* Y mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side), W( N2 K) F2 t& I4 y8 K
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
' w2 E% Y, O5 n \ N! z mcasp->regs->RINTCTL = 0x00000000; // Not used8 i" z- W, I8 Q* ]
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256# K8 `0 [: }9 ? q% A7 n
) Q2 B4 w, j$ n) L mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
6 T; ] S6 m7 R$ o, x% E: E mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus1 ^) r9 N6 B/ j. @# k) @8 ~
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
4 D! K8 t. a8 L) d1 A mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-168 A. R) i& {' \1 H& d3 H
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
; ~" {2 L( [# W- `7 n mcasp->regs->XTDM = 0x00000003; // Slots 0,1
3 [& I0 G* Z1 s4 t* P mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
) G( \ a8 L0 ~; _$ v mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256# P$ V( \, ]- S; F3 w0 `* [) T
5 g/ H. H. B2 b- y" x- E mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN* v: n- f& S3 q2 S$ ^4 ^
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
# N* h/ n3 d4 E' `- Y mcasp->regs->PFUNC = 0; // All MCASPs
, N$ z+ H' f. L mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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, Q/ k1 E/ ~, X& a) r4 K mcasp->regs->DITCTL = 0x00000000; // Not used) e' A' D3 ^! N8 E! a, x
mcasp->regs->DLBCTL = 0x00000000; // Not used
* A9 y# w: D0 r& |0 u# l6 I mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/1 Y4 M2 _1 b# C
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 2 W* t7 ^4 t; N
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
& z/ _ ~# W% r. ^ mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; , {+ Z. I7 i# U
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );+ N7 {. T; Y" |1 s
3 W1 f* w! t* W" k
mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
: h8 o8 X Z. ]8 l! y while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );" v" ~1 j. O9 e! z# H/ G
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; ! |! D6 Q1 i r/ M9 I8 ]8 T
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff;
1 D: \- P. N2 b' R3 e0 O; B. { mcasp->regs->RSTAT = 0x0000ffff; + p3 s8 s3 m) W/ P% q/ ^4 I
& |- v# m/ B( b; v6 `- i
mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;; B9 }. r! l& Y. ^! O$ ~( ?
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );) R2 @1 L: y% z) d) `5 _8 A6 U
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
/ ]& S0 K" D: Q while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );8 u) \, K1 I. R; ~7 J
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/* Write a 0, so that no underrun occurs after releasing the state machine */% Z1 P4 S" y0 A# ]! t; C4 J
mcasp->regs->XBUF5 = 0;6 m+ w) s4 j* R# `* ^
mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 6 U' H, v/ U' g4 F7 @$ o
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );( e, B7 N: f Q$ I1 ]
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; ; E8 [' g& g- u( @0 ?& H
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
z/ P2 B4 I" @) L% s' b K: u9 `4 ?+ r& ?, A' ]
mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
{8 o! @! r$ G, d7 d while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
5 H4 P, e; u7 f3 V3 W mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
* @4 I9 m1 s: d& F# B while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );3 m9 }5 t+ m; [* a' z b! L% b
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CSR = 0x0000;
. o+ Y4 g- u( W, F: Y$ F INTC_INTMUX1 = 0x3d;$ i) K0 q9 Z; A) F3 i
ISTP = (unsigned int)vectors;; M4 O1 K$ h n+ c% f* n! I
ICR = 0xFFF0;
1 n6 C8 v: |, Q IER |= 0x12; 2 l# ?$ S4 I! S% T7 f8 G
CSR |= 0x01;
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; D8 v, b3 v6 o: x7 b
还有就是两个输入输出函数:8 A @# i% @4 A& ?5 `0 I
void output_sample(Int32 out_data)
9 s4 S$ R. D+ A% H{
! }- H: m4 y: d' Y( W5 @# y AIC31_data.uint = out_data;
. {- K( p E' q! v( X& D MCASP1_XBUF5_32BIT = AIC31_data.uint;" L" n L0 D- M! g
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Int32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
+ R! c4 W/ ?# T7 N S return (AIC31_data.uint);
& Y- y8 t0 ]( P# l4 @6 F/ S$ B}
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