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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:; h5 ]$ x. o: _( h
main文件:* y O) Z6 N7 e6 W0 }
interrupt void interrupt4(void)
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6 _4 d% W$ N# V- \1 n# I Uint32 sample;; A3 @0 X, y' _8 t( M J
& h2 `4 Q- M6 l. w' v% e sample = input_sample(); // read L + R samples from ADC. |: R' `4 P. f
output_sample(sample); // write L + R samples to DAC # l- o- W; G3 j7 _9 \. p. [
return;- |3 b+ N/ ?& w* J& T. e
}
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int main( void )
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$ H, A$ H- U6 g/ `# R% m/ L" O /* Initialize BSL */! l2 \$ I% T, A, `; \
EVMC6747_init( );" D1 J( ~( b. T+ Q, `; v
/* Call evmc6747_intr function */
; D7 j& N1 @6 C6 V/ Y5 h! w; j9 @ aic3106_init( ); D* @; ~+ O1 s! Y. Q
while(1);. | ]# p" v! Z) D" I
}
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% A& h' y6 g( p- V3 @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, e# W6 F( g% S+ Z5 |3 {
/* Initialize MCASP1 */ d8 }8 T3 \; p5 {9 d7 J* L( L
mcasp = &MCASP_MODULE_1;
R* M% g3 N# T% w& a mcasp->regs->GBLCTL = 0; // Reset
0 b% G/ i$ s4 Y6 p) [ mcasp->regs->RGBLCTL = 0; // Reset RX/ f0 O; T' s+ g6 P4 S% O# u8 h8 h
mcasp->regs->XGBLCTL = 0; // Reset TX
5 f. ?! _" M7 g1 J7 u$ i6 l* O mcasp->regs->PWRDEMU = 1; // Free-running! b5 G7 s2 @$ D, y' ?8 y
// configure McASP0 receive registers
* v& G" u5 l) p4 w mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used, A6 U- b/ b( n) L
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
+ B5 X- g* d2 J# n mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
$ i$ \/ G- l; w' L X5 J: X A mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
( e6 U' w' g) U- l! \ mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)0 B7 s# o7 g: t5 f# A
mcasp->regs->RTDM = 0x00000003; // Slots 0,1, p2 K6 W: ~+ ~/ }3 m& `/ I
mcasp->regs->RINTCTL = 0x00000000; // Not used' d! |' {3 C9 Z8 ~ o
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2565 y! h+ z0 t+ H* A
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used- R! _. N* v1 w3 z1 `5 M y+ l
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus; R7 @! ?& C6 @
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
$ }6 K+ f5 m o mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
% e7 y+ e2 a& E t mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK4 `! r+ n! T3 n% i2 Y: k9 Q
mcasp->regs->XTDM = 0x00000003; // Slots 0,14 I( ?% c+ T; ]7 R( X3 D# i
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit) p, \! l2 ^( u5 B* S) @* K
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN0 n. h$ i% u( s# J! r
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
1 s- @! \* V# ~ mcasp->regs->PFUNC = 0; // All MCASPs
, F3 o3 y3 Q% A1 z3 l mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX14 g' i0 J4 O, s
* u& T* U! H: l2 d$ Q mcasp->regs->DITCTL = 0x00000000; // Not used
& X3 y5 \6 n" ?) l+ Y mcasp->regs->DLBCTL = 0x00000000; // Not used$ x5 g9 N4 w, D: J
mcasp->regs->AMUTE = 0x00000000; // Not used
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) g/ o0 s1 o5 X1 ~$ F6 x/* Starting sections of the McASP*/- W+ b" T8 G. D( [8 T* [. F$ _* e4 ]
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
3 t& t% R9 d% z( z while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 9 A# \! z) Q5 v: f4 }
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
& h* n; o) ?2 e7 {. w& `4 M while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
9 L; ~' w; H7 V% Z* n* X' L6 S while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
, q1 g& J4 H; e. l# d+ v, _ c mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
6 C% W) ~6 o# G7 o8 P while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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$ T N- h0 k$ ~. d J! p2 L mcasp->regs->XSTAT = 0x0000ffff;
: k$ {2 P$ b/ F2 Q }4 o B mcasp->regs->RSTAT = 0x0000ffff; ; Z! G8 N2 a u
/ Z) K0 @( |$ P- ? mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON; D% e; V' H: b% H: F
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
& D8 }+ s4 V1 T$ L9 U$ W+ ~ mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 8 R! R+ O: Y1 h
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );. F/ s" v6 S& L. U
9 T+ D9 T. H; H7 E9 Z! C2 F /* Write a 0, so that no underrun occurs after releasing the state machine */6 R( X5 x- {, \4 d4 T6 K1 E
mcasp->regs->XBUF5 = 0;) x" G. C+ B# A% r/ j
mcasp->regs->RBUF0 = 0;6 x5 K' w5 H3 L: T3 L' k5 b
/ S1 T& R, J/ y& F O+ G$ P3 Z mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; . o1 F$ V F% h( ^1 m& R- O+ [
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
7 _8 Y; ]4 A% E% F- x0 j4 L mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
( I7 \2 \3 m% _2 C while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );- f& _ u5 a5 H+ G3 T+ Q3 S; f% [
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 7 X8 |4 w+ o" {2 G2 a0 P8 y
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
; ?+ N% l+ [+ f, U; S- b# B mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; ( @( W, s; i9 _, C. b! F) A
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );& n: P+ B6 I4 l
: b7 q; j/ w# `5 m6 y/ L. R CSR = 0x0000;0 j! h( S, x4 N) p, \
INTC_INTMUX1 = 0x3d;
2 K! m; I0 o0 i6 x ^ ISTP = (unsigned int)vectors;3 N8 B# v1 f; d3 D! R
ICR = 0xFFF0; $ {/ V/ v7 D% Y1 T
IER |= 0x12;
$ I4 p; g6 @) f; Z# m- ~& M CSR |= 0x01; ( t" |! l8 k) F
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' V: I$ X9 _# y) P) k# |还有就是两个输入输出函数:
! S; [: |% C8 k4 j4 tvoid output_sample(Int32 out_data)4 b/ j2 o( H, g' C6 Y) @9 O/ U6 R
{
: Y, t5 t) K1 w3 L AIC31_data.uint = out_data;
$ P. S$ I) `: _1 O; L MCASP1_XBUF5_32BIT = AIC31_data.uint;" R2 g" e1 k, z0 o/ A
}
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Int32 input_sample(void)/ t. U" h4 f0 ]1 z8 G
{
9 h; M8 o' A, U1 I2 Z AIC31_data.uint = MCASP1_RBUF0_32BIT;
. J! T/ _9 V4 u# j return (AIC31_data.uint);: j) S, I+ H( T, c! K" b
}
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