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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:3 f8 w }* b1 H- k6 y( Z
main文件:
3 N& h4 x7 H) pinterrupt void interrupt4(void)
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Uint32 sample;; V9 {/ r9 {9 [* j, F- \+ N9 y
) n4 ?$ X. P- o, A& k: L sample = input_sample(); // read L + R samples from ADC' O) h* x0 r% a% b
output_sample(sample); // write L + R samples to DAC % x' I( V2 @" Y
return;
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9 \# Q- D6 X. @ i- Vint main( void ); f" D3 I% p' F3 ?0 |, n/ c! a
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$ ~0 d. E, N' a/ Z% Q, D /* Initialize BSL */) A* L# y( b* @! ^
EVMC6747_init( );
" H* y) {4 M6 o, {: ^9 i /* Call evmc6747_intr function */
. Q* u0 n' G) Y' x) S aic3106_init( );
# I3 @* ^# r7 ~! g9 y- m/ { while(1);* T! G( T4 G. K7 c. W7 Z
}
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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
7 }% x0 `3 z' Q6 U/* Initialize MCASP1 */
3 K* b7 L. m8 R2 z7 U6 l5 f& G mcasp = &MCASP_MODULE_1;
5 N' R/ X; `# W: o2 H5 X* Z2 z mcasp->regs->GBLCTL = 0; // Reset1 p' z# Q$ U! s' T& T
mcasp->regs->RGBLCTL = 0; // Reset RX& N! g5 M8 m% k% [: d
mcasp->regs->XGBLCTL = 0; // Reset TX
; R! Z+ q* q8 g+ g3 G0 k mcasp->regs->PWRDEMU = 1; // Free-running
0 y, V+ A" ] }/ e7 [/ w8 j' c7 a2 K // configure McASP0 receive registers
7 [% b$ J+ z% R, A& n$ u4 t( E mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
- ?& V0 O+ d! ?0 H; B m( r mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
/ { Y% w9 y& {% }" {# x mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word" ?. q. k% N3 Y0 o8 Z, b$ t# ?& m9 S" r
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
m8 R2 h! Z; R5 G* C8 s mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)6 ^# n+ K7 R. h2 h4 y/ I
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
* N. g& j! o" w6 c4 B- D mcasp->regs->RINTCTL = 0x00000000; // Not used# c& B) _# g" A5 n# Z* R/ l& g
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256& h: P2 O% s* S! S* t7 ~3 N; m
, {: c+ O$ p* ]3 d# {8 ~" ^6 _ mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used' O& }1 w) l; [
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus/ @* F( U& k2 z# T* }5 @/ f
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word' w' I: } ^) \% A, f1 O; X
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
1 [7 h6 g, |4 W1 v6 B% Z mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
: f9 p; H, b q9 } mcasp->regs->XTDM = 0x00000003; // Slots 0,1: h5 C6 Z3 W+ q& u# |0 E9 d
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
% p" b4 C5 f+ A/ i mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256% J& v7 g/ R: Q& A% P, B
1 K* j2 n3 e: s" z( G# z, p* Y mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN% [, h X% B1 E
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
, ?# x3 F6 K* y4 n+ H) h& x7 ^ mcasp->regs->PFUNC = 0; // All MCASPs$ f q# ^: f) P
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1& p3 v8 A& e: z/ J, s7 D
" q6 b! n# w+ o& T/ ? mcasp->regs->DITCTL = 0x00000000; // Not used& n0 F0 c& S0 N: U0 e
mcasp->regs->DLBCTL = 0x00000000; // Not used+ v, w2 Q2 F; Y& j
mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
& I6 I8 e) Y4 m, R5 \7 A mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; ' ~! u3 [& U2 @8 F
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); " O. ?; E2 |+ c
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; 3 ^* r! l2 ?% x3 o) v
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );+ @$ L& f5 }5 ~0 g) A
5 T- W9 e" C. ~! t* v5 k mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
) [) D% c( M' M, | while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
9 }& ^! X* ?5 Y1 A1 {) B8 J mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; " U/ E! [) @, H$ {2 L5 k; v: m
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );7 H- J& l" D- @: d. i" j& k/ Q) |
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mcasp->regs->XSTAT = 0x0000ffff;
j, ]! b t2 s- c9 U mcasp->regs->RSTAT = 0x0000ffff; 6 f4 B5 B6 t9 K1 i
* e' E$ l% S2 @ mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
2 A" g/ C3 t" U& k while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
5 x* X6 V6 U' w8 m8 _3 p9 T# t mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; ) i# u1 j0 `& |- @
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );0 P6 X3 c9 P! `2 X. E
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/* Write a 0, so that no underrun occurs after releasing the state machine */3 a+ t( _) M+ d' R- Y
mcasp->regs->XBUF5 = 0;6 U4 G, ^7 |8 Q7 f& i: I
mcasp->regs->RBUF0 = 0;* L! P9 h8 h, @9 ~5 f; [- v: W
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
( C/ z: J! O! H( y5 { while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
% q' L$ d2 I% }, m: D# c mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
; I7 G7 z& h4 M1 r7 U while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 8 B* a# E1 y/ ?" z) `! r, }& |
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
4 W a" }' } F+ Z4 J9 C4 ^ mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
8 _1 _4 g3 s! |: ?+ g while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );, r5 {, d( n+ D6 m
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CSR = 0x0000;
' [' y/ F0 ~, F! q9 O INTC_INTMUX1 = 0x3d;9 x4 D. |. z1 |3 \3 @2 ~9 S
ISTP = (unsigned int)vectors;
$ J! t6 G1 q1 K0 f4 J: b( O ICR = 0xFFF0; 9 O: s$ Y$ Z; R6 f. ` {$ M
IER |= 0x12;
Z% \2 d, z7 i" A CSR |= 0x01; + f, Y3 u7 J9 _; g z* f0 m5 j
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/ W" ~4 E1 G0 _5 i& r- p& S还有就是两个输入输出函数:
, ]* ?* _( Q( f0 Vvoid output_sample(Int32 out_data)8 F/ H1 i7 d' U: u; C9 J: ~6 e' Y
{
. t4 N1 Q4 Y* K! ~ AIC31_data.uint = out_data; 2 P* m9 E/ g6 }6 ~4 @; J
MCASP1_XBUF5_32BIT = AIC31_data.uint;
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Int32 input_sample(void)$ `9 \0 n5 J2 ?8 ^% n7 h8 B7 O& k
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AIC31_data.uint = MCASP1_RBUF0_32BIT;' i# t) c+ u! @$ o- o$ t: {, K
return (AIC31_data.uint);
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