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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:( A! t: t1 b& o1 E$ f
main文件:- @3 E/ E' \) h' }" T
interrupt void interrupt4(void)
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Uint32 sample;5 f8 G/ B. ]" y% _- J3 f$ e
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sample = input_sample(); // read L + R samples from ADC
" V/ [+ I" h0 Y, O# k output_sample(sample); // write L + R samples to DAC
% F2 h9 x# o7 [3 C) A7 o$ b" d* Q return;
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3 m; X4 f$ _* @" O/ v$ W7 g2 b1 |int main( void )
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/* Initialize BSL */
/ ^$ [8 i3 I* A, K7 z( T c EVMC6747_init( );
6 u% s; d1 @* Q% R2 O/ X4 D! O /* Call evmc6747_intr function */
* v2 b/ d, t* T5 ^. I O: H aic3106_init( );
9 J% m7 t0 k, z! b1 ~ while(1);
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$ a+ i% p* D4 w* g2 N8 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
/ s' i4 n7 w6 A# h4 L$ d/* Initialize MCASP1 */
1 c) l1 r \5 z- ~9 I5 M k mcasp = &MCASP_MODULE_1;6 w, ^( b* E8 G$ t# F* z4 I) X
mcasp->regs->GBLCTL = 0; // Reset
7 b3 g/ [; j( b4 X7 F/ ~ mcasp->regs->RGBLCTL = 0; // Reset RX
* S4 K( d+ Z V mcasp->regs->XGBLCTL = 0; // Reset TX
4 ?# {; T# v) W1 c- u9 r mcasp->regs->PWRDEMU = 1; // Free-running
# `8 l1 K, ]8 v( B // configure McASP0 receive registers4 G! N; A" {$ m8 d0 {/ |" D
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used% V( ]3 A! X9 Z6 _& ?
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
% E9 x3 A& j& e! y2 v# I mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
: u. Q# a6 m( p% J% i1 | mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)1 o0 o; q9 y& G* s, \
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)/ c9 V. Q: d, ?/ ]
mcasp->regs->RTDM = 0x00000003; // Slots 0,1; a+ S; b8 a- x i" m- V
mcasp->regs->RINTCTL = 0x00000000; // Not used& h) n3 f7 q5 u8 k. S+ R
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256 y2 M$ x0 @7 B4 a
' K: C# W9 o( Z) d4 ^ mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used. T' Y% _1 e' N$ X
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
" @% c: d6 R! _0 X/ _ mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
5 a' s. C: ]+ | mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
; O3 H1 `7 a$ ^/ P9 I# y mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK. Q$ P: m0 P6 o9 v
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
: g- _6 H* r2 f) p8 \/ \ mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
/ k% V. @# O9 T5 E: a1 p, m2 a mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256/ z6 U" |+ H5 T$ E7 L7 A
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
& x& W5 q) q+ k: ]3 g1 @: y mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT/ M* R/ z" O9 W& j. J, O% e3 q
mcasp->regs->PFUNC = 0; // All MCASPs
6 ]* O" f+ U1 u9 y0 h' i+ K) o2 y mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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* g* S r& N; t0 M7 o5 ]. S( ?; n mcasp->regs->DITCTL = 0x00000000; // Not used
' o! b. R+ H( g/ D5 _( `0 w4 m mcasp->regs->DLBCTL = 0x00000000; // Not used
1 C5 g7 A8 a7 a! R mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/( V' X1 ^8 V U% ~9 W
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; . }; j# c' |# q. {! u8 q
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
% @1 G+ j2 K- ?) ^! M( P mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; * r# n2 Y' ]5 J, C! y) |7 B4 s, ~! H
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
6 y* G! g9 X: j$ ]# Q' n: E while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
: Z; _7 O; r" Y. r mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
& v6 z6 Y6 w0 L) ]" X+ y while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff;
9 h& i! B; k1 l6 a& \9 h2 t mcasp->regs->RSTAT = 0x0000ffff;
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' W& J/ O" T7 J M* n mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
1 R4 Z6 E% n5 I4 d6 ~7 Z5 R while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );$ }0 F2 @$ X1 y. f) A6 |% T
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
% \, ~3 s) s. {6 F/ A: o while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );. v6 {" Y" J; O1 m) N: v
' V, s9 O- D% J6 T( H /* Write a 0, so that no underrun occurs after releasing the state machine */
- j' E% N0 {* K4 H4 e mcasp->regs->XBUF5 = 0;
1 c+ {) i9 }# v4 ^% o' x0 ~ mcasp->regs->RBUF0 = 0;
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! t5 {" X F; a$ \6 P2 n# ]; _ mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 8 S }" v9 ?6 M
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
# @& H4 n- F3 M7 m- {7 Y mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
9 c9 K% t8 {( l" D5 w! z( R while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );: k3 O2 ~" N9 ^ y0 G2 \" K
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
4 Y8 s8 D( e; l& P while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );4 @* E0 H8 R; S2 _+ j1 M& y
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; " h0 p, `& b+ M- {
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );, _' p; S Y: K
* ~, o3 [' f; e V3 V CSR = 0x0000;$ {# j% p' x4 n1 B3 s
INTC_INTMUX1 = 0x3d;
; l5 e/ v5 o, i+ N M- w ISTP = (unsigned int)vectors;
& R# ^/ O' R) C ICR = 0xFFF0;
! l4 @7 L( ?" O' ~, c# C IER |= 0x12;
- G# Y) P- t) ?! l) i CSR |= 0x01; : C8 ^4 K2 }- U, e! z
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. J% K5 P' D' P& o* b还有就是两个输入输出函数: u$ A- d1 Y( u `
void output_sample(Int32 out_data)
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AIC31_data.uint = out_data; 7 }+ @+ F8 r6 ] \4 i, L# E
MCASP1_XBUF5_32BIT = AIC31_data.uint;# V7 Q& n% X' |/ e) |' x' e# w% B
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5 x3 [- m3 ^( D' _! R0 DInt32 input_sample(void)/ d2 k1 L% {& Z# ]: _. j$ D+ x7 @
{
& t3 C J7 q9 z5 `! w' p: l AIC31_data.uint = MCASP1_RBUF0_32BIT;- o) S9 {1 P7 z1 ?% ^: p
return (AIC31_data.uint);
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