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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:( I4 K z5 K+ j3 G
main文件:
8 ^1 s2 P5 k X1 _5 hinterrupt void interrupt4(void) : l6 p/ D: R# v+ V' Q" g( h8 C9 i+ S
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC
0 T7 B; n. a+ H( N: f" R output_sample(sample); // write L + R samples to DAC 1 W" A% N0 K$ U0 a w) A- K
return;8 D& l& E# I0 y# `$ L$ `' ~8 {/ f& ]
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int main( void )* s) H+ N: V3 M* n
{
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) _: M! s' W/ s5 k /* Initialize BSL */
$ S: ?+ ?4 r/ P: c EVMC6747_init( );# W1 q Z$ V( _1 T+ g6 N' r% o
/* Call evmc6747_intr function */- c3 `6 Q$ w/ E; P
aic3106_init( );* L& d8 W% y$ V5 |, k' N
while(1);
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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8 x" l4 L' E4 ^, X# V& }
/* Initialize MCASP1 */+ A: Q1 Y+ c4 A2 j; B
mcasp = &MCASP_MODULE_1;4 `0 q F/ t* ~- R- Y
mcasp->regs->GBLCTL = 0; // Reset
) @: ?2 l2 S3 v7 o6 Q8 r9 ]5 s mcasp->regs->RGBLCTL = 0; // Reset RX
! H1 w0 e1 H* j3 u9 | mcasp->regs->XGBLCTL = 0; // Reset TX
6 h4 q/ R2 \ B. O" [$ y mcasp->regs->PWRDEMU = 1; // Free-running7 D, _7 L2 J8 q8 ]
// configure McASP0 receive registers
E: V, b% a9 t# T# x& v9 ^1 g mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
/ `+ j2 W5 p$ C9 Z" K2 R& a mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus' R4 k4 w) b3 r6 [
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
0 N2 H0 W7 u5 i9 t2 |1 q6 W mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)* K" k; |" O( e% [, S
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)4 ]& e1 U" w5 }9 x% z
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
% [" ~: G# y* ?4 E8 S. \! w mcasp->regs->RINTCTL = 0x00000000; // Not used
9 y7 @1 P/ Z. E, c mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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9 [& N9 X( s, g. s) p5 k/ r# u mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used6 |6 k# q$ [- e6 r; l( \
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus# W2 R! d5 U7 l8 _
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word5 M; P/ g7 v3 T
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
' r5 H8 d4 f8 X mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
! V l; J: ^2 z6 l3 J6 G mcasp->regs->XTDM = 0x00000003; // Slots 0,1
: v X) f- V2 \; ~9 Q mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
% _+ O. _( I F) p mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
% s& D. z6 g4 ^% w0 t3 o7 v5 | mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
- B; ^6 S! G6 G# U' l! A( P; e mcasp->regs->PFUNC = 0; // All MCASPs- Y! I2 k1 J6 n c) n
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX13 m+ l5 ~. Q0 z' h9 z9 l! U
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mcasp->regs->DITCTL = 0x00000000; // Not used5 d6 {: p" L, s h9 \* ~
mcasp->regs->DLBCTL = 0x00000000; // Not used
8 K" U- j5 G1 P* [ mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/. g" A" l U# E( I* v
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
1 @; ^' C8 B* p* T while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
. C' ~9 o! X! T( F mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
5 X# u+ r5 d& B# w" e: L; N5 T while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );3 D' t- l2 A4 c& o* u( H
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
" ^. C) _' c D8 ~$ L6 M8 U while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
% u. Q7 H( E0 b1 D2 y5 }0 }5 I( ~ mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 8 E5 W: D) f" Z/ j$ Y. e: g
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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% g9 g3 s2 c6 [ mcasp->regs->XSTAT = 0x0000ffff; - u9 C( b, }1 r5 m
mcasp->regs->RSTAT = 0x0000ffff; ; `! A2 r& z$ B$ c- @5 x
2 Y+ S+ x) C7 b0 A mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;: g+ w! ^" A/ G$ \
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
$ e- Z; j) W5 R: _- s! Z# u( k mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
4 f6 |& m! C" P9 I. L while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );+ g& j4 t5 {) K( K" \$ c
" d# [- X6 b$ a8 @# Y j2 _* C /* Write a 0, so that no underrun occurs after releasing the state machine */
$ i5 N, X% W |6 u; ]0 l2 f0 Z mcasp->regs->XBUF5 = 0;
; h" F9 _8 ^" v7 X7 Q, d mcasp->regs->RBUF0 = 0;
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/ i) r: I. o# W2 r6 q' Y mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 2 j: J( R G2 B! N9 K
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );6 m. X% R* E6 c9 i- G6 v5 P
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; : M+ G3 K4 Z4 v+ V% c
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );* x* r: G# v ?4 c# i6 g) y- y# `
2 [/ L: H0 ^* P0 a$ O! k mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; g, i( T3 {; H
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
- d( {6 V. M9 o4 i' K& G mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
; d* T1 T. Q g; B. O; P while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );+ O1 u. G0 G* s
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CSR = 0x0000;
1 S! f% L. `& A5 P INTC_INTMUX1 = 0x3d;
5 x @) j7 F; R: J" v" G ISTP = (unsigned int)vectors; l7 K& C& O0 F7 \6 M$ G' k1 R
ICR = 0xFFF0; 3 _( m) |2 E% }# F- t7 w
IER |= 0x12; ' t& m6 n# i- I I& c
CSR |= 0x01;
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9 N, o0 S1 A5 V* i: A$ i5 {2 z还有就是两个输入输出函数:
$ r- m0 T6 Y% _! Jvoid output_sample(Int32 out_data)
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2 g' A+ }- H* H# m; P AIC31_data.uint = out_data;
. m- d# I4 q( P' }4 j MCASP1_XBUF5_32BIT = AIC31_data.uint;3 O9 Q4 N: p8 J% j K9 P s/ Y1 X* g
}
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! |* v1 k7 ^. m5 O. {; |) L2 \Int32 input_sample(void)! O- \# Y- C0 r% E( x
{
) m6 ^& T3 W+ \) f. @5 q8 K5 P AIC31_data.uint = MCASP1_RBUF0_32BIT;) ?, M [, ^8 j% A* l
return (AIC31_data.uint);2 A7 `, H" i. ?2 ]# x' G! _
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