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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# X4 k. W0 { i0 h& z3 b+ gmain文件:
0 [% y* o2 W! J- m1 j& z) hinterrupt void interrupt4(void) % U' s( O) X3 \/ @ |
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC
& l: w1 C* `4 m& o' J output_sample(sample); // write L + R samples to DAC
{) U7 a" \! Y- j; J2 t return; W7 @! I" w! g$ d; c
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) M1 I# l$ O7 Oint main( void )
# k: |! }* F! H8 h{
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/* Initialize BSL */
3 N4 T$ s* [) e% o6 z; X/ _8 ? EVMC6747_init( );
0 B2 ?% X' b% U/ i# J /* Call evmc6747_intr function */
4 a8 E" A* `# B% d, N aic3106_init( );
' d3 `5 g9 y4 H* S/ Q while(1);& e. G4 m% n* `( i
}
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) M5 [$ m4 I* [2 ]: A9 i0 qaic3106_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2 N- C5 l: A! m5 m9 M2 a6 R( C
/* Initialize MCASP1 */5 e; ~+ \0 j. U4 W. i
mcasp = &MCASP_MODULE_1;. N4 c0 \3 ~( f' S" [& u
mcasp->regs->GBLCTL = 0; // Reset# t; n7 [" ?1 ?, G- m3 G
mcasp->regs->RGBLCTL = 0; // Reset RX/ ]" X7 M- ^! B. d# W. r/ w5 ]
mcasp->regs->XGBLCTL = 0; // Reset TX( L6 g U- v- c; S* { M5 U, j: h
mcasp->regs->PWRDEMU = 1; // Free-running
- B' p- h$ f- m3 [5 e! q8 r( z. d // configure McASP0 receive registers
. v3 [( @. f S9 z0 k( h$ @( Q$ @ mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used3 E) }8 ?1 Q+ O; j" k4 ?
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
: l" V! S% i: Q# Z mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word3 ]' h3 `0 r( w5 y6 n# g1 P
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)6 W! K+ S2 m; P: u3 R
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side). P( ?; \) g7 F6 s- l4 `
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
! ^1 @3 R% }9 v mcasp->regs->RINTCTL = 0x00000000; // Not used
+ e( o% K3 f, g& z; z mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used9 q E1 |$ o3 x5 P( z# z* ~8 C- B$ J
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
% w1 h5 V$ p5 n. M, F* x mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
0 U7 F0 g. J7 h6 p8 H6 O mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
8 h& \6 F$ a, R& V; ~ mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
+ n6 B0 f2 _+ u mcasp->regs->XTDM = 0x00000003; // Slots 0,1
$ ~$ O" W( [6 A+ h mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
1 Q* [2 m" v& ]+ n mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2569 o0 O6 `. Z8 i! z
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
5 A7 q' n/ T0 l mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT8 M5 M G8 T/ P
mcasp->regs->PFUNC = 0; // All MCASPs
( H4 Y- r; h& z8 c3 z0 J4 \. j: x m mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX11 B# b. g' c. W& j- {6 p( [
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mcasp->regs->DITCTL = 0x00000000; // Not used
* P' B! Z9 N. y$ \ p2 b mcasp->regs->DLBCTL = 0x00000000; // Not used
$ ]' f& o( l. V& s mcasp->regs->AMUTE = 0x00000000; // Not used) M6 W% G* ]5 |/ G0 H2 f$ m
" r; F' L Q" x9 V8 W6 P+ S; R/* Starting sections of the McASP*/
9 g4 r! y f7 V7 o9 A$ L7 E: D3 X5 V mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; ) P e* |& F# }
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
1 B. F9 N0 Z- I& J% D$ m+ A* e( y p. T0 M mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
/ t, M1 g# g7 k4 y- I' F while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; - d- A- i4 K8 j/ C! G
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
% w% e. ~. }6 T' J mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 6 U2 K; e7 E! K i" u% ^2 V6 Q
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );0 }0 x* l+ ]. Q3 R! A/ W
) V1 D" A8 m5 o- m6 H mcasp->regs->XSTAT = 0x0000ffff;
& A( o9 R+ e7 f4 m. [8 o5 c( C mcasp->regs->RSTAT = 0x0000ffff; 5 o* S( {& I/ b
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;. j! K" ?; Q: V; s# u0 N5 l
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );' W( k5 x$ z( T
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
# y% j. b0 a6 J; E4 B, P9 ?- C! P while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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/* Write a 0, so that no underrun occurs after releasing the state machine */
1 `; i- }. q5 V mcasp->regs->XBUF5 = 0;# h% c* ?! q( }2 ^. {6 R
mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
' Y, L- ]8 G6 t6 X! _5 f6 I while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
: M$ E h P. ` mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; $ @2 _" @, p2 l' \
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; * [* a4 Q. |9 I3 ]) C
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );$ _- g: f% j/ D8 G. Z
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; ! r" {9 e6 E. E9 @" A: G
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );+ P. l% G& x/ O# b
3 J/ O' x0 m/ z- _4 S4 o CSR = 0x0000;$ m! R# I/ ]" C1 N L/ }1 T
INTC_INTMUX1 = 0x3d;5 f2 }9 K, X0 J$ W4 V* G
ISTP = (unsigned int)vectors;
0 q( v' s7 j4 V ICR = 0xFFF0;
% T% i& P, n* q& f IER |= 0x12; + V3 l4 I# I, ]% v% B* }
CSR |= 0x01;
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还有就是两个输入输出函数:
( e% s- K( |" A: e" ]3 }$ h5 yvoid output_sample(Int32 out_data)# a: A6 A3 t: z* F) s% y1 c& c7 o
{
% d g! l' h3 m* h5 j c* n AIC31_data.uint = out_data;
a% E( \: p# v( T# c MCASP1_XBUF5_32BIT = AIC31_data.uint;) F/ n3 `; s3 _; m o% a1 L
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3 X+ ]3 }) F4 K( L$ {Int32 input_sample(void)* g/ w, Y$ B9 J5 z( K
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AIC31_data.uint = MCASP1_RBUF0_32BIT;/ Y! V, k$ g: ?3 V
return (AIC31_data.uint);
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