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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- x V% @) U1 V( @2 l/ T% K
main文件:& z, B& f) v4 h* h3 _; r
interrupt void interrupt4(void)
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC+ x5 K H2 |# H
output_sample(sample); // write L + R samples to DAC
% X$ O7 m0 U: ]+ Y$ q# Q return;
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# T q6 ^2 d3 M* p; Vint main( void )
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. `" h; z) g3 \3 w4 @ }2 F /* Initialize BSL */4 q5 ]% V5 o! p7 B4 ]
EVMC6747_init( );
1 C0 m1 b1 s; \6 g. O) ` /* Call evmc6747_intr function *// O0 a, Y0 z0 Q- y6 t% L& E
aic3106_init( );6 _- T8 F e" U- i9 Z% {
while(1);0 g8 z8 o/ \$ U/ A$ e
}
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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
+ W5 J- m8 ~9 {# B$ g( U5 c/* Initialize MCASP1 */3 x: h1 V5 H2 h" z' N$ ^, F; i
mcasp = &MCASP_MODULE_1;" l+ a3 z* O( ]+ ~
mcasp->regs->GBLCTL = 0; // Reset
: j2 ^0 }. k# f9 H8 t( S mcasp->regs->RGBLCTL = 0; // Reset RX
6 v. p4 H+ |+ I- h( b2 L mcasp->regs->XGBLCTL = 0; // Reset TX+ Y& I# `4 [7 \, t0 M$ t G' @
mcasp->regs->PWRDEMU = 1; // Free-running
4 m* B! K+ s8 M; W5 @5 q& o6 s // configure McASP0 receive registers$ C' m- S& ~/ d: W3 O0 p
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
3 n, t! s; o c _: D mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
# M7 L: R/ T, T* P% ~ mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word" S3 l) N8 K) H+ U" v3 [3 c
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
5 D& R* L9 b8 n; c mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
* E" X$ q' u; O. [; f5 h mcasp->regs->RTDM = 0x00000003; // Slots 0,1
2 U, {. g8 O8 M& b4 a2 H% s- _0 z mcasp->regs->RINTCTL = 0x00000000; // Not used* T! d- [2 D5 l: l
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256' G0 N# ]+ o9 y3 o
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used6 ? q# _* I4 `$ y
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
& s( ]9 r: j7 @* c mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word K% f; R& g, d3 y- d
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
1 Z# p4 b7 c' j+ A* p$ W mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
) V2 |" g9 Q, J mcasp->regs->XTDM = 0x00000003; // Slots 0,1
# ~" \' n5 m. z! F% w7 b( ^' k mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
! D( }$ y" Y* O f mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2567 e3 C# e. t: g( q' v+ Y1 ]/ _1 y9 [
! y0 [2 I' u% V6 j0 ~2 Q7 p/ V mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
5 m9 F: ?4 u' Y Q, p4 K$ c3 W mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT: `. ^0 u7 l' ^4 g1 ~ I
mcasp->regs->PFUNC = 0; // All MCASPs) E: l, Z+ l$ Z& o' J, E9 C
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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: g( K& Z+ w# z0 R& i4 X5 } mcasp->regs->DITCTL = 0x00000000; // Not used
- y9 t# H" [1 g- D% t2 i7 _7 Z mcasp->regs->DLBCTL = 0x00000000; // Not used ~; U$ z& Y; }- d4 x5 @6 z* s
mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/+ o5 ^5 D( K) @" i }8 J
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
. j& O$ K7 O# G; Y# L0 s while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); ) _) H1 \* a4 O% M* ~4 W
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
8 A/ @- w1 I6 S7 ^" C( Q while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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# [5 J6 c/ p' o7 Y mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
( k& C0 @5 h# V0 |7 V while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
5 U* n1 k2 p: a7 {+ } mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; / E9 q& }5 Y% \7 y L, d
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff;
3 _, Q) |6 x9 a. p+ C mcasp->regs->RSTAT = 0x0000ffff; $ ~) Y- E0 m( |. @
1 |5 X( ?0 o6 x0 u- }" y/ N5 D mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;: I5 y+ \% o5 W, Y2 u
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
) K4 e, g1 B% L* `$ |6 I% e mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
8 M8 e/ \. {4 a5 ` while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );- I; b' y& l4 |5 y
- h) o* H4 X2 o3 D* _- s9 E /* Write a 0, so that no underrun occurs after releasing the state machine */# l0 o2 R+ M( a0 p& V- k# b. D
mcasp->regs->XBUF5 = 0;
$ b1 t; C6 j ~7 X. r6 _ mcasp->regs->RBUF0 = 0;1 S/ |2 |1 r. Y& \
9 W( J, Z# @3 x( d mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 3 n6 y7 K1 b9 Y z3 i! @- P, W
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
0 k: Y% W, w' [) b mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; 7 U1 N6 [4 i. P2 z
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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& c& |( _! s" e, k' [/ W mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
( ]. A8 Q* ?' S& t f while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
( \3 J0 f$ R& f1 V V( B2 f1 p mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; " h: _, y6 H/ L7 x M( ^
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;8 k& y& I9 ^& i& y( i
INTC_INTMUX1 = 0x3d;$ b: I: t1 y& Q
ISTP = (unsigned int)vectors;2 s! y5 j) g! T3 h$ h/ ?( p
ICR = 0xFFF0; - C1 f7 t% \! D# f3 `5 T$ | U8 Z
IER |= 0x12;
/ x- ?% E T) n2 T. T CSR |= 0x01;
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_4 t" G' {" Z: ?' w! a9 u还有就是两个输入输出函数:
9 \4 d4 P; _0 m% F1 `8 Gvoid output_sample(Int32 out_data). r+ |* g- N4 M) N, W; p8 s# ?; K% b
{
- R! G5 k; C5 W! f# d0 Q. E5 c# | AIC31_data.uint = out_data;
/ v7 N1 O3 f/ m$ l% A MCASP1_XBUF5_32BIT = AIC31_data.uint;4 _# e- V$ S% @8 C \: ]
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Int32 input_sample(void)5 e3 i3 B# [, _$ Y
{
% i5 W- m( s' [" a: L$ k+ f$ y AIC31_data.uint = MCASP1_RBUF0_32BIT;
6 v* s! [& X# p, B return (AIC31_data.uint);
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