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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:5 \( p( m9 F2 m
main文件:
6 O) C# D# s, {& `$ v: uinterrupt void interrupt4(void) % }6 b! _3 X) y: U5 T! J" ?
{
; U- g8 h9 l* {) b, D1 s2 [ Uint32 sample;
/ a( A8 S( G3 {# C0 I( V# A5 @# o
5 |- u6 M" N5 |0 i) z9 l sample = input_sample(); // read L + R samples from ADC
7 A/ f5 W4 \4 }" Z$ l& q output_sample(sample); // write L + R samples to DAC , _8 i( h! B: i2 z1 r, d; I$ \! D
return;
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% }; @( e9 r9 @1 Y+ @4 G3 wint main( void )
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! }; N0 b1 U2 c: C$ b; M+ A( | /* Initialize BSL */8 z1 b8 m* L; Y$ g" | d! x
EVMC6747_init( );% b J, r8 p! E' A
/* Call evmc6747_intr function */
" \! d' u; ]# {( K0 N9 T$ z! D aic3106_init( );
5 k3 B9 p/ ~% W+ L" |1 M1 u while(1);" e$ P T" _- u, }0 O2 `8 k' }0 ^3 v
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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
9 I& U, V) R2 p3 a7 R/* Initialize MCASP1 */" S- z+ d, _8 g( E
mcasp = &MCASP_MODULE_1;( [1 A# ~# B' }4 _8 l1 V1 i/ @4 u
mcasp->regs->GBLCTL = 0; // Reset# q' o- e( q$ z7 n8 @! G! D
mcasp->regs->RGBLCTL = 0; // Reset RX6 u6 ~. @; F; {" S" ^: q+ h6 a& V
mcasp->regs->XGBLCTL = 0; // Reset TX
! D# X6 a3 m1 R& s mcasp->regs->PWRDEMU = 1; // Free-running
& p3 C9 Z6 F2 D' P; D* b. X. ?) A // configure McASP0 receive registers% ]; B( W$ _- ^
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used& _. X+ I0 R g& Q9 g
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
8 V$ e9 b% l/ m4 j- E- l$ H" d mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
+ n7 y$ t3 A) \0 Z( e0 r mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)! S+ b7 ?& o1 n. q
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
" v/ l( [5 J4 Q+ o, z$ Y2 z mcasp->regs->RTDM = 0x00000003; // Slots 0,1
5 j1 u% a/ u9 |! y5 \; E$ e mcasp->regs->RINTCTL = 0x00000000; // Not used
, @" S9 L" ]1 P/ X: x3 Y% |8 k mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256% x% u3 g! E6 a+ t- W3 x7 G
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used3 m7 x# {% ^ f7 W1 X7 q
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
+ }, |7 B$ T3 c! P9 \ mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word, [) o0 V- |3 S6 |7 N9 I
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
/ o* Z+ [) s" ~( |& J mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
! q3 S5 @; ~; F: D) ~% t" L0 _" ~ mcasp->regs->XTDM = 0x00000003; // Slots 0,16 b- A) |( ~9 m8 I7 ~
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit3 L9 }7 r1 K$ m! B( v+ V8 S4 _
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256% p! M# F! Q: U! X3 T
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
( p3 q, p7 Q, G mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT" P t6 [- _8 c# @) T0 J: z
mcasp->regs->PFUNC = 0; // All MCASPs
8 E0 T a# e0 ]8 e. g+ T mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX17 o# w) a! I3 K: b; F
3 f7 i) j3 }. E3 x: e1 ~ mcasp->regs->DITCTL = 0x00000000; // Not used6 B& I9 B2 y+ q7 E9 l6 @
mcasp->regs->DLBCTL = 0x00000000; // Not used
& }4 ?, |, L! A8 h- T mcasp->regs->AMUTE = 0x00000000; // Not used Z! b }+ Z% w- r# ~
6 ?1 |' B5 W) ^/ ?/* Starting sections of the McASP*/
* s& c* y' _: l1 k, i mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
, ]5 L: k4 _0 W& F7 R6 V while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); $ f* r& S" P1 ]* D1 u& n0 L
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
; X; }- P6 D5 g$ e while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
+ l0 t; V2 A" O D" q7 F while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON ); m/ B4 P2 U$ m2 _! A
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; $ s7 H. p; o7 e* {7 \7 r% j
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff; 8 `8 j9 p; O- l5 B' c& |
mcasp->regs->RSTAT = 0x0000ffff;
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* i1 D3 t0 n0 t* T% p. z' k% F mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
2 |5 F) n; a# r& w' n while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );0 t# N0 Y* f: v
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; ' F# j$ J! W0 I
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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) E$ G# K+ s1 M4 M /* Write a 0, so that no underrun occurs after releasing the state machine */! Q. S$ T2 t8 {7 h6 e! E- G& N% z, F
mcasp->regs->XBUF5 = 0;
: a6 {& S: e# y& _# l4 ` mcasp->regs->RBUF0 = 0;
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1 y8 w; S% C& q$ z mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; " }7 u& x8 _( e5 I7 z6 s$ o
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
; U& Z/ |& A M7 H9 O mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; ) x% d$ |. m+ r$ W6 l
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );0 n. I) @% S" y' u. |
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
7 B& c* T. Q, s& _' z+ p" B while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
! |; W- E) L# j. L mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; ) [- P3 N( W# h7 B7 v. A
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;. S" p7 p3 @' N
INTC_INTMUX1 = 0x3d;
" v' K! K. L% c! r; `) J ISTP = (unsigned int)vectors;6 F# Z2 o: O1 P2 @' Q
ICR = 0xFFF0; ; \" Z v1 R+ c& o% B
IER |= 0x12;
N( P5 `1 v" t) r! b9 { r CSR |= 0x01;
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3 V' c0 Y! K* n9 H3 W0 ?2 {还有就是两个输入输出函数:" Y3 u2 X4 m1 V3 \
void output_sample(Int32 out_data)
% I) F2 [- ?7 r' v" i{
3 ]( b: L, ~3 Z/ m3 Y, U; s6 ^ AIC31_data.uint = out_data; 7 y# R6 n2 {6 q- ?! j, F
MCASP1_XBUF5_32BIT = AIC31_data.uint;
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- G I8 ]5 k" zInt32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
, y6 D* z! j& _" d* g return (AIC31_data.uint);
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