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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:
; k: B0 Z- S% `4 b, Smain文件:
; b9 c; _+ P$ u) E T" D4 @interrupt void interrupt4(void) , E: J- U- I$ Q
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Uint32 sample;
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3 n, {1 ?6 O( S# H, o$ H sample = input_sample(); // read L + R samples from ADC1 v1 ^6 A! ]2 A$ R; h, I' u
output_sample(sample); // write L + R samples to DAC 1 s4 \( Q+ h' Y/ V2 k, f1 G
return; D# L' G, L U9 n/ a2 c
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int main( void )
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3 j- f3 Z* _6 g' V5 w /* Initialize BSL */
+ n- p4 b5 y& W! K5 P7 x EVMC6747_init( );
$ [5 M6 J' `3 U. `% n! r1 J2 r /* Call evmc6747_intr function */
! l# ^: o/ @6 u9 E aic3106_init( );+ u; A# J; W$ a# K2 H& y+ h" |) `
while(1);
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' e. y/ [9 A N3 m4 S8 w0 v7 R2 Xaic3106_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$ K" w2 {1 z0 D* J5 J q& q
/* Initialize MCASP1 */
" B' _6 X: k4 j/ l/ q mcasp = &MCASP_MODULE_1;
( X- p* ~" @# O$ Z3 `+ T; h4 { mcasp->regs->GBLCTL = 0; // Reset
W. X) i0 L& D5 o9 R/ S$ S6 j; ` mcasp->regs->RGBLCTL = 0; // Reset RX
0 ^' i: u' @# R+ r: c6 m) T* F mcasp->regs->XGBLCTL = 0; // Reset TX+ v: o) N! S; O/ p$ L" Y+ l
mcasp->regs->PWRDEMU = 1; // Free-running/ o/ g% D" ?, R! w4 L* G) s
// configure McASP0 receive registers
: x0 }* Q1 v* Z+ o7 k6 D% D mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
( u/ {$ f% f7 \ P4 {6 H* V mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus; R3 w7 K. r7 H. W/ q
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word m1 d) c8 L' q- P9 P! b
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)! Q, B& h9 i9 P9 j: E4 v; r
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)! E; c9 L- {& h" F0 V6 @
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
1 a7 U* E+ A2 P! m0 B8 ?, m mcasp->regs->RINTCTL = 0x00000000; // Not used% m9 G- i4 E3 q6 R# v- _3 ^( L
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2561 R- T! e& _, ]; R
- s3 o7 Y4 B" O/ Q. A+ t. w& y- J/ { mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
6 F I6 v# w' l4 n' N: o mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
+ y( j+ |* |' `, H4 n1 ?; e/ ~+ C mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word* U1 M2 W" e4 E# s0 V) P2 c) ?' a
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16; e; [+ U; ?) ]! P
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
' ?# Q. y& m9 |2 }* N6 v mcasp->regs->XTDM = 0x00000003; // Slots 0,11 Y4 _" j2 Y' N% p+ z; U
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
. b* X2 J2 m+ U/ [! w( u mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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$ w; `8 h9 N- D! n1 e mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN2 h8 @1 I- m9 {/ O
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
: O! M" ?$ H0 ^; @4 L% Z" p4 _ mcasp->regs->PFUNC = 0; // All MCASPs
( [) l+ @; Q* ?9 |8 y, b mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1; m2 Z4 P ~, r
/ U+ m, h/ \$ w: I) P. E mcasp->regs->DITCTL = 0x00000000; // Not used' Q# h- x/ D8 j
mcasp->regs->DLBCTL = 0x00000000; // Not used& B0 ^1 d, @" ~* T0 g1 Q
mcasp->regs->AMUTE = 0x00000000; // Not used0 d; ?- Q6 z( ?, M7 d! z
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/* Starting sections of the McASP*/% ?8 d0 K; P& E4 e9 c! _3 v5 P! b
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
- O" f+ o/ X. I; w- e while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
+ X' ^* M% P# C3 F Y mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; # W6 f. K1 h% v2 r
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );, H* i& I( Z# ^' d- I3 t8 B
4 ]7 D- W3 _$ J$ [* s; G$ q mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; ; M$ {" K$ {/ L, U, j
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
( s) m/ W. y3 O! }0 _ mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 3 ~% Q C* `8 x/ |2 w; ]
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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X/ n Y" V: ?+ ^' n mcasp->regs->XSTAT = 0x0000ffff; 3 \& p8 a$ G# k6 \( R n
mcasp->regs->RSTAT = 0x0000ffff; + r8 d+ o- s& e( X6 Q
3 H$ u( `5 }/ f( d9 J' ` mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;! @! _" E6 K7 T9 J' T/ c8 G
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
4 p( A# J! |3 k mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 6 v3 |9 V0 ?) k+ `
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );* p; P* R* ~ t9 F, ^
# r, J0 q% N$ _ /* Write a 0, so that no underrun occurs after releasing the state machine */) x) p2 E; |! _/ I! H
mcasp->regs->XBUF5 = 0; B2 V" d& e1 a4 J: M
mcasp->regs->RBUF0 = 0;. e) C4 F* s7 D
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 7 R3 q: [" F5 F) s
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );1 ?$ q/ @* @1 P9 O/ y, L" l" U
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; % F; h' ]- @9 }. {
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );/ g; [+ J0 d! @" E' `) j
( v n' v f3 K mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; : @* O n0 u. ]2 }
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
" d2 e( Z% e# L* s& } mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
7 W& f# M3 ?3 T) I3 b8 u8 B while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
8 ?& _, a, a# E' v0 {, Z% F INTC_INTMUX1 = 0x3d;) k- D: a+ W- s2 H. r, N! r! L
ISTP = (unsigned int)vectors;
2 k; g$ W2 g6 h& X$ f ICR = 0xFFF0; * P( ~/ a+ L K) L
IER |= 0x12; , ]) I" P& s$ t; F
CSR |= 0x01; / J$ y6 o% W2 H) x8 _
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还有就是两个输入输出函数:
: M& u. f& o9 X! G9 u3 D) x/ cvoid output_sample(Int32 out_data)
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1 A8 M7 v' K5 \* L8 e+ c AIC31_data.uint = out_data; 4 P8 B0 k, [- w* \* g& O# Z4 X
MCASP1_XBUF5_32BIT = AIC31_data.uint;- G) ] X, u: n4 S2 G! T; g
}
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3 Y+ [, ~, G3 A1 U2 |Int32 input_sample(void)
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$ o/ E0 \" Q" ~ AIC31_data.uint = MCASP1_RBUF0_32BIT;9 g5 c1 `6 T" `3 [" f. W# p
return (AIC31_data.uint);
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