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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:
. b1 ^' e' B" L4 {) y8 Gmain文件:
. h5 `8 Y) m7 g8 |0 U rinterrupt void interrupt4(void)
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`. J( f! Z( f6 ]: j+ Q o Uint32 sample;5 Q+ E* D/ V2 b% R4 e, A
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sample = input_sample(); // read L + R samples from ADC# Q$ O: K, v5 f L5 ~
output_sample(sample); // write L + R samples to DAC
* f' E1 E1 N6 y; i e return;
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+ P4 a- M! s% p D3 G! V) Rint main( void )
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9 J# K# H( z( H2 b4 U9 C+ h/ L /* Initialize BSL */
2 a4 O2 T: Q6 \ EVMC6747_init( );
/ A- X7 i3 X: O$ D% j /* Call evmc6747_intr function */ t3 x6 ?4 O3 S! y) L* l4 ~; Q
aic3106_init( );
0 _: X1 a) Y4 Y7 l+ Y while(1);$ D, A2 a" l& ? _6 g+ T7 }
}
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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
% m& m" s! s* c1 W K! D/* Initialize MCASP1 */0 o+ Y' e, A1 N8 [- l. t) ^$ ^
mcasp = &MCASP_MODULE_1;* D* d9 g+ P9 e: I' O- v
mcasp->regs->GBLCTL = 0; // Reset
, O5 o- K+ u$ t% S) g mcasp->regs->RGBLCTL = 0; // Reset RX
# g. [; y b5 a/ M! K mcasp->regs->XGBLCTL = 0; // Reset TX6 v( X8 P$ n. Z6 E
mcasp->regs->PWRDEMU = 1; // Free-running9 x1 x: }, j8 T; }! P! s$ l
// configure McASP0 receive registers2 a+ J- T& x% B4 T1 I" ?. O; @
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used! Q7 x/ y/ W/ \* r- a) R
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus% k6 F% e; R0 f! n7 M+ u
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word+ m! [/ W# J! }6 m3 @% `
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)8 q. Z% O0 h, f @; t+ R
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side). g A3 ?/ B g+ Y1 W( F
mcasp->regs->RTDM = 0x00000003; // Slots 0,1! \% Y2 n( |" z! N, X9 A
mcasp->regs->RINTCTL = 0x00000000; // Not used4 N9 w" i6 l$ G* U; I. I
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256/ u; Z) J" j# f& a
/ n4 Z; k' Q5 o3 [; E s mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
5 y- Y" b& N. b1 \1 f- x/ l mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
# U6 Z" ]. P: I6 t1 f& M+ a, X$ Q mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word, G/ y" V+ |- c) I. G7 x; L6 R' B
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
" `6 d4 \# E1 L mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK6 C. H1 J" |/ K0 \
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
/ ]5 G6 p* F- B6 S" [ mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit B$ o2 l* i# F2 E: y4 C
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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; @5 S2 o* l6 Z mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN/ {4 @, `/ ^4 [6 c( [$ H: e
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
2 s' H$ }. x- h8 c& R4 Q mcasp->regs->PFUNC = 0; // All MCASPs, F' \+ g4 S7 g" z/ r6 T
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used
7 g5 [$ }$ [, w; g3 Z! B) y% o9 F mcasp->regs->DLBCTL = 0x00000000; // Not used
" E J3 K! }2 M- B' m' t) _ mcasp->regs->AMUTE = 0x00000000; // Not used
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0 l. y% n$ U6 i% u2 I2 k/ d( t/* Starting sections of the McASP*/
+ J2 }. j* m( C1 \) A2 }6 z6 [, L mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
! I$ c2 X5 U- q4 {% Q while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 0 ?0 Q% J# q2 W+ V0 \
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
2 }- q& a0 m) S8 I8 b while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; + H7 q N9 b/ `$ D/ A7 m6 b
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );3 q1 W! g' f' S9 B) t
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
- z" p! _0 b* p! N5 F9 c. U5 r while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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/ f. g8 O' B$ J3 | mcasp->regs->XSTAT = 0x0000ffff; 1 ]: K) Y7 `3 f; N3 k: Y; L2 P
mcasp->regs->RSTAT = 0x0000ffff;
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6 S3 h+ d4 d) v v) c mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;0 ~- U3 J% R6 k( N4 O9 v; R% h
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );/ N' L! ~ ]: ?, A9 h; H8 [
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
; A) f5 S4 g4 N; ^4 ?2 e- [ 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 */
7 `& |( a0 o U: w$ {% T: Y mcasp->regs->XBUF5 = 0;
9 t: N, ~/ J) d( ^ M! |! e1 O mcasp->regs->RBUF0 = 0;5 e* v- h4 e; R
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 3 i3 Q: ]8 E6 {, G7 V6 R0 l6 y
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON ); u% {9 g3 V, m K
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
: ~/ u# X- ^1 O8 N- a while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );/ H& ?0 b8 f5 \5 X6 r, T' ]& X2 r8 z$ p
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; % @/ h2 I1 G0 y" l; |
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
& e* h5 F9 G* M8 O. r mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; C. C" ?" C8 b% B! U$ M7 e
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
* ^( H- v- q: o3 \0 ~ ~8 | INTC_INTMUX1 = 0x3d;& [. k- w l% o! `4 m
ISTP = (unsigned int)vectors;6 O( N$ u( E( y+ o$ g+ o1 n+ {
ICR = 0xFFF0;
7 \1 Q1 ^* b& k) h" O IER |= 0x12;
' p" ~) G) K1 w1 ` CSR |= 0x01; 6 w; {) ]3 H6 A4 j1 [
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5 S! C7 I$ {% P还有就是两个输入输出函数:# T3 B* Y: H9 n0 |' O4 c/ _1 f$ }8 j
void output_sample(Int32 out_data)3 p+ K: _7 b/ U& [5 d% N
{
3 h5 `0 H' B) Z7 L+ \* l AIC31_data.uint = out_data; $ \- O% G0 u2 w1 i7 R0 M2 D
MCASP1_XBUF5_32BIT = AIC31_data.uint;
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/ U" G1 a) H' f3 |8 r e8 uInt32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;& M4 ]& d9 @7 W9 t' x
return (AIC31_data.uint);5 g& X% n" ]6 q/ [7 [0 n* _
}; _9 c- p% h) r4 l
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