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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 w2 [% D; l/ Z3 W' zmain文件:: R; X9 p. E. v S) |% w8 S; Z. A
interrupt void interrupt4(void)
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Uint32 sample;. h, B+ u/ V* S) q* ~
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sample = input_sample(); // read L + R samples from ADC* n2 N0 _. c) t3 x3 K( P% Y5 i
output_sample(sample); // write L + R samples to DAC
' W8 P2 d0 g3 q3 G) Y9 v return;
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int main( void )
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/ a1 t( n, T& u /* Initialize BSL */7 T1 x' ?2 q" ?# H( t
EVMC6747_init( );
+ p8 `) C: ?0 s' c* ~ /* Call evmc6747_intr function */
. t5 ~- t( z) k$ a2 \2 R4 N2 f aic3106_init( );
- J6 q+ o9 D' A8 r; m) g while(1);
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5 M5 n- U; `: I( ?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
4 B% [. y6 L- T8 i/* Initialize MCASP1 */7 D- ^5 f# O) F* D9 g- x
mcasp = &MCASP_MODULE_1;6 L( S; \: x g% Z& R( h. J
mcasp->regs->GBLCTL = 0; // Reset
: L9 L2 w5 ^( r mcasp->regs->RGBLCTL = 0; // Reset RX
7 b3 s! [- Q. e; f! b ?+ w mcasp->regs->XGBLCTL = 0; // Reset TX
+ O6 g/ E* I4 V+ m' E* b$ U* t mcasp->regs->PWRDEMU = 1; // Free-running# ~7 g" k1 d& i# p
// configure McASP0 receive registers
1 w+ O0 @: N7 {% L h mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used! r" Q H- k9 Z
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus8 e/ A7 ~3 ?. W
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
( S. a }) s9 \$ }* T7 |4 |& o; j mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)/ Q5 R, A' m2 Y5 R0 b/ ~6 C
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)% w$ v( O/ U; U
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
% t5 R7 ?% E7 u8 Y0 O h0 e mcasp->regs->RINTCTL = 0x00000000; // Not used
( C* p6 C1 C$ n! h+ }3 z& a mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2565 P' o1 M0 c6 }6 C6 m- `
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used5 O9 J6 _7 S* i& y8 b$ a- h- H
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
% q0 G9 y! J3 d. s" p" h mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word: h7 O( N2 M1 `% L% c
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16. K0 S4 x8 Q9 a+ e) @9 U; G
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK4 ?1 ]5 y) y/ \$ X; X5 l# \
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
- N6 W: k3 r. O" d- i mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
8 a& Z. P! K; D) V6 p2 T mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256) ~ j* t {% p8 o+ P
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
/ Y& s) P) v! p8 I mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT% I" F' g) S7 x3 _
mcasp->regs->PFUNC = 0; // All MCASPs9 U8 D1 J' l7 @9 ?, V" e
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1- F$ L8 O4 i2 m, }; U
6 F! q0 P+ t, ~5 @ mcasp->regs->DITCTL = 0x00000000; // Not used: P( y/ [; C5 `" k" ]3 c5 V! a
mcasp->regs->DLBCTL = 0x00000000; // Not used/ Q. q4 u3 v- l$ J8 x
mcasp->regs->AMUTE = 0x00000000; // Not used0 G8 }5 i4 [3 J0 d
$ D+ s3 T2 a( I* j; E+ m8 _/* Starting sections of the McASP*/
* B3 m* q% ~5 F- D mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
# V9 N" S1 N! a4 I0 C while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
9 b9 s8 p9 d9 O/ h0 m! i6 Q, L% R mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
0 ~: s2 x. Z7 q4 \ while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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6 V) c- g+ [$ R# g mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; " R& Z" ^ \4 m
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
* H2 ^7 P% W f2 O4 ]3 X6 h mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
- x# _- F5 g- h* [" E7 I2 }- }( r while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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9 ^+ k3 V# ]' b8 l; `; Z mcasp->regs->XSTAT = 0x0000ffff; 6 O% t+ W# ]/ q @ c2 P1 k x1 {" l
mcasp->regs->RSTAT = 0x0000ffff; 6 C+ }( P: x) f6 ~% Y
* {4 g' y# L* B% i0 v mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;% ]! `/ a: \% D8 X4 g2 Q0 f5 Y
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );6 o% i8 z3 }9 C8 Y( _* h4 P
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 0 N' g! ^* x2 l- ]# M8 Q
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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4 o) S1 I6 |' l& x /* Write a 0, so that no underrun occurs after releasing the state machine */: [/ @3 d K& x# D/ W/ @0 }
mcasp->regs->XBUF5 = 0;
8 [7 G* D, k: w* _; w6 L/ t) C mcasp->regs->RBUF0 = 0;, m2 g$ a) v0 q" T& V+ ]4 L
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
/ d/ V+ ^2 K) y! e9 Y) K while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
( k: l Y: {- {$ t* W, S mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
) x9 `7 | p& u9 g while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );3 ^1 c) k' }6 v0 Z4 L9 [# }
0 F# |7 G* H4 {8 f1 u5 R mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
3 S0 e7 ^$ L$ H6 r& P* { while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
6 r! E6 \4 n/ T7 ^7 @9 U2 S mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; - L9 h; a8 p7 G3 x2 f0 N( L0 q
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;; D ^, N+ M8 ]2 O2 v+ F8 M
INTC_INTMUX1 = 0x3d;( ], i% u& @! n
ISTP = (unsigned int)vectors; C2 N) [$ D$ V0 Q6 ^ O. f. a/ [
ICR = 0xFFF0; 1 r0 k/ z# M9 f
IER |= 0x12; ! ^& m, `) H+ q' k2 {0 G
CSR |= 0x01;
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还有就是两个输入输出函数:
# b7 a5 V; j1 w1 pvoid output_sample(Int32 out_data)
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/ k) _/ f% c' u+ i AIC31_data.uint = out_data;
' R: Z6 m/ g3 g K3 o* P MCASP1_XBUF5_32BIT = AIC31_data.uint;, @" d- I: G# h- t# ]3 j L! ^
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Int32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;3 r" _; N& S# p0 w. _$ _- d
return (AIC31_data.uint);4 h( N: F0 j; ~5 {6 ]
}; d3 H" a1 o7 P; E R a, l. Q- t' m
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