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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:: f" Z. ~ t6 H, w! E D6 p
main文件:# B( r/ H2 x/ v
interrupt void interrupt4(void)
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$ J3 \% [% S. l+ W: H Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC
8 B# v( o( `; O# _, a output_sample(sample); // write L + R samples to DAC
- g. B; ?" a2 r/ y5 T return;
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int main( void )+ X- X8 `. A" M9 j8 k! v
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/* Initialize BSL */( k* I; a8 s3 t4 a8 X* i
EVMC6747_init( );
2 D' [) z( N1 w$ M6 B6 H9 O4 W1 l+ O /* Call evmc6747_intr function */
$ ~# M, Z: K% ~- z% L1 J0 X) r& C aic3106_init( );3 b) G: S5 D. k
while(1);1 y6 x8 x0 @6 q: t/ t
}
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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
2 C0 O& L* C8 K6 A/* Initialize MCASP1 */
9 p" c$ W* d: T" ]; Q) o( g mcasp = &MCASP_MODULE_1;
7 w. P6 i6 n a# T! I mcasp->regs->GBLCTL = 0; // Reset( d- j) a/ Q- f* ~8 X
mcasp->regs->RGBLCTL = 0; // Reset RX
) ^% Y9 I) y4 y7 h( W0 B$ O mcasp->regs->XGBLCTL = 0; // Reset TX, G/ y/ D. ^- }' d& V% T
mcasp->regs->PWRDEMU = 1; // Free-running0 T6 E* Y3 a6 w. L
// configure McASP0 receive registers5 ^9 F: t5 w& C# i. `' o
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
. j$ w+ H2 N9 C7 _ {+ V: x1 R mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
* u$ [' i' g. X$ O mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word) ~4 B& G( D) B
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)# F5 n" |7 y' g6 _7 j4 F) N
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)2 _4 M4 n. y* g0 [& K
mcasp->regs->RTDM = 0x00000003; // Slots 0,1$ z, @# E9 B p% {7 v+ ]* _
mcasp->regs->RINTCTL = 0x00000000; // Not used/ w! a. i/ N" m+ L- ? r
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2567 g7 R% n# }% C- @- N
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used5 ^- F) \7 b8 t0 `- ~! I
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus3 E3 c# ^+ Z4 i; R* l. T* E% U0 i
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word; X) Z- W# q0 a
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16! l: |5 k. ?1 R* X: Q/ @$ c
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
& l8 k! Q) M/ f7 H8 l! \. d& ` mcasp->regs->XTDM = 0x00000003; // Slots 0,1
3 B: y' N! F" f mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit ?* I8 E* F1 n1 l2 k* z9 Z
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256* C3 A& N, U, N3 |9 }. Q9 F
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN. y+ q+ O' C: p
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT T& Y, I0 o" A) J( |6 X
mcasp->regs->PFUNC = 0; // All MCASPs
/ t9 T' Y) a a mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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5 V( Q/ [4 X2 [; n% F. y mcasp->regs->DITCTL = 0x00000000; // Not used
( g5 J7 @% G0 y; r8 h0 ^. u mcasp->regs->DLBCTL = 0x00000000; // Not used2 Z9 @; S% `) p7 }! L
mcasp->regs->AMUTE = 0x00000000; // Not used3 B1 i/ p+ z) W7 } s; a0 y5 w
" d7 R3 W; o$ g! ~: n& n/* Starting sections of the McASP*/
- d( Y5 @3 e- w4 T( m1 Q mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
0 Y7 J2 |' g J7 p& k while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); , H+ } D s/ u( i
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
4 N2 |# C8 K i: u; J( O5 N while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; & j# W8 J" j& b7 V# L8 N( j% b* [5 ^
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );) p, t+ s* v0 G; p) i
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; * t9 h, Y# o4 z2 x2 l% z
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff; ; M6 h* L+ d0 E. \# l, N& u
mcasp->regs->RSTAT = 0x0000ffff; ! U) m, f+ c( h- A8 G7 B/ K m
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
! a8 |* ?$ [3 _! Z* h2 ? while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );. K9 q4 M4 Q8 k6 c& t+ q/ `* [
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 5 i" {- e$ | x
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 */9 ]; E n" V6 l! w6 x$ B! x
mcasp->regs->XBUF5 = 0;
- z9 _; ~) Q& f! a, c" K5 Y6 v mcasp->regs->RBUF0 = 0;( i/ i, k7 f! U A& i" W1 Z2 F
# b% B5 ^& i$ v# S T+ j& r mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; " u. s7 q" c" H& @! U
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
& F9 ^& `4 x; z) p& Y mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
6 T+ }) U {& C) D( a6 L, L while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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/ f0 G; b$ A: k* H' Y0 j; _. @ mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; . D/ }5 l5 H6 ^9 _- _& G+ Y/ G( J" `
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );2 a) r! U2 s& ^# S/ e
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
4 a' |- j7 r5 P: v while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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: |+ Q1 d2 p. ` CSR = 0x0000;6 O/ d9 f5 O: o% h- T$ s' ~
INTC_INTMUX1 = 0x3d;
0 L" P: N7 S0 ?; ?) @0 C ISTP = (unsigned int)vectors;' v4 D, h" f& c+ t4 S( M
ICR = 0xFFF0; 9 x; k4 a; G$ z4 Z1 x; m
IER |= 0x12;
3 ]: e7 t; G: X) { CSR |= 0x01;
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+ r3 r9 e* E+ {还有就是两个输入输出函数:7 i$ A3 W1 d: c6 |; l
void output_sample(Int32 out_data)8 y; z0 y8 t* J% K
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AIC31_data.uint = out_data; s7 N3 n% A: y6 u: A' h
MCASP1_XBUF5_32BIT = AIC31_data.uint; R0 p8 d3 N$ }! G Z4 S1 I
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Int32 input_sample(void)
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* V" m( z5 ]0 P+ R- X8 L. H$ R+ V AIC31_data.uint = MCASP1_RBUF0_32BIT;
1 F! \2 V. q3 h A- X+ U! E return (AIC31_data.uint);8 \4 a6 E; D( |$ D5 h z
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