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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:8 Z! i& O5 l8 \' p3 i
main文件:6 `: q7 G& e% _( w" o
interrupt void interrupt4(void)
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Uint32 sample;. L1 ^4 \' `- }
4 U: U8 D( l9 m sample = input_sample(); // read L + R samples from ADC
! o5 ^# r: ?$ A( N8 g7 x. k0 @ output_sample(sample); // write L + R samples to DAC # m5 {5 P8 z8 r5 {# b: N, a
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9 `: e, A) h) K% ~9 rint main( void )
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/* Initialize BSL */
: I) A# M( x4 s EVMC6747_init( );6 q( u3 Z B0 x' m Q* R+ Z
/* Call evmc6747_intr function */
3 h% p) h9 T/ ^* m1 I5 ]5 ^ aic3106_init( );3 ?; |) J5 V* O0 W0 B. a* A" _8 e
while(1);
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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
4 _3 M* l0 i) ?9 F% [/* Initialize MCASP1 */
& m2 [$ G' G e H# Q' g mcasp = &MCASP_MODULE_1;/ }( w8 j6 K$ N6 [
mcasp->regs->GBLCTL = 0; // Reset
# Y4 q6 B' }6 @3 E3 }' E! Y mcasp->regs->RGBLCTL = 0; // Reset RX
: u+ f) W4 k2 V1 M/ f! p8 e mcasp->regs->XGBLCTL = 0; // Reset TX# P- I1 e- }" v4 r* ~* ?, C
mcasp->regs->PWRDEMU = 1; // Free-running' I2 c V$ C8 ]7 t- \+ S; _9 o
// configure McASP0 receive registers8 a8 Y% @8 d1 Y" x
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
! k7 Q/ ]- w/ ~; q3 o3 E, Z mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus! y) y1 P2 n; s$ ?; a
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
5 s. y) O7 x) `2 M mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
* N! Q. C) f5 y9 P mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
& m' Q E4 \3 e# @$ H mcasp->regs->RTDM = 0x00000003; // Slots 0,1) A7 x) `9 G" s; s6 n5 m) y
mcasp->regs->RINTCTL = 0x00000000; // Not used- }- Z' Q/ Q! @
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256# U' e$ t3 O% q3 F1 J
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
/ J! a2 r8 t: _8 I mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
+ G, P1 f+ W- i$ Z5 Z7 T- H8 u mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word4 j# ]- d& x( s" V; l. t. i5 e7 h
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-165 r7 c( L) ~% p. A7 J: @
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
1 ]9 s( C4 J( O; s! v m+ R mcasp->regs->XTDM = 0x00000003; // Slots 0,1
' ~0 |7 R; D7 b7 N: } mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
3 } m8 f1 u* V- N: J0 V1 V4 ?# g mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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# K+ c/ J' P1 k$ m mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN) V2 s& m- y7 E! C) @3 T
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
9 K; B4 _, ?" O+ @ mcasp->regs->PFUNC = 0; // All MCASPs8 _3 g! R8 o. Q1 _0 ?0 i% O
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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+ g' D2 c3 ^- Y( ~ mcasp->regs->DITCTL = 0x00000000; // Not used2 i- P- M( O A* [$ p. t( H
mcasp->regs->DLBCTL = 0x00000000; // Not used3 Q. o& ?8 U/ t/ T% }9 p
mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
1 A& J- _) ^+ G: k! B mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; ( e. z4 Z) ~/ o0 O0 h2 F
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); T& Z8 D0 W+ [0 p( q
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
+ {1 b5 L- C3 T+ y! b. ?0 T3 k+ | while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
1 u& L% k9 B% O1 w while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
4 Y: Z4 ~- V; S$ ? mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 3 \, j4 ?& ^/ D9 Z R% O/ n- Q6 d7 j
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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6 J. Q& c" i! v, p$ c% ^ mcasp->regs->XSTAT = 0x0000ffff; 3 N' ?+ F5 R# v4 T- t7 e0 B' F
mcasp->regs->RSTAT = 0x0000ffff; 2 V4 @% h( e" z* k& Z
1 A" b9 f; d0 S. q6 h/ F mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;/ ^ Q/ K9 X+ n9 |7 ]& M
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );0 z h2 }. ^0 s( y5 w: g% p
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; # f0 t7 l% ^2 S' \' J1 {' u$ D
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );, K2 w A/ ], v2 r3 m2 z% k
, v0 a! ?0 o+ \7 G; r% ` /* Write a 0, so that no underrun occurs after releasing the state machine *// H4 x5 q5 n5 Q6 o, \! M- o
mcasp->regs->XBUF5 = 0;. H1 Q( X0 `1 X5 I
mcasp->regs->RBUF0 = 0;) d' S/ ?& F" V" i3 g. `0 ?$ I
: k1 C1 z! l1 L% B. N mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
0 `4 Q: C: z: Q4 d5 |: H4 T while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );2 M5 w( ]0 `. G Z% x
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
2 A/ J8 B$ m$ k" y1 }) ]* A( D G2 i: ^& l( Z while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );& |! e. P: v& f! O9 p8 A8 o
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 9 T S0 x' [# ]" k& n
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
% r0 H; h L$ e9 T3 r mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; : j" e# H. S/ ^8 ]+ M8 f# d7 O
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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2 F+ M u$ S. p% o CSR = 0x0000;3 Q, R* g& Y3 H) O# T. K
INTC_INTMUX1 = 0x3d;, @. L R" I- k. T, i& L, @( `& g
ISTP = (unsigned int)vectors;
+ u* m f( C4 i; D% C; L ICR = 0xFFF0;
w y$ ]7 Q9 @; O; J1 @ IER |= 0x12;
* _% G( q/ T. G0 _% ?) j6 o# P CSR |= 0x01;
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+ `, r5 x& r a z8 M" a还有就是两个输入输出函数:
- k5 _& l* H; B4 z% }0 i5 |void output_sample(Int32 out_data)2 g. E" w j+ E) G5 `
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AIC31_data.uint = out_data;
& f* k% c9 [2 M$ ?7 d MCASP1_XBUF5_32BIT = AIC31_data.uint;! }0 G! R8 H3 E2 h
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Int32 input_sample(void)
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! O9 K+ a: k) H( G' P AIC31_data.uint = MCASP1_RBUF0_32BIT;
0 r% n# O' `3 Q, k' B return (AIC31_data.uint);7 f1 ] [5 n6 _. x1 w
}
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