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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:. D$ y# j6 f! N0 v
main文件:& u1 u0 y, p: f
interrupt void interrupt4(void)
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+ U2 T; g$ f9 s Uint32 sample;
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+ v9 [2 O! W M sample = input_sample(); // read L + R samples from ADC+ \& V( j9 k+ J$ x3 a! ~6 M" U
output_sample(sample); // write L + R samples to DAC
8 N; z+ F- }/ _' K0 {) U8 } return;
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O, t: m; ~/ g* b" q6 Mint main( void )
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/* Initialize BSL */
) A. W- q# V% M7 A" P4 Q/ T) ~# | EVMC6747_init( );
o- O3 R6 f' K5 `2 H' Y" B /* Call evmc6747_intr function */) o5 z2 q1 Y. |) G
aic3106_init( );7 S$ A8 I6 w; K6 q
while(1);/ w2 M* a# V" e9 z: O' u
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% h( u: F; K0 F% p2 U$ @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 v% U5 p6 u u( e0 c
/* Initialize MCASP1 */
! A# Y5 P2 S: q; d, S. ]: U: ]: z& ~$ I mcasp = &MCASP_MODULE_1;
+ @" e4 [$ @/ z3 u+ k6 F" B) u, z mcasp->regs->GBLCTL = 0; // Reset
, o: N* v1 Z$ m9 ~ A" d9 | mcasp->regs->RGBLCTL = 0; // Reset RX
6 y3 n; z! K% ?1 n mcasp->regs->XGBLCTL = 0; // Reset TX
G4 t- } B+ G: S- M- W mcasp->regs->PWRDEMU = 1; // Free-running/ V( ]" z7 p! z" l/ O3 x4 ~
// configure McASP0 receive registers
& h3 V- y( E$ o4 R# l mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
$ f4 d9 o6 U7 e3 O0 Z% | mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
1 V, o$ W7 p- f& O( G mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
% O0 f8 g/ w- y9 x: K- u6 [" c mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side), o) C! i% y! ?) z- k
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)! V; D/ _1 x+ Z. z# D/ U% V( V
mcasp->regs->RTDM = 0x00000003; // Slots 0,1! p: M2 A9 X" c* V# l& F
mcasp->regs->RINTCTL = 0x00000000; // Not used% S- { _) ]2 L. q) a, m7 }0 `
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used6 I+ o8 ~ Z9 b* J# U; R
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
$ G3 t6 k- f! H6 A mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
( u9 f/ K9 f. z0 w! e$ p mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16, o1 F8 R; z" D3 j9 c
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK! C# u2 ]- a. d, P E& r
mcasp->regs->XTDM = 0x00000003; // Slots 0,15 u9 A- x/ K5 A9 }
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
7 |9 Y' H& {3 j: ~2 ^6 G mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN2 U V+ R9 G. u8 E }- c3 G0 j" Y
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT% r7 a0 P8 ~# O( h9 `
mcasp->regs->PFUNC = 0; // All MCASPs0 N" H P" F: _0 S3 B# O4 z
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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% c8 A5 U/ z O. q mcasp->regs->DITCTL = 0x00000000; // Not used
5 {4 o* N7 L+ h mcasp->regs->DLBCTL = 0x00000000; // Not used
u- q* o6 K v6 S4 h mcasp->regs->AMUTE = 0x00000000; // Not used
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( W6 R5 r3 p$ i& v' A+ C/* Starting sections of the McASP*/
& }& ^! X7 P8 } l( D) I mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
! c' D. T5 s' u2 | while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
4 Z) }* f* B4 I! F mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; ! g1 v. U, W% @5 y$ s; v" v2 V9 [
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 2 m3 s$ n( y, n. ^4 g5 u
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON ); _: {& @9 Q4 n, R1 L/ c( m! u* g
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
7 {' h/ Q2 O) Q$ g while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );( H, p2 _2 {, L, \* ~
# }; E0 @& L- }7 V' U* ?. I* @% G8 { mcasp->regs->XSTAT = 0x0000ffff; / q2 B) R+ A" g3 m
mcasp->regs->RSTAT = 0x0000ffff; ! X" R% t& Z, m# k$ F+ |: D, \, V( s
o- K+ o9 N& X- |9 S mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;5 }8 E4 R# X5 z5 D
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
3 W7 E8 l+ ]" M9 X' h$ S mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
" H- d5 w+ c8 F% z1 j while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );/ P* }3 T- m4 I1 Y
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/* Write a 0, so that no underrun occurs after releasing the state machine */0 S* @& N0 ~: Z' Y$ P" c
mcasp->regs->XBUF5 = 0;/ T# L1 b! e- |. ^/ \; I
mcasp->regs->RBUF0 = 0;
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6 U' F* G- o' N) \1 {5 _6 Y mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; : J( |' v( S4 t$ ]+ b
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
4 i6 Q5 y1 K* p$ O- y" J5 J4 n. l0 D# e mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; ! B! U0 P% S3 H5 ~/ G8 g
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );7 ~4 C' Z) v& ?
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; ) h# T# S8 j6 O& y4 H, d
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );& a7 r" E8 X( W' w
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
4 n3 k0 D1 |' Q* a2 L while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );* [! o: O- i, H
/ b* v1 [, `# p h2 |4 x CSR = 0x0000;
9 A: s/ [$ X0 P. }% n INTC_INTMUX1 = 0x3d;
+ p( F. V* H. L( O& L* P ISTP = (unsigned int)vectors;. h# A6 |" f# {: l9 e: |
ICR = 0xFFF0;
. R& X. w& @3 {; q IER |= 0x12; 4 I- Q' d5 k+ f- y
CSR |= 0x01; ) m, @' |+ |$ o8 D5 t$ p4 D& u( G9 S
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}: r" R: V6 k$ L还有就是两个输入输出函数:4 M" ]1 x1 T1 N3 g7 E
void output_sample(Int32 out_data)
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0 X5 c7 \ W$ T8 L7 K, R% ?8 F AIC31_data.uint = out_data;
/ v5 P8 \1 p( k' H- E8 |1 [ MCASP1_XBUF5_32BIT = AIC31_data.uint; u$ |7 ?: |4 C, Z$ c1 B
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2 K6 ~" X7 Q6 YInt32 input_sample(void)/ N, J' V/ e4 U2 L& J( }) j
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
3 {, f P* P/ k) x3 \ return (AIC31_data.uint);
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