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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:
0 b( v# \- Z- wmain文件:
( e; y6 F. c3 h; D. j) d" m* Jinterrupt void interrupt4(void)
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC; t8 z+ \" h. ^; O( p4 r2 d
output_sample(sample); // write L + R samples to DAC
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}
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int main( void )
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/* Initialize BSL */" }1 R' K, `* ?( Y6 q
EVMC6747_init( );
9 p$ D7 t$ R. a; H; ~7 Q8 w /* Call evmc6747_intr function */+ K, z) C+ K0 ~
aic3106_init( );
! i5 M9 ]. D- p0 j, ?2 ]9 l6 M while(1);4 a: j& N0 k5 |1 S* a
}
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" ^8 L1 M4 D, \9 S. Y2 ?( Eaic3106_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8 J' }; v5 Y, c' y8 ?. r6 N% m
/* Initialize MCASP1 */5 b. v5 q: |+ d# K0 Y1 R$ y
mcasp = &MCASP_MODULE_1;1 Q, m3 W/ z' j1 `7 C
mcasp->regs->GBLCTL = 0; // Reset
$ y8 E d2 d$ t4 G# h mcasp->regs->RGBLCTL = 0; // Reset RX
1 E. r7 O9 d; j7 A mcasp->regs->XGBLCTL = 0; // Reset TX
! g! U+ `/ ]/ E mcasp->regs->PWRDEMU = 1; // Free-running# U" x3 ?. U/ r; c! i
// configure McASP0 receive registers0 W5 L! H5 s# t) ?8 @, ~
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used) O2 K1 X: ~8 |8 T; l" }0 l. f, k0 e
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
/ Q3 D" b, p9 J8 i5 e mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
( z+ N" ]( C) y; i mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)1 J. Z6 e- h& Z4 o) a4 X
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
0 @7 j( D+ W. e9 G# s& ?- j mcasp->regs->RTDM = 0x00000003; // Slots 0,15 \5 j. ~& a# `. ?) S0 u7 A+ E
mcasp->regs->RINTCTL = 0x00000000; // Not used% f% n( m+ |4 U) l
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256/ d4 A; V7 y( M& s. l8 }: S {9 V
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
+ C% T$ L; N# H mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
, Z" K# Q( G- E5 r1 [" Y+ x U mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
7 u) H* d; s/ p: R% O# `' u& h# f mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
6 I& e( {( U1 u; w/ n+ s6 u& N- L mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK# j9 ?. f$ u* ?7 }
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
' X! k7 @: S2 W, P# a3 i mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
& A, e, W- j, v+ P mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256- s* Y, ]. g5 p6 x' w
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN: r: }# A3 {' @0 A' S2 r) m5 D
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT+ ?, N- U, C/ ?4 R9 i: r
mcasp->regs->PFUNC = 0; // All MCASPs
, D1 e' N/ L9 a3 k) Z mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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2 Q! c) u0 q2 S# l) v7 I S! \$ r mcasp->regs->DITCTL = 0x00000000; // Not used
& G; p8 Y$ l* S' ` mcasp->regs->DLBCTL = 0x00000000; // Not used# ~9 A- S4 e# w4 r6 n( N: ^5 H
mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
/ s8 {( V9 w6 e; O mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; " D. A0 O$ P$ D, R
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
# x. x' W6 t, K6 _7 G3 y4 @1 P mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; ) w) s1 X; I) k
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
. Y2 d- Y3 m2 u5 H6 W) ~' I while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
; x2 H4 \) P0 W R) i mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
' M7 q$ h. }. U- ]; J! u0 ~5 h while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );3 F0 [' ]: u" S' ]8 n
8 x' I: Z6 E% q7 I5 ~ T; K mcasp->regs->XSTAT = 0x0000ffff; / d# O4 H$ h9 Z' q3 H& g
mcasp->regs->RSTAT = 0x0000ffff; : _% Z& i8 s. M m. `4 u5 h, z
0 F D% p* x# _# G: ?) x9 J mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;# O% ~! z5 q0 I
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );9 T3 {* S X# M
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
) \; l& T0 @7 k7 R y4 K$ m while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );# z5 t4 s" l* L r2 g3 i
% E- o, I Q$ }' a /* Write a 0, so that no underrun occurs after releasing the state machine */7 x& B- y, }) J; I" W5 i
mcasp->regs->XBUF5 = 0;
, S$ v, b" S. `0 O" j mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; ; o0 T0 {2 x: V$ T' Y
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );7 m# q% L: e. s3 Q2 M4 O
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
4 x3 w5 n7 s( z while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );& ^7 F" s3 H, r6 M5 @
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; / X% d `8 g: e( b$ @5 G
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );/ y5 h/ q* u! t+ J0 ~
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; ! y b6 K. V$ }1 l
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
* w& U5 h6 o- [- y1 P9 q INTC_INTMUX1 = 0x3d;( z) L) `1 g b
ISTP = (unsigned int)vectors;
* b! s: R/ s V& J ICR = 0xFFF0;
/ p0 l3 O6 l, l. Q IER |= 0x12; + L& {% H8 n: z% z( K
CSR |= 0x01;
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还有就是两个输入输出函数:6 ?2 S- I9 t* m, \
void output_sample(Int32 out_data)5 W4 l4 e# g' V2 L" l
{
/ t7 o- U9 ?5 N AIC31_data.uint = out_data;
C5 K8 l# `5 I* A MCASP1_XBUF5_32BIT = AIC31_data.uint;
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Int32 input_sample(void)
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5 h* y+ F$ n0 V" [ AIC31_data.uint = MCASP1_RBUF0_32BIT;2 s! ^$ W* F0 L1 ?; c
return (AIC31_data.uint);
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