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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:
% y+ T% m! B) l( Bmain文件:( y |* P g& H5 X7 R, B8 W
interrupt void interrupt4(void)
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Uint32 sample;& b: _) ~% m( Q/ b$ N4 L' F5 h
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sample = input_sample(); // read L + R samples from ADC
1 `! Y# A# I+ a' T$ t1 t output_sample(sample); // write L + R samples to DAC ( F$ y) h+ m( m, L8 |3 f: _# m
return;
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& y1 n7 n' r! M/ e' ^3 gint main( void )7 q9 L5 u H2 r0 |7 k1 @
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8 }! M$ s5 G( N( k; x) {8 y& ]+ w /* Initialize BSL */7 ?8 m4 x3 ] z2 Y( S0 a2 f
EVMC6747_init( );
& R+ {" \* q2 v3 `5 H" ^ /* Call evmc6747_intr function */# u' n, @1 y0 |% n
aic3106_init( );
* g- x" I1 r5 X$ K9 \) Z 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
: \1 N' v) v! F3 ~* I1 _/* Initialize MCASP1 *// {* X! I+ I' C% Z3 c
mcasp = &MCASP_MODULE_1;8 K: V9 h" @3 j5 p$ I7 V3 q2 O
mcasp->regs->GBLCTL = 0; // Reset! m& t5 i; \6 _; R8 x' b! H1 r
mcasp->regs->RGBLCTL = 0; // Reset RX6 m/ B' M: u! I% n) ]
mcasp->regs->XGBLCTL = 0; // Reset TX
s4 C2 ~- C0 y2 q, \1 `& o* Q( Q7 n mcasp->regs->PWRDEMU = 1; // Free-running
4 _% n9 E* `9 x3 i; f // configure McASP0 receive registers
8 C& p- u5 G* @0 T$ H: i: V mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used" ?% E3 h3 v" {, u9 v: V. ^, d
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus( c% \$ U S" M- _( k+ @
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
% p ^" y$ A, t mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
9 O/ r8 l) c% O2 g4 B$ i/ c: v mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
$ H5 ^1 g: s2 [1 Q0 c mcasp->regs->RTDM = 0x00000003; // Slots 0,1, G$ T0 X* M9 J7 ~. A3 ]% c
mcasp->regs->RINTCTL = 0x00000000; // Not used; @- @& K( s& T4 z/ j/ N3 C7 |$ Y/ J9 M
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
( Q' B! @# s- ^; ~7 r- d" c mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
. L, q4 `) I$ }9 B: e9 A mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
/ X4 C7 u! ^+ M( c" e3 q v mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
' Z! i( T+ j, U) q% a5 E mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK3 q) j. G5 w& t' `% d" V3 S
mcasp->regs->XTDM = 0x00000003; // Slots 0,10 w2 ?( ^% U. \6 z1 d+ M
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
0 M- A( [7 I1 ]- t( m mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256# g2 B0 I7 M- ~/ J6 j# ^( F7 L
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
* L0 C# l; g! N, U1 q, o" v$ A mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT# B2 a( \0 {# i" B1 ] V }
mcasp->regs->PFUNC = 0; // All MCASPs
7 |4 r" H V' \$ K mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1* [) B2 y: \" V# C- }; y
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mcasp->regs->DITCTL = 0x00000000; // Not used
7 u" S/ r, ?+ I# U0 A1 A mcasp->regs->DLBCTL = 0x00000000; // Not used) B: V- y' B% Y D
mcasp->regs->AMUTE = 0x00000000; // Not used, M# P* Y3 B6 [
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/* Starting sections of the McASP*/
. u. Q; t- @$ p4 U mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
2 h2 h+ D& o" M' q% g while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); * x0 P( v0 N! `$ ~- \
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; % b: H' u& b+ c! R8 _. z, t
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );* D0 \' |; d1 b+ G3 x
2 {5 E& \' H# A8 |2 L- s% W2 I mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; ; X9 g$ }; L- I) R4 O7 y: f
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );# w, U4 ]$ o( J1 I
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 8 ~$ Q' B8 ~3 x6 X2 w
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );2 q: P9 N4 W- o7 G0 L1 Y h
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mcasp->regs->XSTAT = 0x0000ffff;
x# F; f6 @+ M2 Y0 {, t6 i' r( @ mcasp->regs->RSTAT = 0x0000ffff;
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5 a! L& T: |; ^5 x5 ^+ v mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
7 t: M- ^- R2 f! f while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
; B' ]* z+ _! H {' T mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
- [4 n8 `% E0 \9 h L while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );) s8 r0 N! W" b' Z( ^7 {
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/* Write a 0, so that no underrun occurs after releasing the state machine */
2 r8 N) m7 L- E8 R mcasp->regs->XBUF5 = 0;' @/ ]* I% c: m( i5 F6 L
mcasp->regs->RBUF0 = 0;# F/ H+ n* Z1 `$ P7 j
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
! d$ n$ @" G1 f6 \( X while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
" g% W) Y- ~* a, d/ H mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; 3 t1 s* \! ?' k
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
. M$ A [! {! o) I" T- ] while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
/ h( T8 j# ~: M0 C mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; & A$ _2 s1 a- f7 e
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;9 g u8 f- ?. ~8 u/ J6 X
INTC_INTMUX1 = 0x3d;, C2 f! P6 b$ t% O% o
ISTP = (unsigned int)vectors;' P$ ^+ p7 n0 U5 p$ w m1 |
ICR = 0xFFF0; , o2 l5 t4 x4 C, A
IER |= 0x12; 2 j8 D0 Y2 D8 d# U
CSR |= 0x01;
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还有就是两个输入输出函数:$ F$ A O: E/ G: J1 J
void output_sample(Int32 out_data)
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AIC31_data.uint = out_data; / k P+ w2 ^5 N$ b4 X
MCASP1_XBUF5_32BIT = AIC31_data.uint;+ N$ ~: d, @# ~7 a; L2 \! \
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! E3 F2 n( e' I: Q7 @Int32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;! U1 |8 W- c' V
return (AIC31_data.uint);- E/ C& w, q) C
}
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