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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:
& V2 @& X# v4 |main文件:% S% {4 w5 {5 C+ N% V# D7 B1 {1 Y
interrupt void interrupt4(void) 5 C8 Z/ t R8 y2 Z. P' G
{
/ M# k# s6 m( ? |1 I Uint32 sample;
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& P j' R( p+ d3 a" ? sample = input_sample(); // read L + R samples from ADC( r$ {6 r6 t6 Y- W4 i: N7 `
output_sample(sample); // write L + R samples to DAC
8 c6 ?/ u: i8 J# r, [# t! w) P1 i return;
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p) Z2 Z6 l1 C4 X$ i& Eint main( void )
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; X2 e2 J' c1 x; R /* Initialize BSL */% Y' `- H# A! f; C2 r3 B$ p/ }! y
EVMC6747_init( );
/ V5 l- J. n: N /* Call evmc6747_intr function */% o. u! `- _; O8 y: Q
aic3106_init( );; Q8 K" ^: J) [5 M! n( ~" p' J
while(1);+ S- ~* s# R8 v! h4 |
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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
R! z E1 x' g& R& K' r! k, \/* Initialize MCASP1 */
0 \4 ]' F: c& N& C {6 v mcasp = &MCASP_MODULE_1;: W2 N! O( {3 B- u3 H
mcasp->regs->GBLCTL = 0; // Reset/ G/ ]0 j3 \# \4 f
mcasp->regs->RGBLCTL = 0; // Reset RX
# Z/ i5 j- b z8 T& [- W' } mcasp->regs->XGBLCTL = 0; // Reset TX
' Z3 v2 ~- f0 d5 O mcasp->regs->PWRDEMU = 1; // Free-running6 y2 A" R- Q, h; @
// configure McASP0 receive registers/ s+ m6 |1 }/ p
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used' n: d+ c, n" `& W6 D5 z: s" U
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus- d& [. ]! ?2 b. A
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
5 R! p+ R# a( ^$ C1 } e mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
, U6 l) ~& W4 L- b/ r! o0 B" G mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)3 |$ ]7 Y( p3 d
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
4 c& f9 p2 R- m2 b mcasp->regs->RINTCTL = 0x00000000; // Not used- Q, _0 X j# H% m
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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% x, l% i! L( J% S* ]% f mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
5 E8 b8 E V' ~5 G2 o mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus6 z U3 w& |& u% a9 O
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word5 P7 g2 @* v" W% j, i
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16. ^ u9 M& F+ n5 q3 b1 R
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
4 L( s3 m) Z$ n" ?7 a; b& V* e3 T) ?% h mcasp->regs->XTDM = 0x00000003; // Slots 0,1
6 ^3 O7 q" O" D0 k4 q# y mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit" |# g$ x& s# j: ]+ r' R
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2560 _6 {8 I) D) G2 J
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN/ Q! R& B- K! u
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
# |/ l. N |7 w" o3 `2 h9 A1 Z% \2 N4 n mcasp->regs->PFUNC = 0; // All MCASPs" q2 T# u# [' V2 u
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1% S. t, o+ w' ]7 [- g
' s) U8 E3 n+ C2 x1 [2 @ mcasp->regs->DITCTL = 0x00000000; // Not used) F- O! A; F$ C# O4 m+ [/ t7 s
mcasp->regs->DLBCTL = 0x00000000; // Not used0 P" _( i1 v) j% t* Q
mcasp->regs->AMUTE = 0x00000000; // Not used+ @1 V- }% T9 m. ^
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/* Starting sections of the McASP*/$ o& N, T) ~9 n" @' N: m0 E
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
7 P& X, E' e! l) `, v* m2 } while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); ' _$ k) k$ o0 f/ K0 u* G. Q ?
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
$ t W! Z H2 {2 N# P while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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2 K" f( A" z+ [' h mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; ( m" j+ N/ S/ N; r! r p
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
' x" n l; @6 \1 R% J- _* } mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
+ c3 C+ E; V' v# C) ~5 L+ l while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );; G. T. i9 a4 Z# M! P' w
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mcasp->regs->XSTAT = 0x0000ffff; - R! O( V. _; r5 E& X4 w3 L' G
mcasp->regs->RSTAT = 0x0000ffff;
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2 T: M7 G2 i/ I f mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
$ C$ a. [$ Z' M; A* @$ s% Q while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );1 T( S, e7 W6 ~( n1 I
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; & s$ k" z7 c) z2 I. U
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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/ {" h) ^ l1 ~1 a3 }1 P; Q+ k /* Write a 0, so that no underrun occurs after releasing the state machine */' @% ~2 K8 C( `; s+ K
mcasp->regs->XBUF5 = 0;
1 B( y! l+ i& m mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
6 ~8 z8 h. n, F$ H while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );8 R ~ L5 F2 z9 W$ J# T; w. q
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; 3 e, E2 N2 W% X" B9 y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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- n q$ [! X: n" l* x mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
, f# ]) _- k2 b5 Z while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
" |9 u/ z2 X5 L0 O' W! o6 v/ s mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; 5 D( ] U7 _) N
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );$ y$ _! P! r: u. S
3 i% }5 `2 M. @0 v, f" N' | CSR = 0x0000;
3 b& E. \; C" q0 S0 t INTC_INTMUX1 = 0x3d;. A q& b; b3 w, K
ISTP = (unsigned int)vectors;* H7 O/ [6 P& o# l9 R
ICR = 0xFFF0; f, b0 G1 i2 T$ H, {* ?- y% @7 q
IER |= 0x12; # d% n& U, J2 \3 J' \
CSR |= 0x01;
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/ n# A" e7 ^% V1 j9 @, N还有就是两个输入输出函数:6 x7 J. Y+ h: X
void output_sample(Int32 out_data)' P5 Q9 H3 u+ }% M: `9 h0 }
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AIC31_data.uint = out_data; : ^* N' B# `3 K- @
MCASP1_XBUF5_32BIT = AIC31_data.uint;* e1 t# ~9 V# j5 {6 Q g
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4 L0 g( e% R3 Q. uInt32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
6 o( u7 z4 C( y- o O return (AIC31_data.uint);
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