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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:6 Q5 H# H" N) \$ a, Q
main文件:
7 \5 g5 c+ W& O) ?interrupt void interrupt4(void) ' d- t( m! ]! ] ^, ]0 A0 f& }
{
: }) h( S7 g% p( g/ A& s* p+ _ Uint32 sample;. X. a0 m$ g' A$ @
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sample = input_sample(); // read L + R samples from ADC
# C$ O: Q! J# [5 o" j! l) i output_sample(sample); // write L + R samples to DAC 5 j4 p' e! C0 P! {3 I0 F' y& O
return;
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1 Q Q( a4 w d4 i9 s! I3 Pint main( void )
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/* Initialize BSL */
- {1 X" W% X, ~" L, M EVMC6747_init( );& x4 }* _- _' U3 g
/* Call evmc6747_intr function */
. H! s8 d2 l# k' C$ } aic3106_init( );
u( H/ e& R' q* E% z7 B) p 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- z" ]2 X" U# i' J+ n" { O
/* Initialize MCASP1 */
' s- `% U( M" v% ^, _4 L mcasp = &MCASP_MODULE_1;* A5 t6 s3 y: _. j5 Z
mcasp->regs->GBLCTL = 0; // Reset
; s" B& S$ Z) w: U mcasp->regs->RGBLCTL = 0; // Reset RX
& r) a: {+ ]1 d4 v mcasp->regs->XGBLCTL = 0; // Reset TX/ g+ G' c: R7 v% ?
mcasp->regs->PWRDEMU = 1; // Free-running; v* q3 Z0 N/ {& S8 q
// configure McASP0 receive registers: ~2 H8 Y# o$ A8 y' m' S
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
. b5 Z% a2 M% o8 S# s mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
: C7 ~ U6 J0 y7 @ mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word2 h# y9 f& P8 K; C
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)0 P- j3 n& x) r) U0 Q: U z
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
7 a$ a2 O8 u% l mcasp->regs->RTDM = 0x00000003; // Slots 0,1
; r; o$ p' K" r3 ` mcasp->regs->RINTCTL = 0x00000000; // Not used. O! w( }# v3 ^' Q9 z
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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* f% Y( V; o G mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used- z( m/ M: w4 D+ l5 \7 A2 i. @
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
7 ~9 X7 Y1 o3 K* y3 z2 i3 Z mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
8 N0 `; m$ f% Z- k* c mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16' k3 \2 u; h* ]0 l. x3 u; I0 E
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
: _1 J y# ^4 A mcasp->regs->XTDM = 0x00000003; // Slots 0,1& l/ p2 l7 s9 ?" ?8 K( d/ h
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit( B& i; T, Z: Z
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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5 N# T/ z9 \4 I5 `* m- O" h mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
: u+ r+ u9 X1 R3 O: G/ C( l mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
' @; s+ s I/ ]% W mcasp->regs->PFUNC = 0; // All MCASPs- z0 n8 W7 G) Y9 F+ u% x
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1! e2 m2 x( @8 A
& w5 ~4 y( p5 r mcasp->regs->DITCTL = 0x00000000; // Not used8 ^2 f- R L" v* j$ {
mcasp->regs->DLBCTL = 0x00000000; // Not used6 R( r3 j1 d* s/ B
mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/3 N$ t1 u; } K$ i$ m b6 |* v" I
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
, j. l- E7 p( N9 A) o: a: S$ I) o& _ while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
' s E: f* e! @: b& W7 k" j5 Q mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
+ X1 X" ]" Y# h3 ]; R while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
& t' `) U; V% j6 Q, Q2 H
4 {" [1 d. r( n+ o4 Y I1 M mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
' C2 z5 `" h% _ while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
6 ~1 L" e F( g* b4 N! h mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
; a7 D1 [8 `1 H# @ while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );7 `: M8 c2 k k! x" e0 f
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mcasp->regs->XSTAT = 0x0000ffff;
2 u4 D; V M% |7 X8 G; A+ K7 Z mcasp->regs->RSTAT = 0x0000ffff; # t4 A6 S" ^3 b5 N
- \0 A: ?, \6 s! Z; ^- h mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
8 A( z* V" }6 ?; j" i. T; S0 h while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );' Z/ z8 g) i% N# E6 d
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; : j' [! ^1 n: S
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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, ?6 L1 z( U: B5 \3 w /* Write a 0, so that no underrun occurs after releasing the state machine */
7 D, ]# O% m+ ^( k mcasp->regs->XBUF5 = 0;
: C2 W6 R& e! ]. _" ` mcasp->regs->RBUF0 = 0;9 k/ p' }# b; K! K3 ^; w% W
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; ) W. i8 y4 \! o+ G
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );+ H& p# Y* C% e
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
4 ~3 u0 w7 [% G: f while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; ! X! [! Z, g. x. ^
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
$ C. o% Q4 r* I0 |: _ mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
& n) M5 z% L0 i4 i5 \5 r while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );$ ~+ B8 w4 U# \% B
8 K5 Q/ j4 f9 b, j: v' O CSR = 0x0000;
% D; Y. T( M- P6 V3 @ INTC_INTMUX1 = 0x3d;
; W( I. a# E& b0 I6 e3 a2 w ISTP = (unsigned int)vectors;- J4 n. Z1 f t+ S
ICR = 0xFFF0; 0 b, @) H" F7 D; i3 F( k2 T! D
IER |= 0x12; : h! b! t7 u" u$ G
CSR |= 0x01; ( C# j8 ^. t; X, h8 d6 s
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还有就是两个输入输出函数:
2 g4 H0 S7 X6 O, Uvoid output_sample(Int32 out_data)" f/ K0 r+ F) T( D
{
8 K5 C- d9 S m+ C C' c AIC31_data.uint = out_data; / d* ]9 l ~+ F6 J6 n
MCASP1_XBUF5_32BIT = AIC31_data.uint;0 Z7 v% y! ~/ b% F g, A8 ?
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1 p3 }# n1 T' g; p$ DInt32 input_sample(void)
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5 b5 F% C, h% P4 N; q4 \* k AIC31_data.uint = MCASP1_RBUF0_32BIT;
0 q u3 [+ y/ H2 I# ]: \ return (AIC31_data.uint);" f& T% k6 [: S! C
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