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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:( ` a" M3 t) H' H; Z
main文件:: `. ^0 y8 W$ Y4 A
interrupt void interrupt4(void) & G9 L. Q7 m# B w
{
. `. _$ f, i q3 L3 V4 a2 b$ i Uint32 sample;2 a8 N f7 l. @' u
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sample = input_sample(); // read L + R samples from ADC' U4 m. g) `$ O) f& \
output_sample(sample); // write L + R samples to DAC
! b) o( Q) P6 O4 x4 t9 O return;
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int main( void )
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/* Initialize BSL */2 a" n2 |, P+ F: @$ w. h
EVMC6747_init( );! k2 h2 H: d' T9 e M: I
/* Call evmc6747_intr function */
+ x' |+ P: z6 f1 `, a, m8 t aic3106_init( );! N" U6 W3 v$ w8 O: _+ W; W ]
while(1);# p) R2 t% ]! x( f( ]
}
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# N$ P+ K) \2 I. ]9 v* Qaic3106_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
* K9 _1 r- [. W7 A `) V1 @/* Initialize MCASP1 */2 S# b/ F5 U' h6 Y
mcasp = &MCASP_MODULE_1;
2 ?2 i" m: X8 T: V mcasp->regs->GBLCTL = 0; // Reset8 W1 [6 N0 r2 S8 H7 v$ K
mcasp->regs->RGBLCTL = 0; // Reset RX
' _* M g# q- r5 \ mcasp->regs->XGBLCTL = 0; // Reset TX8 p, W6 |! p) d" l
mcasp->regs->PWRDEMU = 1; // Free-running
8 ^! \# a9 o5 C" _ O // configure McASP0 receive registers/ Z1 F9 [$ C0 I1 o$ C1 ~( `- ^, r0 g
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used( _* t. q) F8 i3 ]* t
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus9 P$ f" D! t1 h
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
. H3 K: g& t0 A5 M mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)6 x8 F0 i, ]% E' \
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
; o$ r5 X* s1 P4 `9 O mcasp->regs->RTDM = 0x00000003; // Slots 0,1
; i/ m; K4 }- o mcasp->regs->RINTCTL = 0x00000000; // Not used
6 s: A4 _ U7 z. t0 i mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256' G/ O) M1 D3 M7 ~
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used3 c( x) Z, w! d, T$ n
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
! g! J! N9 e) k! d/ ~$ e6 p& | mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
1 ~+ N, F/ Q# r. f2 l( ]2 h4 _! R mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16" z! o* k2 g% f9 O
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK H. t0 O3 e5 Z6 j, ?2 h) o
mcasp->regs->XTDM = 0x00000003; // Slots 0,15 ]1 |. u) g' L0 Q% F' R" _
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit9 G- K, S% h, T$ [) c
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
) [8 F/ d/ y) j/ o+ }& _* ~ mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT9 s. E5 P, ]3 m
mcasp->regs->PFUNC = 0; // All MCASPs
K1 ?( p. ]& A) r# G mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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' [- U8 O% a9 u% @ mcasp->regs->DITCTL = 0x00000000; // Not used% q* L ~" R! n; B# `8 C" P4 o+ _
mcasp->regs->DLBCTL = 0x00000000; // Not used
9 P3 {2 {. v! Y" {" V+ [. Q) ] mcasp->regs->AMUTE = 0x00000000; // Not used
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U, r. R, j) G. y4 v4 O/* Starting sections of the McASP*/8 r6 o2 b% P9 S4 ^1 W
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; + f/ @; ]5 d! h
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
# d8 g) Q9 @( y9 i! @" X mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
; ~" R0 | i3 f& R while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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6 e) I& f$ Z4 E/ s, w& w mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
$ H2 O4 F3 A6 ~; o$ M while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
0 J) W9 J6 l; _; ~! F mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 0 B. U$ R' A7 g
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff;
( l# m8 p/ X. p& k8 ^ mcasp->regs->RSTAT = 0x0000ffff; / j) U4 S3 j6 C
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;4 c" L, X4 j1 H1 w" D/ r6 O
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );3 n+ ]8 z& H# r6 j, p
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
: Z8 ^& x( q8 v0 `( c$ M while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );4 r: j+ z' L: J
# t5 \9 P& E7 d! h' Q' ?' M /* Write a 0, so that no underrun occurs after releasing the state machine */
8 u0 \9 _& ?+ ~7 f" P mcasp->regs->XBUF5 = 0;
$ g8 B/ L2 y. q5 w% o, Y" j( \4 x mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; ; a" w/ N9 @& V' j6 `
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
1 {, k! a5 }: d2 @+ Q- T: p mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
; d" f% _" D" K& ], h, u while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );; T3 `" @3 f) s( w3 T: N' k
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; ; c2 z( a! F0 _! X: w$ d
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );( f0 Z- `% o& i5 y
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; + w3 Q+ x8 N- t! m( F
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );! x3 w% h0 \0 B- {4 }/ X* X- U5 n
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CSR = 0x0000;
G4 d2 G5 `2 ^# R$ y* Y INTC_INTMUX1 = 0x3d;/ g! f. r8 A$ X
ISTP = (unsigned int)vectors;
6 g, k$ N) z. v k2 B. Q ICR = 0xFFF0;
& }6 _1 ], o+ U2 | IER |= 0x12; ) M3 O! w# H& z
CSR |= 0x01;
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8 x1 a7 f' {3 d+ I# A4 V还有就是两个输入输出函数:
9 [5 A8 ?3 \) b& X! q8 Kvoid output_sample(Int32 out_data)
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AIC31_data.uint = out_data;
3 H5 h1 m; @, H9 f- C0 }8 E MCASP1_XBUF5_32BIT = AIC31_data.uint;
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- O; b, l7 T$ g5 k8 T YInt32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
: g, K- _4 L4 H' m; g! y return (AIC31_data.uint);6 b/ h2 v, P( q, S& J4 I3 Z2 B1 V
}! J# O( n2 ~" z N% `
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