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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:
7 l# U3 L |5 w; \/ E1 Jmain文件:
, W8 f o& [4 \6 k5 E8 Minterrupt void interrupt4(void)
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8 K+ x9 B9 n+ V9 t& a0 N Uint32 sample;7 q4 s- B9 C8 D2 }) q
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sample = input_sample(); // read L + R samples from ADC
1 m- o& r* z( P output_sample(sample); // write L + R samples to DAC
8 @9 m3 X0 L, V" w. J4 _ return;
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3 h$ B- C7 B. d9 U; fint main( void )
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2 j% M+ U& C( n9 ?6 L) O /* Initialize BSL */
, O9 R6 S7 S& L: D) Z EVMC6747_init( );
0 K5 q8 d* S- b5 ?# n _ /* Call evmc6747_intr function */- n K4 {/ b4 f# a& ^
aic3106_init( );# X& I; y; L& T3 G8 j
while(1);/ H* y/ ?# P+ z( k* n8 o
}
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' `% f6 }6 x! O: ~
9 Y$ d* P% U. v' E4 t0 |' Raic3106_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 e9 u% W! y* m. _9 r
/* Initialize MCASP1 */& R) o l* L9 q) z0 T( |
mcasp = &MCASP_MODULE_1;, e( n; s$ c# `) x$ `2 i+ _
mcasp->regs->GBLCTL = 0; // Reset
& L% x- `/ j7 V# Y4 M mcasp->regs->RGBLCTL = 0; // Reset RX
# P$ {! E0 B5 `' M5 ]! I# W" { mcasp->regs->XGBLCTL = 0; // Reset TX" g% E+ f! p6 v) E. s+ S7 S1 R6 d
mcasp->regs->PWRDEMU = 1; // Free-running
2 ?, F/ j5 q4 h8 u+ c) } // configure McASP0 receive registers1 u$ Q# j( }& ?- M
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used3 o$ I% ^/ D; R" f2 l4 J7 a
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
' |* M% _% t3 G/ |- u mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
( n) V' \; D$ E mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)/ t( P& o! R' t% F. {/ l
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
# _; }8 V' Z2 J) y mcasp->regs->RTDM = 0x00000003; // Slots 0,1
- R+ s9 _2 F a1 [- {# |5 {1 q mcasp->regs->RINTCTL = 0x00000000; // Not used
9 e+ L6 s+ U0 ^* ^ mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used6 Y4 Q. n! X' o ~3 `6 ]
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus: m& F3 F/ b0 C7 U0 S7 y
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word& } P" `* F8 q: |; {8 P
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16* U3 @$ R/ z6 U4 N+ W. } u
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
3 H/ o( W( d: k! c- X, V. f, d mcasp->regs->XTDM = 0x00000003; // Slots 0,11 G1 l. v- s6 F, }; {& |
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
( a8 c% O' R. Y7 L7 Y5 D/ z mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
) ?4 R0 I: {! ~* |
) I& P/ s6 p" m3 J3 @/ P5 k1 R mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
2 s5 ~( U0 u4 p mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
) H: \& l. \2 W5 P1 X mcasp->regs->PFUNC = 0; // All MCASPs7 D1 A4 h$ W6 h, D3 z" L
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX13 j* T8 p2 [) \$ o& j
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mcasp->regs->DITCTL = 0x00000000; // Not used8 l' {+ ]2 @! G# O: |& \, O; O
mcasp->regs->DLBCTL = 0x00000000; // Not used) S* T2 H, S% c# i/ X5 \/ [0 n
mcasp->regs->AMUTE = 0x00000000; // Not used
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1 f( [: _8 ]9 a- t/* Starting sections of the McASP*/
- ]4 U6 E% k4 G" V mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
. i& C4 ~, y, c, N: [* G while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
8 i( ~3 w' u+ c. ?# a& u6 t( n2 o; o mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
\7 B! q/ \1 p! q( X! U while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );- W H4 l' k3 i% e* ~
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
/ j1 Q! p3 b* K Q+ _- x: U while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );, h+ Z/ A. I% n7 i
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 1 ^0 U& I; d4 g5 V4 a+ u
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );3 T0 U" S) M* C; C( v
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mcasp->regs->XSTAT = 0x0000ffff; 7 z; F! |0 z3 f& S
mcasp->regs->RSTAT = 0x0000ffff; 1 I( W# b# L% l7 G% R
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;' t. n: ]0 e/ ~& S |5 e' L# @4 |
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );# V0 l! |7 R- `; u# d; z
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; & O( \3 M6 ?; h1 ]9 T) j" g+ ]6 {9 ]- r
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );2 ^. C* p' l$ N! W0 z$ T" V1 D8 @
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/* Write a 0, so that no underrun occurs after releasing the state machine */
2 C% c/ W( x7 X$ X5 u! F mcasp->regs->XBUF5 = 0;% x- I. r- X [" m% S
mcasp->regs->RBUF0 = 0;) o9 @* Z3 D) {0 U: B3 P
`2 b* W) h2 V) R# B! P i mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
6 l& H5 E& n; i* v while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
. }" c' ~8 G* ]/ w mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; " i- R4 g% C. n( p
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
8 o6 D: n$ a/ X1 Z: H while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );- F5 h, R& h2 G9 f! O
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
6 G* f+ L5 B8 H& k/ j while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;0 G+ _( V+ O4 e$ w
INTC_INTMUX1 = 0x3d;' T7 t; x; x5 k' z% C x
ISTP = (unsigned int)vectors;
$ r2 c+ D A% j ICR = 0xFFF0;
0 {, T. B, [; g% \4 U IER |= 0x12; ! e: Q4 v3 h! _0 z. c2 U
CSR |= 0x01; - D; D! ]/ `, w4 D' i
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1 h8 U. E5 Q/ K$ D; w还有就是两个输入输出函数:
; I. e6 p, T" N7 `% {void output_sample(Int32 out_data)) w# ~* T; r! M& f. @/ h7 c
{
& d: z0 ]9 a5 A; y' Z" D AIC31_data.uint = out_data;
1 }6 E. R& Y% s& u5 a4 S/ ~ MCASP1_XBUF5_32BIT = AIC31_data.uint;* k- K) a( F3 w- Y, N0 e4 M' K
}
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1 r6 O6 s9 H2 C7 A! P& S, R7 T! zInt32 input_sample(void)" s& S: c; k! k$ l
{ 5 Z* u( w8 r, t
AIC31_data.uint = MCASP1_RBUF0_32BIT;
% A9 A( c2 G5 l6 D6 T& }7 X- [( h# A return (AIC31_data.uint);3 w, Q% b, E5 F9 w( N5 h( \
}) e' s2 H0 h9 t; _% c
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