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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:
4 e; |7 _3 c2 T) tmain文件:# x$ p# n: B3 ^$ J! ?
interrupt void interrupt4(void)
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC S" Z! i3 ~8 ~1 \! G7 f
output_sample(sample); // write L + R samples to DAC , W8 D* \" B9 O8 v$ y1 Y: B/ Y) p
return;
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int main( void )
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9 p+ L& q1 ^+ A" a4 [' C /* Initialize BSL */0 j% h# \8 i0 m, w
EVMC6747_init( );
, f* s0 j0 T4 z& b /* Call evmc6747_intr function */
3 y1 \/ M4 [9 E6 Q& C aic3106_init( );4 E4 N; s# W, o) G3 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
2 m/ i* Y. j- N4 b& ?8 \1 _/* Initialize MCASP1 */' y! Z$ p5 H, T; z( K
mcasp = &MCASP_MODULE_1;
, Z7 _/ m9 E" Q+ r {* e mcasp->regs->GBLCTL = 0; // Reset
0 k0 M9 H( _4 E6 x$ _ mcasp->regs->RGBLCTL = 0; // Reset RX
( \# E* |: X8 _0 B, |+ t mcasp->regs->XGBLCTL = 0; // Reset TX( v; D8 U4 j( p# O5 O: }. A
mcasp->regs->PWRDEMU = 1; // Free-running& G. @& Q, X3 {5 o8 Y8 W8 w
// configure McASP0 receive registers
A: y4 H6 O- y( [ mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
8 y9 M. ?# W P% e: f T7 R/ G mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
4 u5 \) J5 H: y6 {3 v- y mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
g2 g- d% b; L) W6 ?* P9 u mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
F: l, q9 ?) t4 o8 `2 _0 n6 X mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
. E1 r( g0 n" A. R* q mcasp->regs->RTDM = 0x00000003; // Slots 0,13 T7 `/ C" `( c$ Q: M* D
mcasp->regs->RINTCTL = 0x00000000; // Not used
9 Z$ K8 @& ~3 @8 P mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256- U c) K T/ S" B- Z& ~
+ r/ `7 X, k( ^& s3 _" x" | mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
6 S5 i( c) O9 d. p, b2 `1 o# N mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus, g8 u. t7 B2 p8 N( Y+ d, e6 K
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
1 A" W4 P9 L* ` j5 ? ` c$ O mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
0 {! z+ { h0 F" n" \ mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
' m1 [" ^* w; S" W: E' ]* N4 F mcasp->regs->XTDM = 0x00000003; // Slots 0,17 e7 |( [. O" e( B+ ]; N
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
# x( G& t8 n& k* n6 @. i# \9 }& c mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
. c4 }, B3 x. r% x! j- {, J mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
7 x; J, c) M0 ?8 w8 H6 v mcasp->regs->PFUNC = 0; // All MCASPs
+ a9 G; ~/ z* W- H mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1* ?7 s( {1 _" {6 ]2 w8 j/ Y
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mcasp->regs->DITCTL = 0x00000000; // Not used
0 X8 h2 d' n1 l- e5 K& m; n" G mcasp->regs->DLBCTL = 0x00000000; // Not used
" m$ \0 `" d( _4 n/ X mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
9 u2 Q- b% x0 G p; D# R mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
6 O/ I5 O# h& V while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 2 A E+ n5 U. J4 h6 ~5 S6 f
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
9 K% R4 K2 }9 j1 n: X, l while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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, f A; o4 n# s" n# C% Q. }& { mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 4 H, H% Z: v3 p' `
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
. t3 C- N }& L mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 2 |# S5 Z4 x6 l+ q9 _
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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- k6 D3 ?" z% o$ q. ?" T5 X mcasp->regs->XSTAT = 0x0000ffff; ( J2 c$ ]. O, h% D6 E
mcasp->regs->RSTAT = 0x0000ffff;
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5 F" M# u p- i mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
7 u# r, w& I1 ^0 k; ^ Z8 m& B$ l while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
" j( O" N' U$ I. ` mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
4 p; o* I5 m5 R( N& Y* S/ F while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );$ @. g, \& O( E# N" [7 ?1 w: K
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/* Write a 0, so that no underrun occurs after releasing the state machine */, n) A2 o* _6 [9 a; Z' u5 t& a
mcasp->regs->XBUF5 = 0;$ }# I& T: M6 ^* H) N$ w" b7 G
mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
1 }* ~1 y* t& A. B1 v+ u" b while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
. J+ R; @0 m. O" _ t+ o mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
5 K0 W( @" Y: h; T2 H while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );/ `; L6 Z0 w. T) a' @" r; `
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
4 `( H3 _) C: n while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
0 H8 w9 b6 z) d! d" Z7 K+ }, m$ r mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; : I- b8 G3 F) W5 x- c3 z
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );- B8 O" X$ ?) y- F+ U0 n/ E( u: k
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CSR = 0x0000; J( {5 l8 s0 R1 r7 d" T: [0 r
INTC_INTMUX1 = 0x3d;1 C1 {" K b+ z' C: q" S5 Y
ISTP = (unsigned int)vectors;
9 a; e5 z s7 q) z7 k ICR = 0xFFF0;
- J/ Z9 t$ B4 r4 L P6 n IER |= 0x12;
' ?, b9 J9 g% A( R/ p CSR |= 0x01;
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还有就是两个输入输出函数:7 p. R# O2 P3 H# \; a" ~* B
void output_sample(Int32 out_data)" ~% U/ j' d7 p1 n' E" {
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AIC31_data.uint = out_data; - Y+ `% `: |. W; ~9 a' ~
MCASP1_XBUF5_32BIT = AIC31_data.uint;7 \0 E, L. j0 m# e
}
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# x. u1 \; z3 t& E u3 `+ Q; EInt32 input_sample(void)9 N( d5 S; e+ B9 [0 W2 L
{
' v& y7 Y' L7 a9 `0 @! k* q AIC31_data.uint = MCASP1_RBUF0_32BIT;8 E. e( d- G" i
return (AIC31_data.uint);
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