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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:
, G) h! l8 {# o& D8 m0 T& z- ymain文件:
1 i3 ~. j% U3 _7 rinterrupt void interrupt4(void) $ S% f8 k8 a0 K- {
{
' N( _' v3 R5 d5 U5 u Uint32 sample;
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/ p5 B1 Z' I$ K: Y6 e5 F" l) W0 n5 M$ s sample = input_sample(); // read L + R samples from ADC
8 U; [0 ^2 a* c: X# y+ f+ _ output_sample(sample); // write L + R samples to DAC / X0 f. G( o, ~3 w
return;6 t; w: A8 ]5 l! T& H: J) e
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- C6 u; c; Z/ E$ A6 c1 z8 iint main( void )
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/* Initialize BSL */
- v* h5 J* t! ~+ ^! p a( V EVMC6747_init( );
1 K6 O6 q. Q$ N( n p6 O /* Call evmc6747_intr function */
) X4 T. o4 j: Y6 N* D1 b$ z/ a4 T' R aic3106_init( );( S* C% n J( @# y% s' a: k
while(1);. c0 Q2 \$ W. I- \6 J' x
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0 A7 b* \, e3 m# M, d7 l# d6 Laic3106_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0 l" m. e( b/ C; o' }& Q: Y3 H
/* Initialize MCASP1 */
( O$ h: I$ ?% k1 X0 a/ H* k7 T mcasp = &MCASP_MODULE_1;/ _* P* z8 w. y% i6 E7 h! O0 L
mcasp->regs->GBLCTL = 0; // Reset t+ q1 y* f8 |; \
mcasp->regs->RGBLCTL = 0; // Reset RX
. o! [ W1 a! [ L# }; } mcasp->regs->XGBLCTL = 0; // Reset TX
5 {: g* g+ b9 o% X. _, ^! } mcasp->regs->PWRDEMU = 1; // Free-running, q: e; [$ H7 G& f: @! e
// configure McASP0 receive registers
" q7 d$ l( v3 c0 i2 E$ h mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
6 D7 Q' U k4 m6 V. {! p# s mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus# {7 j2 f+ }* b$ X6 E/ S
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word$ j. ]4 X5 m8 T' L3 H6 F
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
- [& J- ^, c) B8 N- G mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)/ D3 t3 X1 R! r. O8 Y: j
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
0 X. v% \) n% v0 R* Y! @ X' e. _$ ^ mcasp->regs->RINTCTL = 0x00000000; // Not used
3 V& [! R* E, I4 U mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2565 O5 x4 t- _, \& O/ }
; A a5 |9 @1 v& e$ f( O& W! l mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
7 [* F9 c( w9 X) o mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
: @) q8 W( v- d4 X3 w- F1 V mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word6 Y) G, G/ C. O0 ^0 U) |5 N
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16" ~# I7 g( q" m; |
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK9 |1 K6 ?5 O% y/ O9 Y" a
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
. m$ {: w+ v! k mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit4 ?% j, P4 W4 J+ M
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN- V- M7 ~+ u8 s; T+ e
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
5 h! R. t9 k. f j* T; d% } mcasp->regs->PFUNC = 0; // All MCASPs6 F1 O0 @) @3 ]; v G/ }! q
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used
9 G. v- B9 P( p' G/ H mcasp->regs->DLBCTL = 0x00000000; // Not used, A& H* ?/ P% V3 A' }, x
mcasp->regs->AMUTE = 0x00000000; // Not used! V! r( K+ y& q
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/* Starting sections of the McASP*/
5 R$ M' }0 `& Z3 Y, Z( A" E mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; & }1 r- v& ^! m
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); ! [. n! z, w. z2 r/ {" l0 E2 J0 s
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
+ e# u! d H) V% z while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; , M/ p4 J% p% |2 u4 ~) c# ^( B
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
# c/ u$ |! e- V& T$ B) V4 k0 l, ]; w/ y mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
H/ K+ Q$ Q1 o" k; Y/ i( n6 y6 t while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );2 }; _2 U2 y0 i6 ?1 Y3 U6 \
7 c; ]) _4 n$ x4 j' ~* e6 x% I, b mcasp->regs->XSTAT = 0x0000ffff; C, F- H$ Z7 S( h. o. |
mcasp->regs->RSTAT = 0x0000ffff;
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
1 w0 Y" ^1 T9 [( i: \. o& B while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
( c& M3 ?: Z7 r+ o& N4 D0 H mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; 4 V# R) f7 p4 d/ D9 t2 }- [
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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- A6 G) n# g& W, S5 Z6 ` /* Write a 0, so that no underrun occurs after releasing the state machine */. B, i# g6 S! l6 o" D2 g
mcasp->regs->XBUF5 = 0;
0 C# u; Q, u, g3 O4 S, U" l4 c7 M mcasp->regs->RBUF0 = 0;/ \9 i% E* c2 E+ B
" b2 u% q1 z2 D: K& D: x& H mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; ; V1 e' Z1 X& [; h% U8 O
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );, l/ y# i0 v0 N7 ?8 R
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
. I! b% B& k. R9 M6 ?4 d while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );- q0 a/ m5 {7 j7 ?& n2 r
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; % W) h# n7 C; e1 \' G5 H8 G4 o
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
" U8 a0 P* V: I+ W mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; % y( k; n* F# ]/ f% o( \, V6 Q
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;/ a, W! J1 h( p% o
INTC_INTMUX1 = 0x3d;
) w B( Z7 X4 D/ G; j9 M ISTP = (unsigned int)vectors;
& j Q% A$ N2 x6 L7 \ ICR = 0xFFF0; % i1 i% k* n: \/ r$ i
IER |= 0x12;
0 o. c" |* j2 a! n* a1 t7 r CSR |= 0x01; ) T6 _1 g( M5 V( K# z& o
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0 u! D7 [: X4 C( H$ l! h7 R3 F) o还有就是两个输入输出函数:
$ [4 I9 [$ G3 J& ^' Y' Ivoid output_sample(Int32 out_data)
# B$ R# }2 W( |( u{
5 ]6 q8 X2 R* m7 k+ G AIC31_data.uint = out_data; 8 t, G' J7 a9 }8 m4 Q3 G
MCASP1_XBUF5_32BIT = AIC31_data.uint;
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0 R' w+ S/ ~8 o* o" q8 MInt32 input_sample(void)
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6 t. { h- v- z; M3 J. E AIC31_data.uint = MCASP1_RBUF0_32BIT;: i2 ^6 L; M7 i6 B1 b% |9 P! g7 h
return (AIC31_data.uint); c0 \3 |1 _6 S# e, V) I; x
}
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