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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/ o: s5 n7 |* N- Bmain文件:8 }! f$ l% r) \
interrupt void interrupt4(void)
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. e" [ m3 c7 \) F# B9 A Uint32 sample;# e; U3 `" [7 {9 H9 e" Z
* y6 j3 m" O+ w sample = input_sample(); // read L + R samples from ADC j& {* `+ [' w$ J. X" j+ i
output_sample(sample); // write L + R samples to DAC 3 O9 W2 z5 l* h7 P
return;
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int main( void )
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/* Initialize BSL */
8 p# u/ f6 g( o6 c3 v' n EVMC6747_init( );
) B/ Q- N3 o* [$ u, t( X6 i /* Call evmc6747_intr function */
( B" }9 H. e8 \3 ~& ^2 Q! Y aic3106_init( );
6 V4 m( C3 X+ h" q 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; O8 i* u$ U, y
/* Initialize MCASP1 */5 g. i3 p" m: ` B V
mcasp = &MCASP_MODULE_1;* k, C( t) ~$ ?
mcasp->regs->GBLCTL = 0; // Reset
4 t3 w5 z( T E4 D5 ]! V# u mcasp->regs->RGBLCTL = 0; // Reset RX8 z. R: X U* P$ F
mcasp->regs->XGBLCTL = 0; // Reset TX
% x" ?: L5 B( T! ]1 `* X/ p mcasp->regs->PWRDEMU = 1; // Free-running
/ S0 i4 B" J+ d9 Q* y( U7 v! o // configure McASP0 receive registers& O" l; K! Q- N% A, T) O
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
! a/ g+ z0 W% u- h! B3 q: D mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus5 y( V! m/ J% d/ B
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
x$ n6 ?5 w8 D( K' F mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)5 h+ o& T, O8 A% a) B9 s
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)- [1 D d2 C* Q3 Z. R
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
; F. J3 j. _# `9 S6 W% q% X mcasp->regs->RINTCTL = 0x00000000; // Not used0 ~+ H! k) e& Z( |& S! d
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256/ Y/ R8 S1 T3 C% [% y6 [7 _
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
6 P9 J5 i; e2 a8 B L( a7 z) J mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
/ F, G8 o! T, M4 Y$ y mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
8 ^7 ~ g3 _* X3 Y mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16( x' y; a( C: u) m( r
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK4 |) _3 J! W0 D2 q
mcasp->regs->XTDM = 0x00000003; // Slots 0,18 w; g3 U g: J
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
9 J3 |( f2 |. t6 b# O4 [! o; P4 L mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2560 Y: I& o- y( ]) {
. B4 j4 N: l& ]: j$ F/ A- o mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN! B( j" V) t. @6 b) D9 |9 ]2 p
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
: P- w9 e: { G: {7 G mcasp->regs->PFUNC = 0; // All MCASPs
; h/ s; m2 z2 f/ o; m6 S mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX15 _& l. g/ X5 E' t, e* ?
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mcasp->regs->DITCTL = 0x00000000; // Not used9 Z# S' ^+ b4 s& _
mcasp->regs->DLBCTL = 0x00000000; // Not used
+ I! m3 h! B2 g7 g mcasp->regs->AMUTE = 0x00000000; // Not used
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* o5 {- W1 n# ?/ Z% L/ i4 Z/* Starting sections of the McASP*/
3 B* H" c: U! t I. J: s# Z mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 5 q; \( G' X/ e7 o
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
r# T4 Y7 s& T" t/ q0 E mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
" ?' D" S: Z3 y, M2 K while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );: J4 @% x7 A6 [2 C% [+ F* N4 ~9 M
. Q3 C& V! V# c mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
$ Z; k; O) ]* O while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );. K6 ^/ C! S/ a& K
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
1 x2 S+ F, Z6 O% h. z! x while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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mcasp->regs->XSTAT = 0x0000ffff;
' L, O3 G. Y% M8 n2 \" q mcasp->regs->RSTAT = 0x0000ffff; & K) D2 M+ S( o, Y; R% ^. s# @) C
1 U3 n% x" n. p; N1 C mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
) M: c9 _' q4 W6 c c2 n, n while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );0 y& N( j# J1 M3 ^
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; ' p8 b6 C* z7 W! g
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON ); F5 k% m1 H: K0 ?; G
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/* Write a 0, so that no underrun occurs after releasing the state machine */& U$ | N6 ^- G3 U: M
mcasp->regs->XBUF5 = 0;
! Q( R k; x7 }/ u4 w mcasp->regs->RBUF0 = 0;
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 4 M7 H3 x! f2 l& U- f3 z: y" X2 z
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
p5 w- t7 a. x5 ? J' l) r mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
$ Y+ `' W f q; |# x! f: B# ` while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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' t5 k. I8 B* k6 Z0 j/ n/ ` mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; - q4 B$ ], t, z# X
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );) Z! T' A; i2 o
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
3 {5 Y1 D" L; J5 u7 s, b6 f' i while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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CSR = 0x0000;
) [& @- ?0 O; K, ?3 y8 g INTC_INTMUX1 = 0x3d;/ G' J0 q+ M/ M5 U: c! W
ISTP = (unsigned int)vectors;
$ \# u) i& f" A ICR = 0xFFF0;
- _! G( w/ W5 h IER |= 0x12; $ y# u1 x s: k1 z, }# @
CSR |= 0x01; + e1 \6 }8 v; m8 x; r
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* X l$ [; ]1 y4 l/ a5 @还有就是两个输入输出函数:
& F: _/ u4 k0 \4 S: G* }2 M' H6 Pvoid output_sample(Int32 out_data) i0 C( Z) Z" z( K$ g; \, r
{
) A( ?/ M1 T# L( I6 Q% r9 U AIC31_data.uint = out_data;
7 a- i! w# _: H MCASP1_XBUF5_32BIT = AIC31_data.uint;
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Int32 input_sample(void)" ?. p x. x/ V4 h
{
# j" m2 G: s5 N( f# b; C6 G" c' W i AIC31_data.uint = MCASP1_RBUF0_32BIT;
- A; |1 ^* M- ~2 P4 X" |. b return (AIC31_data.uint);
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