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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:
2 \; s4 b. O0 \" @0 Vmain文件:' D& s" ]: j2 j
interrupt void interrupt4(void) 1 O2 f- ~8 o9 E
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Uint32 sample;
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% t: g( c* N( ` z' U sample = input_sample(); // read L + R samples from ADC- h0 u) Z8 }* k- J; B7 B/ u
output_sample(sample); // write L + R samples to DAC 2 ]8 u7 l# d" M9 W+ M/ x' j
return;
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int main( void )
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4 [6 q3 [% M6 d8 f( v! ~ /* Initialize BSL */
0 p$ |0 @, C$ r EVMC6747_init( );; W, }" y+ y: Y5 v$ B8 o3 Z# z
/* Call evmc6747_intr function */3 a' _7 Y! _/ h2 |- @
aic3106_init( );
4 e5 }5 P0 K7 U% @5 {8 ]7 G while(1);9 H5 P) o, T4 i2 X6 d
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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
/ {4 T6 q" q7 e5 c) M; V- ^/* Initialize MCASP1 */1 h2 o0 `( p7 |1 Q y0 H% L3 O
mcasp = &MCASP_MODULE_1;
( [" I' B( r) t6 ^ mcasp->regs->GBLCTL = 0; // Reset7 ~% l% w. J# K
mcasp->regs->RGBLCTL = 0; // Reset RX1 e9 O0 U [% {" e6 n
mcasp->regs->XGBLCTL = 0; // Reset TX
+ {8 h/ @9 D2 @& U* s3 x mcasp->regs->PWRDEMU = 1; // Free-running
8 W7 ?: c! h0 P // configure McASP0 receive registers8 C+ ~. Z9 g# X s! s! {
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used& {8 U6 p9 p! ?+ Z6 T
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
+ D6 v" A9 j1 Y8 E* ^& s mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word/ E- A E; U N0 t
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
l2 J/ J8 v/ ~( r8 W% |: X mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)/ g( [! j, v7 n- S- t
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
4 W* G, ^: k6 Q mcasp->regs->RINTCTL = 0x00000000; // Not used( }! z- \% ~* c R% A! s! w% v4 B
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
5 q" G% Y; Y! Y5 S- {3 Q mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
# Z R$ p6 Y$ a) | mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word9 U& `9 A7 k8 u" K" U8 C
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
: m! @) p8 Z5 V. r' Z mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
. P9 G1 `9 a8 E% o2 ~* t: A" H mcasp->regs->XTDM = 0x00000003; // Slots 0,1
( V/ F8 m# A1 b mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit4 D( F$ p: n! R. M; C+ X
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
% D) A: F1 {' f/ k+ N; P2 I5 A mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
; ~& p8 r2 \3 b) W. F8 w mcasp->regs->PFUNC = 0; // All MCASPs
! y7 {, o. O5 x/ y; a mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX18 c3 C% @, Z' W* ~
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mcasp->regs->DITCTL = 0x00000000; // Not used, }% d: I. Z) C8 J1 S
mcasp->regs->DLBCTL = 0x00000000; // Not used
8 l# x+ w; f( D) ?: T- y mcasp->regs->AMUTE = 0x00000000; // Not used- O4 b. Y' Y) ]' o+ M
+ l, c/ d& p) }& W$ b2 A/* Starting sections of the McASP*/9 H$ Z; ?0 ^- Y
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
6 f# m7 N! r2 y, A# w; V* q- F: q while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); $ m! z2 z: ^* I+ C% H
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
6 x' C' k: e! z0 e5 d& h while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON ); C7 ^# V8 ~, J; x
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 1 _1 |0 S5 o9 r
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
* Q# K: \$ Y: q: b. r: p mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
/ P& [1 Y- A4 L) @ while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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. Y2 _3 J- p8 G mcasp->regs->XSTAT = 0x0000ffff;
% V9 i% ^$ g: S9 G! v4 r mcasp->regs->RSTAT = 0x0000ffff; 4 `0 g# L( v% I/ n( ]0 P- g
7 J: H1 H" T L# u* x mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
# l; v- f w3 N$ z/ O4 j* ~' K while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
. `: ?% C) E! G$ w# @ mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
- ?- Y- z' }7 P7 |" U while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );% x/ S; `! I$ I* N9 g
( K) A- F# Q4 X& { /* Write a 0, so that no underrun occurs after releasing the state machine */; Y: M0 p: ^9 M8 O9 P; H
mcasp->regs->XBUF5 = 0;
9 Y) {! c6 h% A$ J" S mcasp->regs->RBUF0 = 0;
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o5 s2 v/ p. \8 O& ~/ f) w mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
/ h# c. q7 [$ ]5 U) M8 ~) I while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
' d& G+ X9 z# N mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
$ B& Z( l. y6 ^0 P/ X7 V8 s while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );$ p; ~' i) U9 E0 v, t& [
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 5 S \* {2 L, U4 q4 E" l
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );: W- l% Z% b. N2 D& I
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
Y+ y# g+ r* I; n while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );, ?( D/ U( N- i' l, |4 q
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CSR = 0x0000;& o+ S7 y/ y2 Z2 ~) ?( o/ O. H2 A
INTC_INTMUX1 = 0x3d;
! Y- T9 m/ \; o ISTP = (unsigned int)vectors;4 q# b: p5 J+ Q! n" a/ b3 G
ICR = 0xFFF0;
0 d" m/ X# q, m( @$ q' s3 Q IER |= 0x12; $ l; ]9 y7 _. _" d
CSR |= 0x01; * }8 w+ _- }* V3 ?& Q* _
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还有就是两个输入输出函数:
# @8 i& S. d8 C( Y8 ^ e1 tvoid output_sample(Int32 out_data)
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AIC31_data.uint = out_data;
: ^7 P7 I$ R5 w! v# X6 P: F' | MCASP1_XBUF5_32BIT = AIC31_data.uint;# w8 H4 c. A& @ l' V
}
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0 N. I$ B/ _8 ]1 C5 \- BInt32 input_sample(void)& ~0 x! I% I6 Y+ }' g9 }
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
6 V3 x' Q! r) _# c$ e return (AIC31_data.uint);" \: d+ g' k6 S
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