标题: C6747利用McASP发送中断方式完成音频输入信号的直接输出 [打印本页] 作者: yusijiangchengm 时间: 2016-3-15 16:07 标题: C6747利用McASP发送中断方式完成音频输入信号的直接输出 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: 1 O9 N8 a E2 V. [+ f: \- bmain文件:7 h/ c; M a# x' m! |% g. ^0 f2 |- h
interrupt void interrupt4(void) ' f8 C y+ V/ x; q, S6 }4 Q
{ % j' u& M" o3 s( ^* W5 a% j" B. R Uint32 sample; 6 |7 } D3 m9 c9 O ! T! M! G1 L1 `) E2 F sample = input_sample(); // read L + R samples from ADC % B y1 W, ^1 `$ I2 |- {; e9 {# ^ output_sample(sample); // write L + R samples to DAC - |/ H7 k! T2 b# p6 M! Q4 } return;; n/ d0 S" b7 U- G
} ! D8 @% v' j$ B8 e( q6 `' u. C D i% U0 q
int main( void )- m! R% x6 |. q) C1 ]9 m
{ # P; z* E9 L5 g# `2 i7 C& ^, N; R, f' Y
/* Initialize BSL */3 |9 ?6 ]; G* Z0 J( n
EVMC6747_init( ); ; U: O2 z0 F- l; [ /* Call evmc6747_intr function */- m* Z$ u' C& m5 h8 R2 F$ }
aic3106_init( );8 e0 a) x7 P" _% r5 Q
while(1); 5 j! _, \ N, L. t% O( N}4 J, ]: j5 @0 u5 A; x
8 _; O% a! @* m1 v' ]
' U/ [# T7 W- b9 ]: 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 1 t. F8 R! k: l0 w9 W' W3 G" D7 V/* Initialize MCASP1 */7 g0 f0 v4 d8 P# m" ?9 a& W
mcasp = &MCASP_MODULE_1; # b* e z% x* t9 \- x% Z4 G( | mcasp->regs->GBLCTL = 0; // Reset ) F' b! u, ]# e' K0 n! [4 J8 a mcasp->regs->RGBLCTL = 0; // Reset RX& {! c$ G2 q# M; G6 c
mcasp->regs->XGBLCTL = 0; // Reset TX & G8 `5 _; z' a3 | mcasp->regs->PWRDEMU = 1; // Free-running* t. z, i m/ n9 ~1 }# J9 l2 m0 k
// configure McASP0 receive registers* L$ j( d) A+ m0 @7 e9 v
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used 1 G8 E6 W9 j: Y* b3 M7 f+ U mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus # E% f3 k' B7 f; X2 v; c mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word1 N- b) Q/ {. |
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side) 6 Z! q, i, F6 x& e O% I8 z% X mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side) . Y; B% X& ~+ E' V& n0 Y, d8 { mcasp->regs->RTDM = 0x00000003; // Slots 0,1+ U* y* z8 T! g% T1 K
mcasp->regs->RINTCTL = 0x00000000; // Not used9 _( q+ C, u7 V" G% O% O3 _$ f, D
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2565 N+ l: D& B$ i
3 e. c8 W* ~; Z3 `% l
mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used2 w8 I7 P2 ~# e0 h3 f' H4 k
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus # f- x, ^7 t7 S+ H6 E! Y! o mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word ) V r/ f# T: b8 w( V0 ?1 I" r5 P& R7 n mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16 8 Z/ P/ J% x3 f0 j5 n, o3 S mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK & R3 e% ?. q7 f4 p$ U, A9 L mcasp->regs->XTDM = 0x00000003; // Slots 0,1 2 C( R% {, v$ H# b. } mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit 0 W2 j* f/ X$ ~% K8 V1 } mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256 8 O) u+ O" T. J3 J+ V2 ? 7 e# `( X- Z( h+ s1 `+ V7 x mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN 3 w: P) o! u5 X5 e* c" B mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT7 o4 E* y% C2 w" L
mcasp->regs->PFUNC = 0; // All MCASPs : A$ w5 r" c2 k" F mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1 2 }4 p! z$ B- L* i, Y4 H; R, T1 q1 B" \
mcasp->regs->DITCTL = 0x00000000; // Not used) O! L+ |6 M, ]- P, Y5 ~; Y3 v4 O
mcasp->regs->DLBCTL = 0x00000000; // Not used: S" F$ K6 C) F0 g$ B& A. ]5 @
mcasp->regs->AMUTE = 0x00000000; // Not used : g8 p, m8 \; B. P0 t- x7 Z( w7 v5 y9 n: g; E& x
/* Starting sections of the McASP*/! m( x* L5 L5 {/ z
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 0 m9 R2 W- h/ A I# |& h* S! Y0 A while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 9 _8 t, E" C" X0 s; L# f mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; $ I2 i+ @; M* f- F4 @8 I& G# C% x1 }
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );- r6 E, M0 g0 \6 ]
' H( g l/ }! |* ^ mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 0 F; S2 t! O# U/ h* y2 b while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );1 d8 j& K/ w1 D" j9 c1 ^6 h; H: V
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; * X5 F. n, h n0 x! s# C& F
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );6 Y# Q( a T( d, \& Z- I9 H
# l( c% o$ V0 `( G
mcasp->regs->XSTAT = 0x0000ffff; / s! a( X2 t# x7 a( @# b mcasp->regs->RSTAT = 0x0000ffff; $ M4 j) k6 o0 W. D - c4 o+ A" Z0 k% G( L mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;# d# l$ R/ j& @# s
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );' o: ~* y* c- U& R
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; - _. o% Z: [9 [0 q8 \6 ]5 I while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );+ k+ I' X( V) E8 c& q8 q) [
! @2 P( M/ e/ Z" y+ L! W, m8 W3 N /* Write a 0, so that no underrun occurs after releasing the state machine */ - q7 U6 B5 n, W% k mcasp->regs->XBUF5 = 0; , a+ z4 H, ?8 g- j9 U: n mcasp->regs->RBUF0 = 0;% j. R" p6 D% r( v* ]
+ A) ]( F$ o, [$ x# P: G mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; 8 r$ M% d* Y( L9 {5 t/ } while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON ); ) V3 f7 d# e& H6 |1 g mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; 2 D0 l" ]2 ?9 v( n% ?. Y0 N7 o
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON ); 6 |) d9 d6 e+ j( x* T p& S) t: ]) v! m8 s
mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; 6 r; X5 O2 S2 t: q
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );* u$ {0 X) n' W/ M: \1 ~
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; 4 X! L3 c& B2 X6 t/ P+ v4 f$ D/ t
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON ); ' z W$ L0 g% V' Z" I* R; H2 ^- X. T8 K7 w* G4 V
CSR = 0x0000;( x2 b/ w2 }6 o" {2 M
INTC_INTMUX1 = 0x3d;3 e; [' Q; m* W) [# q
ISTP = (unsigned int)vectors;2 z2 ^% O6 @3 D1 n h t2 i
ICR = 0xFFF0; & H) d( V. l, {5 p3 J) A+ x' [ IER |= 0x12; S( b$ h; C3 Y0 O
CSR |= 0x01; ! c9 x& \! A; Y' K3 \; Y K' x
% \* n6 P" _, K9 r ! q4 D) b0 r" |0 O4 \ 0 @2 X$ B, s8 \, T( g$ S5 ^还有就是两个输入输出函数:2 m8 g0 Z ^5 G0 E. w! y1 s8 o% C
void output_sample(Int32 out_data). a2 l+ X3 F2 ?
{ 2 }7 N- k7 V3 `1 v0 M AIC31_data.uint = out_data; ; `. d4 E+ v0 A6 s( U9 _, K MCASP1_XBUF5_32BIT = AIC31_data.uint;9 [& R: b; q$ Z
} , y( `4 S6 T* b T& q" j" d* _5 c% p" n# N' I" v3 U4 ?4 E$ d: I
Int32 input_sample(void)$ H) T+ R' b0 S2 }' |0 L1 t- l
{ 6 I$ w7 |# b4 _8 S+ R. _) p AIC31_data.uint = MCASP1_RBUF0_32BIT; + i' i" o- [* t' W# W; x return (AIC31_data.uint);, N* `, ]) X; T% T
} 3 G0 N) L) g X9 H& t0 _. e3 @8 N a. V9 K+ r 作者: human 时间: 2016-3-16 11:55
可以参看创龙提供的例程:AUDIO_LINE_OUT_INTR——Line Out 音频输出(中断方式)