嵌入式开发者社区
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：
3 O3 F+ Y, W8 X/ O( C4 {
main文件：
( p% K8 S/ J4 z
interrupt void interrupt4(void)
8 U% _- u3 H5 O0 i) {- {
{
_! w6 ~9 ~1 t: e$ y, y# k( a
Uint32 sample;
$ d2 V# w) w$ F/ J
* T+ x Z6 P: ^
sample = input_sample(); // read L + R samples from ADC
( N* {/ H& }6 @- I" O9 w
output_sample(sample); // write L + R samples to DAC
: k9 M6 Y [- T7 A6 f, v
return;
7 g" Q% Y: s& K, F1 t& w+ e( d
}
5 y/ b1 d' S1 K+ H
+ J& P% S" Y+ Y# l4 J% U* B
int main( void )
4 E, e; C% N- S: }! ?
{
; z4 K8 u ^: U0 T
# v: z0 Q* k r" ]
/* Initialize BSL */
, y* K# h. S, J& G/ ~# k( W- m
EVMC6747_init( );
# E& U0 O; V5 D
/* Call evmc6747_intr function */
9 J9 Z0 o. ]- d; D$ i
aic3106_init( );
/ G9 C3 ^' N' r
while(1);
Y1 l$ m5 D! e$ v. |' \% J
}
" h+ d) o1 {. @5 Y
o& Q- F4 K/ n. _' A1 @
3 t0 C( G; w( \$ ~4 A$ M
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
# B4 m8 V- s0 `3 E, W
/* Initialize MCASP1 */
* Y. J" R0 {$ |
mcasp = &MCASP_MODULE_1;
- \9 S6 k) A. U& A8 P5 Q. c* X; P
mcasp->regs->GBLCTL = 0; // Reset
) Z; {; y% z! Z f* }2 ?$ C" w
mcasp->regs->RGBLCTL = 0; // Reset RX
0 C+ Z0 R M) }9 n% _; i
mcasp->regs->XGBLCTL = 0; // Reset TX
3 J9 ^. h6 E5 A6 ?
mcasp->regs->PWRDEMU = 1; // Free-running
/ G5 J+ [2 X- _' l5 t0 Z- q# }
// configure McASP0 receive registers
+ K0 o" i8 y* j% P3 z
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
; g x' u2 R" g& a4 f
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
- Z a5 f* {$ L/ D9 k$ T! i
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
7 l; I# H2 l8 [! |9 r
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
& K2 A: Q! L" V0 _6 h
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
9 v4 W5 u0 M0 a1 }3 m; v$ _. ~
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
% ]! I& L$ `5 ^3 c- C! [+ G
mcasp->regs->RINTCTL = 0x00000000; // Not used
7 D5 f. B. h% p
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
) M% D' ]" G1 y" Z1 ?
6 g* W' t ~" ]3 D
mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
: u% o4 j0 H' g% ~: T1 B
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
; J+ V+ B6 D p( R9 Y" K
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
/ {( n( y1 m# t. T
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
5 A/ k7 x% J( ]! M0 k j
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
) a2 S; T/ B* A+ h. z
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
: T8 z( w; \! t( a4 i, z7 b1 j
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
" `! f' u, v5 I. C3 w
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
" _) j" _. @! C0 D/ V
- s: W7 C9 \( d( r" q
mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
1 [6 g( f/ [# i3 c/ S |6 J' j4 `
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
9 ]! J( I& m4 B7 b6 ~9 |; Y5 l
mcasp->regs->PFUNC = 0; // All MCASPs
# i9 c; m* z; c ?
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
4 Z# i% U$ e* w
5 j \( v8 N7 O1 y/ A" y& t
mcasp->regs->DITCTL = 0x00000000; // Not used
9 t$ x3 l5 B2 u2 ^1 k* v
mcasp->regs->DLBCTL = 0x00000000; // Not used
+ E- u, V: Y- H l
mcasp->regs->AMUTE = 0x00000000; // Not used
' X7 Y/ _6 R; Y- ~
1 i2 r* D4 B$ g: z* E
/* Starting sections of the McASP*/
; J+ ]" n. ?* H, C) ~( k$ I
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
, r# {1 ~- j' `; e5 d% R
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
. x$ c! D3 |$ t+ m0 k" ^1 {
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
: [5 f: B# f4 |) A8 F1 |3 O8 _. f9 M
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
* I o9 j3 _, {% D
9 y$ A1 d# E; A4 `$ B4 d
mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
$ r" T5 _4 L, S4 w' I+ g
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
b4 v: F: G1 m
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
! z8 R: q# u( b
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
- V U( e1 c; ^+ m7 ]
0 B, W% a* z$ {+ z( k4 g0 Q1 }: |
mcasp->regs->XSTAT = 0x0000ffff;
# c# d: S7 i- s0 n* b9 p
mcasp->regs->RSTAT = 0x0000ffff;
3 \! c" K/ u$ H: z# a0 F( J
0 T% _7 |" m9 }
mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
# c* _/ W' v. V
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
n; u: \2 u/ ^/ ~" x% @2 Q/ ]
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
8 c' y# S( t! A, u5 [( j2 v
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
* }9 j- A. `, `0 P/ h& G! e, N/ B
1 r& F; `) s. F; {' {1 V* m6 Y
/* Write a 0, so that no underrun occurs after releasing the state machine */
) W4 y+ n" j6 i2 n. t% ]% o$ c
mcasp->regs->XBUF5 = 0;
& O2 M5 \; e8 R6 l1 I) b- H
mcasp->regs->RBUF0 = 0;
+ [5 S2 w5 f. }" ^' H7 o8 `# R( x
+ o4 A& u U' G# `: j: I
mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
! O" t1 i: c- G9 k: T- @
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
5 M+ C, O q+ M0 m
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
0 m/ p5 D) E: z# M; B
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
6 l. Y a$ [8 {; Y. w2 W
' l1 }$ ^2 ^+ {+ ]% o& P) L6 c
mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
5 A8 P$ D! ~6 J2 w% V0 a
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
0 ]7 ]+ [9 u# H) Z( z% o/ h
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
' o& v& W: R% e# Q
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
2 i; X& \) Q8 S1 L* V A
/ H7 K3 h1 d; f5 v2 S$ y; D) U0 x" Z
CSR = 0x0000;
9 l: M% ~, H$ ~3 n
INTC_INTMUX1 = 0x3d;
- ]1 w+ M5 P9 V
ISTP = (unsigned int)vectors;
1 X) R- M* E0 k- _) ]
ICR = 0xFFF0;
" J! Y& U/ }9 V+ u8 S. P
IER |= 0x12;
+ p: _0 Z( [ p! y
CSR |= 0x01;
# A" @& E/ r# H# X ~: S
: a% G+ ^1 f$ \% J
+ l; g8 H; T/ k) V
' I0 {7 M2 M9 A9 [ V. j. e& ~
还有就是两个输入输出函数：
( b( w1 X$ w, a2 f3 W* a5 q7 K
void output_sample(Int32 out_data)
9 X0 \3 t! J5 Q' D% [, D6 [" ]
{
2 w& [- o: C/ J9 V! F/ u. ]
AIC31_data.uint = out_data;
' l# G2 J( {4 M. d
MCASP1_XBUF5_32BIT = AIC31_data.uint;
! p! J! i6 A: J5 Z- \- X. |& s) E3 h
}
' a: X+ d! V6 h- W+ W9 R8 |+ Q
7 Y1 d" Y, z; R/ p% U
Int32 input_sample(void)
9 y* \5 I" f" {
{
" y/ G" j# j" |6 P
AIC31_data.uint = MCASP1_RBUF0_32BIT;
4 s, S" q3 {: y+ p: {1 S) z
return (AIC31_data.uint);
0 I# U7 F, \8 _4 a4 }
}
2 o; h/ F$ \. G/ {2 U( K- p' W
i- q/ p j! W! J: [9 U+ ~( S9 ^
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）
欢迎光临 嵌入式开发者社区 (https://www.51ele.net/)
Powered by Discuz! X3.4