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：
. R& d9 V9 g# T' r3 l7 Z6 \
main文件：
+ K) G) S* Z& v, U# c
interrupt void interrupt4(void)
2 t% L0 a' [; P: u3 a
{
; P1 \2 x6 J) f5 Z
Uint32 sample;
8 H; L( R6 X1 w, @' x' [9 K5 q9 k
. W$ P) t$ g3 k$ d9 o
sample = input_sample(); // read L + R samples from ADC
: [- J% D6 l: ?# O" z
output_sample(sample); // write L + R samples to DAC
8 W* N# E) ^1 ^
return;
! L! V: B; R* c8 [& Q
}
9 S- l+ {5 F+ `7 z6 j6 m
9 D& K) l, T/ M/ l
int main( void )
5 g: k- P: @/ i4 `, v/ v& H1 k
{
$ `. o& ]' L) T" G9 Q/ E' \
) t3 h8 f# {5 Z" b& {
/* Initialize BSL */
5 n4 _. D( ~# g) r
EVMC6747_init( );
: U+ B5 t4 h7 C% l5 J) k+ V
/* Call evmc6747_intr function */
$ ^/ i0 m/ q8 Y
aic3106_init( );
( P8 a3 H" e& E' f0 z9 r* I
while(1);
8 B6 h( }6 }: H+ C
}
2 Y# J! V0 n L. N! I" Z2 u1 I
% D d7 i. \: R; c
/ I. w8 U4 V9 c4 g0 `
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
6 N( T0 X/ M4 ~
/* Initialize MCASP1 */
! K0 Y0 l; D& z- g; U
mcasp = &MCASP_MODULE_1;
) y/ Y) \" r, A
mcasp->regs->GBLCTL = 0; // Reset
) x, }8 p) k' K. q# D
mcasp->regs->RGBLCTL = 0; // Reset RX
8 s. y0 i& ~. U) u3 e' b
mcasp->regs->XGBLCTL = 0; // Reset TX
! j$ T% L; ~+ R/ p" g: |% B
mcasp->regs->PWRDEMU = 1; // Free-running
7 w0 E+ P; P, ^7 z6 o( g+ ?
// configure McASP0 receive registers
! ~' E8 c& q! k5 h6 A; \) ^* t& Z
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
! ]4 o/ D* t0 M( V3 q; [
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
* \9 r; G, B- B* U
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
2 c9 D% t0 O: i- _3 x2 D
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
: G) v* g- _$ y' O( b
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
) U5 U* m. j8 v
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
, W5 M: ]: N5 M9 H
mcasp->regs->RINTCTL = 0x00000000; // Not used
9 h# m) A3 S7 r
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
# {- R+ L# `9 A
- \9 j2 ?6 K. v6 y+ n
mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
+ h) o, b4 F. Z0 g. D
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
2 v( Y& u, ^; U
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
0 U- i- N: O# M, f8 A
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
4 r* [) f5 s) B2 g# ?
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
% x5 B6 m8 W* j' ^$ w
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
* j4 J: q# r5 \/ c; g! ?
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
; D2 @$ Y- n7 V9 `6 p: X# }. \- Y! z
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
, \3 }- t: C G, H5 V$ s% q
: c, j3 N6 R% }4 G
mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
: J6 K7 q, O" Z: d0 y
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
' m$ n8 m- S! f* B
mcasp->regs->PFUNC = 0; // All MCASPs
* G5 H2 x/ T0 H; H. ?" b
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
2 I6 j1 Y& X& ^' l2 U6 B. b2 l
9 G9 j+ o" }/ T/ o: h5 U
mcasp->regs->DITCTL = 0x00000000; // Not used
7 W& o/ q/ s+ Y9 w7 J# Q6 s
mcasp->regs->DLBCTL = 0x00000000; // Not used
. P' F. }% D, @2 \2 ]/ l1 Q$ [
mcasp->regs->AMUTE = 0x00000000; // Not used
( E: u# k3 D( x& ?6 M7 T' v
\# v T8 q4 |# ]
/* Starting sections of the McASP*/
8 P; O% B& Y7 |
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
# s; Q$ N% P! t% d3 c0 t- w" z
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
' g# G6 }2 M9 l7 y; A
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
6 p. T; n. V4 k- Y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
/ a" Y5 k, T O- ~6 C8 W5 @( n
6 j9 p% {0 ~5 A
mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
6 \. W4 Z5 {; h4 |! W& `
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
6 f1 o, E/ q" X: U x
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
\: B' Z6 z: V l. n, j9 N
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
3 t4 q, X2 t4 ^! X
- r$ H' ~: H) ~" ?, i
mcasp->regs->XSTAT = 0x0000ffff;
& k# ~' e* n8 Q& g8 d. {. s
mcasp->regs->RSTAT = 0x0000ffff;
' A- ?) l# V+ ]3 @2 p
* X! z4 z5 i( Z
mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
" H" j N; H3 |
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
) ?+ A3 Z/ I; ?) j
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
: j3 i7 ?& |1 P4 |
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
5 R: u K- ~3 `# v( z, g1 y( n
7 ~" @/ C! s1 O( W
/* Write a 0, so that no underrun occurs after releasing the state machine */
; W' i# C; |! D. V _4 g$ m
mcasp->regs->XBUF5 = 0;
9 c6 t# Q1 G2 y7 \9 F: v1 t
mcasp->regs->RBUF0 = 0;
, ~1 y7 i1 |% I* u8 o3 X. {: a u
8 o3 `4 Q: I9 K5 H7 Z
mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
, P7 }/ e* @( x2 [6 a+ K4 a
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
- R4 }; U1 M( A F: j/ a" Z
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
8 C" Z* ?5 N$ b0 N8 |
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
% r8 ^" I: D, B6 b+ {4 w
6 ~1 _+ _7 c- ^- w+ q/ ~" z
mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
6 T% E4 n, P. c; P# i; p; r
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );
* W9 Y7 o$ x2 k8 s( T: r
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
8 a& |) y1 R0 {. x: ^# V0 O
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
; W6 k# \0 J6 \4 S" s
- u) {9 s0 V+ E2 B+ c& ]( @
CSR = 0x0000;
& y7 ?7 J3 Q/ Z! s6 m5 A
INTC_INTMUX1 = 0x3d;
+ V$ f# T$ t! e } m
ISTP = (unsigned int)vectors;
1 F/ N, C3 L4 U1 z- [
ICR = 0xFFF0;
" `' q& F0 e8 G( Z5 P- T
IER |= 0x12;
3 J6 p: C. k: X1 b$ E% F
CSR |= 0x01;
[9 E- e( u+ J& i7 t& V/ E
1 M9 k+ s- V+ E: E0 Y
9 J3 ?" y3 D* b+ [' e
# n/ I' ?( j$ g9 \! B) `
还有就是两个输入输出函数：
6 N; {3 x1 {) j+ w! K
void output_sample(Int32 out_data)
; I: ]% n J# I6 W8 Y
{
+ o; n/ n- @; O
AIC31_data.uint = out_data;
) \% A+ S7 h& u w
MCASP1_XBUF5_32BIT = AIC31_data.uint;
# ]7 ~0 i: G' w0 W3 c
}
6 ^) x) x* W1 Y: M* t2 I5 k% U- I
* H( m( I! |9 l. _- B. t3 f. k
Int32 input_sample(void)
1 d6 N+ w7 g. z0 X/ r% P% A
{
5 Z* o4 X+ k0 t" @
AIC31_data.uint = MCASP1_RBUF0_32BIT;
' g& [4 N" @9 ^) P* h4 ^
return (AIC31_data.uint);
0 w# ~; D7 P. L1 J0 e
}
2 w/ o9 X& p0 f4 u
5 p; v) D9 o0 ~# ^/ ~1 ?
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