|
|
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:" j- c; W0 d) b/ u' S
main文件:
0 E' O. C9 W- Uinterrupt void interrupt4(void)
4 b( d: T& H1 c1 \" D{6 ~ Y7 C4 q2 C
Uint32 sample;
+ M d% O# z( b; x( e! o
2 c8 u$ d8 G4 u( @7 F& Y4 T sample = input_sample(); // read L + R samples from ADC
0 s1 \2 [3 W/ S+ B. I output_sample(sample); // write L + R samples to DAC
7 R8 N _4 u- _- F return;
& _6 A2 o+ d' Z, K}. t5 j! f0 w4 X" R
6 c& H6 d( B; k+ G
int main( void )
- e' i, L3 W* f6 |( n{) H/ ~& `$ s+ T$ g& d9 Z/ Q: ^3 ^- d
9 S) F: D( @8 W/ q2 r% g% G0 Q* H /* Initialize BSL */
0 E0 u9 J0 s$ ?8 N( ^9 Y' j) x5 Y EVMC6747_init( );
$ B( k( q& z/ H; k" \& Q) s /* Call evmc6747_intr function */
7 L |/ y! w% ]- |) g6 n; { aic3106_init( );& U/ Z! @. {* d- t; b
while(1);: Q2 W4 @- |% o9 G; g
}
% E; n4 A) }4 O! z3 N/ C) g" N: @; L5 b+ d4 W
7 M K" E6 c7 ]" n! G; c+ Gaic3106_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
) A# J& |5 N6 k% Y/* Initialize MCASP1 */ ?5 ?3 S4 S. N; s
mcasp = &MCASP_MODULE_1;" [+ S$ P6 u/ i3 c1 \: ~
mcasp->regs->GBLCTL = 0; // Reset
0 I1 o# v* [5 Q3 ? mcasp->regs->RGBLCTL = 0; // Reset RX1 v0 I# v& d+ ]3 P+ `& l/ s$ e) O
mcasp->regs->XGBLCTL = 0; // Reset TX
; F5 @1 s4 F" a, o r mcasp->regs->PWRDEMU = 1; // Free-running
3 V- Q5 a' r, q/ K4 G! J // configure McASP0 receive registers
) g5 i1 c3 W$ {0 S$ E t, `) j+ E3 @' V mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
8 ]7 J: p0 j1 j7 R* S mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus8 Q9 G* K. [. s7 S8 e' n
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
8 g) N4 M1 g U' R W9 m4 a# u mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
5 j- a- S% i6 k) ^/ d; s6 e% W mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
% n4 ~* e, o* Z( h8 A g mcasp->regs->RTDM = 0x00000003; // Slots 0,12 |2 ?$ T1 F8 u; ^) ?8 Z/ n
mcasp->regs->RINTCTL = 0x00000000; // Not used
) `' U4 `1 n: E4 @" a% f mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
$ H. B5 V9 |3 m3 }* F$ o! n# H
/ O, \2 {! B7 x$ i0 t a- R mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
+ o6 _5 |3 g) G: } mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
6 c' F% Y; q/ l/ d0 f) ~ mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word9 @- Q6 y1 \1 k8 t
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-166 D+ Y: }, M) W. [* _
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
8 }0 a4 e, j/ S* Z; t% c mcasp->regs->XTDM = 0x00000003; // Slots 0,1
7 ~" O2 Z9 n; [ mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit8 l, V3 I* B# l* A% C
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
4 c9 `+ E. X5 ^/ e5 d6 D* l) m1 c8 [
mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
- g2 c8 P7 x1 y7 U1 Z4 D mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
* y! ~$ U9 S: P2 ?1 a c* m- _) k8 { mcasp->regs->PFUNC = 0; // All MCASPs
4 P* M; W9 k/ C mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX13 f6 x* Q! b F' w6 w! V
1 A+ q% }( r0 [# C mcasp->regs->DITCTL = 0x00000000; // Not used$ Z2 S6 z, K* w+ ]! y- K T
mcasp->regs->DLBCTL = 0x00000000; // Not used
9 E. l$ d/ b% ]5 _# Y u+ `0 v mcasp->regs->AMUTE = 0x00000000; // Not used
. Z# Y' I" E/ B, r' z" b& L8 Q
8 m! D7 Z* h K# q! v$ T/* Starting sections of the McASP*/* Q7 W% w( Z$ o& R& g
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 5 y, t3 S" u6 E. o/ z
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
4 X+ J. |' t) ~ mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; 5 |' R- L4 O$ V2 N2 }1 h
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
$ _9 ]: s, z: p0 Q( ]) Z3 D& H5 y
* o: O3 m5 u9 [6 w- U: _- G+ m mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON;
2 I& r7 D; I; q2 w while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );. a- L0 D' J$ u3 O3 W
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
" l4 ?, j% H7 x7 s2 s while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
1 P% m$ X+ Z: B
& r" Y/ c4 t& M* A4 H( y) j4 } mcasp->regs->XSTAT = 0x0000ffff;
# Y! a+ n# r$ u ]. E A. h mcasp->regs->RSTAT = 0x0000ffff;
( f9 J- U* D' b. J
6 T! w- k: R5 n! ^, C mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
. r! ?$ I: Z7 f2 m% Z, b7 I while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );, B# l8 i# P7 B M
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
) Y, }2 l7 [) v' J/ r! g' _- ? while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );& k9 P& X1 n1 [) u. S. Q
4 v- v$ n, u4 H
/* Write a 0, so that no underrun occurs after releasing the state machine */+ i% D7 k4 | b+ O" f" k
mcasp->regs->XBUF5 = 0;
k: r$ h. ~4 p: {% W mcasp->regs->RBUF0 = 0;
. c- z& E7 Z* }6 K% V! |7 N
. S1 E5 W" t' K: M7 m mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
7 L8 ` C1 |& M% G while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
4 H( e4 V: c3 q# k8 Y# ? mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; + o0 R" i2 A Q3 j4 Z
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
$ ~# f1 u. q* A/ {6 e2 S }3 E. C: C' o7 ?
mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; * B) p. `" ^6 {, b8 _( g" A! O
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );+ U% H- p% t# Y1 V! A
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; 0 K! a# e% Y8 ]6 p
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );& n- z3 w$ C# E6 ^
, h2 |2 _) ~3 d6 F CSR = 0x0000;$ F6 d8 u$ x3 c+ L5 a
INTC_INTMUX1 = 0x3d;
4 C& ]6 D8 k7 F& m' u1 y ISTP = (unsigned int)vectors; n$ b8 f9 j; E' @ o/ w, ]
ICR = 0xFFF0;
6 ]7 L& F% r* x4 e* b9 t, N IER |= 0x12;
$ [* l h2 Q# o. x! W9 K' a CSR |= 0x01; + H/ f7 Z8 i: u
+ `# n9 _) J9 d! U
! e7 Y0 I B$ B: r" P. u2 L; p }, F, I: [3 _
还有就是两个输入输出函数:
' V) o+ ]1 m% Q4 K: x h7 Gvoid output_sample(Int32 out_data)
0 N z0 M! X. N4 Z+ z. `4 X{1 t- y0 l( z% K2 K6 w1 F, }
AIC31_data.uint = out_data;
. l/ e; F; V* L- ]7 [6 a: f MCASP1_XBUF5_32BIT = AIC31_data.uint;; f8 F, f c" _/ _: O2 C
}
6 E. F) x) s; o: l' Q; U, M& C+ @+ Z6 W/ c) X
Int32 input_sample(void)
+ L1 n0 p7 T* u) {4 q{
/ j8 P& {; G `$ l( f% { AIC31_data.uint = MCASP1_RBUF0_32BIT;
% @ V3 b, J2 k, L; \ return (AIC31_data.uint);
: I0 ~% K9 i8 |}
8 q* L; x2 O, F6 d$ k4 A* ?8 t% J, m( V. k6 q' Y8 D
|
|