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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:6 T4 P: w( u+ J7 V4 v# ~
main文件:" o6 g. H# C5 Z
interrupt void interrupt4(void) + s8 L2 [2 [% U! `$ R, S; P
{
# a& Y, G' N8 c1 b! Y6 K& c. p Uint32 sample;
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. e; e- c! @: _0 e/ Y& N$ ` sample = input_sample(); // read L + R samples from ADC
) X) n. ~5 ^) F. a: H output_sample(sample); // write L + R samples to DAC 8 P2 [) x/ Z1 H% }* I& h
return;/ b1 T: }5 H6 i0 v) H1 p
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int main( void )
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$ O8 n/ Q8 [; y% R /* Initialize BSL */( V! k: i% j! i
EVMC6747_init( );
1 ?2 o0 `; ~4 { i" B! `2 V /* Call evmc6747_intr function */
' ~' o" O. K: |; D aic3106_init( );( @+ D9 D( V% {- _, J
while(1);
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( R6 a: d* [' a1 k$ Saic3106_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
# h" X% d4 I# B# I `! l/* Initialize MCASP1 */* |1 d2 F; e: a- F' Y4 ~
mcasp = &MCASP_MODULE_1;
9 `( n& q1 Q# ~! L# o/ o9 N mcasp->regs->GBLCTL = 0; // Reset
: z: t! C6 p" i0 Z5 U8 S9 U7 Y mcasp->regs->RGBLCTL = 0; // Reset RX
0 c1 Q: V! D8 X mcasp->regs->XGBLCTL = 0; // Reset TX
0 c/ ~8 I/ o# \ a2 h mcasp->regs->PWRDEMU = 1; // Free-running* G9 k7 l7 y7 _3 |. D
// configure McASP0 receive registers" L) E3 W* z+ L! N
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used$ }5 f8 w4 k* j* F. p
mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
1 ^! Y1 y0 \! h9 p, b6 o1 R" P mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word+ J1 p' {+ o% Y1 A# l
mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)
* v5 E8 K9 g* C8 J9 ?3 d( }$ z mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)* W+ f- D4 _: b7 Y# Z8 u
mcasp->regs->RTDM = 0x00000003; // Slots 0,1% _3 B" B$ c3 m. A [9 Q6 L, S
mcasp->regs->RINTCTL = 0x00000000; // Not used
8 x7 r# u/ u7 a) c. G3 ` mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-2566 t K; O0 ^" y: F
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used, w" S: y; q& P( i1 ~3 y ~
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus2 S& `6 M' K! k
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word! _/ h0 s J% @/ f+ [
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16$ r5 T) [8 h9 ?& \
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK! p" |1 q" a5 n
mcasp->regs->XTDM = 0x00000003; // Slots 0,1& q, S* z1 x; V, u
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit' F* B/ p( p1 D2 h- y
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
8 U) C4 ?" Q7 | l mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT1 J' Q' R7 O/ C# U0 D
mcasp->regs->PFUNC = 0; // All MCASPs2 n# K* Q! l! y( k5 w; F9 B' C
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used% [* X! D$ j5 J# |* l' H# E
mcasp->regs->DLBCTL = 0x00000000; // Not used F0 E0 L5 d- j
mcasp->regs->AMUTE = 0x00000000; // Not used/ S/ F# O7 t& v7 c% P0 R4 c
/ s$ c7 S" \. x- I# C8 J& z/* Starting sections of the McASP*/
# ?+ z. P4 z$ i2 C mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 7 }7 ]- w# y' X
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 2 Y2 }* y; L* S0 j7 D5 k# b
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; 0 h3 j0 q8 c2 F2 T
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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* k7 a: ?$ ~* A; Y) {4 G/ ~ mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 6 J, R: d, L5 j3 Z: d4 y A6 _ |
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );& L% b* V4 m- {
mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON; 9 ]# |$ P* C1 L3 U
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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" I6 V2 Y+ F* m mcasp->regs->XSTAT = 0x0000ffff;
; P4 X9 t: t4 I. r# X1 T2 e# V3 ~ mcasp->regs->RSTAT = 0x0000ffff; $ P9 M/ J+ m: M4 ]- f9 c b
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON; j6 h3 |- ^" F6 a/ y9 E* Q' b
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );2 b$ }+ @+ i# E" d
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
" u- F% ]1 f) V while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );' z8 \+ H1 X) p+ U
Y& ]* F9 {% D1 Z /* Write a 0, so that no underrun occurs after releasing the state machine */
- [. M; F3 e7 x! k mcasp->regs->XBUF5 = 0;
# N+ x4 A! V$ E/ s% v mcasp->regs->RBUF0 = 0;% d7 V" e# F% K; W4 X9 p' p: U) y5 P
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
6 L+ R8 g7 h4 B0 p4 T while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );+ j y* U9 j6 `- s' d) T
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
; m# Q" E, z5 o" w while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; $ ^6 U# j7 l' {0 }$ \2 o& J; D7 I4 _
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );8 k; _" Z2 Q, ` x7 I
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
7 P! b% a) L- [ while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );2 o: |% D! S% S! l; v
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CSR = 0x0000;
( u6 t9 E1 a) o INTC_INTMUX1 = 0x3d;+ c& ]5 c0 L6 ?+ e0 m
ISTP = (unsigned int)vectors;( y7 g! h1 U& Y
ICR = 0xFFF0; $ Q" }3 V! \4 J! J# L
IER |= 0x12; : M2 Z( E' f& A: Z5 ~& n4 t
CSR |= 0x01; . v* `+ ^2 Y, [8 R
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还有就是两个输入输出函数:' f; `& p% R( \7 P) p
void output_sample(Int32 out_data)
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6 W/ O. n% N) p8 W! i. X AIC31_data.uint = out_data;
. _+ A- K: T) t# B% L MCASP1_XBUF5_32BIT = AIC31_data.uint;
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Int32 input_sample(void)
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AIC31_data.uint = MCASP1_RBUF0_32BIT;
0 h9 z& Y& |: R* i& `6 r return (AIC31_data.uint);) a4 g7 Q5 Y; M/ U
}
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