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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:
+ A- H6 \* L6 a1 M4 I8 bmain文件:! }5 _9 M. a1 t) R( T+ K
interrupt void interrupt4(void) ) J6 g! v1 @2 Y4 _% R
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Uint32 sample;
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sample = input_sample(); // read L + R samples from ADC
( a( E/ F8 O% e/ i% z output_sample(sample); // write L + R samples to DAC
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# ~& W7 F9 x# V, n! xint main( void )* N2 T; _+ e! w5 t) B Q
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/* Initialize BSL */9 ?/ _5 U: o5 P' F5 P6 Q
EVMC6747_init( );
2 U* Q$ b8 E: a% b" f. Z0 a. `( [ /* Call evmc6747_intr function */
, r' Q' U/ `9 h8 I aic3106_init( );5 }' F+ J& Y" f( J: b! ^/ n, T
while(1);- X8 R: c6 d" v8 F6 E( Y
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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
( v- O* }" t$ j1 f0 N9 T0 `9 H/* Initialize MCASP1 */% v, M* `0 J. \0 z# r
mcasp = &MCASP_MODULE_1;' h7 c& h6 A$ M m2 \, c7 s
mcasp->regs->GBLCTL = 0; // Reset" A1 w k; ]0 V
mcasp->regs->RGBLCTL = 0; // Reset RX
/ f5 |! R, V$ D8 I mcasp->regs->XGBLCTL = 0; // Reset TX* v4 ?. \. ]# w! m% H5 j% [
mcasp->regs->PWRDEMU = 1; // Free-running1 `) D- {, L. v4 B( c
// configure McASP0 receive registers
2 A3 r+ f% J. \ m3 s+ x mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
! g5 M! f- l" s2 @' `& d mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
~& h& N5 O6 v( ? mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
3 `, |! d5 J6 ]4 Q0 k, t+ U- ?3 n d' @ mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side), O7 S/ H2 N8 H8 j# {& a$ a
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)# {& b" y; Z" f0 y. L
mcasp->regs->RTDM = 0x00000003; // Slots 0,1
# r3 G% I( [( V7 w mcasp->regs->RINTCTL = 0x00000000; // Not used
) W+ m' c {6 p- o" } mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256! J4 G" G1 d8 v4 z! N! |
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used
K* d* N) G: j, c mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
' ^* z3 R( C1 o% F, ]1 X" L mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word: X: T0 I% |/ T, }4 ~
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-165 T; N+ z5 N0 ~ U* R' }
mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK1 F* f1 x3 A; t M3 o' l
mcasp->regs->XTDM = 0x00000003; // Slots 0,1
7 n- {2 G0 ]! O3 L mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit/ E7 a, P+ D+ o9 [
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256; y4 W! d, x# p- a9 v! H& s* |
3 F, p. i2 P/ d6 O: c( X mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
7 f9 @ |0 W' k8 C# V mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
" g; A. z4 i* h mcasp->regs->PFUNC = 0; // All MCASPs/ S6 F0 A0 e6 Y
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1( M( q& V! z8 R9 B
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mcasp->regs->DITCTL = 0x00000000; // Not used
% U/ A5 @. U4 ~* Z( R2 d$ \ mcasp->regs->DLBCTL = 0x00000000; // Not used1 o/ |9 H: B; J) N% t
mcasp->regs->AMUTE = 0x00000000; // Not used
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$ N2 x2 r1 Y3 M6 \& w% K/* Starting sections of the McASP*/
/ X; o- y8 P9 y3 [5 P( {- O0 `% _ mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; 4 \8 r w- ]. G% \* k
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); 6 z5 a; p" ]. }* H, h+ U
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON;
* o' [2 a: |+ {2 D' y9 K2 K while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; ' u7 f" Y! u* ?, ]; j- ]
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
0 K: l, i* ~( v9 N+ k! Q7 M mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
7 `5 x. @2 G, w while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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' q& ~3 s% A/ M7 J mcasp->regs->XSTAT = 0x0000ffff; . @+ n) F- J+ H2 e2 q5 F
mcasp->regs->RSTAT = 0x0000ffff; 0 M: x) y6 U" J
* q; }; S" u# t mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
+ s4 B! g4 b* Z: H! z, u; g5 y* ` while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON ); ~" F- [ R8 p
mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
2 A! S, _& M" e% K/ u while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );
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/* Write a 0, so that no underrun occurs after releasing the state machine */" x5 X) A# d3 V
mcasp->regs->XBUF5 = 0;5 ^! r3 |, G# e: Z7 @: j
mcasp->regs->RBUF0 = 0;- f1 R6 Q5 V% Q' H$ d
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mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON;
3 I8 O, \4 v L: @" Z: }( x1 ~ while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );5 J9 u. l t" P8 `! L
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON; + I8 {5 E% s& q2 o) X3 G, k
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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9 ^) t, n* o5 o' p* H A/ [) } mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON; - ]" p* T7 E& n4 Q6 C/ x
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );! a3 e( Z2 s, a3 l
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; / Q3 G- t# ]! h5 D: g5 ~
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );7 g+ C) N1 j. u( C$ \- S7 x/ X
6 P/ t9 J1 H8 D4 C! M/ s, q CSR = 0x0000;2 Z" u$ v. R. ~7 }, j: Z
INTC_INTMUX1 = 0x3d;& d: r$ }0 S$ Z) S4 _# n; L
ISTP = (unsigned int)vectors;
1 ?% ~ m- c! d3 _ W2 i. O ICR = 0xFFF0; # Z& Z& f7 w& a4 V
IER |= 0x12; 1 n6 C; h" X8 l. D. J: k" x' L
CSR |= 0x01;
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还有就是两个输入输出函数:
9 n7 Y- I0 {+ R# h9 p3 {4 Y% v) R! T! D# Pvoid output_sample(Int32 out_data) D" o+ ~$ }! M
{
2 n' B4 n: r8 U0 y AIC31_data.uint = out_data;
, d4 C7 n9 J) n) | m MCASP1_XBUF5_32BIT = AIC31_data.uint;
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, K( x, E( H1 C) s* i( W9 k1 |Int32 input_sample(void)% `6 _4 ~4 g; D& z. z
{
0 z" G$ z; ~0 v; N0 z& ? AIC31_data.uint = MCASP1_RBUF0_32BIT;3 N4 d$ b% o1 B1 F# L
return (AIC31_data.uint);! e" q& I0 I) W
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