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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 K) n z$ a( z6 c' T: j, R* t
main文件:7 Z/ g" f8 B2 a8 G# H
interrupt void interrupt4(void) " g9 ^# Z! \6 A( V( S( V% c4 J% m
{
7 r& h+ a I) Z1 Z2 R0 w1 } Uint32 sample;
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! y$ W# c) R6 h! K6 Z sample = input_sample(); // read L + R samples from ADC
, T' I" g/ \$ t: r output_sample(sample); // write L + R samples to DAC
5 N& l3 V8 v# ~* ?% J# q) [ return;
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- y1 Y( U6 N+ r3 Aint main( void )
4 F5 X1 U O4 u# R* ]) f{
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# b6 e! P2 c1 k0 K* l" ` /* Initialize BSL */
. r. ]2 y; _3 O EVMC6747_init( );! E: ?- m2 T! P. G
/* Call evmc6747_intr function */
5 x5 r# v/ k7 P/ f% H: z" J aic3106_init( );; U4 c! q0 L0 C$ M/ `, H
while(1);
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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
# i K% P# X1 a8 Y6 M) [/* Initialize MCASP1 */
/ ^0 l- }/ C/ `$ d% S% _4 `- W mcasp = &MCASP_MODULE_1;8 `; l) U n _/ A) T* P0 z, S
mcasp->regs->GBLCTL = 0; // Reset( x% Q$ n+ u O/ M
mcasp->regs->RGBLCTL = 0; // Reset RX: U" k) p1 }* h$ T3 `5 r6 i* o9 i7 b
mcasp->regs->XGBLCTL = 0; // Reset TX5 Z7 p% m1 j3 O1 H+ O i
mcasp->regs->PWRDEMU = 1; // Free-running! k% J8 s9 G5 i( |
// configure McASP0 receive registers
3 b9 K2 F1 F8 c% z$ H mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
& C" w9 U2 l& F; y/ r mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus% e5 w$ z8 i9 I* O! N0 [
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
) H& k4 r% E3 A+ _' b, ]; L& `- n8 i mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)- @3 G' [3 h3 W2 W- @/ j5 k4 W
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
0 g4 U: V$ ]* b+ T. U& {! u( w0 S mcasp->regs->RTDM = 0x00000003; // Slots 0,1. f; X1 I# {1 q
mcasp->regs->RINTCTL = 0x00000000; // Not used6 z1 c3 F5 d, V3 q5 n
mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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' t# M+ C4 Y9 ?. q mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used- ^/ V2 p. Y8 P% ^" ]
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus' k# t" P3 k; ?
mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word% p# y W0 e7 h4 I5 ]' p
mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
5 t& d, r& U' V& L9 Q% i mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK
8 y% L$ N5 B; d% G. E9 d8 d$ \& ]9 H2 K mcasp->regs->XTDM = 0x00000003; // Slots 0,18 }7 e+ N$ a6 n1 Z
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit9 r% X4 ?. S! E- Q$ l) O
mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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6 r* f% G( B0 Y1 }, n# z7 l mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN
8 h. o5 |7 R6 W$ s6 i mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
( ]' q$ Q1 B" J: s9 P% w/ q mcasp->regs->PFUNC = 0; // All MCASPs% K$ L0 d" X" l
mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1# Y6 B: P& X' Z y2 t
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mcasp->regs->DITCTL = 0x00000000; // Not used
2 F" L' j$ Q# _+ O8 [7 f( k. J mcasp->regs->DLBCTL = 0x00000000; // Not used
0 z) b+ v8 A* G [ mcasp->regs->AMUTE = 0x00000000; // Not used
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/* Starting sections of the McASP*/
, U/ e1 w4 @3 K! p8 S; V$ s" h w mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON;
. H5 b. j8 f3 r8 [2 X1 { while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON );
( f2 U# @5 Q; ]" M9 w' h6 m mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; l% M5 S+ E& e* ^3 N
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON ); P! N0 P* S9 z" {
: R1 P5 S2 r4 Y6 a. L5 d* h6 N mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; 3 f2 i8 I- Z3 v9 I) K( X6 t0 x
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
% N; q% {6 H/ Q- r# L# [6 [ mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
! i" [ ~! ^1 U while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );
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) b8 ^. ?3 r' I; V) H mcasp->regs->XSTAT = 0x0000ffff;
5 _7 {6 B8 R! O' m9 ~ mcasp->regs->RSTAT = 0x0000ffff; , T# t0 v2 e* S. [9 F E# n
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;3 `- T! l7 I; o3 d7 k
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
3 i- F) n) u, r- X% X& C6 [ mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON; % t0 x' v- @/ Z( k" o0 W9 }
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );+ i/ |( I$ `- U' `, w l( C+ w
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/* Write a 0, so that no underrun occurs after releasing the state machine */
% n/ @8 } {$ l" T0 w G; P mcasp->regs->XBUF5 = 0;- g; i' @3 N/ j5 R' M) @
mcasp->regs->RBUF0 = 0;
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2 ~+ w- [3 l* g4 j2 J1 Q mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; % Q; s) c/ m. a, S5 L8 f
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );
* X# L# \: I4 b( y2 N mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
- F- {: l {5 `# u2 c$ K while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );
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' L! x3 G2 x1 A" S$ Y2 G' ` mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
2 i7 ]) ?2 h8 X( K while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );$ V$ Q7 E6 T! I( v
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON;
; h" n( y+ K6 C6 I3 Y! Q while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );/ |- Y5 h6 Y5 T' \
7 n( g' v* k. _ CSR = 0x0000;
' ?& ^) y; }' w( R& z: V; ?7 K( @/ C INTC_INTMUX1 = 0x3d;$ E3 Z9 p0 x% C. E! J* x
ISTP = (unsigned int)vectors;) h7 L1 O L$ [. p# L
ICR = 0xFFF0; - I' ?3 n. y7 W3 b& @
IER |= 0x12; 9 F1 w, |! q3 u) ?: q: |- g( [
CSR |= 0x01;
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还有就是两个输入输出函数:
- r8 a. G& b& s7 @# Y9 zvoid output_sample(Int32 out_data)" X: _3 E! _1 h4 I
{
) y& k2 T1 ` s c9 r AIC31_data.uint = out_data; # h! ^ j9 S! T ?# d! }
MCASP1_XBUF5_32BIT = AIC31_data.uint;
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* d6 |# M$ ]4 N4 U6 U3 ^Int32 input_sample(void)
# C' p& \" ^4 P% f7 S3 R% [0 p. D& R/ s) H+ O{ * u, t5 N1 U; z
AIC31_data.uint = MCASP1_RBUF0_32BIT;
* C7 n& b2 c, J( M# }" t return (AIC31_data.uint);
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