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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:' c$ _& s; ^0 ` `
main文件:# f% G5 `% s' i6 m+ h, B
interrupt void interrupt4(void)
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Uint32 sample;2 m9 j9 i! b. L' J$ |- e
- T, B0 G, D8 F/ h! ? sample = input_sample(); // read L + R samples from ADC; Q4 [+ M) ]3 q/ H$ |4 }
output_sample(sample); // write L + R samples to DAC + ^% ^, p: o- C: X" O8 t
return;, p7 S) ^* h$ t" m6 G* J
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int main( void )+ x* V% q( u# O" g5 g
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/* Initialize BSL */ h; N9 I+ ] _# H* A& h
EVMC6747_init( );
! g1 U. }4 p6 B /* Call evmc6747_intr function */; j/ g0 v; y3 }
aic3106_init( );) [( J) g8 Y" {! ?. ~! U
while(1);/ x/ }9 M" K Z
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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
$ W. s [8 v6 \/* Initialize MCASP1 */
" f3 K ~' B/ s" m, L. B/ J- I mcasp = &MCASP_MODULE_1;
9 g$ x' A" J# k, q+ U8 T$ ^$ P1 n8 `% f mcasp->regs->GBLCTL = 0; // Reset+ i2 k) O' ?: \. e0 k$ ^
mcasp->regs->RGBLCTL = 0; // Reset RX
6 l- E; A9 y8 z/ |3 L8 ?; k& _ mcasp->regs->XGBLCTL = 0; // Reset TX
0 e" `! G+ W9 a. H) ]+ K; U mcasp->regs->PWRDEMU = 1; // Free-running
2 S t2 r+ R- M4 {$ _) | // configure McASP0 receive registers# c/ ~0 ]$ h1 s5 {
mcasp->regs->RMASK = 0xFFFFFFFF; // No padding used
( M; ?7 A/ F6 y# R) Q) O1 q+ b mcasp->regs->RFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus6 Q9 X& k, I: ~) C
mcasp->regs->AFSRCTL = 0x00000112; // 2TDM, 1bit Falling, External FS, word
0 ~5 J) P1 X3 p, j& V/ ~0 m- Y mcasp->regs->ACLKRCTL = 0x000000AF; // Rising INTERNAL CLK,(from tx side)1 O5 k3 f' f+ V2 q
mcasp->regs->AHCLKRCTL = 0x00000000; // INT CLK (from tx side)
$ ?2 W* L: V5 x9 o& n2 Z2 j: ]8 W mcasp->regs->RTDM = 0x00000003; // Slots 0,11 g$ d% V$ f& K7 A |0 c9 y' A
mcasp->regs->RINTCTL = 0x00000000; // Not used
/ g1 L- S0 C: P' v5 v mcasp->regs->RCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256
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mcasp->regs->XMASK = 0xFFFFFFFF; // No padding used2 e$ T9 i: [: N3 I/ g$ E3 S
mcasp->regs->XFMT = 0x00018078; // MSB 16bit, 0-delay, no pad, CFGBus
, s0 h, B" M9 L2 u4 M2 u1 L- o2 R& Y mcasp->regs->AFSXCTL = 0x00000112; // 2TDM, 1bit Rising edge INTERNAL FS, word
1 n$ `& A' k1 n t! A mcasp->regs->ACLKXCTL = 0x000000AF; // ASYNC, Rising INTERNAL CLK, div-by-16
7 z- O' A* Z0 w ^. f) a" G* E$ p3 R mcasp->regs->AHCLKXCTL = 0x00000000; // EXT CLK, {' A H5 B& X8 n( ?4 _# }0 V
mcasp->regs->XTDM = 0x00000003; // Slots 0,1& m/ P0 r% J6 M% a
mcasp->regs->XINTCTL = 0x00000020; // interrupt on transmit
5 z& U) d3 S; W0 b4 s: H) q" ]7 G mcasp->regs->XCLKCHK = 0x00FF0008; // 255-MAX 0-MIN, div-by-256$ [3 ] a' i: i$ R0 {, f# M' X c k
# f* R1 u1 z l, c! e) W mcasp->regs->SRCTL5 = 0x000D; // MCASP1.AXR1[5] --> DIN% f+ w9 _0 R, c2 @
mcasp->regs->SRCTL0 = 0x000E; // MCASP1.AXR1[0] <-- DOUT
& ?3 u+ h" R0 k% y mcasp->regs->PFUNC = 0; // All MCASPs
) H Z. ~' U: R* ?) [( [% q mcasp->regs->PDIR = 0x14000020; // All inputs except AXR0[5], ACLKX1, AFSX1
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mcasp->regs->DITCTL = 0x00000000; // Not used' J7 C1 `8 q4 c$ {. s% a) J1 Y
mcasp->regs->DLBCTL = 0x00000000; // Not used5 k/ F. e" j; e6 B1 X- b/ c" d
mcasp->regs->AMUTE = 0x00000000; // Not used2 X7 J2 }0 D9 M+ L8 g1 j+ u( m4 l
7 E# J1 [' g0 J9 j& H; R/* Starting sections of the McASP*/2 m- u4 b+ g, A' F7 V9 K$ k
mcasp->regs->XGBLCTL |= GBLCTL_XHCLKRST_ON; ! |, J. Q1 d2 \: N
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XHCLKRST_ON ) != GBLCTL_XHCLKRST_ON ); / K9 z6 A3 X% ?/ e! I1 w8 n; b5 ~
mcasp->regs->RGBLCTL |= GBLCTL_RHCLKRST_ON; 4 d" U0 {6 N. h4 L; t' V4 G# o
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RHCLKRST_ON ) != GBLCTL_RHCLKRST_ON );
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mcasp->regs->XGBLCTL |= GBLCTL_XCLKRST_ON; / p& j: } S7 n4 ?, K
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XCLKRST_ON ) != GBLCTL_XCLKRST_ON );
! x; b3 a3 U2 k: V, @* a* }3 R mcasp->regs->RGBLCTL |= GBLCTL_RCLKRST_ON;
! Y# S/ g e5 v( G; O while ( ( mcasp->regs->RGBLCTL & GBLCTL_RCLKRST_ON ) != GBLCTL_RCLKRST_ON );% I' O/ L. Q V4 Y& F
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mcasp->regs->XSTAT = 0x0000ffff;
* p( S6 U6 A% T. m: ~8 d mcasp->regs->RSTAT = 0x0000ffff; ( Y+ H7 P1 L+ a: T% L5 V8 Z
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mcasp->regs->XGBLCTL |= GBLCTL_XSRCLR_ON;
, L6 X2 Q2 L5 [5 P& }+ o& z while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSRCLR_ON ) != GBLCTL_XSRCLR_ON );
+ v. K& ~0 ^7 L& L mcasp->regs->RGBLCTL |= GBLCTL_RSRCLR_ON;
; E) G' w2 C- m U w0 R0 n: ] while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSRCLR_ON ) != GBLCTL_RSRCLR_ON );4 g: i' I) g- C! `0 T( }
. K- H4 q1 j* x1 A /* Write a 0, so that no underrun occurs after releasing the state machine */
& ?8 [4 U. @8 u+ `: [% f mcasp->regs->XBUF5 = 0;' P- v+ U M1 o. s
mcasp->regs->RBUF0 = 0;
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2 y1 D. ~- \; q* a% ]% m8 f& c mcasp->regs->XGBLCTL |= GBLCTL_XSMRST_ON; . v! I& e5 ?) P% t$ O. d
while ( ( mcasp->regs->XGBLCTL & GBLCTL_XSMRST_ON ) != GBLCTL_XSMRST_ON );% R- a3 U1 V5 ?! Y3 K% ~1 j0 n1 C$ [" X
mcasp->regs->RGBLCTL |= GBLCTL_RSMRST_ON;
+ @3 o" p- C1 \+ \ while ( ( mcasp->regs->RGBLCTL & GBLCTL_RSMRST_ON ) != GBLCTL_RSMRST_ON );" h9 L3 u/ b1 m3 V V
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mcasp->regs->XGBLCTL |= GBLCTL_XFRST_ON;
; Y0 q) O- D* W* _: Y while ( ( mcasp->regs->XGBLCTL & GBLCTL_XFRST_ON ) != GBLCTL_XFRST_ON );; ?* d% W8 E) }
mcasp->regs->RGBLCTL |= GBLCTL_RFRST_ON; * Y# ~9 J2 p( ^, x1 ?3 j9 K' ~# Y
while ( ( mcasp->regs->RGBLCTL & GBLCTL_RFRST_ON ) != GBLCTL_RFRST_ON );
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Q9 L: z9 v( Q8 I8 o* G7 ^, ^2 t4 W CSR = 0x0000;
' u6 A; J1 X4 Q6 a6 p' ~4 c INTC_INTMUX1 = 0x3d;- N8 }+ q4 d' V! `
ISTP = (unsigned int)vectors;1 c5 s% Y) m# g/ J! h# J! ~
ICR = 0xFFF0; ) a7 L+ C* t* Z& b
IER |= 0x12; ! U' Z$ F1 u1 x. R$ |1 k( k3 ]" z
CSR |= 0x01;
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g Z$ D8 z7 l% z4 L6 ~$ n还有就是两个输入输出函数:
5 a! `" U o! X" U# b$ u; s) z' _void output_sample(Int32 out_data). r/ u2 h6 o' |$ g1 f
{
0 u, T% J8 ?: L9 \ AIC31_data.uint = out_data; $ |: S& L+ k: z
MCASP1_XBUF5_32BIT = AIC31_data.uint;
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( L. R S! l. ?8 B2 QInt32 input_sample(void)1 F& }5 s; d7 U/ ~5 h* w
{
. @2 q. }! l' m Z AIC31_data.uint = MCASP1_RBUF0_32BIT;
1 P3 Z8 J( @3 f& h return (AIC31_data.uint);
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