标题: edma3中断只能进去一次 [打印本页] 作者: silent123 时间: 2015-4-22 22:01 标题: edma3中断只能进去一次 使用mcsdk中的edma3lld库写的edma3驱动，在omapl138的dsp核运行，但是中断函数只能进去一次，路过的朋友帮忙看看，感谢万分。代码如下： j- v* O$ W5 p$ B7 p/ {3 a, m
#define PING_PONG_ACNT 17 f' o8 l$ \* q# t) w2 Q
#define PING_PONG_BCNT 8*32*40 ( x7 W- l3 ]; I- @ W/ W
//#define PING_PONG_BCNT 1 / J3 j4 k+ u8 u9 g#define PING_PONG_CCNT 1( }: l* D* o# e% k$ n5 f
#define MCASP_BASEADDR 0x01D000000 q# C1 w4 a0 t. V
#define Mcasp_RXEVENTQUE (0u)! i4 U# n1 s% R
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/* OPT Field specific defines */& @! V- f& [ d9 g9 t" e
#define OPT_SYNCDIM_SHIFT (0x00000002u) / `& f: u/ A( J7 \. r5 G7 \#define OPT_TCC_MASK (0x0003F000u)& \! c0 w8 ]) r! G2 E
#define OPT_TCC_SHIFT (0x0000000Cu)- v t0 O4 R3 U6 J' [, ~
#define OPT_ITCINTEN_SHIFT (0x00000015u)( O% ^6 h( q7 ^6 ^- z
#define OPT_TCINTEN_SHIFT (0x00000014u)+ O% f0 ~" Z& w' S" j9 T# P
' y; L! K/ S0 o) v: Z# R6 U( Ichar ping_buffer[PING_PONG_BCNT]; / F1 q4 ~5 b5 D6 Q! t3 k2 s8 z9 Nchar pong_buffer[PING_PONG_BCNT];5 Y" J. e" j" E) t
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static void ys_edma3_init()6 b9 }3 d2 D2 \+ S: E& z
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EDMA3_DRV_PaRAMRegs paramSet = {0,0,0,0,0,0,0,0,0,0,0,0}; $ n% m8 N# b2 } EDMA3_DRV_Result result = EDMA3_DRV_SOK;' z6 g% \. _0 W- Z2 Q0 a
EDMA3_DRV_Handle hEdma; , e" I4 E4 u3 |6 m2 L7 E+ e. ^ uint32_t chId = 0;) J0 s. ~+ P- M- Q Q# i: _0 S
uint32_t tcc = 0; * h6 r( ~: w7 q- I' `8 `( ]3 U3 l' J; r) \
print2arm("edma3 driver init...",0); " ~, M; p" x Q- \5 [5 F ^ 5 z0 P' v7 ~& s3 r& ^9 o0 p hEdma = edma3init(0,&result); S+ p$ A3 Z& |% o
if(hEdma) $ l; o* M+ g! F9 Z, \3 ^! ~+ u {* ?0 _! m0 ~; N) E. g( m4 `
print2arm("edma3init() Passed.",0); ( {/ d* G+ e: Y6 z) [ } A) ?1 Q' Q* p" O9 Z# w( d. a
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print2arm("edma3init() Failed.",0);, T" y4 H8 a& `! V
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if (result == EDMA3_DRV_SOK) $ W6 `" R/ u1 k8 I3 w% n! E) [ {% a! Q8 {' B1 T# i5 R# W
result = EDMA3_DRV_requestChannel (hEdma, &chId, &tcc,, ^7 Y' X1 O' {
(EDMA3_RM_EventQueue)0, 5 N) m* k3 a$ f; z: b6 _ &edma3_isr, NULL);) o3 s! |8 P# J, i @ _5 ~
} " r: A1 f2 O9 d" q5 N 9 f9 N* a2 T, _+ x" p) B if(result == EDMA3_DRV_SOK) " |( _1 W& b5 P0 g3 H$ P2 F6 | {- Q; S% ?# d; [: n
paramSet.srcBIdx = 0;/ Z! O3 ]% b4 ~) r5 ]0 E; Q
paramSet.destBIdx = 1; " S" P" ~7 ?4 ]2 @$ n" R paramSet.srcCIdx = 0; ! m( K$ I& G2 j S& a7 l0 k paramSet.destCIdx = 0; + @4 Q$ N0 @5 k7 f9 I$ ^: s9 s paramSet.aCnt = PING_PONG_ACNT; - | ^9 E z- i6 E( Q$ y# R; v, b1 k paramSet.bCnt = PING_PONG_BCNT; / y3 s& _/ n) @" O paramSet.cCnt = PING_PONG_CCNT; 7 S% P7 k% ]; L; ?) X$ c8 V6 _/ b 5 U- N$ c* q. L. d& Y# ^( Y, o
/* For AB-synchronized transfers, BCNTRLD is not used. */7 ^4 Z1 ?7 k5 p$ \! t+ q
paramSet.bCntReload = PING_PONG_BCNT; ! ?# ^, _3 h2 | * w t/ {6 G! A$ m /* Src in constant mode Dest in INCR modes */% r! V9 m) g( g; a
paramSet.opt &= 0xFFFFFFFDu; T6 i6 v* M. b9 q; z& Z$ M0 }$ p
//paramSet.opt &= 0xFFFFFFFCu;8 R: L7 c4 z* P7 C# {
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/* Program the TCC */ - j0 C" v: O9 c paramSet.opt |= ((tcc << OPT_TCC_SHIFT) & OPT_TCC_MASK);9 M4 d0 I" v% J; E2 Z* a
3 u+ m+ `+ a- ?+ |$ V /* Enable Intermediate & Final transfer completion interrupt */ 0 m6 L5 V1 D& Q4 K5 N5 w" H paramSet.opt |= (1 << OPT_ITCINTEN_SHIFT); 4 U% b# ]( B; i. U paramSet.opt |= (1 << OPT_TCINTEN_SHIFT);0 J4 d: E; m/ V; A3 O; l2 g
) x- Y. X4 d8 v /* AB Sync Transfer Mode */ 4 R$ h* w; k( k3 Q1 L paramSet.opt |= (1 << OPT_SYNCDIM_SHIFT);' \# [7 G3 Y2 n( K% K7 q
' |9 W. d: Z4 z- j& b" Y4 r) h /* Program the source and dest addresses for master DMA channel */ 4 J c, H8 o5 l) l* B+ m9 T# v paramSet.srcAddr = (uint32_t)(MCASP_BASEADDR+0X029C); - n3 W% y, v" z7 S; `! g* K1 U$ m" t paramSet.destAddr = (uint32_t)(ping_buffer);, f3 q( b2 `( D) A% Z y5 N
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/* Write to the master DMA channel first. */ : E5 k4 h! A5 [0 x% \$ ]: E result = EDMA3_DRV_setPaRAM(hEdma, chId, ¶mSet);) ~/ l6 N/ x& F
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result = EDMA3_DRV_enableTransfer(hEdma,chId,EDMA3_DRV_TRIG_MODE_EVENT); + N5 o; U3 [; l4 R5 q" c8 V - a! {/ b( q8 y* _ E8 ^
if(result == EDMA3_DRV_SOK) 2 y) l6 Z \: o% W: M2 J9 H6 e& Z {* ^- y; E5 G8 k3 S9 {
print2arm("edma3 driver init success.",0); 6 g7 m; d( T+ }7 _ } % a1 m# O4 J4 h7 p ~' @5 P}. E, w S2 M* D4 i1 R/ M5 e
$ F' F- K7 U( Z% ^$ ]6 t % E" M/ O, y6 N) ~EDMA3的配置就这个函数，是由MCASP接收事件触发EDMA3传输的，中断函数edma3_isr只能进去一次，请大家帮忙看看哪里有问题。。。' H. N8 E+ D% j6 U7 o a" k
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