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：. s( s' K) O. U5 P$ O5 U2 V. T
#define PING_PONG_ACNT 14 s1 Z2 e3 X: n7 w& m
#define PING_PONG_BCNT 8*32*40 ; }1 w9 L) R, S* e//#define PING_PONG_BCNT 1 ' E: b! ]: I+ ]) O# k#define PING_PONG_CCNT 1! \0 N6 v8 j2 F9 G* O* ?
#define MCASP_BASEADDR 0x01D000006 D# C3 Q5 e2 _$ ]5 z
#define Mcasp_RXEVENTQUE (0u) Z" w5 c9 O, D
! m0 [8 x6 ]' m+ d- q: E) ^/* OPT Field specific defines */ " m" a# B c5 |9 T: P7 w* g#define OPT_SYNCDIM_SHIFT (0x00000002u). X3 M! i& N- L. C6 h. j `
#define OPT_TCC_MASK (0x0003F000u) 5 H/ T; @) ~* {% o) U( L" ~8 u9 e#define OPT_TCC_SHIFT (0x0000000Cu) 3 A( V0 \! l, ~& y0 A, x#define OPT_ITCINTEN_SHIFT (0x00000015u)) q5 e5 R& H" t" H
#define OPT_TCINTEN_SHIFT (0x00000014u) 5 }7 n( h$ t% q6 H& _6 b6 J4 S * w. V6 p% v. q# C/ G& I* {# ^char ping_buffer[PING_PONG_BCNT];& ~0 V% V% }- Y- u2 [) l9 {; i
char pong_buffer[PING_PONG_BCNT];2 @* u q) T n" C
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. r% M% V/ w" c 2 b% @5 Y6 X- h( F # R" ^2 f5 _3 y, h! N! X Sstatic void ys_edma3_init()4 Q3 x) ^7 M2 b. p
{ 6 E/ u" o( I0 j6 O* E% \, a# w! | EDMA3_DRV_PaRAMRegs paramSet = {0,0,0,0,0,0,0,0,0,0,0,0}; 8 i, F* ]* J8 N* P: I- `) k8 l EDMA3_DRV_Result result = EDMA3_DRV_SOK; P# L, W( G9 n/ H2 Z0 d! S" O
EDMA3_DRV_Handle hEdma;+ b- S+ t+ H) f5 z# Y
uint32_t chId = 0; 8 u$ V1 q! f+ A2 _" r7 s) D9 J uint32_t tcc = 0;5 L$ n' I2 ?% [: j& E8 h; T& ]- r
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print2arm("edma3 driver init...",0); - A7 [* K# R' Z( c1 p1 U e ' l$ X, W' k1 ]- _# M0 M hEdma = edma3init(0,&result);: Z+ s( n7 t u& c! G
if(hEdma) ' s# K; G9 L9 O W0 b { * ~5 j: l; t' w5 T% x print2arm("edma3init() Passed.",0); % s/ g& K- N T) l }, Y2 s, @6 M! t
else 1 }; `, W; ?& P { + f2 V1 s2 M& p' M# d2 E print2arm("edma3init() Failed.",0);' Y: Y" E: k, P8 H. {; w+ f$ v
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if (result == EDMA3_DRV_SOK) , @+ p( F8 E' o {5 Z; N" J! d! j
result = EDMA3_DRV_requestChannel (hEdma, &chId, &tcc,. a1 @. Z( |6 ]$ S
(EDMA3_RM_EventQueue)0,' m' }& B: h3 g3 B) j" M
&edma3_isr, NULL);! [: `! c4 v% p
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if(result == EDMA3_DRV_SOK); ]0 O2 _0 N O, V" \$ t) t- L
{ * w$ [3 x# s; x5 X+ b- o8 i1 \4 q paramSet.srcBIdx = 0; $ L" h' H+ t0 w; y% K0 H paramSet.destBIdx = 1; 0 u% H7 z; Z4 W6 r% m! { paramSet.srcCIdx = 0; 5 U5 s) u0 o0 k' o" V: H; G: R( `# d paramSet.destCIdx = 0;0 h1 h6 P' l6 Y+ ~
paramSet.aCnt = PING_PONG_ACNT; - @( G" H3 K# o9 q paramSet.bCnt = PING_PONG_BCNT;5 `$ g8 |4 C* b8 ^9 ]5 F
paramSet.cCnt = PING_PONG_CCNT;& ]6 O9 b2 L) L6 L0 v1 X% A9 ^& D
. X6 l' j$ j/ M /* For AB-synchronized transfers, BCNTRLD is not used. */1 a& H0 i1 }6 D5 u; c! H
paramSet.bCntReload = PING_PONG_BCNT;5 x8 r6 O" M- Y9 E* H5 k
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/* Src in constant mode Dest in INCR modes */ ; U& M3 m) b& g! s% q paramSet.opt &= 0xFFFFFFFDu; $ h4 V2 l& R2 r/ t: w6 z# ? //paramSet.opt &= 0xFFFFFFFCu;0 c1 A I( }3 i P! j
7 b$ J5 g# j0 E /* Program the TCC */3 K# I& k2 W8 c8 J
paramSet.opt |= ((tcc << OPT_TCC_SHIFT) & OPT_TCC_MASK); 1 s7 {9 b4 ~0 z* a$ h / T; o$ L9 r5 B: k4 A /* Enable Intermediate & Final transfer completion interrupt */ : z% q/ r% y: m1 Y+ y paramSet.opt |= (1 << OPT_ITCINTEN_SHIFT);% [+ e, }. d% n; V
paramSet.opt |= (1 << OPT_TCINTEN_SHIFT);9 A1 u9 U, c: c/ H1 x; p$ h _
7 o K6 n& l& S1 p3 g; @; ^ /* AB Sync Transfer Mode */. E* L/ c! ~/ N# C! ?, v N3 Q
paramSet.opt |= (1 << OPT_SYNCDIM_SHIFT);! o. u4 k. {: @
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/* Program the source and dest addresses for master DMA channel */6 A* `7 T" J; ^7 z
paramSet.srcAddr = (uint32_t)(MCASP_BASEADDR+0X029C);' S f7 y- o7 Z" k2 U w6 c
paramSet.destAddr = (uint32_t)(ping_buffer);$ V- b! Q* M7 I3 `& n; D
4 D" P/ T- k8 e5 h9 t7 T /* Write to the master DMA channel first. */, _' W6 Q, x1 K$ o
result = EDMA3_DRV_setPaRAM(hEdma, chId, ¶mSet);& j% M5 x% r) i' y
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result = EDMA3_DRV_enableTransfer(hEdma,chId,EDMA3_DRV_TRIG_MODE_EVENT); 0 E' l2 R# D: _# K# a" n * g! {3 K9 N" r2 W3 \$ c2 B if(result == EDMA3_DRV_SOK) 7 W* f$ B6 I }5 B# c. N% q {' f0 o. i& ?+ n7 N. P' p$ @
print2arm("edma3 driver init success.",0);. \7 M* k/ n0 @6 |4 J, A; u7 _
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