嵌入式开发者社区
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:
8 I6 p4 f& V8 k6 i7 j; ]2 v/ ]
#define PING_PONG_ACNT 1
1 \, Q& ?, j* G
#define PING_PONG_BCNT 8*32*40
; y( A( E7 E6 z# U4 l* p
//#define PING_PONG_BCNT 1
5 b7 e6 u S2 [0 g9 R2 M
#define PING_PONG_CCNT 1
. P0 O# n+ u( P) B( Z
#define MCASP_BASEADDR 0x01D00000
$ c4 C7 I/ s! D
#define Mcasp_RXEVENTQUE (0u)
4 I F* m# `; q4 Q6 A
+ |; H! @, Q8 y! Z1 x( O; K
/* OPT Field specific defines */
c6 F' ~, A, u2 D8 F
#define OPT_SYNCDIM_SHIFT (0x00000002u)
2 t0 U7 i% x5 `# L( p2 }% t. M
#define OPT_TCC_MASK (0x0003F000u)
" _1 n9 ]& ^: t4 t
#define OPT_TCC_SHIFT (0x0000000Cu)
5 g- b0 J) A' n% W3 |/ Y3 l
#define OPT_ITCINTEN_SHIFT (0x00000015u)
& n! e* \3 d. o7 M" x+ z0 V, K2 @
#define OPT_TCINTEN_SHIFT (0x00000014u)
- {$ X, g$ J7 b3 l, K. ~+ O5 t
% f0 {6 L/ q5 \2 T
char ping_buffer[PING_PONG_BCNT];
& G8 ?; m% d* @, b; d u" m
char pong_buffer[PING_PONG_BCNT];
r. {2 ?- o4 A2 ]" ~4 K
' u1 b* j F2 G+ H! d: }
5 ]: V1 ~" Y6 E V
. v! Z1 S9 B. j6 G! z, O
( O# ?* n9 H* M& k/ D
static void ys_edma3_init()
( C- s B- p& D; a/ X/ I
{
7 t' S8 r* r# q" K. o2 ^3 b; G) X
EDMA3_DRV_PaRAMRegs paramSet = {0,0,0,0,0,0,0,0,0,0,0,0};
4 ]! B4 @ d0 W" ]
EDMA3_DRV_Result result = EDMA3_DRV_SOK;
. {) R/ [/ a4 f" ]% x. D
EDMA3_DRV_Handle hEdma;
! @3 w# R, q+ |) t ?
uint32_t chId = 0;
1 i4 _/ k- i; P
uint32_t tcc = 0;
) P% d( E5 `) D2 J; A
4 l8 G8 o2 U4 I6 Y3 m% T
print2arm("edma3 driver init...",0);
, t+ \# W+ b0 X# ~6 c) j, b
+ D& Q; X& D# P; G% s; Z. f G9 @
hEdma = edma3init(0,&result);
- T: W) s: J& N6 S* c
if(hEdma)
8 H; T1 ~: B$ f! a: c
{
/ f. G& u4 t! u5 _
print2arm("edma3init() Passed.",0);
0 @* U3 y4 C# p# S+ j. M; b. d$ N$ |
}
* w: b0 t( H* |. }! B
else
7 F; L; a$ X5 N2 k) [- G4 A( t
{
U8 m* d) k! d2 }- p
print2arm("edma3init() Failed.",0);
" _/ J+ X2 l- V9 A! G! z+ J
}
; s" Y* p1 S9 o# [3 g
( e3 s3 ?8 U) Z7 [' ?/ N
if (result == EDMA3_DRV_SOK)
' z4 s Q& a3 r& D. Z
{
$ {+ }3 O) `) |( X, K4 @0 u
result = EDMA3_DRV_requestChannel (hEdma, &chId, &tcc,
/ F( g% ~4 n" l! ?+ U
(EDMA3_RM_EventQueue)0,
3 h0 o6 a9 x$ e1 G
&edma3_isr, NULL);
) F, d5 b9 Q4 }( r4 k' Q
}
% o( t1 }; _5 [9 ~5 h7 F
+ g9 Q7 i4 r7 @ `2 D
if(result == EDMA3_DRV_SOK)
! X8 I5 `7 Y7 C1 G
{
7 _2 C9 p t* W2 `$ t. e7 _* X
paramSet.srcBIdx = 0;
% U! A7 J, c. ?$ d( @
paramSet.destBIdx = 1;
- A) i" M+ K, W- I9 R @
paramSet.srcCIdx = 0;
# M3 V6 ]+ |$ c- X4 @- p
paramSet.destCIdx = 0;
+ @* c) P) }5 K; ~ T8 x f- I9 }
paramSet.aCnt = PING_PONG_ACNT;
+ c$ I3 C6 }/ H4 j' q5 d- [
paramSet.bCnt = PING_PONG_BCNT;
% s2 C% A9 L4 n2 K
paramSet.cCnt = PING_PONG_CCNT;
. E. k @) @+ x4 p$ I# R
# S6 z4 i0 r/ o" o" R* [, O5 v, h- j2 x
/* For AB-synchronized transfers, BCNTRLD is not used. */
( k7 N* h; j4 L' y8 e/ n3 s9 w4 E7 |
paramSet.bCntReload = PING_PONG_BCNT;
" x3 z$ Z2 G5 N1 A$ w
6 v% O2 }& o* p
/* Src in constant mode Dest in INCR modes */
, L {6 d" @9 Y# \8 P0 `9 M
paramSet.opt &= 0xFFFFFFFDu;
( e+ Z6 Y9 {! w( M X' H% U) S5 s5 @
//paramSet.opt &= 0xFFFFFFFCu;
# g% D3 D/ i9 ?+ G L( @
( {* E2 W$ V4 Q4 F, Z$ R
/* Program the TCC */
( N2 B4 k& n% L9 Q/ N) {
paramSet.opt |= ((tcc << OPT_TCC_SHIFT) & OPT_TCC_MASK);
4 H; g) u7 U1 e1 P/ [, K, s
$ l6 ~5 s( F! `1 G
/* Enable Intermediate & Final transfer completion interrupt */
3 y" A- b, j( w% T+ `
paramSet.opt |= (1 << OPT_ITCINTEN_SHIFT);
$ \, }7 l5 E. C* b% h
paramSet.opt |= (1 << OPT_TCINTEN_SHIFT);
G( [0 O' {5 c: m, X3 p& P
& i% v2 m1 K# D% x
/* AB Sync Transfer Mode */
/ q6 N! k/ j9 g! u5 D2 D
paramSet.opt |= (1 << OPT_SYNCDIM_SHIFT);
e3 H0 A4 h+ V
4 J4 i9 b- N6 j, E8 Y0 ?: @
/* Program the source and dest addresses for master DMA channel */
1 Q6 U; G, u3 f8 K8 U4 |5 H
paramSet.srcAddr = (uint32_t)(MCASP_BASEADDR+0X029C);
% p- Q' U6 n$ h# Z. H$ h
paramSet.destAddr = (uint32_t)(ping_buffer);
y8 B1 D: Z L) h% f
8 m. p6 ]9 K+ {5 i) y; b% f# k
/* Write to the master DMA channel first. */
& B n0 j; B- m% P
result = EDMA3_DRV_setPaRAM(hEdma, chId, ¶mSet);
- ~ ]; [9 A4 u3 W6 U; I( z. y- G
}
; P, Z/ [7 u5 G: @% L& R; V
& e$ @3 M. O' N2 d
result = EDMA3_DRV_enableTransfer(hEdma,chId,EDMA3_DRV_TRIG_MODE_EVENT);
" `4 k2 t* o* K
: t% n d' D. i
if(result == EDMA3_DRV_SOK)
9 _2 X) u4 f; R% r9 G5 [% F
{
) \3 M; Q7 L& s e/ k
print2arm("edma3 driver init success.",0);
5 ^- n9 H! \! J* u' _3 N
}
- f. b8 T' V) n( Q& L3 y
}
- T- R; P/ O( [; ?4 h, y
8 g8 z: o' u$ \
; K4 h- z( ?) E [' 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。。。
$ |& y+ b. b' S6 e9 A/ `$ Z
6 l) K2 ?0 y% E2 Z3 h, P
; B# R5 _$ x. g$ X9 ?; E+ K
作者:
Lewis
时间:
2015-4-24 10:47
每次DMA传输完成后都要再次使能传输
作者:
silent123
时间:
2015-4-29 23:25
Lewis 发表于 2015-4-24 10:47
s8 p( Y- s/ m, A" R8 `
每次DMA传输完成后都要再次使能传输
, j. V7 T3 b8 e1 y
原来是这样,我明天去试试,谢谢了!
欢迎光临 嵌入式开发者社区 (https://www.51ele.net/)
Powered by Discuz! X3.4