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本帖最后由 yyj 于 2018-1-30 11:01 编辑
$ w. Q7 z d" A- [code]EDMA sample test application
5 \% {/ i& U* } - /*
( K/ w1 o" d( _% Z% n - * edma_test.c
: n' C2 ~* z2 Z7 A$ U* c5 _ - *
/ U! y) ?$ a; x+ o4 c - * brief EDMA3 Test Application
) m" o: G% J' [5 j9 y - *
6 A" `1 j& o9 e4 T S( M - * This file contains EDMA3 Test code.( `- k# O+ f5 M: W& ]% y$ S
- *
7 w6 m2 K, r8 I7 l" F% [/ @* @% i6 Q - * NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
5 V' c/ V* r7 r9 q$ a( D, }. a - * REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT% m: h0 y9 ^0 D8 Y ]
- * TO CHANGE.
. x( D/ r3 P2 U' [! n - *% l9 z* I/ T! l! C0 r$ {5 V
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/2 J. ?8 x6 g$ H/ M) o5 J, X1 ?
- ** b+ u0 L8 t% ^2 \+ P, t9 N5 W4 g( O
- * This program is free software; you can redistribute it and/or
3 s% v4 V- T- Y - * modify it under the terms of the GNU General Public License as+ Z) `* ?! ^+ O: \/ i% H6 A
- * published by the Free Software Foundation version 2.
) A3 r5 s3 f% G7 M: F ^. @ - *
" D. l; ~# V- t - * This program is distributed "as is" WITHOUT ANY WARRANTY of any/ e8 t0 J3 Q J+ }2 a H5 {3 ^1 Q0 g
- * kind, whether express or implied; without even the implied warranty
( [ d# h$ @' i( R; P& c - * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the d y# N1 f! a9 x" k
- * GNU General Public License for more details.1 i1 O1 d! G- C! O% G
- */
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- #include <linux/module.h>
/ G! W8 M) a. E - #include <linux/init.h>2 I5 q) v0 ^, {* D
- #include <linux/errno.h>
9 t( }9 J C" P! C( A: { - #include <linux/types.h>" H+ O2 p8 M' q+ U5 r1 H% {
- #include <linux/interrupt.h>" |' e1 r( _ g
- #include <asm/io.h>% d$ d) Q9 J8 g7 B
- #include <linux/moduleparam.h>, Z1 q1 z" E: r1 ^, A
- #include <linux/sysctl.h>
& L4 r# l# S9 F! x - #include <linux/mm.h>0 n) q: l ^& L1 q( P
- #include <linux/dma-mapping.h>" @- M; \; G( n. V4 j. \4 ?/ l8 f* t
- * I# D" |( S- J1 B8 o
- #include <mach/memory.h>% _" v4 m- `4 j9 q- b7 f' G
- #include <mach/hardware.h>/ Z8 x5 i" E0 e, t; O7 [ @
- #include <mach/irqs.h>
* Z6 |3 h7 v. L( A5 q - #include <asm/hardware/edma.h>& K5 W3 _% q* R) Z
- & u% T, V4 N3 q3 B. ?
- #undef EDMA3_DEBUG7 ]& n9 M% X M; @( N& u
- /*#define EDMA3_DEBUG*/3 N" H4 a1 F! V, }$ X
- 0 d/ X2 m7 u: s n, C
- #ifdef EDMA3_DEBUG
: ?* A! _& F1 { - #define DMA_PRINTK(ARGS...) printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)* ^; i: z& }4 w
- #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
{* l6 O4 w% W9 A1 { - #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)1 ~; t0 {+ u; ?* i" r+ j7 u% J
- #else
* }; B- V% A3 k% B7 A) }' N- d - #define DMA_PRINTK( x... )5 s6 L) o i+ Q K5 B( {: W2 N% U
- #define DMA_FN_IN
9 l7 X& Z4 z# J& K - #define DMA_FN_OUT
9 n2 T" J* f. l+ |' W( j# }& m - #endif m- A% r+ S% [. y, ]6 x
- . i7 u$ {5 r5 j3 x* |/ D# B
- #define MAX_DMA_TRANSFER_IN_BYTES (32768)6 K6 H1 h, i) O P
- #define STATIC_SHIFT 3
2 ?+ W) Q- W6 _# g. d( Y" q5 j3 S - #define TCINTEN_SHIFT 20
* ~/ @# w% N$ f8 r- k* ` - #define ITCINTEN_SHIFT 21; S5 V' p6 U$ h
- #define TCCHEN_SHIFT 22
3 i2 Q6 v9 f! g5 {3 {$ ~+ C - #define ITCCHEN_SHIFT 23$ t8 p6 N8 L1 A; m
! E; X" H, ?* u9 B- static volatile int irqraised1 = 0;
' e9 O% Z! `# Q" T4 V, { - static volatile int irqraised2 = 0;4 s# ~3 P7 K7 a( p1 Q9 y* U# r5 L+ M
, M7 J2 ^ _# b/ Y" z& m- int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);% v9 c0 _- }- q. T- Q/ X$ v
- int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);1 Q9 [ N& Y- F/ p5 N
- int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
- D( T; W9 K( J& } - : ^& I/ B, J% I, _' r5 r# }) J
- dma_addr_t dmaphyssrc1 = 0;/ m7 a) R( ~( Q7 ?7 O) `
- dma_addr_t dmaphyssrc2 = 0;# U' B X( e) L1 U# E0 M
- dma_addr_t dmaphysdest1 = 0;
' j7 @: i/ [8 W6 V - dma_addr_t dmaphysdest2 = 0;! R7 L' ~% |& m$ X. S) }
- ! L/ L% f5 l) x- x3 n
- char *dmabufsrc1 = NULL;
% O; w3 p/ y8 @7 Q2 n# X - char *dmabufsrc2 = NULL;
' A8 ]" p$ r3 E1 [$ J: L+ ^% h - char *dmabufdest1 = NULL;
& a- O |4 Q) T - char *dmabufdest2 = NULL;
0 m; m7 c; H) z. r
7 ]6 `* W7 I1 _6 F3 B7 n: E5 k- static int acnt = 512;
6 ^9 @+ L- c5 a4 i& W% m - static int bcnt = 8;/ N+ W- \0 W8 A) s- u( g
- static int ccnt = 8;/ f" J3 v+ A1 y ~ A! E. e
# U7 z, ^* }" |2 p4 e4 m. }: J- module_param(acnt, int, S_IRUGO);+ R" Z2 {! [5 D6 f Z0 x. |
- module_param(bcnt, int, S_IRUGO);
8 Y( e0 I. h5 E" b: u( S/ m/ F - module_param(ccnt, int, S_IRUGO);
复制代码 $ c' Z/ \2 v' V) r7 H% H
, F5 S5 ~7 f8 W+ G 这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分,我在编译的过程中是用4 r$ \ U/ C E/ w# I- ^
arm-none-linux-gnueabi-gcc -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译,但是报的错误特别多,我又试着一个函数一个函数往进加,仍然是很多错误。
( f( E3 t3 V' p9 Y; c 我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。8 r( \1 H; x8 K& ]
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