OMAPL138如何在Linux下使用EDMA3驱动

yyj · 发表于 2018-1-30 11:01:43

本帖最后由 yyj 于 2018-1-30 11:01 编辑

[code]EDMA sample test application
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/*
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* edma_test.c
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*
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* brief EDMA3 Test Application' l% T" \7 T7 D- J6 A, e
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* This file contains EDMA3 Test code.
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*
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* NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE g3 l' o3 B( r' u4 v" I
* REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
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* TO CHANGE.6 w$ T1 M& r$ ^5 a
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/; Z$ ^2 c' }! m6 b' T
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as- G7 I- R- ~4 l8 G8 J' I
* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any- l* t. x. \* O" \6 y# e6 ~+ ?) m
* kind, whether express or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the, V) S7 B% ?5 G
* GNU General Public License for more details.1 x" v- E* A8 f5 x2 U; L
*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/types.h>/ B3 s- O1 f( O7 G
#include <linux/interrupt.h>
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#include <asm/io.h>2 W8 M# c' [: w' U
#include <linux/moduleparam.h>6 w& H* f4 ~' A% |* B! e
#include <linux/sysctl.h>
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#include <linux/mm.h>/ N, r4 M) l3 `- Q4 B, R! |' ~
#include <linux/dma-mapping.h>
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#include <mach/memory.h>
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#include <mach/hardware.h>0 X5 R- W; w1 Z
#include <mach/irqs.h>9 D" N+ _( _$ J$ v5 V* e& b. y- W
#include <asm/hardware/edma.h> V4 X: [* f0 E8 D. t: s2 z
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#undef EDMA3_DEBUG
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/*#define EDMA3_DEBUG*/; s4 F/ r4 z1 J3 s
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#ifdef EDMA3_DEBUG/ N2 S" r/ C' j
#define DMA_PRINTK(ARGS...) printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)8 I9 h/ S" o$ C( L1 S1 c
#define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
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#define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)6 ]6 q; j6 I# a% N
#else$ L' C1 T& W- h) o5 A7 `
#define DMA_PRINTK( x... )) z9 @7 u7 _( y3 F
#define DMA_FN_IN" e: M8 \8 j. E
#define DMA_FN_OUT% T8 R* h. V" ?& |- j+ {& b$ S* N
#endif% e1 ]# ?* b: [0 T: V- r5 k
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#define MAX_DMA_TRANSFER_IN_BYTES (32768)7 x5 N2 Y0 c- b- s6 s/ H
#define STATIC_SHIFT 3
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#define TCINTEN_SHIFT 20
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#define ITCINTEN_SHIFT 21
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#define TCCHEN_SHIFT 224 Q+ K# `$ F5 w' [
#define ITCCHEN_SHIFT 23% n- H% b1 b- l: q) H# U; \" I
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static volatile int irqraised1 = 0;
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static volatile int irqraised2 = 0;- `4 r/ k5 e3 h- U4 k
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int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);4 p, m% c: j6 l2 @
int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);; u' Y9 r7 y; O; ~, c
int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);* G6 M" ]4 ]7 x( I
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dma_addr_t dmaphyssrc1 = 0;
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dma_addr_t dmaphyssrc2 = 0;
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dma_addr_t dmaphysdest1 = 0;
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dma_addr_t dmaphysdest2 = 0;
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char *dmabufsrc1 = NULL;
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char *dmabufsrc2 = NULL;: L# @/ h( x5 G( ?
char *dmabufdest1 = NULL;4 ~+ E5 n% O8 T% E; F P1 w
char *dmabufdest2 = NULL;
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static int acnt = 512;
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static int bcnt = 8;( w+ ~% J0 S3 B( G$ H. b
static int ccnt = 8;
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module_param(acnt, int, S_IRUGO);7 K4 Y; z; t( Y: x
module_param(bcnt, int, S_IRUGO);' u" }3 J0 X9 ]3 P- \ s% w% F% C- ]
module_param(ccnt, int, S_IRUGO);

复制代码

   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
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。
   我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

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