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本帖最后由 yyj 于 2018-1-30 11:01 编辑
9 b3 n) q k& R: W. s- [code]EDMA sample test application
( D6 H$ S5 l3 Z& L$ B' e - /*
3 a, v2 _/ I, @, |6 R5 m' r - * edma_test.c7 j, r! U( l- k+ `5 }. Q1 @6 i
- *; x6 i$ \" a2 w+ A- {( R. Q" E
- * brief EDMA3 Test Application
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- * This file contains EDMA3 Test code.4 D, A$ |1 q9 \- B' Y
- *1 c1 k* d6 \/ e
- * NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
# |9 j7 i7 X6 P G - * REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT) A- }5 A: f6 T1 ^6 B! U/ Q
- * TO CHANGE.
' k2 ^& X, Y5 s, o' K - *
2 }2 z. o2 `+ c: c1 P - * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/( f; h6 ~3 d, w3 J. }' n7 m
- *# L* M6 [" @: A+ r) R$ [; p
- * This program is free software; you can redistribute it and/or2 O# R7 I8 g* x* C1 E) o
- * modify it under the terms of the GNU General Public License as9 a' @/ R- m1 j
- * published by the Free Software Foundation version 2.8 O5 F, S4 C# o) t
- *
7 s/ q+ V! I" ~ C- C - * This program is distributed "as is" WITHOUT ANY WARRANTY of any
; T$ A& w% F5 b4 h; B - * kind, whether express or implied; without even the implied warranty
& S% ~+ j t; I. ]( D8 v% E) e, Y+ } - * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* H; s, U. C4 G* {/ p$ s - * GNU General Public License for more details.' `- @$ e7 S) f/ {' L& U
- */
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& D- r3 ^- r+ O1 M/ W- #include <linux/module.h>! \* h5 A# R+ u; e) q
- #include <linux/init.h>2 e' x( w+ O; W8 [$ z
- #include <linux/errno.h>- I" X% K" B% v) m
- #include <linux/types.h>
' [* i; J5 C" W8 d C$ T+ B - #include <linux/interrupt.h>
1 a) H1 [. M# j5 q - #include <asm/io.h>
: a8 I& b4 H* H, Q9 | - #include <linux/moduleparam.h>2 J7 z& j6 X' m: ]8 C
- #include <linux/sysctl.h>4 D. e' V+ Z% u+ ?4 J/ m0 j6 u
- #include <linux/mm.h>
% i9 z3 n+ Y0 Q9 B" K6 J9 @0 p - #include <linux/dma-mapping.h>
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- #include <mach/memory.h>
3 N: A7 s0 d6 D& @% z6 g - #include <mach/hardware.h>
( M& c& T( h' n% e - #include <mach/irqs.h>
6 X/ v9 F6 o7 F r( Z - #include <asm/hardware/edma.h>
# o, E6 D1 r4 x' Y1 z- A- |/ Q
) ] V4 x6 g9 y# N2 G- #undef EDMA3_DEBUG! ^: a1 L! \# Q( A+ c7 r! _
- /*#define EDMA3_DEBUG*/& S. z( t. {" H' y
- * ]- }+ D0 L8 \( r) E) m6 i
- #ifdef EDMA3_DEBUG/ y: W1 u0 }# y* O
- #define DMA_PRINTK(ARGS...) printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
2 X3 i/ H/ D* y - #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__), J$ @ H1 U! S6 E6 \: H
- #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
9 X+ z) U! h) }$ Q9 M8 E9 C" t - #else
7 E6 n' h8 U/ H8 U+ }5 s8 T1 q# P- @ - #define DMA_PRINTK( x... )* w# j8 i; b4 H$ z
- #define DMA_FN_IN: c( K5 A& @( g
- #define DMA_FN_OUT4 S4 U! K0 Y) d: @2 }
- #endif
* y& R( _8 K" o) K0 w - 9 i6 p$ @- A9 P3 z9 x
- #define MAX_DMA_TRANSFER_IN_BYTES (32768)8 M+ Y9 b6 V6 s, [
- #define STATIC_SHIFT 3' T6 }8 I9 N8 B
- #define TCINTEN_SHIFT 20
' A# p4 K) P+ y' O, z3 }# Q - #define ITCINTEN_SHIFT 21
# G( ^3 g) t5 U# u - #define TCCHEN_SHIFT 226 N9 _1 J0 G' G9 [, w
- #define ITCCHEN_SHIFT 23( O4 f$ X0 l% f3 _, B( C3 C" C& X* h
- 3 d# R" h6 c" B# ~" m8 S
- static volatile int irqraised1 = 0;) @2 C7 {) s8 _" T( G! u$ p4 c) H3 u
- static volatile int irqraised2 = 0;
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- int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);1 u8 S1 i! t0 X. [' Z m/ E1 B
- int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);- d8 v; r; F0 y) ^- M3 n$ D
- int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);* X5 U# t+ H- V3 W
- 5 H# C- u2 n4 q; Y. S. J3 O) V, {
- dma_addr_t dmaphyssrc1 = 0;
4 ]( ^( c$ `# U6 q - dma_addr_t dmaphyssrc2 = 0;4 j8 q. ~: U, {0 D1 T9 P
- dma_addr_t dmaphysdest1 = 0;2 J2 C6 ~) V" k4 G6 O
- dma_addr_t dmaphysdest2 = 0;( L6 [5 }2 b( `# M3 u" a9 \# ~2 F* b
- ; V8 [7 O" U: s: v
- char *dmabufsrc1 = NULL; K& O- d3 d0 u3 {
- char *dmabufsrc2 = NULL;, p6 f0 N, D! s. J
- char *dmabufdest1 = NULL;
& U7 n3 J3 g" }. Q) C6 L - char *dmabufdest2 = NULL;
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7 _( ]: k# d9 [) u1 J- static int acnt = 512;/ s& c; Z2 h5 B4 e% x. z
- static int bcnt = 8;
" |8 E1 |4 e" u: h+ e$ M - static int ccnt = 8;
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- module_param(acnt, int, S_IRUGO);: F1 ^# X# v2 D$ ]9 U* X; N
- module_param(bcnt, int, S_IRUGO);
+ d6 H$ a/ R5 H B - module_param(ccnt, int, S_IRUGO);
复制代码
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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
2 m. _: p7 c/ J( C* b& O* |) @5 Xarm-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。
4 B# G" |# n4 o, o5 c: ~; 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。4 ^3 E1 G6 k, @/ o# `
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