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本帖最后由 yyj 于 2018-1-30 11:01 编辑 & i, D/ Z: [" g
- [code]EDMA sample test application
# P4 H" W: G' W7 f" y, J0 O - /*
2 z; }+ Z& ^9 X) M4 Z - * edma_test.c+ F' n, i& ~9 A) u$ i
- *
; a, B6 K# ]- H4 S- h+ _8 H1 f - * brief EDMA3 Test Application
8 G; } X8 V( G, F$ Q1 o - *
3 y( F. G; b9 z- @ - * This file contains EDMA3 Test code.
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- * NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
$ F0 z: m) Z5 e - * REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
0 h7 ?' T% x* J - * TO CHANGE./ X& S: G) s) C$ V
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- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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- * This program is free software; you can redistribute it and/or
6 W# R! P" E3 H5 L* {$ c - * modify it under the terms of the GNU General Public License as/ p4 M% K9 {/ N& Q% S k; ?
- * published by the Free Software Foundation version 2.
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- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
# F4 D# i% l) N0 c - * kind, whether express or implied; without even the implied warranty% q B0 m# q& z" p' N+ ~3 j5 K1 v
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the6 k9 b$ D) i+ B
- * GNU General Public License for more details." \5 J4 d# h6 Z, j
- */
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/ R7 R n2 z$ p1 q& }( r- #include <linux/module.h>" @: H4 U: Z& Q) n7 M. [3 q) N
- #include <linux/init.h>
9 `' o; ~; m/ T' r# v _ - #include <linux/errno.h>: z6 K; {1 V5 l' w: o. E1 I
- #include <linux/types.h>
% P' q: O6 L7 N/ G - #include <linux/interrupt.h>9 G* h0 |3 b2 S
- #include <asm/io.h>$ ~" u- B9 l3 }# D" e5 A. w
- #include <linux/moduleparam.h>
( w; p/ u- g' `8 e) d - #include <linux/sysctl.h>
5 [$ M: I E$ n& s, y" n - #include <linux/mm.h>$ [# d0 K e) v7 Z7 {
- #include <linux/dma-mapping.h>
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- #include <mach/memory.h>
& p" a5 _4 ]% N: P/ p - #include <mach/hardware.h>
! t$ ~' {# o0 v& r0 I) S6 D - #include <mach/irqs.h>
; |5 Z8 {% L! G7 `# q' l' g q - #include <asm/hardware/edma.h>5 O% v! o6 o( |+ ^$ R
- 8 w6 `. h5 r z) t! {+ u
- #undef EDMA3_DEBUG
! [: O2 Q: J( b+ Q7 a+ y - /*#define EDMA3_DEBUG*/
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- #ifdef EDMA3_DEBUG
# Z* R! W" D) ^3 u1 w5 w% t4 |) J2 _ - #define DMA_PRINTK(ARGS...) printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
5 d3 C6 x$ y. i4 U6 U - #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__). ?" g1 f$ y) R
- #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)# G* s& N: V* ] i
- #else
( ]7 z; f! R! |. B- [ m - #define DMA_PRINTK( x... )' l1 d' C8 @# L
- #define DMA_FN_IN
+ x- Y( x6 w4 h( B - #define DMA_FN_OUT
% y$ ]& v; n9 @) ` - #endif8 U3 S l1 q r/ q
- " f8 n4 I h# s, l9 O! O
- #define MAX_DMA_TRANSFER_IN_BYTES (32768)
8 g, C% S9 f, q/ d& R - #define STATIC_SHIFT 3
8 M a* D' U: A5 \; N8 y. H i - #define TCINTEN_SHIFT 20- h& g/ `* L4 n, _$ o# x
- #define ITCINTEN_SHIFT 21
' B7 O5 f* v9 B+ Q! w% X; u - #define TCCHEN_SHIFT 22' M' |5 u! g, z3 q* u- B! t7 t
- #define ITCCHEN_SHIFT 23
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7 `! M% d% R/ U/ y4 @* ]' ]- static volatile int irqraised1 = 0;6 d9 N, K6 T5 N1 M% u% |6 s
- static volatile int irqraised2 = 0;
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- L- \! b0 D( D( d) _- int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
* m% e& O0 E2 D9 A - int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
0 U; A8 f2 L" }( c - int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);/ P# m" {6 S" q6 M% K
- 8 k( N# U1 b; u. A4 q- V$ i3 h
- dma_addr_t dmaphyssrc1 = 0;
$ ?9 Y8 Y& d$ M0 i! X+ F$ C - dma_addr_t dmaphyssrc2 = 0;/ s( ^: M+ K. w* h
- dma_addr_t dmaphysdest1 = 0;" h8 }# r0 L9 c; }( z( n( Y
- dma_addr_t dmaphysdest2 = 0;
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- char *dmabufsrc1 = NULL;
+ g m8 |/ g! }! _9 T9 c - char *dmabufsrc2 = NULL;
; ~3 t1 Z# A- }5 K - char *dmabufdest1 = NULL;1 J$ M5 w, q, K* M d/ v' m
- char *dmabufdest2 = NULL;
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- static int acnt = 512;
6 @7 k$ U& n' u. E) O9 } - static int bcnt = 8;( t5 J# O0 L" G/ j" `# y
- static int ccnt = 8; e/ j9 }8 W; W- J: c3 _
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- module_param(acnt, int, S_IRUGO);+ x& X! ~! R3 y$ l
- module_param(bcnt, int, S_IRUGO);, P5 O8 T+ ^( v- T* W
- module_param(ccnt, int, S_IRUGO);
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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
" H5 W, M: X. `: ~* A! karm-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。5 |( o/ @$ M$ M/ `
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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