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标题: OMAPL138如何在Linux下使用EDMA3驱动 [打印本页]
作者: yyj    时间: 2018-1-30 11:01
标题: OMAPL138如何在Linux下使用EDMA3驱动
本帖最后由 yyj 于 2018-1-30 11:01 编辑 , L% V+ o# G; t6 C
  1. [code]EDMA sample test application* D4 c$ I8 W5 o  X' ]6 O$ O
  2. /*; E5 y) f7 h& V, o: z" m
  3. * edma_test.c" Z5 e7 }9 B0 H0 F0 U: ^* [  u
  4. *
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  5. * brief  EDMA3 Test Application# |( G; _# p# ]4 h3 [
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  7. *   This file contains EDMA3 Test code.
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  8. *
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  9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
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  10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
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  11. *         TO CHANGE.  d0 _0 a5 i, C% ?' s' ^
  12. *
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  13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/+ x' p) x; J5 m$ m* g( N
  14. *
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  15. * This program is free software; you can redistribute it and/or& o1 o6 b+ x' K
  16. * modify it under the terms of the GNU General Public License as
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  17. * published by the Free Software Foundation version 2.
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  18. *
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  19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
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  20. * kind, whether express or implied; without even the implied warranty
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  21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the( M) B. g0 {7 y/ J) q0 P
  22. * GNU General Public License for more details.
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  23. */
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  25. #include <linux/module.h>" J  \7 M2 x7 [7 R8 i
  26. #include <linux/init.h>1 O* N. t! e* [# c/ n8 C5 x
  27. #include <linux/errno.h>, a/ }: h6 U8 p+ G! H
  28. #include <linux/types.h>) g8 J/ d5 h* T/ X' Q; ^
  29. #include <linux/interrupt.h>2 T! p4 I$ T+ y, H# `9 V
  30. #include <asm/io.h>/ @% @" I* Z5 S! T% V, o
  31. #include <linux/moduleparam.h>
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  32. #include <linux/sysctl.h>
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  33. #include <linux/mm.h>, U/ K2 g, S& {/ m
  34. #include <linux/dma-mapping.h>
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  36. #include <mach/memory.h>( t5 P6 {3 x" m9 n( |; X
  37. #include <mach/hardware.h>
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  38. #include <mach/irqs.h>
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  39. #include <asm/hardware/edma.h>$ A& n  n( z7 @1 U
  40. $ x6 V; S- {8 y  ?
  41. #undef EDMA3_DEBUG* c! `  s0 l# W  b. J
  42. /*#define EDMA3_DEBUG*/( d  U: `% t  o2 _8 n: V7 P3 j2 ]
  43. 6 R* u, g$ H) F) k. H
  44. #ifdef EDMA3_DEBUG- h4 ]2 V4 k% A* d/ n* y
  45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS). O: U* _  |, J" D# n+ }
  46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
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  47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
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  48. #else% m/ a) w+ |/ ?) e
  49. #define DMA_PRINTK( x... )2 p3 C; f. |5 g1 m5 P+ j. K' M
  50. #define DMA_FN_IN/ X( A0 k" l2 e$ Y% A2 n- w. q5 L, z
  51. #define DMA_FN_OUT
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  52. #endif0 i! h+ e/ N5 x# \& T5 J+ Z

  53. 2 V1 G+ S* M7 \$ K/ n# `
  54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)9 |8 j/ @; K" f9 S$ M
  55. #define STATIC_SHIFT                3' R. o, |. e% d) ~, r0 s
  56. #define TCINTEN_SHIFT               20* y$ n' ~5 w5 Q+ J- y* l6 E7 U
  57. #define ITCINTEN_SHIFT              21
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  58. #define TCCHEN_SHIFT                22& ~( |6 Q  V+ i+ g9 c  n
  59. #define ITCCHEN_SHIFT               23. n6 t4 C- m2 c
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  61. static volatile int irqraised1 = 0;
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  62. static volatile int irqraised2 = 0;7 t. V, E" C* y4 [) E

  63. & f% J7 w  I. `) r8 P' G9 [! Y2 }
  64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);% z* R0 K6 F' f1 H3 w+ V
  65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);! A- G' P, N, U' O9 z
  66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);& A, B' e  i! E" M0 W
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  68. dma_addr_t dmaphyssrc1 = 0;' L+ @( G- {* t7 b9 M0 h% u
  69. dma_addr_t dmaphyssrc2 = 0;
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  70. dma_addr_t dmaphysdest1 = 0;
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  71. dma_addr_t dmaphysdest2 = 0;
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  72. , p% n: V: L: v5 e4 V% D. U% r
  73. char *dmabufsrc1 = NULL;
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  74. char *dmabufsrc2 = NULL;
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  75. char *dmabufdest1 = NULL;
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  76. char *dmabufdest2 = NULL;
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  77. 9 j: ]+ A; h* E# h2 T2 F! \2 ~
  78. static int acnt = 512;' p- `, \' y$ I# e! H0 q
  79. static int bcnt = 8;! h5 A  h$ M/ M3 f" V% u
  80. static int ccnt = 8;' S1 t* ]# R. `

  81. 6 ?2 Q) B1 h5 ~1 n2 @3 ?( G
  82. module_param(acnt, int, S_IRUGO);  \4 g+ c( `  i2 G
  83. module_param(bcnt, int, S_IRUGO);6 N5 u; |4 y! I7 d+ }, m1 [; z' t
  84. module_param(ccnt, int, S_IRUGO);
复制代码
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5 n8 ]4 }! g2 p: v+ t2 U- W# t      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6 V4 T7 Z0 w/ V  \& g  i; d
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。
+ D7 [1 E( w& K& u     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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