OMAPL138如何在Linux下使用EDMA3驱动

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1. [code]EDMA sample test application
   
2. /*
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3. * edma_test.c
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4. *
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5. * brief  EDMA3 Test Application
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6. *
   
7. *   This file contains EDMA3 Test code.
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8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
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12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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14. *
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15. * This program is free software; you can redistribute it and/or
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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
    
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
    
22. * GNU General Public License for more details.
    
23. */
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24. 
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25. #include <linux/module.h>
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26. #include <linux/init.h>
    
27. #include <linux/errno.h>
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28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
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31. #include <linux/moduleparam.h>
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32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
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34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
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37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
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39. #include <asm/hardware/edma.h>
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40. 
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41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
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43. 
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44. #ifdef EDMA3_DEBUG
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45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
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__)
    
48. #else
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49. #define DMA_PRINTK( x... )
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50. #define DMA_FN_IN
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51. #define DMA_FN_OUT
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52. #endif
    
53. 
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54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
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55. #define STATIC_SHIFT                3
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56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
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59. #define ITCCHEN_SHIFT               23
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60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
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66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
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68. dma_addr_t dmaphyssrc1 = 0;
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69. dma_addr_t dmaphyssrc2 = 0;
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70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
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77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
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81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
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84. 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
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。
# {, H* F: P' {0 N4 N9 q  ^' x6 o8 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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