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LPC1788 SPI主從機(jī)代碼

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ID:440851 發(fā)表于 2018-12-6 13:19 | 只看該作者 |只看大圖 回帖獎勵 |正序瀏覽 |閱讀模式
在做LPC1788開發(fā)板的主從機(jī)開發(fā)，分享下代碼

單片機(jī)源程序如下:
  1. /**********************************************************************
  2. * $Id[        DISCUZ_CODE_1        ]nbsp;               mcu_main_new.c                        2012-05-04
  3. *//**
  4. * @file                mcu_main_new.c
  5. * @brief        User program.
  6. * @version        1.0
  7. * @date                04. May. 2012
  8. * @author        NXP MCU SW Application Team
  9. *
  10. * Copyright(C) 2011, NXP Semiconductor
  11. * All rights reserved.
  12. *
  13. ***********************************************************************
  14. * Software that is described herein is for illustrative purposes only
  15. * which provides customers with programming information regarding the
  16. * products. This software is supplied "AS IS" without any warranties.
  17. * NXP Semiconductors assumes no responsibility or liability for the
  18. * use of the software, conveys no license or title under any patent,
  19. * copyright, or mask work right to the product. NXP Semiconductors
  20. * reserves the right to make changes in the software without
  21. * notification. NXP Semiconductors also make no representation or
  22. * warranty that such application will be suitable for the specified
  23. * use without further testing or modification.
  24. * Permission to use, copy, modify, and distribute this software and its
  25. * documentation is hereby granted, under NXP Semiconductors'
  26. * relevant copyright in the software, without fee, provided that it
  27. * is used in conjunction with NXP Semiconductors microcontrollers.  This
  28. * copyright, permission, and disclaimer notice must appear in all copies of
  29. * this code.
  30. **********************************************************************/

  32. #include "includes.h"

  34. #define VTOR_OFFSET         (0x00001000)

  36. SBL_FirmVerion_Type firm_vers __attribute__((section("firmware_id_section")))= {0,1,'b'};

  38. /************************** PRIVATE DEFINITIONS *************************/
  39. #ifdef __MCU_LPC17xx
  40. #define MCB_1700
  41. //#define IAR_LPC_1768
  42. #elif defined (__MCU_LPC11xx)
  43. #define MCB_1100
  44. #endif

  46. #if defined (MCB_1700)
  47. /* Number of user LEDs */
  48. #define LED_NUM     4
  49. const unsigned long led_mask[] = { 1<<3, 1<<4, 1<<5, 1<<6 };
  50. #elif defined(MCB_1100)
  51. #define LED_NUM     4
  52. const unsigned long led_pin[] = { 3, 4, 5, 6 };
  53. #endif

  55. /************************** PRIVATE VARIABLES *************************/
  56. /* SysTick Counter */
  57. volatile unsigned long SysTickCnt;

  59. /************************** PRIVATE FUNCTIONS *************************/
  60. void SysTick_Handler (void);
  61. void ReAllocateNVIC(void);

  63. /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
  64. /*********************************************************************//**
  65. * @brief            SysTick handler sub-routine (1ms)
  66. * @param[in]        None
  67. * @return           None
  68. **********************************************************************/
  69. void SysTick_Handler (void) {
  70.   SysTickCnt++;
  71. }

  73. /*-------------------------PRIVATE FUNCTIONS------------------------------*/
  74. /*********************************************************************//**
  75. * @brief            Re-allocate vector interrupt table
  76. * @param[in]        None
  77. * @return           int
  78. **********************************************************************/
  79. void ReAllocateNVIC(void)
  80. {
  81. #ifdef __MCU_LPC17xx
  82.     __disable_irq();
  83.     NVIC_SetVTOR(VTOR_OFFSET);
  84.     __enable_irq();
  85. #elif defined (__MCU_LPC11xx)
  86.     uint32_t* src,*dst;
  87.     int32_t size;

  89.     __disable_irq();
  90.     // copy vector table
  91.     src = (uint32_t*)VTOR_OFFSET;
  92.     dst = (uint32_t*)0x10000000;
  93.     size = 192;

  95.     while(size > 0)
  96.     {
  97.         *dst++ = *src++;
  98.         size -= 4;
  99.     }
  100.      LPC_SYSCON->SYSMEMREMAP = 0x1;    /* remap to internal RAM */
  101.     __enable_irq();
  102. #endif
  103. }
  104. /*-------------------------MAIN FUNCTION------------------------------*/
  105. /*********************************************************************//**
  106. * @brief          c_entry: Main program body
  107. * @param[in]      None
  108. * @return         None
  109. **********************************************************************/
  110. void c_entry(void)
  111. {   
  112.     int num = 0;
  113.     uint32_t systickcnt;
  114.     SBL_SlaveInit();

  116.     /* Relocate NVIC */
  117.     ReAllocateNVIC();

  119.     SystemCoreClockUpdate();
  120.     SysTick_Config(SystemCoreClock/1000 - 1); /* Generate interrupt each 1 ms   */

  122. #if defined (MCB_1700)
  123.     GPIO_SetDir(2, 0x0000007C, 1);           /* LEDs on PORT2 defined as Output    */
  124.     GPIO_ClearValue(2, 0x0000007C);
  125. #elif defined(MCB_1100)
  126.     for(num = LED_NUM-1;num>=0;num--)
  127.     {
  128.         GPIO_SetDir(2, led_pin[num],1);
  129.         GPIO_SetValue(2, led_pin[num]);
  130.     }
  131. #elif defined(IAR_LPC_1768)
  132.     GPIO_SetDir(1, (1<<25), 1);
  133.     GPIO_ClearValue(1, (1<<25));
  134. #endif

  136.     while(1)
  137.     {
  138.         if(SBL_SlaveCmdRecv())
  139.         {
  140.             SBL_SlaveCmdHandler(SBL_SlaveGetRecvCmd());
  141.         }
  142.         else
  143.         {
  144.             if(((SysTickCnt - systickcnt) < 500))
  145.             {
  146. #if defined (MCB_1700)
  147.                 for(num = LED_NUM-1;num>=0;num--)
  148.                     GPIO_SetValue(2, led_mask[num]);
  149. #elif defined(MCB_1100)   
  150.                 for(num = LED_NUM-1;num>=0;num--)
  151.                     GPIO_SetValue(2, led_pin[num]);
  152. #else
  153.                   GPIO_SetValue(2,(1<<25));
  154. #endif
  155.             }
  156.             else if(((SysTickCnt - systickcnt) < 1000))
  157.             {
  158. #ifdef MCB_1700              
  159.                 for(num = LED_NUM-1;num>=0;num--)
  160.                     GPIO_ClearValue(2, led_mask[num]);
  161. #elif defined(MCB_1100)   
  162.                 for(num = LED_NUM-1;num>=0;num--)
  163.                     GPIO_ClearValue(2, led_pin[num]);
  164. #else
  165.                 GPIO_ClearValue(1,(1<<25));
  166. #endif   
  167.             }
  168.             else
  169.             {
  170.                  systickcnt = SysTickCnt;
  171.             }
  172.         }
  173.         
  174.     }
  175.     //SBL_DeInit();
  176. }

  178. /* With ARM and GHS toolsets, the entry point is main() - this will
  179.    allow the linker to generate wrapper code to setup stacks, allocate
  180.    heap area, and initialize and copy code and data segments. For GNU
  181.    toolsets, the entry point is through __start() in the crt0_gnu.asm
  182.    file, and that startup code will setup stacks and data */
  183. int main(void)
  184. {
  185.     c_entry();
  186.     return 0;
  187. }
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所有資料51hei提供下載:
AN11257.zip (637.92 KB, 下載次數(shù): 11)


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