[26] | 1 | /*
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| 2 | * TOPPERS/JSP Kernel
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| 3 | * Toyohashi Open Platform for Embedded Real-Time Systems/
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| 4 | * Just Standard Profile Kernel
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| 5 | *
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| 6 | * Copyright (C) 2000-2003 by Embedded and Real-Time Systems Laboratory
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| 7 | * Toyohashi Univ. of Technology, JAPAN
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| 8 | * Copyright (C) 2003 by Advanced Data Controls, Corp
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| 9 | * Copyright (C) 2004 by Embedded and Real-Time Systems Laboratory
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| 10 | * Graduate School of Information Science, Nagoya Univ., JAPAN
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| 11 | * 2009 by Suikan
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| 12 | *
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| 13 | * ä¸è¨èä½æ¨©è
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| 14 | ã¯ï¼ä»¥ä¸ã® (1)ã(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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| 15 | * ã«ãã£ã¦å
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| 16 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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| 17 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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| 18 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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| 19 | å¸ï¼ä»¥ä¸ï¼
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| 20 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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| 21 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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| 22 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
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| 23 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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| 24 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 25 | * ç¨ã§ããå½¢ã§åé
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| 26 | å¸ããå ´åã«ã¯ï¼åé
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| 27 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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| 28 | * è
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| 29 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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| 30 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 31 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 32 | * ç¨ã§ããªãå½¢ã§åé
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| 33 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
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| 34 | * ã¨ï¼
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| 35 | * (a) åé
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| 36 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 37 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 38 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 39 | * (b) åé
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| 40 | å¸ã®å½¢æ
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| 41 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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| 42 | * å ±åãããã¨ï¼
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| 43 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 44 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 45 | ããã³TOPPERSããã¸ã§ã¯ããå
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| 46 | 責ãããã¨ï¼
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| 47 | *
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| 48 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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| 49 | ã
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| 50 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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| 51 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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| 52 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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| 53 | *
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| 54 | */
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| 55 |
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| 56 | /*
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| 57 | * ã¿ã¼ã²ããã·ã¹ãã ä¾åã¢ã¸ã¥ã¼ã«ï¼CQ-FRK-NXP-ARMï¼
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| 58 | */
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| 59 |
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| 60 | #include "jsp_kernel.h"
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| 61 | #include <lpc2388.h>
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| 62 |
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| 63 |
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| 64 |
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| 65 | /*
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| 66 | * OSCã®åæå(ã·ã¹ãã åºæ). 4MHz ã®å
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| 67 | é¨ãªã·ã¬ã¼ã¿ã使ã
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| 68 | */
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| 69 | static void
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| 70 | init_clock()
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| 71 | {
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| 72 | /* 1. ããPLLã使ç¨ãã¦ãããªãããã£ã¹ã³ãã¯ããããã£ã¼ãã»ã·ã¼ã±ã³ã¹ãè¸ã */
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| 73 | PLLCON &= 0xFFFFFFFD; /* Clear bit 1, PLL bypassed */
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| 74 | PLLFEED = 0xAA;
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| 75 | PLLFEED = 0x55;
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| 76 |
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| 77 | /* 2. PLLããã£ã»ã¼ãã«ãããã£ã¼ãã»ã·ã¼ã±ã³ã¹ãè¸ãã */
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| 78 | PLLCON = 0; /* Disable PLL */
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| 79 | PLLFEED = 0xAA;
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| 80 | PLLFEED = 0x55;
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| 81 |
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| 82 | /* 3. CPUã¯ããã¯ã»ãã£ãã¤ãã®è¨å®ããPLLãªãã§ãé
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| 83 | ããªããããªãããã«è¨å®ããã */
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| 84 | CCLKCFG = 0; /* CCLK = PCLK / 1 */
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| 85 |
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| 86 | /* 4. PLLã®ã¯ããã¯ã½ã¼ã¹ãå¤æ´ããã */
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| 87 | CLKSRCSEL = 0; /* Select 4MHz internal oscillator*/
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| 88 | // CLKSRCSEL = 1; /* Select 12MHz main oscillator*/
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| 89 |
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| 90 | /* 5. PLLCFGã¸ã®æ¸ãè¾¼ã¿ãè¡ãããã£ã¼ãã»ã·ã¼ã±ã³ã¹ãè¸ãã§æå¹åããã
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| 91 | * PLLCFGã¯ãPLLããã£ã»ã¼ãã«ã®ã¨ãã«ã ãå¤æ´ã§ããã */
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| 92 | PLLCFG = 35; /* Divide by 1, Multiply by 72, PCLK = 4*72 = 288MHz */
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| 93 | // PLLCFG = 11; /* Divide by 1, Multiply by 24, PCLK = 12*24 = 288MHz */
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| 94 | PLLFEED = 0xAA;
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| 95 | PLLFEED = 0x55;
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| 96 |
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| 97 | /* 6. PLLãã¤ãã¼ãã«ã«ãããã£ã¼ãã»ã·ã¼ã±ã³ã¹ãè¸ã. */
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| 98 | PLLCON = 1; /* Enable PLL */
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| 99 | PLLFEED = 0xAA;
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| 100 | PLLFEED = 0x55;
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| 101 |
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| 102 | /* 7. CPUã¯ããã¯ã»ãã£ãã¤ãã®å¤ããPLLåä½ç¨ã«å¤æ´ããã
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| 103 | * ããã¯å¿
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| 104 | ããPLLãã¯ããã¯æºã¨ãã¦æ¥ç¶ããåã«è¡ãã */
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| 105 | CCLKCFG = 3; /* CCLK = PCLK/4 = 288/4 = 72MHz */
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| 106 |
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| 107 | /* 8. PLLSTATã¬ã¸ã¹ã¿ã®PLOCK bitã調ã¹ã¦ãPLLãããã¯ããã¾ã§å¾
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| 108 | ã¤ã
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| 109 | * ãããã¯PLOCKå²ãè¾¼ã¿ã使ç¨ãã¦ãããããããã¯ãPLLã®å
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| 110 | ¥åã¯ããã¯ãå°ãã(32kHzãªã©)ãªãã
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| 111 | * åç´ã«ã¦ã§ã¤ãã»ã«ã¼ããåãã¦ãããã*/
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| 112 | while ( !(PLLSTAT & (1<<26)))
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| 113 | ;
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| 114 |
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| 115 | /* 9. PLLãã·ã¹ãã ã«æ¥ç¶ãããã£ã¼ãã·ã¼ã±ã³ã¹ãå®è¡ãã */
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| 116 | PLLCON = 3; /* Select PLL as CPU clock source */
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| 117 | PLLFEED = 0xAA;
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| 118 | PLLFEED = 0x55;
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| 119 | }
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| 120 |
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| 121 |
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| 122 |
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| 123 |
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| 124 | /*
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| 125 | * ã¿ã¼ã²ããã·ã¹ãã ä¾åã®åæå
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| 126 | */
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| 127 | void
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| 128 | sys_initialize()
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| 129 | {
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| 130 | int i;
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| 131 |
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| 132 | init_vector(); /* SRAMã®ãªããããLPC2388å
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| 133 | ±é */
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| 134 |
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| 135 | init_clock(); /* PLLã®è¨å®ãã·ã¹ãã åºæ */
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| 136 |
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| 137 | init_uart0(); /* UART0ã®åæåãã·ã¹ãã åºæ */
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| 138 |
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| 139 | init_IRQ(); /* VICãåæåãããLPC2388å
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| 140 | ±é */
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| 141 |
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| 142 | /* å¿
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| 143 | è¦ãªããªãã§ã©ã«ã®é»æºãå
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| 144 | ¥ãã(ã·ã¹ãã åºæ) */
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| 145 | /* ãªããUART0ã¨TIMER3ã¯LPC2388å
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| 146 | ±éã§å¿
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| 147 | è¦ */
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| 148 | PCONP |= 0x00800008; /* bit3:UART0, bit23:TIMER3 */
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| 149 |
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| 150 | /* UART0ã®ãã³ãè¨å® (LPC2388å
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| 151 | ±é) */
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| 152 | PINSEL0 &= ~0xF0; /* bit 4-7ã ããã¯ãªã¢ */
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| 153 | PINSEL0 |= 0x50; /* UARTå
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| 154 | ¥åºåãå²ãå½ã¦ */
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| 155 |
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| 156 | /*
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| 157 | * ARMã®ãã¯ã¿ãã¼ãã«ã¸å²è¾¼ã¿ãã³ãã©ãç»é²ï¼ã©ã®ARMv4ã·ã¹ãã ã§ãè¦æ±ãããï¼
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| 158 | */
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| 159 | arm_install_handler(IRQ_Number,IRQ_Handler);
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| 160 |
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| 161 | /*
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| 162 | * Memory Acceleration Moduleã®è¨å® ( NXP社 UM10211 chapter 7 )
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| 163 | * Flashã¡ã¢ãªã®ããªãã§ããã使ã£ã¦ããã°ã©ã å®è¡ãé«éåãã
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| 164 | */
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| 165 | MAMCR = 0; /* 念ã®ããMAMããªãã«ãã */
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| 166 | MAMTIM = 4; /* UM10211ã«ããã°ã60MHz以ä¸ã§åä½ããã¨ãã¯4ã«è¨å®ãã */
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| 167 | MAMCR = 2; /* MAMæ©è½ããªã³ã«ãã */
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| 168 |
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| 169 | }
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| 170 |
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| 171 |
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| 172 |
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| 173 |
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| 174 |
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