ew_systick.c

00001 //*****************************************************************************
00002 //   +--+       
00003 //   | ++----+   
00004 //   +-++    |  
00005 //     |     |  
00006 //   +-+--+  |   
00007 //   | +--+--+  
00008 //   +----+    Copyright (c) 2009 Code Red Technologies Ltd. 
00009 //
00010 // ew_systick.c provided SysTick functions for use by EasyWeb port to RDB1768
00011 //
00012 // Software License Agreement
00013 // 
00014 // The software is owned by Code Red Technologies and/or its suppliers, and is 
00015 // protected under applicable copyright laws.  All rights are reserved.  Any 
00016 // use in violation of the foregoing restrictions may subject the user to criminal 
00017 // sanctions under applicable laws, as well as to civil liability for the breach 
00018 // of the terms and conditions of this license.
00019 // 
00020 // THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
00021 // OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
00022 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
00023 // USE OF THIS SOFTWARE FOR COMMERCIAL DEVELOPMENT AND/OR EDUCATION IS SUBJECT
00024 // TO A CURRENT END USER LICENSE AGREEMENT (COMMERCIAL OR EDUCATIONAL) WITH
00025 // CODE RED TECHNOLOGIES LTD. 
00026 
00027 #include <mbed.h>
00028 
00029 extern void TCPClockHandler(void);
00030 
00031 volatile uint32_t TimeTick = 0;
00032 volatile uint32_t TimeTick2 = 0;
00033 
00034 
00035 // ****************
00036 //  SysTick_Handler
00037 void SysTick_Handler(void)
00038 {
00039     TimeTick++;        // Increment first SysTick counter
00040     TimeTick2++;    // Increment second SysTick counter
00041     
00042     // After 100 ticks (100 x 10ms = 1sec)
00043     if (TimeTick >= 100) {
00044       TimeTick = 0;    // Reset counter
00045       LPC_GPIO1->FIOPIN ^= 1 << 25;    // Toggle user LED
00046     }
00047     // After 20 ticks (20 x 10ms = 1/5sec)
00048     if (TimeTick2 >= 20) {
00049       TimeTick2 = 0; // Reset counter
00050       TCPClockHandler();  // Call TCP handler
00051     }  
00052 }
00053 
00054 // ****************
00055 // Setup SysTick Timer to interrupt at 10 msec intervals
00056 void Start_SysTick10ms(void)
00057 {
00058     if (SysTick_Config(SystemCoreClock / 100)) { 
00059         while (1);  // Capture error
00060     }
00061 }