src/main.c

   1 /******************************************************************************
   2  * @file:    main.c
   3  * @purpose: CMSIS Cortex-M3 Core Peripheral Access Layer Source File
   4  *           Blink a LED using CM3 SysTick
   5  * @version: V1.0
   6  * @date:    22. May 2009
   7  *----------------------------------------------------------------------------
   8  *
   9  * Copyright (C) 2008 ARM Limited. All rights reserved.
  10  *
  11  * ARM Limited (ARM) is supplying this software for use with Cortex-M3
  12  * processor based microcontrollers.  This file can be freely distributed
  13  * within development tools that are supporting such ARM based processors.
  14  *
  15  * THIS SOFTWARE IS PROVIDED "AS IS".  NO WARRANTIES, WHETHER EXPRESS, IMPLIED
  16  * OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
  17  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
  18  * ARM SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR
  19  * CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
  20  *
  21  ******************************************************************************/
  22
  23 #include <board.h>
  24 #include "usb.h"
  25
  26 uint32_t msTicks;                               /* counts 1ms timeTicks */
  27 /*----------------------------------------------------------------------------
  28   SysTick_Handler
  29  *----------------------------------------------------------------------------*/
  30 void SysTick_Handler(void) {
  31   msTicks++;                                    /* increment counter necessary in Delay() */
  32 }
  33
  34 /*------------------------------------------------------------------------------
  35   delays number of tick Systicks (happens every 1 ms)
  36  *------------------------------------------------------------------------------*/
  37 __inline static void Delay (uint32_t dlyTicks) {
  38   uint32_t curTicks;
  39
  40   curTicks = msTicks;
  41   while ((msTicks - curTicks) < dlyTicks);
  42 }
  43
  44 /*------------------------------------------------------------------------------
  45   configer LED pins
  46  *------------------------------------------------------------------------------*/
  47 __inline static void LED_Config(void) {
  48
  49   GPIO1->FIODIR = (1<<29)|(1<<18);     /* LEDs on PORT1 18 & 29 are Output */
  50 }
  51
  52 /*------------------------------------------------------------------------------
  53   Switch on LEDs
  54  *------------------------------------------------------------------------------*/
  55 __inline static void LED_On (uint32_t led) {
  56
  57   GPIO1->FIOPIN |=  (led);                      /* Turn On  LED */
  58 }
  59
  60
  61 /*------------------------------------------------------------------------------
  62   Switch off LEDs
  63  *------------------------------------------------------------------------------*/
  64 __inline static void LED_Off (uint32_t led) {
  65
  66   GPIO1->FIOPIN &= ~(led);                      /* Turn Off LED */
  67 }
  68
  69 void lightshow() {
  70         while (1) {
  71                 LED_On ((1<<29));                           /* Turn on the LED. */
  72                 LED_On ((1<<18));                           /* Turn on the LED. */
  73                 Delay (100);                                /* delay  100 Msec */
  74                 LED_Off ((1<<29));                           /* Turn on the LED. */
  75                 Delay (100);                                /* delay  100 Msec */
  76                 LED_Off ((1<<18));                           /* Turn on the LED. */
  77                 LED_On ((1<<29));                           /* Turn on the LED. */
  78                 Delay (100);                                /* delay  100 Msec */
  79         }
  80 }
  81
  82 /*----------------------------------------------------------------------------
  83   MAIN function
  84  *----------------------------------------------------------------------------*/
  85 int main (void) {
  86
  87         SystemInit();   /* setup clocks */
  88
  89         if (SysTick_Config(SystemFrequency / 1000)) { /* Setup SysTick Timer for 1 msec interrupts  */
  90                 while (1);                                  /* Capture error */
  91         }
  92
  93         LED_Config();
  94
  95         VCOM_Init();                              // VCOM Initialization
  96
  97         USB_Init();                               // USB Initialization
  98
  99         USB_Connect(TRUE);                        // USB Connect
 100         //lightshow();
 101
 102         while (!USB_Configuration) ;              // wait until USB is configured
 103
 104         while (1) {                               // Loop forever
 105                 VCOM_Serial2Usb();                      // read serial port and initiate USB event
 106                 VCOM_CheckSerialState();
 107                 VCOM_Usb2Serial();
 108         } // end while
 109 }
 110