📄 app.c
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/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
*
* (c) Copyright 1998-2003, Jean J. Labrosse, Weston, FL
* All Rights Reserved
*
*
* Sample code
* File : app.c
* By : Eric Shufro
*********************************************************************************************************
*/
#include <includes.h>
/*
*********************************************************************************************************
* CONSTANTS
*********************************************************************************************************
*/
/*
*********************************************************************************************************
* VARIABLES
*********************************************************************************************************
*/
static OS_STK AppStartTaskStk[START_TASK_STK_SIZE];
static OS_STK LCD_TestTaskStk[LCD_TASK_STK_SIZE];
/*
*********************************************************************************************************
* FUNCTION PROTOTYPES
*********************************************************************************************************
*/
static void AppStartTask(void *p_arg);
static void AppTaskCreate(void);
#if OS_VIEW_MODULE > 0
static void AppTerminalRx(INT8U rx_data);
#endif
/*
*********************************************************************************************************
* main()
*
* Description : This is the standard application entry point for C code.
* Arguments : none
*********************************************************************************************************
*/
void main (void)
{
CPU_INT08U err;
BSP_IntDisAll(); /* Disable interrupts */
OSInit(); /* Initialize "uC/OS-II, The Real-Time Kernel" */
OSTaskCreateExt(AppStartTask,
(void *)0,
(OS_STK *)&AppStartTaskStk[START_TASK_STK_SIZE-1],
TASK_START_PRIO,
TASK_START_PRIO,
(OS_STK *)&AppStartTaskStk[0],
START_TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
#if OS_TASK_NAME_SIZE > 15
OSTaskNameSet(TASK_START_PRIO, "Start Task", &err);
#endif
OSStart(); /* Start multitasking (i.e. give control to uC/OS-II) */
}
/*$PAGE*/
/*
*********************************************************************************************************
* STARTUP TASK
*
* Description : This is an example of a startup task. As mentioned in the book's text, you MUST
* initialize the ticker only once multitasking has started.
* Arguments : p_arg is the argument passed to 'AppStartTask()' by 'OSTaskCreate()'.
* Notes : 1) The first line of code is used to prevent a compiler warning because 'p_arg' is not
* used. The compiler should not generate any code for this statement.
* 2) Interrupts are enabled once the task start because the I-bit of the CCR register was
* set to 0 by 'OSTaskCreate()'.
*********************************************************************************************************
*/
static void AppStartTask (void *p_arg)
{
CPU_INT32U i;
CPU_INT32U j;
(void)p_arg;
BSP_Init(); /* Initialize the ticker, and other BSP related functions */
#if OS_TASK_STAT_EN > 0
OSStatInit();
#endif
#if OS_VIEW_MODULE > 0
OSView_Init(38400); /* OSView Init, baud rate = 38400 */
OSView_TerminalRxSetCallback(AppTerminalRx);
OSView_RxIntEn(); /* Enable Rx Interrupts */
#endif
#ifdef DISP_MODULE_PRESENT
DispInit(2, 16); /* Initialize the LCD module */
#endif
AppTaskCreate();
while (TRUE) { /* Task body, always written as an infinite loop */
for (j = 0; j < 4; j++) {
for (i = 1; i <= 8; i++) {
LED_On(i);
OSTimeDlyHMSM(0, 0, 0, 10);
LED_Off(i);
OSTimeDlyHMSM(0, 0, 0, 10);
}
for (i = 7; i >= 2; i--) {
LED_On(i);
OSTimeDlyHMSM(0, 0, 0, 10);
LED_Off(i);
OSTimeDlyHMSM(0, 0, 0, 10);
}
}
for (i = 0; i < 4; i++) {
LED_On(0);
OSTimeDlyHMSM(0, 0, 0, 40);
LED_Off(0);
OSTimeDlyHMSM(0, 0, 0, 40);
}
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* LCD Test Task
*
* Description: This task displays messages on the Keil MC2300 EVB (16x2) LCD screen
*********************************************************************************************************
*/
#ifdef DISP_MODULE_PRESENT
static void LCD_TestTask (void *p_arg)
{
CPU_INT08S i;
CPU_INT32U CPUFrq;
CPU_INT08U tempStr[17];
CPU_INT08U WelcomeMsg[7][17] = {{" Welcome to "},
{" Micrium "},
{"This demo runs: "},
{"uC/OS-II, "},
{"uC/OS-View and, "},
{"uC/LCD on a NXP "},
{"LPC2378 CPU. "}};
CPU_INT08U aboutStr[] = {"Did you know that uC/OS-II is a "
"real-time pre-emptive "
"multitasking kernel that provides "
"services such as task delay "
"functionality, semaphores, message "
"mailbox's, timers, event flags, "
"memory management, mutex's, and "
"queues. Visit Micrium online by "
"browsing to www.micrium.com for "
"more information."};
CPU_INT08U *aboutStrPtr; /* Declare a pointer to aboutStr, used for scroll effect */
while (TRUE) { /* All tasks bodies include an infinite loop */
DispClrScr(); /* Start by clearing the screen */
DispStr(0, 0, WelcomeMsg[0]); /* Display "Welcome to" on line 0 of the LCD */
DispStr(1, 0, WelcomeMsg[1]); /* Display "Micrium" on line 1 of the LCD */
OSTimeDlyHMSM(0, 0, 3, 0); /* Wait a while before proceeding */
DispStr(0, 0, WelcomeMsg[2]); /* Display "This demo runs:" on line 0 of the LCD */
for (i = 3; i <= 5; i++) {
DispStr(1, 0, WelcomeMsg[i]); /* Display Messages 3-5 on line 1 of the lCD */
OSTimeDlyHMSM(0, 0, 3, 0); /* Wait a while before proceeding */
}
DispClrScr(); /* Clear the screen */
DispStr(1, 0, WelcomeMsg[6]); /* Display Messages 6 on line 1 of the lCD */
OSTimeDlyHMSM(0, 0, 3, 0); /* Wait a while before proceeding */
OSTimeDlyHMSM(0, 0, 3, 0); /* Wait a while before proceeding */
DispClrScr(); /* Clear the screen */
DispStr(0, 0, "Clock Config:"); /* Display "System Settings:" on line 0 of the LCD */
CPUFrq = BSP_CPU_ClkFreq(); /* Get the CPU Frequency in Hz */
CPUFrq /= 1000000; /* Convert the CPU Frequency to MHz */
sprintf((char *)tempStr, "CPU Frq: %ldMHz", CPUFrq); /* Create the string "CPU Frq: xxMHz" */
DispStr(1, 0, tempStr); /* Display "CPU Frq: xxMHz" on line 1 of the LCD */
OSTimeDlyHMSM(0, 0, 3, 0); /* Wait a while before proceeding */
DispClrScr(); /* Clear the screen */
aboutStrPtr = aboutStr; /* Point to the start of the about message string */
/* Start scrolling from right to left. This involves */
/* starting from the last column and working toward the */
/* first column until the screen fills up. The remaining */
/* characters may start from position 0. */
for (i = 15; i >= 0; i--) { /* For the first 16 characters... */
if (*aboutStrPtr != '\0') { /* If we have not reached the end of the string */
DispStr(0, i, aboutStrPtr); /* Display (col i - distance to end of lcd line) # of chars */
OSTimeDlyHMSM(0, 0, 0, 200); /* Delay before updating the screen with the shifted msg */
}
}
while ((aboutStr + sizeof(aboutStr) - aboutStrPtr) > 16) { /* While there are greater than 16 chars left to display */
DispStr(0, 0, aboutStrPtr++); /* Display 16 chars and increment (shift) message by 1 char */
OSTimeDlyHMSM(0, 0, 0, 200); /* Delay before displaying the shifted message */
}
for (i = 15; i >= 0; i--) { /* For the last 16 characters */
if (*aboutStrPtr != '\0') { /* If we have not reached the end of the string */
DispStr(0, 0, aboutStrPtr++); /* Display (col i - distance to end of lcd line) # of chars */
DispChar(0, i, ' '); /* Leave spaces chars behind as the str scrolls off screen */
OSTimeDlyHMSM(0, 0, 0, 200); /* Delay before updating the screen with the shifted msg */
}
}
}
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* CREATE APPLICATION TASKS
*
* Description : none
* Arguments : none
* Notes : none
*********************************************************************************************************
*/
static void AppTaskCreate (void)
{
INT8U err;
#ifdef DISP_MODULE_PRESENT
OSTaskCreateExt(LCD_TestTask,
(void *)0,
(OS_STK *)&LCD_TestTaskStk[LCD_TASK_STK_SIZE-1],
LCD_TEST_TASK_PRIO,
LCD_TEST_TASK_PRIO,
(OS_STK *)&LCD_TestTaskStk[0],
LCD_TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskNameSet(LCD_TEST_TASK_PRIO, "LCD Test Task", &err);
#endif
}
/*
*********************************************************************************************************
* uC/OS-View TERMINAL WINDOW CALLBACK
*********************************************************************************************************
*/
#if OS_VIEW_MODULE > 0
static void AppTerminalRx (INT8U rx_data)
{
}
#endif
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