📄 app.c
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/*
*********************************************************************************************************
* EXAMPLE CODE
*
* (c) Copyright 2003-2006; Micrium, Inc.; Weston, FL
*
* All rights reserved. Protected by international copyright laws.
* Knowledge of the source code may NOT be used to develop a similar product.
* Please help us continue to provide the Embedded community with the finest
* software available. Your honesty is greatly appreciated.
*********************************************************************************************************
*/
/*
*********************************************************************************************************
*
* EXAMPLE CODE
*
* Luminary Micro LM3S811
* with the
* LM3S811 Evaluation Kit
*
* Filename : app.c
* Version : V1.00
* Programmer(s) : Brian Nagel
*********************************************************************************************************
*/
#include <includes.h>
void __error__(char *pcFilename, unsigned long ulLine)
{
;
}
/*
*********************************************************************************************************
* CONSTANTS
*********************************************************************************************************
*/
#define APP_TASK_OLED_WIDTH 20
/*
*********************************************************************************************************
* VARIABLES
*********************************************************************************************************
*/
static OS_STK AppTaskStartStk[APP_TASK_START_STK_SIZE];
static OS_STK AppTaskUserIFStk[APP_TASK_USER_IF_STK_SIZE];
static CPU_INT16U AppUserIF_Scroll;
/*
*********************************************************************************************************
* FUNCTION PROTOTYPES
*********************************************************************************************************
*/
static void AppTaskCreate (void);
static void AppTaskStart (void *p_arg);
static void AppTaskUserIF (void *p_arg);
static void AppDispScr_SignOn (void);
static void AppDispScr_VersionTickRate (void);
static void AppDispScr_CPU (void);
static void AppDispScr_CtxSw (void);
static void AppFormatDec (CPU_INT08U *s, CPU_INT32U value, CPU_INT08U digits);
/*
*********************************************************************************************************
* main()
*
* Description : This is the standard entry point for C code. It is assumed that your code will call
* main() once you have performed all necessary CPU and C initialization.
* Arguments : none
*********************************************************************************************************
*/
void main (void)
{
CPU_INT08U err;
BSP_IntDisAll(); /* Disable all interrupts until we are ready to accept them */
OSInit(); /* Initialize "uC/OS-II, The Real-Time Kernel" */
OSTaskCreateExt(AppTaskStart, /* Create the start task */
(void *)0,
(OS_STK *)&AppTaskStartStk[APP_TASK_START_STK_SIZE - 1],
APP_TASK_START_PRIO,
APP_TASK_START_PRIO,
(OS_STK *)&AppTaskStartStk[0],
APP_TASK_START_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
#if OS_TASK_NAME_SIZE > 13
OSTaskNameSet(APP_TASK_START_PRIO, "Start Task", &err);
#endif
OSStart(); /* Start multitasking (i.e. give control to uC/OS-II) */
}
/*$PAGE*/
/*
*********************************************************************************************************
* STARTUP TASK
*
* Description : This is an example of a startup task. As mentioned in the book's text, you MUST
* initialize the ticker only once multitasking has started.
* Arguments : p_arg is the argument passed to 'AppStartTask()' by 'OSTaskCreate()'.
* Notes : 1) The first line of code is used to prevent a compiler warning because 'p_arg' is not
* used. The compiler should not generate any code for this statement.
* 2) Interrupts are enabled once the task start because the I-bit of the CCR register was
* set to 0 by 'OSTaskCreate()'.
*********************************************************************************************************
*/
static void AppTaskStart (void *p_arg)
{
(void)p_arg;
BSP_Init(); /* Initialize BSP functions */
#if OS_TASK_STAT_EN > 0
OSStatInit(); /* Determine CPU capacity */
#endif
AppUserIF_Scroll = 0;
AppTaskCreate(); /* Create application tasks */
while (DEF_TRUE) { /* Task body, always written as an infinite loop. */
LED_Toggle(1);
OSTimeDly(OS_TICKS_PER_SEC / 4);
}
}
/*
*********************************************************************************************************
* USER INTERFACE TASK
*********************************************************************************************************
*/
static void AppTaskUserIF (void *p_arg)
{
CPU_INT32U state;
(void)p_arg;
AppDispScr_SignOn(); /* Display 'sign on' message */
OSTimeDly(OS_TICKS_PER_SEC);
state = 1;
while (DEF_TRUE) { /* Task body, always written as an infinite loop. */
AppUserIF_Scroll = ADC_GetStatus(1) >> 5;
if (PB_GetStatus(1) == DEF_TRUE) {
if (state == 3) {
state = 0;
} else {
state++;
}
}
switch (state) {
case 1:
AppDispScr_VersionTickRate();
break;
case 2:
AppDispScr_CPU();
break;
case 3:
AppDispScr_CtxSw();
break;
case 0:
default:
AppDispScr_SignOn();
break;
}
OSTimeDlyHMSM(0, 0, 0, 200);
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* CREATE APPLICATION TASKS
*********************************************************************************************************
*/
static void AppTaskCreate (void)
{
CPU_INT08U err;
OSTaskCreateExt(AppTaskUserIF,
(void *)0,
(OS_STK *)&AppTaskUserIFStk[APP_TASK_USER_IF_STK_SIZE - 1],
APP_TASK_USER_IF_PRIO,
APP_TASK_USER_IF_PRIO,
(OS_STK *)&AppTaskUserIFStk[0],
APP_TASK_USER_IF_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
#if OS_TASK_NAME_SIZE > 13
OSTaskNameSet(APP_TASK_USER_IF_PRIO, "User I/F", &err);
#endif
}
/*
*********************************************************************************************************
* DISPLAY SCREENS
*********************************************************************************************************
*/
static void AppDispScr_SignOn (void)
{
CPU_INT08U s1[APP_TASK_OLED_WIDTH + 1];
CPU_INT08U s2[20];
CPU_INT08U i;
OS_StrCopy(s1, "Micrium uC/OS-II ");
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 0);
OS_StrCopy(s1, " ARM Cortex-M3 ");
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 1);
}
static void AppDispScr_VersionTickRate (void)
{
CPU_INT08U s1[APP_TASK_OLED_WIDTH + 1];
CPU_INT08U s2[20];
CPU_INT08U i;
CPU_INT32U value;
OS_StrCopy(s1, "uC/OS-II: Vx.yy ");
value = (CPU_INT32U)OSVersion();
s1[12] = value / 100 + '0';
s1[14] = (value % 100) / 10 + '0';
s1[15] = (value % 10) + '0';
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 0);
OS_StrCopy(s1, "TickRate: xxx Hz ");
value = (CPU_INT32U)OS_TICKS_PER_SEC;
AppFormatDec(&s1[10], value, 3);
s1[13] = ' '; /* Account for behavior of AppFormatDec */
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 1);
}
static void AppDispScr_CPU (void)
{
CPU_INT08U s1[APP_TASK_OLED_WIDTH + 1];
CPU_INT08U s2[20];
CPU_INT08U i;
CPU_INT32U value;
#if OS_TASK_STAT_EN > 0
OS_StrCopy(s1, "CPU Usage: xx % ");
value = (CPU_INT32U)OSCPUUsage;
s1[11] = (value / 10) + '0';
s1[12] = (value % 10) + '0';
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 0);
#endif
OS_StrCopy(s1, "CPU Speed: xxMHz ");
value = (CPU_INT32U)SysCtlClockGet() / 1000000L;
s1[11] = (value / 10) + '0';
s1[12] = (value % 10) + '0';
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 1);
}
static void AppDispScr_CtxSw (void)
{
CPU_INT08U s1[APP_TASK_OLED_WIDTH + 1];
CPU_INT08U s2[20];
CPU_INT08U i;
CPU_INT32U value;
#if OS_TIME_GET_SET_EN > 0
OS_StrCopy(s1, "#Ticks: xxxxxxxx ");
value = (CPU_INT32U)OSTime;
AppFormatDec(&s1[8], value, 8);
s1[16] = ' '; /* Account for behavior of AppFormatDec */
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 0);
#endif
OS_StrCopy(s1, "#CtxSw: xxxxxxxx ");
value = (CPU_INT32U)OSCtxSwCtr;
AppFormatDec(&s1[8], value, 8);
s1[16] = ' '; /* Account for behavior of AppFormatDec */
for (i = 0; i < 16; i++) {
s2[i] = s1[(i + AppUserIF_Scroll) % APP_TASK_OLED_WIDTH];
}
OSRAMStringDraw((char const *)s2, 0, 1);
}
/*
*********************************************************************************************************
* FORMAT A DECIMAL VALUE
*
* Description: This function converts a decimal value to ASCII (with leading zeros)
*
* Arguments : s is a pointer to the destination ASCII string
* value is the value to convert (assumes an unsigned value)
* digits is the desired number of digits
*********************************************************************************************************
*/
static void AppFormatDec (CPU_INT08U *s, CPU_INT32U value, CPU_INT08U digits)
{
CPU_INT08U i;
CPU_INT32U mult;
mult = 1;
for (i = 0; i < (digits - 1); i++) {
mult *= 10;
}
while (mult > 0) {
*s++ = value / mult + '0';
value %= mult;
mult /= 10;
}
*s = 0;
}
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