uc-os-II入門學(xué)習(xí)

#include
/*********************************************************************************************************
** Function name:???tickInit
** Descriptions:???Initialize uC/OS-II's tick source(system timer)，
??????????????????????????? 初始化uC/OS-II的時鐘源（系統(tǒng)定時器）
** Input parameters:??None 無
** Output parameters:??None 無
** Returned value:????? None 無???????
*********************************************************************************************************/
static? void? tickInit (void)
{
??? SysTickPeriodSet((INT32U)(SysCtlClockGet() / OS_TICKS_PER_SEC) -1 );
??? SysTickEnable();
??? SysTickIntEnable();
}
/*********************************************************************************************************
** Function name:???tickISRHandler
** Descriptions:???Timeout interrupt handler of system timer 系統(tǒng)定時器超時中斷
** Input parameters:??None 無
** Output parameters:??None 無
** Returned value:????? None 無???????
*********************************************************************************************************/
void? tickISRHandler (void)
{
??? #if OS_CRITICAL_METHOD == 3
??????? OS_CPU_SR cpu_sr;
??? #endif

??? OS_ENTER_CRITICAL();????????????????????????
??? OSIntNesting++;
??? OS_EXIT_CRITICAL();

??? OSTimeTick();?????????????????????????????????????????????????????? /*? Call uC/OS-II's OSTimeTick()*/

??? OSIntExit();????????????????????????????????
}
/******************************UART初始化***********************************************************/
void uartInit(void)
{
??? SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);????????????????? //? 使能UART模塊
??? SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);????????????????? //? 使能RX/TX所在的GPIO端口

??? GPIOPinTypeUART(GPIO_PORTA_BASE,??????????????????????? //? 配置RX/TX所在管腳為
??????????????????? GPIO_PIN_0 | GPIO_PIN_1);?????????????? //? UART收發(fā)功能

??? UARTConfigSet(UART0_BASE,?????????????????????????????? //? 配置UART端口
????????????????? 115200,???????????????????????????????????? //? 波特率：9600
????????????????? UART_CONFIG_WLEN_8 |????????????????????? //? 數(shù)據(jù)位：8
????????????????? UART_CONFIG_STOP_ONE |??????????????????? //? 停止位：1
????????????????? UART_CONFIG_PAR_NONE);??????????????????? //? 校驗位：無
? //HWREG(UART0_LCRH)=HWREG(UART0_LCRH)&0xEF;
??? UARTEnable(UART0_BASE);???????????????????????????????? //? 使能UART端口
? //HWREG(UART0_LCRH)=HWREG(UART0_LCRH)&0xEF;
}
/***********通過UART發(fā)送字符串**********************************************/
int uartPuts(int ch )
{
??? if(ch == '\n')
??? {
????? while((HWREG(UART0_FLAG)&0x8));
??? HWREG(UART0_DATA)=CR ;???????? //輸入附加的CR以使字符串被正確顯示
??????? //UARTCharPut(UART0_BASE, ch);
??? }
?? if(ch == '\r')
??? {
????? while((HWREG(UART0_FLAG)&0x8));
??? HWREG(UART0_DATA)=LF ;???????? //輸入附加的CR以使字符串被正確顯示
??????? //UARTCharPut(UART0_BASE, ch);
??? }
? while((HWREG(UART0_FLAG)&0x8));
? return (HWREG(UART0_DATA)=ch);
}
int fputc(int ch,FILE *f)
{
?? return (uartPuts(ch)) ;
}
/*********************************************************************************************************
** Function name:???targetInit
** Descriptions:???Initialize the target board 初始化目標板
** Input parameters:??None 無
** Output parameters:??None 無
** Returned value:????? None 無??????
*********************************************************************************************************/
void? targetInit (void)
{
??? #if PLL_EN == 0???????????????????????????????????????????????????? /*? Not use PLL? 不使用PLL????? */
??????? SysCtlClockSet(CCLK_DIV | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | EXT_CLK);
??????????????????????????????????????????????????????????????????????? /*? System clock=?????????????? */
??????????????????????????????????????????????????????????????????????? /*? EXT_CLK/CCLK_DIV??????????? */
??????????????????????????????????????????????????????????????????????? /*? 系統(tǒng)時鐘=EXT_CLK/CCLK_DIV?? */

??? #else?????????????????????????????????????????????????????????????? /*? Use PLL? 使用PLL??????????? */?
??????? SysCtlClockSet(CCLK_DIV | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | EXT_CLK);
??????????????????????????????????????????????????????????????????????? /*? System clock=200MHz/CCLK_DIV*/
??????????????????????????????????????????????????????????????????????? /*? 系統(tǒng)時鐘=200MHz/CCLK_DIV??? */
??? #endif
??? tickInit();???????????????????????????????????????????????????????? /*? Initialize the uC/OS-II tick*/
?uartInit();

}

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