向各位大神请教一下,我想实现用cc1310开启定时器定时执行某个任务,定时器相关配置设置怎么弄?又可以参考的例子吗,谢谢了!
xin wang22:
http://www.deyisupport.com/question_answer/wireless_connectivity/f/45/t/114594.aspx
Maka Luo:
clock_CC1310_LAUNCHXL_TI_CC1310F128
TI RTOS for CC13XX and CC26XX 下的Clock例程。
jad json:
回复 Maka Luo:
Int main() {/* Construct BIOS Objects */Clock_Params clkParams;/* Call board init functions */Board_initGeneral();Clock_Params_init(&clkParams);clkParams.period = 5000/Clock_tickPeriod;clkParams.startFlag = TRUE;/* Construct a periodic Clock Instance */Clock_construct(&clk0Struct, (Clock_FuncPtr)clk0Fxn,5000/Clock_tickPeriod, &clkParams);clkParams.period = 0;clkParams.startFlag = FALSE;/* Construct a one-shot Clock Instance */Clock_construct(&clk1Struct, (Clock_FuncPtr)clk1Fxn,11000/Clock_tickPeriod, &clkParams);clk2Handle = Clock_handle(&clk1Struct);Clock_start(clk2Handle);BIOS_start();/* does not return */return(0); }请教一下,这里的周期事件运行两次,一次性事件运行一次是怎么设置?1)定时时间间隔,在哪设置?2)如果要一直定时执行某个任务,而非只执行两次,怎么做?谢谢了
xin wang22:
回复 jad json:
没有研究clock
#include <stdlib.h>
#include <xdc/std.h>
#include <xdc/runtime/System.h>#include <ti/sysbios/BIOS.h>
#include <ti/sysbios/knl/Task.h>
#include <ti/sysbios/knl/Mailbox.h>
#include <ti/sysbios/knl/Event.h>/* Drivers */
#include <ti/drivers/rf/RF.h>
#include <ti/drivers/PIN.h>
#include <driverlib/timer.h>
#include <ti/drivers/Power.h>
#include <ti/drivers/power/PowerCC26XX.h>/* Board Header files */
#include "Board.h"PIN_Handle ledPinHandle;
PIN_State ledPinState;#define TASK_STACK_SIZE 1024
#define TASK_PRIORITY 2Hwi_Struct timerHwi;
void waitingTaskFunction(UArg arg0, UArg arg1);
static Task_Params waitingTaskParams;
Task_Struct waitingTask;
static uint8_t waitingTaskStack[TASK_STACK_SIZE];void interruptTimerA(UArg arg0)
{
uint32_t status = TimerIntStatus(GPT0_BASE, true);
PIN_setOutputValue(ledPinHandle, Board_LED3,1);if (TIMER_TIMA_TIMEOUT & status) {
TimerIntClear(GPT0_BASE, TIMER_TIMA_TIMEOUT);
}PIN_setOutputValue(ledPinHandle, Board_LED3,0);
}void timerInit(void)
{
/* Switches the peripheral power domain on */
Power_setDependency(PowerCC26XX_PERIPH_GPT0);/* Prevents the controller from going to standby */
Power_setConstraint(PowerCC26XX_SB_DISALLOW);// register ISR and enable hardware interrupt for timer
Hwi_Params params;
Hwi_Params_init(¶ms);
params.enableInt = TRUE;
Hwi_construct(&timerHwi, INT_GPT0A, &interruptTimerA, ¶ms, NULL);/* Configure the timer hardware */
TimerDisable(GPT0_BASE, TIMER_A);
TimerConfigure(GPT0_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PERIODIC | TIMER_CFG_B_PERIODIC);
TimerPrescaleSet(GPT0_BASE, TIMER_A, 255); // prescaler is 256 – 187.5 kHzTimerLoadSet(GPT0_BASE, TIMER_A, 313); // a random number
TimerIntClear(GPT0_BASE, TIMER_TIMA_TIMEOUT);
TimerIntEnable(GPT0_BASE, TIMER_TIMA_TIMEOUT);
TimerEnable(GPT0_BASE, TIMER_A);
}void WaitingTask_init(void)
{
Task_Params_init(&waitingTaskParams);
waitingTaskParams.stackSize = TASK_STACK_SIZE;
waitingTaskParams.priority = TASK_PRIORITY;
waitingTaskParams.stack = &waitingTaskStack;
Task_construct(&waitingTask, waitingTaskFunction, &waitingTaskParams, NULL);
}void waitingTaskFunction(UArg arg0, UArg arg1)
{
timerInit();for (;;) {
Task_sleep(30 *1000 / Clock_tickPeriod); // 30 ms wait
PIN_setOutputValue(ledPinHandle, Board_LED2, 1);
PIN_setOutputValue(ledPinHandle, Board_LED2, 0);
}
}int main(void)
{
Board_initGeneral();ledPinHandle = PIN_open(&ledPinState, BoardGpioInitTable);
if (!ledPinHandle) {
System_abort("Error initializing board LED pins\n");
}WaitingTask_init();
BIOS_start();
return (0);}
亲测可用,而且更加直观
jad json:
回复 xin wang22:
好的,多谢大侠,我看看!
jad json:
回复 xin wang22:
有些地方不太明白什么意思,可否解释一下?1)在for循环里面,是每隔30ms让led2亮灭一下吗?2)timeInit()定时器初始化之后,定时器进入中断是让led3亮灭一下吗?3)TimerPrescaleSet(GPT0_BASE, TIMER_A, 255); // prescaler is 256 – 187.5 kHz
TimerLoadSet(GPT0_BASE, TIMER_A, 313); // a random number
这两句的作用是什么?
4)定时器定时时间间隔怎么设置?
谢谢了
xin wang22:
回复 jad json:
TimerConfigure(GPT0_BASE, TIMER_CFG_SPLIT_PAIR | TIMER_CFG_A_PERIODIC | TIMER_CFG_B_PERIODIC);
TimerPrescaleSet(GPT0_BASE, TIMER_A, 255); // prescaler is 256 – 187.5 kHz
TimerLoadSet(GPT0_BASE, TIMER_A, 313); // a random number这三句决定了计时时间,分别是模式、分频、计时初值
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