4, Timer T1 through the query mode control LED1 periodic flashing (rotation mode)

Timer T1 control LED1 periodic flicker via query mode

1 /****************************************************************************2 * File name: main.c3 * Author: Amo [www.amoMcu.com single chip microcomputer]4 * Revision: 2014-04-085 * Version: 1.06 * Description: Timer T1 control LED1 periodic flicker via query mode7 ****************************************************************************/8#include <ioCC2540.h>9 Tentypedef unsignedCharUchar; Onetypedef unsignedint  UINT; A  - #defineLED1 P1_0//P1.0 Port Control LED1 -  the /**************************************************************************** - * Name: initled () - * Function: Set the corresponding IO port of the LED lamp - * Entry parameters: None + * Export parameters: None - ****************************************************************************/ + voidInitled (void) A { atP1dir |=0x01;//P1.0 defined as output -LED1 =0;//turn off the LED1 lamp by default - } -  - /**************************************************************************** - * Name: InitT1 () in * Function: Timer initialization, the system does not configure the operating clock by default is 2, that is, 16MHz - * Entry parameters: None to * Export parameters: None + ****************************************************************************/ - voidInitT1 () the { *T1ctl =0x0d;//128-way, auto reload 0x0000-0xffff $t1stat=0x21;//Channel 0, Interrupt activePanax Notoginseng } -  the /**************************************************************************** + * Program Entry function A ****************************************************************************/ the voidMainvoid) + { -Uchar count=0; $      $Initled ();//Call initialization function - InitT1 (); -      the      while(1) -     {Wuyi         if(IRCON >0) the         {  -ircon=0; Wu             if(count++ >=1)//about 1s periodic flashing, oscilloscope measurement of about 1025MS -             { AboutCount=0; $LED1 =! LED1;//LED1 Flashing -             } -         }  -     } A}

The cc254x T1 timer (16-bit) requires configuration of three registers T1ctl, T1stat, IRCON:

So the configuration is as follows:

27/****************************************************************************28 * Name    : InitT1 () 29 *    Energy: Timer initialization, the system does not configure the working clock by default is 2, that is, 16MHZ30 * Entry parameters: No 31 * Export parameters: No 32 ************************************************************ /33 void InitT1 () {     t1ctl = 0x0d;       128 frequency, automatic reloading 0x0000-0xffff     t1stat= 0x21;       Channel 0, interrupt valid   37}

Do not use interrupts can rotation ircon, when the Timer 1 interrupt is set to 1, rotation need to manually clear 0 (using the Interrupt subroutine will automatically clear 0)

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4, Timer T1 through the query mode control LED1 periodic flashing (rotation mode)