Posted on May 22, 2007 at 17:19Hello,
I am struggling to get a timebase timer to work on an STR735. The processor is running (verified through flashing LED's). I need a timer on a 500 millisecond timebase to schedule activities. The following steps have been done with no success:
In Main initialisation:
Use Timer Base with End Of Count Interrupt
------------------------------------------------------------------------------*/
/* TB2 Clock Enable */
CFG_PeripheralClockConfig(CFG_CLK_TB2 , ENABLE);
/* EIC Clock Enable */
CFG_PeripheralClockConfig(CFG_CLK_EIC , ENABLE);
/* EIC Configuration */
EIC_IRQChannelConfig(TB2_IRQChannel, ENABLE );
EIC_IRQChannelPriorityConfig(TB2_IRQChannel,1);
/*TB2 Configuration to toggle Leds each 500ms */
TB_InitStructure.TB_CLK_Source = TB_CLK_INTERNAL;
TB_InitStructure.TB_Prescaler = 0xEF; /* The internal TB Frequency = 100KHz */
TB_InitStructure.TB_Preload = 0xC350 ; /* 100000Hz * 0.5 s = 0xC350 */
TB_Init (TB2, &TB_InitStructure);
EIC_IRQCmd(ENABLE);
TB_ITConfig (TB2,ENABLE);
TB_Cmd(TB2, ENABLE);
In the interupt vectors I have:
void TB2_IRQHandler (void)
{
GPIO_BitWrite(GPIO1,GPIO_PIN_14 ,~GPIO_BitRead(GPIO1,GPIO_PIN_14));
TB_FlagClear(TB2);
}
(Please note the pin read/write and hardware was tested using the main loop previously).
Many thanks
