STM32F107VC/timer2 - Revision history

Heth at 05:21, 5 October 2017

2017-10-05T05:21:23Z

Heth at 06:37, 17 November 2016

2016-11-17T06:37:41Z

Heth at 09:17, 14 November 2016

2016-11-14T09:17:50Z

Heth at 09:18, 11 October 2016

2016-10-11T09:18:13Z

Heth: added Category:Embedded using HotCat

2015-12-02T11:26:56Z

added Category:Embedded using HotCat

Heth: Created page with "This sourrce code enables timer2 and initializes it for 10 interrupts pr. second. /---------------------------------------------------------------------------- ..."

2015-12-02T11:26:51Z

Created page with "This sourrce code enables timer2 and initializes it for 10 interrupts pr. second. <source lang=c> /*----------------------------------------------------------------------------* ..."

New page

This sourrce code enables timer2 and initializes it for 10 interrupts pr. second.
<source lang=c>
/*----------------------------------------------------------------------------*
* Name: timer.c *
* Purpose: Initialize TIM2 and enable IRQHandler for TIM2 *
* Alias: Driver for TIM2 *
* Function to be called to initialize TIM2: timer_init() *
*----------------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "Board_LED.h"

/*
* TIM_DIER_UIE == 1
* TIM_CR1_CEN == 1
*/
/*----------------------------------------------------------------------------
* TIM2 initializer 'timer_init': used to initialize TIM2
*---------------------------------------------------------------------------*/
void timer_init() {

// Enable "timer 2" clock (RCC->APB1ENR bit 0 = 1)
RCC->APB1ENR |= 1;

// Setting prescale value (72.000.000 / 7200 = 10000 Hz) (Side 403 Ref Manual)
TIM2->PSC = 7200 - 1;

// Autoload Register 10000 Hz - 1 (it starts at 0) (Side 354 Ref Manual)
TIM2->ARR = 1000 - 1;

// Enable IRQ interrupt for TIM2
NVIC_EnableIRQ(TIM2_IRQn);

// Enable interrupt on update
TIM2->DIER |= TIM_DIER_UIE; // TIM_DIER_UIE = 1

// Enable Counter (TIM2_CR1 bit 0 = 1)
TIM2->CR1 |= TIM_CR1_CEN; // TIM_CR1_CEN = 1

}

/*----------------------------------------------------------------------------
* TIM2 IRQHANDLER 'TIM2_IRQHandler': run when timer interrupts.
*---------------------------------------------------------------------------*/
void TIM2_IRQHandler(void) __irq{
// Resets the IRQ Handler
static uint8_t ledState=0;
TIM2->SR = 0;

if ( ledState == 0 ) {
LED_On(1);
ledState=1;
} else {
LED_Off(1);
ledState=0;
}
}
</lang>

@@ Line 63: / Line 63: @@
+	}
+}
-</lang>
+</source>
 [[Category:Embedded]]

@@ Line 1: / Line 1: @@
-<!--
 This sourrce code enables timer2 and initializes it for 10 interrupts pr. second.
 <source lang=c>
@@ Line 64: / Line 64: @@
+}
 </lang>
 [[Category:Embedded]]

@@ Line 1: / Line 1: @@
 This sourrce code enables timer2 and initializes it for 10 interrupts pr. second.
 <source lang=c>
@@ Line 63: / Line 64: @@
+}
 </lang>
+-->
 [[Category:Embedded]]

← Older revision		Revision as of 11:26, 2 December 2015
Line 63:		Line 63:
	}		}
	</lang>		</lang>
		+
		+	[[Category:Embedded]]

@@ Line 2: / Line 2: @@
 <source lang=c>
 /*----------------------------------------------------------------------------*
-  * Name:    timer.c                                                           *
+  * Name:    timer.c /HeTh@mercantec.dk                                                           *
   * Purpose: Initialize TIM2 and enable IRQHandler for TIM2                    *
   * Alias:   Driver for TIM2                                                   *