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roberthroseroo · Jun 19, 2018 · d30289d · d30289d
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diff --git a/timer/IRQ_timer.c b/timer/IRQ_timer.c
@@ -0,0 +1,52 @@
+/*********************************************************************************************************
+**--------------File Info---------------------------------------------------------------------------------
+** File name:           IRQ_timer.c
+** Last modified Date:  2014-09-25
+** Last Version:        V1.00
+** Descriptions:        functions to manage T0 and T1 interrupts
+** Correlated files:    timer.h
+**--------------------------------------------------------------------------------------------------------
+*********************************************************************************************************/
+#include "lpc17xx.h"
+#include "timer.h"
+#include "../Potenciometer/potenciometer.h"
+
+
+/******************************************************************************
+** Function name:		Timer0_IRQHandler
+**
+** Descriptions:		Timer/Counter 0 interrupt handler
+**
+** parameters:			None
+** Returned value:		None
+**
+******************************************************************************/
+
+void TIMER0_IRQHandler (void)
+{
+  LPC_TIM0->IR = 1;			/* clear interrupt flag */
+	/*once the timer is done the A/D converter starts again*/
+	LPC_ADC->ADCR |= (0<<24); // starts the A/D converter
+	LPC_ADC->ADCR |= (1<<24); // starts the A/D converter
+  return;
+}
+
+
+/******************************************************************************
+** Function name:		Timer1_IRQHandler
+**
+** Descriptions:		Timer/Counter 1 interrupt handler
+**
+** parameters:			None
+** Returned value:		None
+**
+******************************************************************************/
+void TIMER1_IRQHandler (void)
+{
+  LPC_TIM1->IR = 1;			/* clear interrupt flag */
+	return;
+}
+
+/******************************************************************************
+**                            End Of File
+******************************************************************************/
diff --git a/timer/funct_timer.c b/timer/funct_timer.c
@@ -0,0 +1,58 @@
+/*********************************************************************************************************
+**--------------File Info---------------------------------------------------------------------------------
+** File name:           funct_timer.h
+** Last modified Date:  2014-09-25
+** Last Version:        V1.00
+** Descriptions:        High level functions, possibly exploiting lib_*.c functions
+** Correlated files:    timer.h
+**--------------------------------------------------------------------------------------------------------       
+*********************************************************************************************************/
+#include "lpc17xx.h"
+#include "timer.h"
+
+/*****************************************************************************
+** Function name:		delayMs
+**
+** Descriptions:		Start the timer delay in milo seconds
+**						until elapsed
+**
+** parameters:			timer number, Delay value in milo second			 
+** 						
+** Returned value:		None
+** 
+** Comments [PB]:		Not a very good functions because it is 
+**						keeping the processor control while waiting
+**						count completion
+*****************************************************************************/
+void delayMs(uint8_t timer_num, uint32_t delayInMs)
+{
+  if ( timer_num == 0 )
+  {
+	LPC_TIM0->TCR = 0x02;		/* reset timer */
+	LPC_TIM0->PR  = 0x00;		/* set prescaler to zero */
+	LPC_TIM0->MR0 = delayInMs * (9000000 / 1000-1);
+	LPC_TIM0->IR  = 0xff;		/* reset all interrrupts */
+	LPC_TIM0->MCR = 0x04;		/* stop timer on match */
+	LPC_TIM0->TCR = 0x01;		/* start timer */
+
+	/* wait until delay time has elapsed */
+	while (LPC_TIM0->TCR & 0x01);
+  }
+  else if ( timer_num == 1 )
+  {
+	LPC_TIM1->TCR = 0x02;		/* reset timer */
+	LPC_TIM1->PR  = 0x00;		/* set prescaler to zero */
+	LPC_TIM1->MR0 = delayInMs * (9000000 / 1000-1);
+	LPC_TIM1->IR  = 0xff;		/* reset all interrrupts */
+	LPC_TIM1->MCR = 0x04;		/* stop timer on match */
+	LPC_TIM1->TCR = 0x01;		/* start timer */
+
+	/* wait until delay time has elapsed */
+	while (LPC_TIM1->TCR & 0x01);
+  }
+  return;
+}
+
+/******************************************************************************
+**                            End Of File
+******************************************************************************/
diff --git a/timer/lib_timer.c b/timer/lib_timer.c
@@ -0,0 +1,161 @@
+/*********************************************************************************************************
+**--------------File Info---------------------------------------------------------------------------------
+** File name:           lib_timer.h
+** Last modified Date:  2014-09-25
+** Last Version:        V1.00
+** Descriptions:        atomic functions to be used by higher sw levels
+** Correlated files:    lib_timer.c, funct_timer.c, IRQ_timer.c
+**--------------------------------------------------------------------------------------------------------
+*********************************************************************************************************/
+#include "lpc17xx.h"
+#include "timer.h"
+
+/******************************************************************************
+** Function name:		enable_timer
+**
+** Descriptions:		Enable timer
+**
+** parameters:			timer number: 0 or 1
+** Returned value:		None
+**
+******************************************************************************/
+void enable_timer( uint8_t timer_num )
+{
+  if ( timer_num == 0 )
+  {
+	LPC_TIM0->TCR = 1;
+  }
+  else
+  {
+	LPC_TIM1->TCR = 1;
+  }
+  return;
+}
+
+/******************************************************************************
+** Function name:		disable_timer
+**
+** Descriptions:		Disable timer
+**
+** parameters:			timer number: 0 or 1
+** Returned value:		None
+**
+******************************************************************************/
+void disable_timer( uint8_t timer_num )
+{
+  if ( timer_num == 0 )
+  {
+	LPC_TIM0->TCR = 0;
+  }
+  else
+  {
+	LPC_TIM1->TCR = 0;
+  }
+  return;
+}
+
+/******************************************************************************
+** Function name:		reset_timer
+**
+** Descriptions:		Reset timer
+**
+** parameters:			timer number: 0 or 1
+** Returned value:		None
+**
+******************************************************************************/
+void reset_timer( uint8_t timer_num )
+{
+  uint32_t regVal;
+
+  if ( timer_num == 0 )
+  {
+	regVal = LPC_TIM0->TCR;
+	regVal |= 0x02;
+	LPC_TIM0->TCR = regVal;
+  }
+  else
+  {
+	regVal = LPC_TIM1->TCR;
+	regVal |= 0x02;
+	LPC_TIM1->TCR = regVal;
+  }
+  return;
+}
+
+uint32_t init_timer ( uint8_t timer_num, uint32_t TimerInterval )
+{
+  if ( timer_num == 0 )
+  {
+	LPC_TIM0->MR0 = TimerInterval;
+
+//*** <<< Use Configuration Wizard in Context Menu >>> ***
+// <h> timer0 MCR
+//   <e.0> MR0I
+//	 <i> 1 Interrupt on MR0: an interrupt is generated when MR0 matches the value in the TC. 0
+//	 <i> 0 This interrupt is disabled
+//   </e>
+//   <e.1> MR0R
+//	 <i> 1 Reset on MR0: the TC will be reset if MR0 matches it.
+//	 <i> 0 Feature disabled.
+//   </e>
+//   <e.2> MR0S
+//	 <i> 1 Stop on MR0: the TC and PC will be stopped and TCR[0] will be set to 0 if MR0 matches the TC
+//	 <i> 0 Feature disabled.
+//   </e>
+//   <e.3> MR1I
+//	 <i> 1 Interrupt on MR1: an interrupt is generated when MR0 matches the value in the TC. 0
+//	 <i> 0 This interrupt is disabled
+//   </e>
+//   <e.4> MR1R
+//	 <i> 1 Reset on MR1: the TC will be reset if MR0 matches it.
+//	 <i> 0 Feature disabled.
+//   </e>
+//   <e.5> MR1S
+//	 <i> 1 Stop on MR1: the TC and PC will be stopped and TCR[1] will be set to 0 if MR1 matches the TC
+//	 <i> 0 Feature disabled.
+//   </e>
+//   <e.6> MR2I
+//	 <i> 1 Interrupt on MR2: an interrupt is generated when MR2 matches the value in the TC.
+//	 <i> 0 This interrupt is disabled
+//   </e>
+//   <e.7> MR2R
+//	 <i> 1 Reset on MR2: the TC will be reset if MR2 matches it.
+//	 <i> 0 Feature disabled.
+//   </e>
+//   <e.8> MR2S
+//	 <i> 1 Stop on MR2: the TC and PC will be stopped and TCR[2] will be set to 0 if MR2 matches the TC
+//	 <i> 0 Feature disabled.
+//   </e>
+//   <e.9> MR3I
+//	 <i> 1 Interrupt on MR3: an interrupt is generated when MR3 matches the value in the TC.
+//	 <i> 0 This interrupt is disabled
+//   </e>
+//   <e.10> MR3R
+//	 <i> 1 Reset on MR3: the TC will be reset if MR3 matches it.
+//	 <i> 0 Feature disabled.
+//   </e>
+//   <e.11> MR3S
+//	 <i> 1 Stop on MR3: the TC and PC will be stopped and TCR[3] will be set to 0 if MR3 matches the TC
+//	 <i> 0 Feature disabled.
+//   </e>
+	LPC_TIM0->MCR = 3;
+// </h>
+//*** <<< end of configuration section >>>    ***
+
+	NVIC_EnableIRQ(TIMER0_IRQn);
+	return (1);
+  }
+  else if ( timer_num == 1 )
+  {
+	LPC_TIM1->MR0 = TimerInterval;
+	LPC_TIM1->MCR = 3;				/* Interrupt and Reset on MR1 */
+
+	NVIC_EnableIRQ(TIMER1_IRQn);
+	return (1);
+  }
+  return (0);
+}
+
+/******************************************************************************
+**                            End Of File
+******************************************************************************/
diff --git a/timer/timer.h b/timer/timer.h
@@ -0,0 +1,30 @@
+/*********************************************************************************************************
+**--------------File Info---------------------------------------------------------------------------------
+** File name:           timer.h
+** Last modified Date:  2014-09-25
+** Last Version:        V1.00
+** Descriptions:        Prototypes of functions included in the lib_timer, funct_timer, IRQ_timer .c files
+** Correlated files:    lib_timer.c, funct_timer.c, IRQ_timer.c
+**--------------------------------------------------------------------------------------------------------
+*********************************************************************************************************/
+#ifndef __TIMER_H
+#define __TIMER_H
+
+/* da capire quanto vale in millisecondi ms */
+#define TIME_INTERVAL	(9000000/100 - 1)
+
+/* funct_timer.c */
+extern void delayMs(uint8_t timer_num, uint32_t delayInMs);
+/* init_timer.c */
+extern uint32_t init_timer( uint8_t timer_num, uint32_t timerInterval );
+extern void enable_timer( uint8_t timer_num );
+extern void disable_timer( uint8_t timer_num );
+extern void reset_timer( uint8_t timer_num );
+/* IRQ_timer.c */
+extern void TIMER0_IRQHandler (void);
+extern void TIMER1_IRQHandler (void);
+
+#endif /* end __TIMER_H */
+/*****************************************************************************
+**                            End Of File
+******************************************************************************/