Alexan E
blinky example from NXP code bundle for LPC11Uxx. No mbed library used
Diff: KEIL_LPC11U_COMMON_LIB/timer16.c
- Revision:
- 1:0f1be4e75668
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/KEIL_LPC11U_COMMON_LIB/timer16.c Mon May 28 00:13:23 2012 +0000
@@ -0,0 +1,581 @@
+/****************************************************************************
+ * $Id:: timer16.c 9190 2012-02-16 20:59:45Z nxp41306 $
+ * Project: NXP LPC11Uxx 16-bit timer example
+ *
+ * Description:
+ * This file contains 16-bit timer code example which include timer
+ * initialization, timer interrupt handler, and related APIs for
+ * timer setup.
+*
+****************************************************************************
+* Software that is described herein is for illustrative purposes only
+* which provides customers with programming information regarding the
+* products. This software is supplied "AS IS" without any warranties.
+* NXP Semiconductors assumes no responsibility or liability for the
+* use of the software, conveys no license or title under any patent,
+* copyright, or mask work right to the product. NXP Semiconductors
+* reserves the right to make changes in the software without
+* notification. NXP Semiconductors also make no representation or
+* warranty that such application will be suitable for the specified
+* use without further testing or modification.
+
+* Permission to use, copy, modify, and distribute this software and its
+* documentation is hereby granted, under NXP Semiconductors'
+* relevant copyright in the software, without fee, provided that it
+* is used in conjunction with NXP Semiconductors microcontrollers. This
+* copyright, permission, and disclaimer notice must appear in all copies of
+* this code.
+
+****************************************************************************/
+
+#include "LPC11Uxx.h"
+#include "timer16.h"
+#include "nmi.h"
+
+volatile uint32_t timer16_0_counter[2] = {0,0};
+volatile uint32_t timer16_1_counter[2] = {0,0};
+volatile uint32_t timer16_0_capture[2] = {0,0};
+volatile uint32_t timer16_1_capture[2] = {0,0};
+volatile uint32_t timer16_0_period = 0;
+volatile uint32_t timer16_1_period = 0;
+
+/*****************************************************************************
+** Function name: delayMs
+**
+** Descriptions: Start the timer delay in milo seconds
+** until elapsed
+**
+** parameters: timer number, Delay value in milo second
+**
+** Returned value: None
+**
+*****************************************************************************/
+void delayMs(uint8_t timer_num, uint32_t delayInMs)
+{
+ if (timer_num == 0)
+ {
+ /*
+ * setup timer #0 for delay
+ */
+ LPC_CT16B0->TCR = 0x02; /* reset timer */
+ LPC_CT16B0->PR = 0x00; /* set prescaler to zero */
+ LPC_CT16B0->MR0 = delayInMs * (SystemCoreClock / 1000);
+ LPC_CT16B0->IR = 0xff; /* reset all interrrupts */
+ LPC_CT16B0->MCR = 0x04; /* stop timer on match */
+ LPC_CT16B0->TCR = 0x01; /* start timer */
+ /* wait until delay time has elapsed */
+ while (LPC_CT16B0->TCR & 0x01);
+ }
+ else if (timer_num == 1)
+ {
+ /*
+ * setup timer #1 for delay
+ */
+ LPC_CT16B1->TCR = 0x02; /* reset timer */
+ LPC_CT16B1->PR = 0x00; /* set prescaler to zero */
+ LPC_CT16B1->MR0 = delayInMs * (SystemCoreClock / 1000);
+ LPC_CT16B1->IR = 0xff; /* reset all interrrupts */
+ LPC_CT16B1->MCR = 0x04; /* stop timer on match */
+ LPC_CT16B1->TCR = 0x01; /* start timer */
+ /* wait until delay time has elapsed */
+ while (LPC_CT16B1->TCR & 0x01);
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: TIMER_0_IRQHandler
+**
+** Descriptions: Timer/CounterX and CaptureX interrupt handler
+**
+** parameters: None
+** Returned value: None
+**
+******************************************************************************/
+extern "C" void TIMER16_0_IRQHandler(void)
+{
+ if ( LPC_CT16B0->IR & (0x1<<0) )
+ {
+ LPC_CT16B0->IR = 0x1<<0; /* clear interrupt flag */
+ timer16_0_counter[0]++;
+ }
+ if ( LPC_CT16B0->IR & (0x1<<1) )
+ {
+ LPC_CT16B0->IR = 0x1<<1; /* clear interrupt flag */
+ timer16_0_counter[1]++;
+ }
+ if ( LPC_CT16B0->IR & (0x1<<4) )
+ {
+ LPC_CT16B0->IR = 0x1<<4; /* clear interrupt flag */
+ timer16_0_capture[0]++;
+ }
+ if ( LPC_CT16B0->IR & (0x1<<5) )
+ {
+ LPC_CT16B0->IR = 0x1<<5; /* clear interrupt flag */
+ timer16_0_capture[1]++;
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: TIMER_1_IRQHandler
+**
+** Descriptions: Timer/CounterX and CaptureX interrupt handler
+**
+** parameters: None
+** Returned value: None
+**
+******************************************************************************/
+extern "C" void TIMER16_1_IRQHandler(void)
+{
+ if ( LPC_CT16B1->IR & (0x1<<0) )
+ {
+ LPC_CT16B1->IR = 0x1<<0; /* clear interrupt flag */
+ timer16_1_counter[0]++;
+ }
+ if ( LPC_CT16B1->IR & (0x1<<1) )
+ {
+ LPC_CT16B1->IR = 0x1<<1; /* clear interrupt flag */
+ timer16_1_counter[1]++;
+ }
+ if ( LPC_CT16B1->IR & (0x1<<4) )
+ {
+ LPC_CT16B1->IR = 0x1<<4; /* clear interrupt flag */
+ timer16_1_capture[0]++;
+ }
+ if ( LPC_CT16B1->IR & (0x1<<5) )
+ {
+ LPC_CT16B1->IR = 0x1<<5; /* clear interrupt flag */
+ timer16_1_capture[1]++;
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: enable_timer
+**
+** Descriptions: Enable timer
+**
+** parameters: timer number: 0 or 1
+** Returned value: None
+**
+******************************************************************************/
+void enable_timer16(uint8_t timer_num)
+{
+ if ( timer_num == 0 )
+ {
+ LPC_CT16B0->TCR = 1;
+ }
+ else
+ {
+ LPC_CT16B1->TCR = 1;
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: disable_timer
+**
+** Descriptions: Disable timer
+**
+** parameters: timer number: 0 or 1
+** Returned value: None
+**
+******************************************************************************/
+void disable_timer16(uint8_t timer_num)
+{
+ if ( timer_num == 0 )
+ {
+ LPC_CT16B0->TCR = 0;
+ }
+ else
+ {
+ LPC_CT16B1->TCR = 0;
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: reset_timer
+**
+** Descriptions: Reset timer
+**
+** parameters: timer number: 0 or 1
+** Returned value: None
+**
+******************************************************************************/
+void reset_timer16(uint8_t timer_num)
+{
+ uint32_t regVal;
+
+ if ( timer_num == 0 )
+ {
+ regVal = LPC_CT16B0->TCR;
+ regVal |= 0x02;
+ LPC_CT16B0->TCR = regVal;
+ }
+ else
+ {
+ regVal = LPC_CT16B1->TCR;
+ regVal |= 0x02;
+ LPC_CT16B1->TCR = regVal;
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: Set_timer_capture
+**
+** Descriptions: set timer capture based on LOC number.
+**
+** parameters: timer number and location number
+** Returned value: None
+**
+******************************************************************************/
+void set_timer16_capture(uint8_t timer_num, uint8_t location )
+{
+ if ( timer_num == 0 )
+ {
+ /* Timer0_16 I/O config */
+ if ( location == 0 )
+ {
+ LPC_IOCON->PIO1_16 &= ~0x07;
+ LPC_IOCON->PIO1_16 |= 0x02; /* Timer0_16 CAP0 */
+// LPC_IOCON->PIO1_17 &= ~0x07;
+// LPC_IOCON->PIO1_17 |= 0x01; /* Timer0_16 CAP1 */
+ }
+ else if ( location == 1 )
+ {
+ LPC_IOCON->PIO0_2 &= ~0x07;
+ LPC_IOCON->PIO0_2 |= 0x02; /* Timer0_16 CAP0 */
+ }
+ else
+ {
+ while ( 1 ); /* Fatal location number error */
+ }
+ }
+ else
+ {
+ /* Timer1_16 I/O config */
+ if ( location == 0 )
+ {
+ LPC_IOCON->PIO0_20 &= ~0x07; /* Timer1_16 I/O config */
+ LPC_IOCON->PIO0_20 |= 0x01; /* Timer1_16 CAP0 */
+// LPC_IOCON->PIO1_18 &= ~0x07;
+// LPC_IOCON->PIO1_18 |= 0x01; /* Timer1_16 CAP1 */
+ }
+ else
+ {
+ while ( 1 ); /* Fatal location number error */
+ }
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: Set_timer_match
+**
+** Descriptions: set timer match based on LOC number.
+**
+** parameters: timer number, match enable, and location number
+** Returned value: None
+**
+******************************************************************************/
+void set_timer16_match(uint8_t timer_num, uint8_t match_enable, uint8_t location)
+{
+ if ( timer_num == 0 )
+ {
+ if ( match_enable & 0x01 )
+ {
+ /* Timer0_16 I/O config */
+ if ( location == 0 )
+ {
+ LPC_IOCON->PIO0_8 &= ~0x07;
+ LPC_IOCON->PIO0_8 |= 0x02; /* Timer0_16 MAT0 */
+ }
+ else if ( location == 1 )
+ {
+ LPC_IOCON->PIO1_13 &= ~0x07;
+ LPC_IOCON->PIO1_13 |= 0x02; /* Timer0_16 MAT0 */
+ }
+ }
+ if ( match_enable & 0x02 )
+ {
+ /* Timer0_16 I/O config */
+ if ( location == 0 )
+ {
+ LPC_IOCON->PIO0_9 &= ~0x07;
+ LPC_IOCON->PIO0_9 |= 0x02; /* Timer0_16 MAT1 */
+ }
+ else if ( location == 1 )
+ {
+ LPC_IOCON->PIO1_14 &= ~0x07;
+ LPC_IOCON->PIO1_14 |= 0x02; /* Timer0_16 MAT1 */
+ }
+ }
+ if ( match_enable & 0x04 )
+ {
+ /* Timer0_16 I/O config */
+ if ( location == 0 )
+ {
+#ifdef __SWD_DISABLED
+ LPC_IOCON->SWCLK_PIO0_10 &= ~0x07;
+ LPC_IOCON->SWCLK_PIO0_10 |= 0x03; /* Timer0_16 MAT2 */
+#endif
+ }
+ else if ( location == 1 )
+ {
+ LPC_IOCON->PIO1_15 &= ~0x07;
+ LPC_IOCON->PIO1_15 |= 0x02; /* Timer0_16 MAT0 */
+ }
+ }
+ }
+ else if ( timer_num == 1 )
+ {
+ if ( match_enable & 0x01 )
+ {
+ /* Timer1_16 I/O config */
+ if ( location == 0 )
+ {
+ LPC_IOCON->PIO0_21 &= ~0x07;
+ LPC_IOCON->PIO0_21 |= 0x01; /* Timer1_16 MAT0 */
+ }
+ }
+ if ( match_enable & 0x02 )
+ {
+ /* Timer1_16 I/O config */
+ if ( location == 0 )
+ {
+ LPC_IOCON->PIO0_22 &= ~0x07;
+ LPC_IOCON->PIO0_22 |= 0x02; /* Timer1_16 MAT1 */
+ }
+ else if ( location == 1 )
+ {
+ LPC_IOCON->PIO1_23 &= ~0x07;
+ LPC_IOCON->PIO1_23 |= 0x01; /* Timer1_16 MAT0 */
+ }
+ }
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: init_timer
+**
+** Descriptions: Initialize timer, set timer interval, reset timer,
+** install timer interrupt handler
+**
+** parameters: timer number and timer interval
+** Returned value: None
+**
+******************************************************************************/
+void init_timer16(uint8_t timer_num, uint32_t TimerInterval)
+{
+ if ( timer_num == 0 )
+ {
+ /* Some of the I/O pins need to be clearfully planned if
+ you use below module because JTAG and TIMER CAP/MAT pins are muxed. */
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<7);
+
+ LPC_CT16B0->MR0 = TimerInterval;
+ LPC_CT16B0->MR1 = TimerInterval;
+#if TIMER_MATCH
+ timer16_0_counter[0] = 0;
+ timer16_0_counter[1] = 0;
+ set_timer16_match(timer_num, 0x07, 0);
+ LPC_CT16B0->EMR &= ~(0xFF<<4);
+ LPC_CT16B0->EMR |= ((0x3<<4)|(0x3<<6)|(0x3<<8));
+#else
+ timer16_0_capture[0] = 0;
+ timer16_0_capture[1] = 0;
+ set_timer16_capture(timer_num, 0);
+ /* Capture 0 and 1 on rising edge, interrupt enable. */
+ LPC_CT16B0->CCR = (0x5<<0)|(0x5<<3);
+#endif
+ LPC_CT16B0->MCR = (0x3<<0)|(0x3<<3); /* Interrupt and Reset on MR0 and MR1 */
+
+ /* Enable the TIMER0 Interrupt */
+#if NMI_ENABLED
+ NVIC_DisableIRQ(TIMER_16_0_IRQn);
+ NMI_Init( TIMER_16_0_IRQn );
+#else
+ NVIC_EnableIRQ(TIMER_16_0_IRQn);
+#endif
+ }
+ else if ( timer_num == 1 )
+ {
+ /* Some of the I/O pins need to be clearfully planned if
+ you use below module because JTAG and TIMER CAP/MAT pins are muxed. */
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8);
+ LPC_CT16B1->MR0 = TimerInterval;
+ LPC_CT16B1->MR1 = TimerInterval;
+#if TIMER_MATCH
+ timer16_1_counter[0] = 0;
+ timer16_1_counter[1] = 0;
+ set_timer16_match(timer_num, 0x07, 0);
+ LPC_CT16B1->EMR &= ~(0xFF<<4);
+ LPC_CT16B1->EMR |= ((0x3<<4)|(0x3<<6)|(0x3<<8));
+#else
+ timer16_1_capture[0] = 0;
+ timer16_1_capture[1] = 0;
+ set_timer16_capture(timer_num, 0);
+ /* Capture 0 and 1 on rising edge, interrupt enable. */
+ LPC_CT16B1->CCR = (0x5<<0)|(0x5<<3);
+#endif
+ LPC_CT16B1->MCR = (0x3<<0)|(0x3<<3); /* Interrupt and Reset on MR0 and MR1 */
+
+ /* Enable the TIMER1 Interrupt */
+#if NMI_ENABLED
+ NVIC_DisableIRQ(TIMER_16_1_IRQn);
+ NMI_Init( TIMER_16_1_IRQn );
+#else
+ NVIC_EnableIRQ(TIMER_16_1_IRQn);
+#endif
+ }
+ return;
+}
+
+/******************************************************************************
+** Function name: init_timer16PWM
+**
+** Descriptions: Initialize timer as PWM
+**
+** parameters: timer number, period and match enable:
+** match_enable[0] = PWM for MAT0
+** match_enable[1] = PWM for MAT1
+** match_enable[2] = PWM for MAT2
+**
+** Returned value: None
+**
+******************************************************************************/
+void init_timer16PWM(uint8_t timer_num, uint32_t period, uint8_t match_enable, uint8_t cap_enabled)
+{
+ disable_timer16(timer_num);
+
+ if (timer_num == 1)
+ {
+ /* Some of the I/O pins need to be clearfully planned if
+ you use below module because JTAG and TIMER CAP/MAT pins are muxed. */
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<8);
+
+ /* Setup the external match register */
+ LPC_CT16B1->EMR = (1<<EMC3)|(1<<EMC2)|(1<<EMC1)|(2<<EMC0)|(1<<3)|(match_enable);
+
+ /* Setup the outputs */
+ /* If match0 is enabled, set the output */
+ set_timer16_match(timer_num, match_enable, 0 );
+
+ /* Enable the selected PWMs and enable Match3 */
+ LPC_CT16B1->PWMC = (1<<3)|(match_enable);
+
+ /* Setup the match registers */
+ /* set the period value to a global variable */
+ timer16_1_period = period;
+ LPC_CT16B1->MR3 = timer16_1_period;
+ LPC_CT16B1->MR0 = timer16_1_period/2;
+ LPC_CT16B1->MR1 = timer16_1_period/2;
+ LPC_CT16B1->MR2 = timer16_1_period/2;
+
+ /* Set match control register */
+ LPC_CT16B1->MCR = 1<<10;// | 1<<9; /* Reset on MR3 */
+
+ if (cap_enabled)
+ {
+ /* Use location 0 for test. */
+ set_timer16_capture( timer_num, 0 );
+ LPC_CT16B1->IR = 0xF; /* clear interrupt flag */
+
+ /* Set the capture control register */
+ LPC_CT16B1->CCR = 7;
+
+ }
+ /* Enable the TIMER1 Interrupt */
+ NVIC_EnableIRQ(TIMER_16_1_IRQn);
+ }
+ else
+ {
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<7);
+
+ /* Setup the external match register */
+ LPC_CT16B0->EMR = (1<<EMC3)|(1<<EMC2)|(1<<EMC1)|(1<<EMC0)|(1<<3)|(match_enable);
+
+ /* Setup the outputs */
+ /* If match0 is enabled, set the output */
+ set_timer16_match(timer_num, match_enable, 0 );
+
+ /* Enable the selected PWMs and enable Match3 */
+ LPC_CT16B0->PWMC = (1<<3)|(match_enable);
+
+ /* Setup the match registers */
+ /* set the period value to a global variable */
+ timer16_0_period = period;
+ LPC_CT16B0->MR3 = timer16_0_period;
+ LPC_CT16B0->MR0 = timer16_0_period/2;
+ LPC_CT16B0->MR1 = timer16_0_period/2;
+ LPC_CT16B0->MR2 = timer16_0_period/2;
+
+ /* Set the match control register */
+ LPC_CT16B0->MCR = 1<<10; /* Reset on MR3 */
+
+ /* Enable the TIMER1 Interrupt */
+ NVIC_EnableIRQ(TIMER_16_0_IRQn);
+ }
+}
+
+/******************************************************************************
+** Function name: pwm16_setMatch
+**
+** Descriptions: Set the pwm16 match values
+**
+** parameters: timer number, match numner and the value
+**
+** Returned value: None
+**
+******************************************************************************/
+void setMatch_timer16PWM (uint8_t timer_num, uint8_t match_nr, uint32_t value)
+{
+ if (timer_num)
+ {
+ switch (match_nr)
+ {
+ case 0:
+ LPC_CT16B1->MR0 = value;
+ break;
+ case 1:
+ LPC_CT16B1->MR1 = value;
+ break;
+ case 2:
+ LPC_CT16B1->MR2 = value;
+ break;
+ case 3:
+ LPC_CT16B1->MR3 = value;
+ break;
+ default:
+ break;
+ }
+ }
+ else
+ {
+ switch (match_nr)
+ {
+ case 0:
+ LPC_CT16B0->MR0 = value;
+ break;
+ case 1:
+ LPC_CT16B0->MR1 = value;
+ break;
+ case 2:
+ LPC_CT16B0->MR2 = value;
+ break;
+ case 3:
+ LPC_CT16B0->MR3 = value;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+/******************************************************************************
+** End Of File
+******************************************************************************/