/******************************************************************************
** 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)
{
uint32_t i;
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
for ( i = 0; i < 4; i++ )
{
timer16_0_counter[i] = 0;
}
set_timer16_match(timer_num, 0x07, 0);
LPC_CT16B0->EMR &= ~(0xFF<<4);
LPC_CT16B0->EMR |= ((0x3<<4)|(0x3<<6)|(0x3<<8));
#else
for ( i = 0; i < 4; i++ )
{
timer16_0_capture[i] = 0;
}
set_timer16_capture(timer_num, 0);
/* Capture 0 and 2 on rising edge, interrupt enable. */
LPC_CT16B0->CCR = (0x5<<0)|(0x5<<6);
#endif
LPC_CT16B0->MCR = (0x3<<0)|(0x3<<3); /* Interrupt and Reset on MR0 and MR1 */
/* Enable the TIMER0 Interrupt */
#if NMI_ENABLED
NVIC_DisableIRQ(CT16B0_IRQn);
NMI_Init( CT16B0_IRQn );
#else
NVIC_EnableIRQ(CT16B0_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
for ( i = 0; i < 4; i++ )
{
timer16_1_counter[i] = 0;
}
set_timer16_match(timer_num, 0x07, 0);
LPC_CT16B1->EMR &= ~(0xFF<<4);
LPC_CT16B1->EMR |= ((0x3<<4)|(0x3<<6)|(0x3<<8));
#else
for ( i = 0; i < 4; i++ )
{
timer16_1_capture[i] = 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(CT16B1_IRQn);
NMI_Init( CT16B1_IRQn );
#else
NVIC_EnableIRQ(CT16B1_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);
}
}
