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Fix LPC176x timer functions

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Co-Authored-By: ejtagle <ejtagle@hotmail.com>
This commit is contained in:
Scott Lahteine
2018-05-15 03:32:40 -05:00
parent 59f7861bcb
commit 206014a957
5 changed files with 102 additions and 87 deletions
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57
Marlin/src/HAL/HAL_LPC1768/HAL_timers.cpp
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@ -23,7 +23,7 @@
/**
* Description:
*
* For TARGET_LPC1768
* Timers for LPC1768
*/
#ifdef TARGET_LPC1768
@ -32,62 +32,35 @@
#include "HAL_timers.h"
void HAL_timer_init(void) {
SBI(LPC_SC->PCONP, 1); // power on timer0
SBI(LPC_SC->PCONP, SBIT_TIMER0); // Power ON Timer 0
LPC_TIM0->PR = (HAL_TIMER_RATE) / (HAL_STEPPER_TIMER_RATE) - 1; // Use prescaler to set frequency if needed
SBI(LPC_SC->PCONP, 2); // power on timer1
SBI(LPC_SC->PCONP, SBIT_TIMER1); // Power ON Timer 1
LPC_TIM1->PR = (HAL_TIMER_RATE) / 1000000 - 1;
}
void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency) {
switch (timer_num) {
case 0:
LPC_TIM0->MCR = 3; // Match on MR0, reset on MR0
LPC_TIM0->MCR = _BV(SBIT_MR0I) | _BV(SBIT_MR0R); // Match on MR0, reset on MR0, interrupts when NVIC enables them
LPC_TIM0->MR0 = uint32_t(HAL_STEPPER_TIMER_RATE) / frequency; // Match value (period) to set frequency
LPC_TIM0->TCR = _BV(0); // enable
LPC_TIM0->TCR = _BV(SBIT_CNTEN); // Counter Enable
NVIC_SetPriority(TIMER0_IRQn, NVIC_EncodePriority(0, 1, 0));
NVIC_EnableIRQ(TIMER0_IRQn);
break;
case 1:
LPC_TIM1->MCR = 3;
LPC_TIM1->MCR = _BV(SBIT_MR0I) | _BV(SBIT_MR0R); // Match on MR0, reset on MR0, interrupts when NVIC enables them
LPC_TIM1->MR0 = uint32_t(HAL_TEMP_TIMER_RATE) / frequency;
LPC_TIM1->TCR = _BV(0);
LPC_TIM1->TCR = _BV(SBIT_CNTEN); // Counter Enable
NVIC_SetPriority(TIMER1_IRQn, NVIC_EncodePriority(0, 2, 0));
NVIC_EnableIRQ(TIMER1_IRQn);
break;
default: break;
}
}
void HAL_timer_enable_interrupt(const uint8_t timer_num) {
switch (timer_num) {
case 0:
NVIC_EnableIRQ(TIMER0_IRQn); // Enable interrupt handler
NVIC_SetPriority(TIMER0_IRQn, NVIC_EncodePriority(0, 1, 0));
break;
case 1:
NVIC_EnableIRQ(TIMER1_IRQn);
NVIC_SetPriority(TIMER1_IRQn, NVIC_EncodePriority(0, 2, 0));
break;
}
}
void HAL_timer_disable_interrupt(const uint8_t timer_num) {
switch (timer_num) {
case 0: NVIC_DisableIRQ(TIMER0_IRQn); break; // disable interrupt handler
case 1: NVIC_DisableIRQ(TIMER1_IRQn); break;
}
}
bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {
switch (timer_num) {
case 0: return NVIC_GetActive(TIMER0_IRQn);
case 1: return NVIC_GetActive(TIMER1_IRQn);
}
return false;
}
void HAL_timer_isr_prologue(const uint8_t timer_num) {
switch (timer_num) {
case 0: SBI(LPC_TIM0->IR, 0); break; // Clear the Interrupt
case 1: SBI(LPC_TIM1->IR, 0); break;
}
}
#endif // TARGET_LPC1768