/*
* misc.c
*
* Created on: 21 Sep 2016
* Author: Mike
*/
#include "stm32l1xx_hal.h"
#include "misc.h"
#include "main.h"
extern TIM_HandleTypeDef htim2;
extern TIM_HandleTypeDef htim3;
extern TIM_HandleTypeDef htim6;
unsigned volatile long RPM_Time[RPM_SAMPLES]; // sampled on both edges
unsigned volatile char RPM_Level[RPM_SAMPLES]; // active level when sampled
unsigned volatile long RPM_Count; // incremented every reading
// this is set if there is a timer timeout interrupt
unsigned char volatile periodPulse = 0;
static void
triggerTim3 (void)
{
htim3.Instance->CNT = 0;
htim3.Instance->CR1 |= TIM_CR1_CEN;
}
void
TIM2_IRQHandler (void)
{
if (__HAL_TIM_GET_FLAG(&htim2, TIM_FLAG_CC1))
{
__HAL_TIM_CLEAR_FLAG(&htim2, TIM_FLAG_CC1);
RPM_Time[RPM_Count] = __HAL_TIM_GET_COMPARE(&htim2, TIM_CHANNEL_1);
int CB_level = HAL_GPIO_ReadPin (CB_Pulse_GPIO_Port,
CB_Pulse_Pin);
RPM_Level[RPM_Count] = CB_level;
RPM_Count = (RPM_Count + 1) % RPM_SAMPLES;
if ( CB_level == 0)
{
periodPulse = 0;
triggerTim3 ();
}
}
}
char chtTimer = 0;
char blink = 0;
// 100mS periodic sampler handler
void
TIM6_IRQHandler (void)
{
if (__HAL_TIM_GET_FLAG(&htim6, TIM_FLAG_UPDATE))
{
__HAL_TIM_CLEAR_FLAG(&htim6, TIM_FLAG_UPDATE);
blink = !blink;
HAL_GPIO_WritePin (LED_Blink_GPIO_Port, LED_Blink_Pin,
blink ? GPIO_PIN_SET : GPIO_PIN_RESET);
TimerFlag = 1;
if (NoSerialInCTR < 5)
{
NoSerialInCTR++;
if (NoSerialInCTR == 5)
{
NoSerialIn = 1;
}
}
if (periodPulse == 1)
{
triggerTim3 ();
}
periodPulse = 1;
chtTimer++;
}
}
void
TIM3_IRQHandler (void)
{
if (__HAL_TIM_GET_FLAG(&htim3, TIM_FLAG_UPDATE))
{
__HAL_TIM_CLEAR_FLAG(&htim3, TIM_FLAG_UPDATE);
if (chtTimer >= 3) // every 300mS
{
chtTimer = 0;
for (int instance = 0; instance < 2; instance++)
{
uint8_t buffer[2];
uint16_t Pin =
(instance == 0) ? SPI_NS_Temp_Pin : SPI_NS_Temp2_Pin;
HAL_GPIO_WritePin (SPI_NS_Temp_GPIO_Port, Pin, GPIO_PIN_RESET);
HAL_SPI_Receive (&hspi1, buffer, 2, 2);
HAL_GPIO_WritePin (SPI_NS_Temp_GPIO_Port, Pin, GPIO_PIN_SET);
uint16_t obs = (buffer[0] << 8) | buffer[1];
// good observation if the status bit is clear, and the reading is less than 1023
uint16_t temp_c = obs >> 5;
uint8_t good = ((obs & 7) == 0) && (temp_c > 0) && (temp_c < 250);
if (good)
{
CHT_Observations[instance] = temp_c;
}
}
}
}
}
void
resetSerialTimeout (void)
{
__disable_irq ();
NoSerialInCTR = 0;
NoSerialIn = 0;
__enable_irq ();
}