Subversion Repositories EngineBay2

Rev

Rev 47 | Rev 52 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
3 mjames 1 
/*
2 
 * misc.c
3 
 *
4 
 *  Created on: 21 Sep 2016
5 
 *      Author: Mike
6 
 */
37 mjames 7 
#include "stm32f1xx_hal.h"
9 mjames 8 
#include "misc.h"
9 
#include "main.h"
3 mjames 10 
 
29 mjames 11 
// this is set if there is a timer timeout interrupt
31 mjames 12 
unsigned char volatile periodPulse = 0;
29 mjames 13 
 
48 mjames 14 
// this is set when timer 3 was triggerd
39 mjames 15 
unsigned char volatile tim3triggered = 0;
16 
 
48 mjames 17 
// this is exported
18 
void
45 mjames 19 
triggerTim3(void)
29 mjames 20 
{
45 mjames 21 
  htim3.Instance->CNT = 0;
22 
  htim3.Instance->CR1 |= TIM_CR1_CEN;
29 mjames 23 
}
24 
 
37 mjames 25 
// timer variable shared between TIM3 and TIM4 handler.
26 
static char chtTimer = 0;
8 mjames 27 
 
45 mjames 28 
void TIM3_IRQHandler(void)
31 mjames 29 
{
30 
  if (__HAL_TIM_GET_FLAG(&htim3, TIM_FLAG_UPDATE))
45 mjames 31 
  {
32 
    __HAL_TIM_CLEAR_FLAG(&htim3, TIM_FLAG_UPDATE);
33 
 
34 
    tim3triggered = 0;
35 
    if (chtTimer >= 3) // every 300mS
31 mjames 36 
    {
45 mjames 37 
      chtTimer = 0;
6 mjames 38 
 
45 mjames 39 
      resetTempCS();
40 
      for (int instance = 0; instance < NUM_SPI_TEMP_SENS; instance++)
41 
      {
42 
        uint8_t buffer[2];
41 mjames 43 
 
45 mjames 44 
        nextTempCS();
45 
        HAL_SPI_Receive(&hspi1, buffer, 2, 2);
6 mjames 46 
 
45 mjames 47 
        uint16_t obs = (buffer[0] << 8) | buffer[1];
6 mjames 48 
 
45 mjames 49 
        // good observation if the status bit is clear, and the reading is less than 1023
6 mjames 50 
 
45 mjames 51 
        uint16_t temp_c = obs >> 5;
6 mjames 52 
 
45 mjames 53 
        uint8_t good = ((obs & 7) == 0) && (temp_c > 0) && (temp_c < 250);
6 mjames 54 
 
45 mjames 55 
        if (good)
56 
        {
57 
          Temp_Observations[instance] = temp_c;
58 
        }
59 
      }
60 
      nextTempCS(); // clock CS one more time to deselect all chips
31 mjames 61 
    }
45 mjames 62 
  }
6 mjames 63 
}
64 
 
37 mjames 65 
// 100mS periodic sampler handler
45 mjames 66 
void TIM4_IRQHandler(void)
37 mjames 67 
{
68 
  static char blink = 0;
69 
  if (__HAL_TIM_GET_FLAG(&htim4, TIM_FLAG_UPDATE))
45 mjames 70 
  {
71 
    __HAL_TIM_CLEAR_FLAG(&htim4, TIM_FLAG_UPDATE);
37 mjames 72 
 
45 mjames 73 
    blink = !blink;
74 
    HAL_GPIO_WritePin(LED_Blink_GPIO_Port, LED_Blink_Pin,
75 
                      blink ? GPIO_PIN_SET : GPIO_PIN_RESET);
37 mjames 76 
 
45 mjames 77 
    TimerFlag = 1;
78 
    if (NoSerialInCTR < 5)
79 
    {
80 
      NoSerialInCTR++;
81 
      if (NoSerialInCTR == 5)
82 
      {
83 
        NoSerialIn = 1;
84 
      }
85 
    }
37 mjames 86 
 
45 mjames 87 
    if (periodPulse == 1)
88 
    {
89 
      triggerTim3();
37 mjames 90 
    }
45 mjames 91 
    // indicate that timer 4 firing is owning the timer 3 trigger
92 
    periodPulse = 1;
37 mjames 93 
 
45 mjames 94 
    chtTimer++;
95 
  }
37 mjames 96 
}
97 
 
45 mjames 98 
void resetSerialTimeout(void)
31 mjames 99 
{
45 mjames 100 
  __disable_irq();
31 mjames 101 
  NoSerialInCTR = 0;
102 
  NoSerialIn = 0;
45 mjames 103 
  __enable_irq();
6 mjames 104 
}