Subversion Repositories EngineBay2

Rev

Rev 36 | Rev 39 | 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 
 
9 mjames 11 
 
28 mjames 12 
unsigned volatile long RPM_Time[RPM_SAMPLES];  // sampled on both  edges
13 
unsigned volatile char RPM_Level[RPM_SAMPLES]; // active level when sampled
14 
unsigned volatile long RPM_Count; // incremented every reading
3 mjames 15 
 
29 mjames 16 
// this is set if there is a timer timeout interrupt
31 mjames 17 
unsigned char volatile periodPulse = 0;
29 mjames 18 
 
31 mjames 19 
static void
20 
triggerTim3 (void)
29 mjames 21 
{
31 mjames 22 
  htim3.Instance->CNT = 0;
23 
  htim3.Instance->CR1 |= TIM_CR1_CEN;
29 mjames 24 
 
25 
}
26 
 
31 mjames 27 
void
28 
TIM2_IRQHandler (void)
8 mjames 29 
{
31 mjames 30 
  if (__HAL_TIM_GET_FLAG(&htim2, TIM_FLAG_CC1))
31 
    {
32 
      __HAL_TIM_CLEAR_FLAG(&htim2, TIM_FLAG_CC1);
33 
      RPM_Time[RPM_Count] = __HAL_TIM_GET_COMPARE(&htim2, TIM_CHANNEL_1);
34 
      int CB_level = HAL_GPIO_ReadPin (CB_Pulse_GPIO_Port,
35 
                                       CB_Pulse_Pin);
36 
      RPM_Level[RPM_Count] = CB_level;
37 
      RPM_Count = (RPM_Count + 1) % RPM_SAMPLES;
38 
 
39 
      if ( CB_level == 0)
9 mjames 40 
        {
31 mjames 41 
          periodPulse = 0;
42 
          triggerTim3 ();
9 mjames 43 
        }
31 mjames 44 
    }
8 mjames 45 
}
46 
 
47 
 
37 mjames 48 
// timer variable shared between TIM3 and TIM4 handler.
49 
static char chtTimer = 0;
8 mjames 50 
 
31 mjames 51 
void
52 
TIM3_IRQHandler (void)
53 
{
54 
  if (__HAL_TIM_GET_FLAG(&htim3, TIM_FLAG_UPDATE))
55 
    {
56 
      __HAL_TIM_CLEAR_FLAG(&htim3, TIM_FLAG_UPDATE);
6 mjames 57 
 
31 mjames 58 
      if (chtTimer >= 3)  // every 300mS
59 
        {
60 
          chtTimer = 0;
6 mjames 61 
 
31 mjames 62 
          for (int instance = 0; instance < 2; instance++)
63 
            {
64 
              uint8_t buffer[2];
65 
              uint16_t Pin =
66 
                  (instance == 0) ? SPI_NS_Temp_Pin : SPI_NS_Temp2_Pin;
6 mjames 67 
 
31 mjames 68 
              HAL_GPIO_WritePin (SPI_NS_Temp_GPIO_Port, Pin, GPIO_PIN_RESET);
6 mjames 69 
 
31 mjames 70 
              HAL_SPI_Receive (&hspi1, buffer, 2, 2);
6 mjames 71 
 
31 mjames 72 
              HAL_GPIO_WritePin (SPI_NS_Temp_GPIO_Port, Pin, GPIO_PIN_SET);
6 mjames 73 
 
31 mjames 74 
              uint16_t obs = (buffer[0] << 8) | buffer[1];
6 mjames 75 
 
31 mjames 76 
              // good observation if the status bit is clear, and the reading is less than 1023
6 mjames 77 
 
31 mjames 78 
              uint16_t temp_c = obs >> 5;
6 mjames 79 
 
31 mjames 80 
              uint8_t good = ((obs & 7) == 0) && (temp_c > 0) && (temp_c < 250);
6 mjames 81 
 
31 mjames 82 
              if (good)
83 
                {
84 
                  CHT_Observations[instance] = temp_c;
6 mjames 85 
                }
31 mjames 86 
            }
6 mjames 87 
        }
31 mjames 88 
    }
6 mjames 89 
}
90 
 
37 mjames 91 
// 100mS periodic sampler handler
31 mjames 92 
void
37 mjames 93 
TIM4_IRQHandler (void)
94 
{
95 
  static char blink = 0;
96 
  if (__HAL_TIM_GET_FLAG(&htim4, TIM_FLAG_UPDATE))
97 
    {
98 
      __HAL_TIM_CLEAR_FLAG(&htim4, TIM_FLAG_UPDATE);
99 
 
100 
      blink = !blink;
101 
      HAL_GPIO_WritePin (LED_Blink_GPIO_Port, LED_Blink_Pin,
102 
                         blink ? GPIO_PIN_SET : GPIO_PIN_RESET);
103 
 
104 
      TimerFlag = 1;
105 
      if (NoSerialInCTR < 5)
106 
        {
107 
          NoSerialInCTR++;
108 
          if (NoSerialInCTR == 5)
109 
            {
110 
              NoSerialIn = 1;
111 
            }
112 
        }
113 
 
114 
      if (periodPulse == 1)
115 
        {
116 
        triggerTim3 ();
117 
 
118 
        }
119 
      periodPulse = 1;
120 
 
121 
 
122 
      chtTimer++;
123 
    }
124 
 
125 
}
126 
 
127 
 
128 
void
31 mjames 129 
resetSerialTimeout (void)
130 
{
131 
  __disable_irq ();
132 
  NoSerialInCTR = 0;
133 
  NoSerialIn = 0;
134 
  __enable_irq ();
6 mjames 135 
}
136