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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3 | mjames | 1 | /* |
| 2 | * misc.c |
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| 3 | * |
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| 4 | * Created on: 21 Sep 2016 |
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| 5 | * Author: Mike |
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| 6 | */ |
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| 37 | mjames | 7 | #include "stm32f1xx_hal.h" |
| 9 | mjames | 8 | #include "misc.h" |
| 9 | #include "main.h" |
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| 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 |
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| 45 | mjames | 19 | triggerTim3(void) |
| 29 | mjames | 20 | { |
| 45 | mjames | 21 | htim3.Instance->CNT = 0; |
| 22 | htim3.Instance->CR1 |= TIM_CR1_CEN; |
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| 29 | mjames | 23 | } |
| 24 | |||
| 37 | mjames | 25 | // timer variable shared between TIM3 and TIM4 handler. |
| 26 | static char chtTimer = 0; |
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| 8 | mjames | 27 | |
| 45 | mjames | 28 | void TIM3_IRQHandler(void) |
| 31 | mjames | 29 | { |
| 30 | if (__HAL_TIM_GET_FLAG(&htim3, TIM_FLAG_UPDATE)) |
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| 45 | mjames | 31 | { |
| 32 | __HAL_TIM_CLEAR_FLAG(&htim3, TIM_FLAG_UPDATE); |
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| 33 | |||
| 34 | tim3triggered = 0; |
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| 35 | if (chtTimer >= 3) // every 300mS |
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| 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++) |
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| 41 | { |
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| 42 | uint8_t buffer[2]; |
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| 41 | mjames | 43 | |
| 45 | mjames | 44 | nextTempCS(); |
| 45 | HAL_SPI_Receive(&hspi1, buffer, 2, 2); |
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| 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 | { |
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| 57 | Temp_Observations[instance] = temp_c; |
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| 58 | } |
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| 59 | } |
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| 60 | nextTempCS(); // clock CS one more time to deselect all chips |
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| 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; |
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| 69 | if (__HAL_TIM_GET_FLAG(&htim4, TIM_FLAG_UPDATE)) |
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| 45 | mjames | 70 | { |
| 71 | __HAL_TIM_CLEAR_FLAG(&htim4, TIM_FLAG_UPDATE); |
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| 37 | mjames | 72 | |
| 45 | mjames | 73 | blink = !blink; |
| 74 | HAL_GPIO_WritePin(LED_Blink_GPIO_Port, LED_Blink_Pin, |
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| 75 | blink ? GPIO_PIN_SET : GPIO_PIN_RESET); |
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| 37 | mjames | 76 | |
| 77 | |||
| 45 | mjames | 78 | if (periodPulse == 1) |
| 79 | { |
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| 80 | triggerTim3(); |
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| 37 | mjames | 81 | } |
| 45 | mjames | 82 | // indicate that timer 4 firing is owning the timer 3 trigger |
| 83 | periodPulse = 1; |
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| 37 | mjames | 84 | |
| 45 | mjames | 85 | chtTimer++; |
| 86 | } |
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| 37 | mjames | 87 | } |