Rev 52 | Details | Compare with Previous | Last modification | View Log | RSS feed
| 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 | |
| 55 | mjames | 14 | // this is set when timer 3 was triggerd |
| 39 | mjames | 15 | unsigned char volatile tim3triggered = 0; |
| 16 | |||
| 55 | mjames | 17 | // this is exported |
| 18 | void triggerTim3(void) |
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| 29 | mjames | 19 | { |
| 45 | mjames | 20 | htim3.Instance->CNT = 0; |
| 21 | htim3.Instance->CR1 |= TIM_CR1_CEN; |
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| 29 | mjames | 22 | } |
| 23 | |||
| 37 | mjames | 24 | // timer variable shared between TIM3 and TIM4 handler. |
| 25 | static char chtTimer = 0; |
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| 8 | mjames | 26 | |
| 45 | mjames | 27 | void TIM3_IRQHandler(void) |
| 31 | mjames | 28 | { |
| 29 | if (__HAL_TIM_GET_FLAG(&htim3, TIM_FLAG_UPDATE)) |
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| 45 | mjames | 30 | { |
| 31 | __HAL_TIM_CLEAR_FLAG(&htim3, TIM_FLAG_UPDATE); |
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| 32 | |||
| 33 | tim3triggered = 0; |
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| 34 | if (chtTimer >= 3) // every 300mS |
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| 31 | mjames | 35 | { |
| 45 | mjames | 36 | chtTimer = 0; |
| 6 | mjames | 37 | |
| 45 | mjames | 38 | resetTempCS(); |
| 39 | for (int instance = 0; instance < NUM_SPI_TEMP_SENS; instance++) |
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| 40 | { |
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| 41 | uint8_t buffer[2]; |
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| 41 | mjames | 42 | |
| 45 | mjames | 43 | nextTempCS(); |
| 44 | HAL_SPI_Receive(&hspi1, buffer, 2, 2); |
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| 6 | mjames | 45 | |
| 45 | mjames | 46 | uint16_t obs = (buffer[0] << 8) | buffer[1]; |
| 6 | mjames | 47 | |
| 45 | mjames | 48 | // good observation if the status bit is clear, and the reading is less than 1023 |
| 6 | mjames | 49 | |
| 45 | mjames | 50 | uint16_t temp_c = obs >> 5; |
| 6 | mjames | 51 | |
| 55 | mjames | 52 | if (((obs & 7) == 0) && (temp_c > 0) && (temp_c < 250)) |
| 53 | AddTempReading(temp_c, instance); |
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| 45 | mjames | 54 | } |
| 55 | nextTempCS(); // clock CS one more time to deselect all chips |
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| 31 | mjames | 56 | } |
| 45 | mjames | 57 | } |
| 6 | mjames | 58 | } |
| 59 | |||
| 37 | mjames | 60 | // 100mS periodic sampler handler |
| 45 | mjames | 61 | void TIM4_IRQHandler(void) |
| 37 | mjames | 62 | { |
| 63 | static char blink = 0; |
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| 64 | if (__HAL_TIM_GET_FLAG(&htim4, TIM_FLAG_UPDATE)) |
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| 45 | mjames | 65 | { |
| 66 | __HAL_TIM_CLEAR_FLAG(&htim4, TIM_FLAG_UPDATE); |
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| 37 | mjames | 67 | |
| 45 | mjames | 68 | blink = !blink; |
| 69 | HAL_GPIO_WritePin(LED_Blink_GPIO_Port, LED_Blink_Pin, |
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| 70 | blink ? GPIO_PIN_SET : GPIO_PIN_RESET); |
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| 37 | mjames | 71 | |
| 45 | mjames | 72 | if (periodPulse == 1) |
| 73 | { |
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| 74 | triggerTim3(); |
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| 37 | mjames | 75 | } |
| 45 | mjames | 76 | // indicate that timer 4 firing is owning the timer 3 trigger |
| 77 | periodPulse = 1; |
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| 37 | mjames | 78 | |
| 45 | mjames | 79 | chtTimer++; |
| 80 | } |
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| 37 | mjames | 81 | } |