Sergii Kaplia / Mbed 2 deprecated Internal_Temperature_F103RB1

test

Dependencies:   mbed LIS3DH_spi

main.cpp@8:ee559cfe0a28, 2020-12-22 (annotated)

Committer:
kapliasergii
Date:
Tue Dec 22 19:58:40 2020 +0000
Revision:
8:ee559cfe0a28
Parent:
7:fabc8bd0dbcd 
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
hudakz 2:bd6594739176 1 /*
hudakz 4:f5c604b5eceb 2 * Reading built-in temperature sensor of STM32F103RB chip (on a NUCLEO-F103RB board)
hudakz 2:bd6594739176 3 */
hudakz 0:dfdf46225b14 4
hudakz 0:dfdf46225b14 5 #include "mbed.h"
kapliasergii 7:fabc8bd0dbcd 6 #include "LIS3DH.h"
hudakz 0:dfdf46225b14 7
kapliasergii 7:fabc8bd0dbcd 8
kapliasergii 7:fabc8bd0dbcd 9 #define MOSI PA_7
kapliasergii 7:fabc8bd0dbcd 10 #define MISO PA_6
kapliasergii 7:fabc8bd0dbcd 11 #define CS PA_4
kapliasergii 7:fabc8bd0dbcd 12 #define SCLK PA_5
kapliasergii 7:fabc8bd0dbcd 13
kapliasergii 7:fabc8bd0dbcd 14
kapliasergii 7:fabc8bd0dbcd 15
kapliasergii 7:fabc8bd0dbcd 16
kapliasergii 7:fabc8bd0dbcd 17 LIS3DH acc(MOSI, MISO, SCLK, CS, LIS3DH_DR_NR_LP_50HZ, LIS3DH_FS_2G);
kapliasergii 7:fabc8bd0dbcd 18
kapliasergii 7:fabc8bd0dbcd 19 /*
hudakz 2:bd6594739176 20 * STM32F103x data-sheet:
kapliasergii 7:fabc8bd0dbcd 21 * 5.3.19 Temperature sensor characteristics
hudakz 2:bd6594739176 22 * Table 50. TS characteristics, Page 80
hudakz 2:bd6594739176 23 */
kapliasergii 7:fabc8bd0dbcd 24 const float AVG_SLOPE = 10E-03; // slope (gradient) of temperature line function [V/°C]
kapliasergii 7:fabc8bd0dbcd 25 const float V25 = 0.75; // sensor's output voltage at 25°C [V]
kapliasergii 7:fabc8bd0dbcd 26 const float ADC_TO_VOLT = 3.3 / 4096; // conversion coefficient of digital value to voltage [V]
kapliasergii 7:fabc8bd0dbcd 27 // when using 3.3V ref. voltage at 12-bit resolution (2^12 = 4096)
kapliasergii 7:fabc8bd0dbcd 28
kapliasergii 7:fabc8bd0dbcd 29
hudakz 0:dfdf46225b14 30
kapliasergii 7:fabc8bd0dbcd 31 float accX = 0;
kapliasergii 7:fabc8bd0dbcd 32 float accY = 0;
kapliasergii 7:fabc8bd0dbcd 33 float accZ = 0;
kapliasergii 7:fabc8bd0dbcd 34
kapliasergii 7:fabc8bd0dbcd 35
kapliasergii 7:fabc8bd0dbcd 36
kapliasergii 7:fabc8bd0dbcd 37
kapliasergii 7:fabc8bd0dbcd 38 Serial pc(PA_9, PA_10);
hudakz 5:27071c2166bb 39 DigitalOut led(PC_13);
hudakz 4:f5c604b5eceb 40 ADC_HandleTypeDef hadc1; // ADC handle
hudakz 4:f5c604b5eceb 41 uint16_t adcValue; // digital value of sensor
hudakz 4:f5c604b5eceb 42 float vSense; // sensor's output voltage [V]
hudakz 4:f5c604b5eceb 43 float temp; // sensor's temperature [°C]
hudakz 0:dfdf46225b14 44
hudakz 0:dfdf46225b14 45 /* ADC1 init function */
hudakz 5:27071c2166bb 46 void MX_ADC1_Init(void)
hudakz 5:27071c2166bb 47 {
kapliasergii 7:fabc8bd0dbcd 48 pc.baud(115200);
kapliasergii 7:fabc8bd0dbcd 49 pc.format(8,SerialBase::Odd,1);
hudakz 0:dfdf46225b14 50 ADC_ChannelConfTypeDef sConfig;
hudakz 0:dfdf46225b14 51
hudakz 0:dfdf46225b14 52 /**Common config
hudakz 0:dfdf46225b14 53 */
hudakz 0:dfdf46225b14 54 hadc1.Instance = ADC1;
hudakz 0:dfdf46225b14 55 hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE;
hudakz 0:dfdf46225b14 56 hadc1.Init.ContinuousConvMode = DISABLE;
hudakz 0:dfdf46225b14 57 hadc1.Init.DiscontinuousConvMode = DISABLE;
hudakz 0:dfdf46225b14 58 hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
hudakz 0:dfdf46225b14 59 hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
hudakz 0:dfdf46225b14 60 hadc1.Init.NbrOfConversion = 1;
hudakz 0:dfdf46225b14 61 HAL_ADC_Init(&hadc1);
hudakz 0:dfdf46225b14 62
hudakz 0:dfdf46225b14 63 /**Configure Regular Channel
hudakz 0:dfdf46225b14 64 */
kapliasergii 7:fabc8bd0dbcd 65 sConfig.Channel = 9;
hudakz 0:dfdf46225b14 66 sConfig.Rank = 1;
hudakz 0:dfdf46225b14 67 sConfig.SamplingTime = ADC_SAMPLETIME_239CYCLES_5;
hudakz 0:dfdf46225b14 68 HAL_ADC_ConfigChannel(&hadc1, &sConfig);
hudakz 0:dfdf46225b14 69 }
hudakz 0:dfdf46225b14 70
kapliasergii 7:fabc8bd0dbcd 71
kapliasergii 7:fabc8bd0dbcd 72
kapliasergii 7:fabc8bd0dbcd 73 // When characteristic input changing
kapliasergii 7:fabc8bd0dbcd 74 void Accupdate()
kapliasergii 7:fabc8bd0dbcd 75 {
kapliasergii 7:fabc8bd0dbcd 76
kapliasergii 7:fabc8bd0dbcd 77 accX = float(short((acc.read_reg(LIS3DH_OUT_X_H) << 8) | acc.read_reg(LIS3DH_OUT_X_L))) * 0.001F / 15;
kapliasergii 7:fabc8bd0dbcd 78 accY = float(short((acc.read_reg(LIS3DH_OUT_Y_H) << 8) | acc.read_reg(LIS3DH_OUT_Y_L))) * 0.001F / 15;
kapliasergii 7:fabc8bd0dbcd 79 accZ = float(short((acc.read_reg(LIS3DH_OUT_Z_H) << 8) | acc.read_reg(LIS3DH_OUT_Z_L))) * 0.001F / 15;
kapliasergii 7:fabc8bd0dbcd 80
kapliasergii 7:fabc8bd0dbcd 81
kapliasergii 7:fabc8bd0dbcd 82 pc.printf("X acceleration = ");
kapliasergii 7:fabc8bd0dbcd 83 pc.printf("%5.2f",accX);
kapliasergii 7:fabc8bd0dbcd 84 pc.printf("Y acceleration = ");
kapliasergii 7:fabc8bd0dbcd 85 pc.printf("%5.2f",accY);
kapliasergii 7:fabc8bd0dbcd 86 pc.printf("Z acceleration = ");
kapliasergii 7:fabc8bd0dbcd 87 pc.printf("%5.2f",accZ);
kapliasergii 7:fabc8bd0dbcd 88 }
kapliasergii 7:fabc8bd0dbcd 89
kapliasergii 7:fabc8bd0dbcd 90
hudakz 5:27071c2166bb 91 int main()
hudakz 5:27071c2166bb 92 {
hudakz 4:f5c604b5eceb 93 MX_ADC1_Init(); // initialize AD convertor
hudakz 4:f5c604b5eceb 94 while(HAL_ADCEx_Calibration_Start(&hadc1) != HAL_OK); // calibrate AD convertor
hudakz 0:dfdf46225b14 95
kapliasergii 7:fabc8bd0dbcd 96 while(1) {
hudakz 4:f5c604b5eceb 97 HAL_ADC_Start(&hadc1); // start analog to digital conversion
hudakz 4:f5c604b5eceb 98 while(HAL_ADC_PollForConversion(&hadc1, 1000000) != HAL_OK);// wait for completing the conversion
hudakz 4:f5c604b5eceb 99 adcValue = HAL_ADC_GetValue(&hadc1); // read sensor's digital value
hudakz 4:f5c604b5eceb 100 vSense = adcValue * ADC_TO_VOLT; // convert sensor's digital value to voltage [V]
hudakz 2:bd6594739176 101 /*
hudakz 2:bd6594739176 102 * STM32F103xx Reference Manual:
hudakz 2:bd6594739176 103 * 11.10 Temperature sensor
hudakz 2:bd6594739176 104 * Reading the temperature, Page 235
hudakz 4:f5c604b5eceb 105 * Temperature (in °C) = {(V25 - Vsense) / Avg_Slope} + 25
hudakz 2:bd6594739176 106 */
kapliasergii 7:fabc8bd0dbcd 107 temp = (vSense - V25) / AVG_SLOPE + 25.0f; // convert sensor's output voltage to temperature [°C]
kapliasergii 7:fabc8bd0dbcd 108 pc.printf("temp = %3.1f%cC, voltage = %f\n", temp, 176, vSense); // display chip's temperature [°C]
kapliasergii 7:fabc8bd0dbcd 109 Accupdate();
hudakz 0:dfdf46225b14 110 wait_ms(1000);
kapliasergii 7:fabc8bd0dbcd 111 }
hudakz 0:dfdf46225b14 112 }