TUKS MCU Introductory course / TUKS-COURSE-THERMOMETER

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of TUKS-COURSE-TIMER by TUKS MCU Introductory course

main.c

Committer:
elmot
Date:
2017-02-25
Revision:
3:b69e098b4613
Parent:
2:5acdd8565d02

File content as of revision 3:b69e098b4613:

#define USE_STM32L476G_DISCO_REVC
#include "stm32l476g_discovery.h"
#include "stm32l476g_discovery_glass_lcd.h"


/************** TODO **********************
 - Find and fix bug in ADC initialization code
 - Perform actual measurement
 - Output actual calibrated temperature value (RTFM)
*/
int main()
{
    //Init and test LCD
    BSP_LCD_GLASS_Init();
    BSP_LCD_GLASS_DisplayBar(LCD_BAR_3);
    
    __HAL_RCC_ADC_CLK_ENABLE();
    __HAL_RCC_ADC_FORCE_RESET();
    __HAL_RCC_ADC_RELEASE_RESET();
    __HAL_RCC_ADC_CONFIG(RCC_ADCCLKSOURCE_SYSCLK);
    
    ADC_HandleTypeDef hAdc;
    hAdc.Instance = ADC1;
    hAdc.Init.ClockPrescaler = ADC_CLOCK_ASYNC_DIV256;
    hAdc.Init.Resolution = ADC_RESOLUTION_12B;
    hAdc.Init.DataAlign  = ADC_DATAALIGN_RIGHT;
    hAdc.Init.ScanConvMode = ADC_SCAN_DISABLE;
    hAdc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
    hAdc.Init.LowPowerAutoWait = DISABLE;
    hAdc.Init.ContinuousConvMode = DISABLE;
    hAdc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
    hAdc.Init.Overrun = ADC_OVR_DATA_OVERWRITTEN;
    hAdc.Init.OversamplingMode = DISABLE;
    
    ADC_ChannelConfTypeDef adcChannel;
    adcChannel.Channel = ADC_CHANNEL_VBAT;
    adcChannel.Rank = ADC_REGULAR_RANK_1;
    adcChannel.SamplingTime = ADC_SAMPLETIME_247CYCLES_5;
    adcChannel.SingleDiff = ADC_SINGLE_ENDED;
    adcChannel.OffsetNumber = ADC_OFFSET_NONE;
    
    HAL_ADC_Init(&hAdc);
    HAL_ADC_ConfigChannel(&hAdc,&adcChannel);
    
    HAL_ADCEx_Calibration_Start(&hAdc,ADC_SINGLE_ENDED);

    while(1)   {
        /// TBD: Start ADC, wait for end of onversion, read value
        uint8_t text[7];
        
        snprintf((char *)text, sizeof text,"%+04d~C", -999);
        BSP_LCD_GLASS_DisplayChar(&text[0], POINT_OFF, DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_1);
        BSP_LCD_GLASS_DisplayChar(&text[1], POINT_OFF, DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_2);
        BSP_LCD_GLASS_DisplayChar(&text[2], POINT_ON, DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_3);
        BSP_LCD_GLASS_DisplayChar(&text[3], POINT_OFF, DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_4);
        BSP_LCD_GLASS_DisplayChar(&text[4], POINT_OFF, DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_5);
        BSP_LCD_GLASS_DisplayChar(&text[5], POINT_OFF, DOUBLEPOINT_OFF,LCD_DIGIT_POSITION_6);
        HAL_Delay(500);
    }
}