app_lcd.c

/*
 * File:   app_lcd.c
 * Author: M91406
 *
 * Created on March 12, 2020, 12:10 PM
 */
 
#include "lcd/app_lcd.h"
#include <math.h>
 
// Additional header files required by this task
#include "config/apps.h"
#include "config/hal.h"
 
// PRIVATE VARIABLE DELARATIONS
 
volatile struct LCD_s lcd;      // declare one LCD data object
 
 
volatile uint16_t lcd_cnt = 0;  
 // end of group app-layer-lcd-properties-private
 
 
#define LCD_STARTUP   30000     
 // end of group app-layer-lcd-properties-private
 
 
#define LCD_REFRESH   2000      
 // end of group app-layer-lcd-properties-private
 
 
#define LCD_NO_OF_SCREENS   3   
 // end of group app-layer-lcd-properties-private
 
 
volatile uint16_t appLCD_Initialize(void) 
{
    volatile uint16_t retval = 1;
    
    if (lcd.refresh == 0)
        lcd.refresh = LCD_STARTUP;
    
    lcd.screens = LCD_NO_OF_SCREENS;
    
    dev_Lcd_Initialize();
    dev_Lcd_WriteStringXY(0,0,"==== DPSK-3 ====");
    dev_Lcd_WriteStringXY(0,1,"   BUCK  PCMC   ");
 
    lcd_cnt = 0;
    lcd.enabled = true;
    
    return(retval);
}
 
 
volatile uint16_t appLCD_Execute(void) 
{
    volatile uint16_t retval = 1;
    volatile float vi=0.0, vo=0.0, isns=0.0, temp=0.0;
    
    // IF LCD output is disabled, exit here
    if(!lcd.enabled)
        return(retval);
    
    // Refresh LCD and reset refresh counter
    lcd_cnt++;
    
    // If REFRESH period has expired, update LCD contents
    if(lcd_cnt == lcd.refresh) {
        
        // Calculate output values
        vi = ((buck.data.v_in << 3) * ADC_GRANULARITY); // Scale ADC value to physical unit
        vi = (float)(int)(100.0 * vi);      // Rounding operation required to prevent display
        vi /= 100.0;                        // rounding issues around 9.99 and 10.0 ° C
 
        // Input voltage display
        if((double)vi < 10.000)
            PrintLcd(0, "VIN     = %2.2f V", (double)vi);
        else
            PrintLcd(0, "VIN     = %2.1f V", (double)vi);
 
        switch (lcd.screen)
        {
            case 1:     // Show Temperature Output
 
                temp = ((float)(buck.data.temp - TEMP_FB_ZERO) / TEMP_FB_SLOPE); // Scale ADC value to physical unit
                temp = (float)(int)(100.0 * temp);  // Rounding operation required to prevent display 
                temp /= 100.0;                      // rounding issues around 9.99 and 10.0 V
 
                if((double)temp < 10.000)
                    PrintLcd(1, "TEMP    = %2.2f C", (double)temp);
                else
                    PrintLcd(1, "TEMP    = %2.1f C", (double)temp);
                break;
            
            case 2:     // Show Current Output
 
                isns = ((buck.data.i_out * ADC_GRANULARITY) /  BUCK_ISNS_FEEDBACK_GAIN); // Scale ADC value to physical unit
 
                if((double)isns < 1.000)
                {
                    isns *= 1000.0;
                    PrintLcd(1, "ISNS    = %3d mA", (int)isns);
                }
                else
                {
                    PrintLcd(1, "ISNS    = %1.2f A", (double)isns);
                }
                break;
 
            case 3:     // Firmware Version Number
                PrintLcd(1, "Firmware: %s", FIRMWARE_VERSION_STRING);
                break;
 
            default:    // Output voltage display
                
                vo = ((buck.data.v_out << 1) * ADC_GRANULARITY); // Scale ADC value to physical unit
 
                if((double)vo < 10.000)
                    PrintLcd(1, "VOUT    = %2.2f V", (double)vo);
                else
                    PrintLcd(1, "VOUT    = %2.1f V", (double)vo);
 
                break;
        }
        
        // Add Error Indicators
        if ((lcd.screen<lcd.screens) && (buck.status.bits.fault_active))
        {
            if (fltobj_BuckUVLO.Status.bits.FaultStatus)
                dev_Lcd_WriteStringXY(4, 1, "(UV)");
            else if (fltobj_BuckOVLO.Status.bits.FaultStatus)
                dev_Lcd_WriteStringXY(4, 1, "(OV)");
            else if (fltobj_BuckRegErr.Status.bits.FaultStatus)
                dev_Lcd_WriteStringXY(4, 1, "(RE)");
            else if (fltobj_BuckOCP.Status.bits.FaultStatus)
                dev_Lcd_WriteStringXY(4, 1, "(OC)");
            else 
                dev_Lcd_WriteStringXY(4, 1, "(LA)");
        }
 
        // Trigger LCD Refresh
        lcd.refresh = LCD_REFRESH;
        lcd_cnt = 0; // Reset internal interval counter
    }
    
    return(retval);
}
 
 
volatile uint16_t appLCD_Dispose(void) 
{
    volatile uint16_t retval = 1;
    
    /* PLACE DISPOSE CODE HERE */
 
    return(retval);
}
 
// end of file