UI::Display Class Reference

#include <ui.h>

Public Member Functions
void	init ()
void	log (uint8_t *text)
void	clear_line (int line_no)
void	update_stats (mbed_stats_cpu_t *stats, int sample_time_ms)

Detailed Description

Definition at line 8 of file ui.h.

Member Function Documentation

clear_line()

void Display::clear_line

(

int

line_no

)

Clears a line on the display

Return values

void

Definition at line 24 of file ui.cpp.

                                    {
  BSP_LCD_DisplayStringAt(0, LINE(line_no), (uint8_t *)"                                              ", LEFT_MODE);
  BSP_LCD_DisplayStringAt(0, LINE(line_no), (uint8_t *)"                                              ", CENTER_MODE);
  BSP_LCD_DisplayStringAt(0, LINE(line_no), (uint8_t *)"                                              ", RIGHT_MODE);
 
  // this doesn't appear to work properly?
  BSP_LCD_ClearStringLine(LINE(line_no));
}

Referenced by log(), and update_stats().

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init()

void Display::init

(

)

Initialize the display

Return values

void

Definition at line 33 of file ui.cpp.

                   {
  BSP_LCD_Init();
  BSP_LCD_LayerDefaultInit(LTDC_ACTIVE_LAYER, LCD_FB_START_ADDRESS);
  BSP_LCD_SelectLayer(LTDC_ACTIVE_LAYER);
 
  BSP_LCD_SetFont(&Font16);
  BSP_LCD_Clear(LCD_COLOR_BLACK);
  BSP_LCD_SetBackColor(LCD_COLOR_BLACK);
  BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
 
  BSP_LCD_DisplayStringAt(2, 2, (uint8_t *)"greenhouse (server)", LEFT_MODE);
  BSP_LCD_DrawHLine(0, 20, 480);
 
  set_default_font();
 
  BSP_LCD_DrawHLine(0, LINE(LOG_Y_POS - 1) - 1, 480);
  BSP_LCD_DisplayStringAt(10, LINE(LOG_Y_POS) - 12, (uint8_t *)"console", LEFT_MODE);
  BSP_LCD_DrawHLine(0, LINE(LOG_Y_POS), 480);
}

References LOG_Y_POS, and set_default_font().

Referenced by main().

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log()

void Display::log

(

uint8_t *

text

)

Write a log message to the display

Parameters

text	Text to write

Return values

void

Definition at line 53 of file ui.cpp.

                               {
  if (log_idx > MAX_LOG_LINES) {
    // Clear display
    for (int i = 1; i < 10; i++) {
      clear_line(LINE(i + LOG_Y_POS));
    }
 
    log_idx = 0;
  }
 
  ++log_idx;
 
  BSP_LCD_DisplayStringAt(10, LINE(log_idx + LOG_Y_POS), text, LEFT_MODE);
}

References clear_line(), log_idx, LOG_Y_POS, and MAX_LOG_LINES.

Referenced by Tasks::Storage::example(), and main().

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update_stats()

void Display::update_stats	(	mbed_stats_cpu_t *	stats,
		int	sample_time_ms
	)

Update stats display

Parameters

stats	pointer to mbed_stats_cpu_t
sample_time_ms	Polling time in milliseconds. Used for calculating usage percentage.

Return values

void

Definition at line 88 of file ui.cpp.

                                                                      {
  clear_line(3);
  clear_line(4);
 
  string uptime = make_stat_str("Uptime: ", "s", stats->uptime);
  string idle_time = make_stat_str("Idle: ", "s", stats->idle_time);
  string sleep = make_stat_str("Sleep: ", "s", stats->sleep_time);
  string deep_sleep = make_stat_str("Deep sleep: ", "s", stats->deep_sleep_time);
 
  BSP_LCD_DisplayStringAt(25, LINE(3), (uint8_t *)uptime.c_str(), LEFT_MODE);
  BSP_LCD_DisplayStringAt(120, LINE(3), (uint8_t *)idle_time.c_str(), LEFT_MODE);
  BSP_LCD_DisplayStringAt(205, LINE(3), (uint8_t *)sleep.c_str(), LEFT_MODE);
  BSP_LCD_DisplayStringAt(300, LINE(3), (uint8_t *)deep_sleep.c_str(), LEFT_MODE);
 
  uint64_t diff_usec = (stats->idle_time - prev_idle_time);
  uint8_t idle = (diff_usec * 100) / (sample_time_ms*1000);
  uint8_t usage = 100 - ((diff_usec * 100) / (sample_time_ms*1000));
  prev_idle_time = stats->idle_time;
 
  string usage_str = string("Usage: ");
  usage_str.append(std::to_string(usage));
  usage_str.append("%");
  
  BSP_LCD_DisplayStringAt(25, LINE(4), (uint8_t *)usage_str.c_str(), LEFT_MODE);
}

References clear_line(), make_stat_str(), and prev_idle_time.

Referenced by collect_stats().

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The documentation for this class was generated from the following files:

• include/ui/ui.h
• source/ui/ui.cpp