app_display.c File Reference

Implementation of state machine of LCD. More...

#include "bsp.h"
#include "app_display.h"
#include "hel_lcd.h"

Data Structures
struct	DisplayNode
	Struct for store function for each state of event machine. More...

Functions
static void	Display_Machine (APP_MsgTypeDef *DisplayMsg)
	Initializate the State machine of Display.
static Display_M	Time (APP_MsgTypeDef *DisplayMsg)
	Display the current time on the LCD.
static Display_M	Date (APP_MsgTypeDef *DisplayMsg)
	Display the current Date on the LCD.
static void	TimeString (char *string, uint8_t hours, uint8_t minutes, uint8_t seconds)
	Function to convert time to a string representation.
static void	DateString (char *string, uint8_t month, uint8_t day, uint16_t year, uint8_t weekday)
	Function to convert date to a string representation.
static char *	get_month (uint8_t month)
	Get the abbreviation of the month.
static Display_M	Alarm_A (APP_MsgTypeDef *DisplayMsg)
	Prints the letter A.
static Display_M	Alarm (APP_MsgTypeDef *DisplayMsg)
	Prints the ALARM!!!
static Display_M	Alarm_Clean (APP_MsgTypeDef *DisplayMsg)
	Clean Alarm.
static void	Display_Buzzer (TimerHandle_t pxTimer)
	Function for sotware timer of the buzzer.
static void	Display_1Mn_Buzzer (TimerHandle_t pxTimer)
	Function for software timer for the 1mn of the alarm.
void	Display_Init (void)
	Initializate the LCD.
void	Display_Task (void)
	Display task function.

Variables
LCD_HandleTypeDef	Hlcd
	Variable for LCD configuration.
SPI_HandleTypeDef	SpiHandle
	Variable for SPI configuration.
static TIM_HandleTypeDef	TimHandle
	Strucuture that gives format to timer.
uint8_t	buzzer_flag = 0
	Flag that will tell if the buzzer needs to be activated.
uint8_t	buzzer = 0
	Flag that will tell if the buzzer needs to be activated.
static TimerHandle_t	xTimerBuzzer
	Struct for handling Software timer for the buzzer.
static TimerHandle_t	xTimer1Mn_Buzzer
	Struct for handling Software timer for 1mn for the buzzer.

Detailed Description

Implementation of state machine of LCD.

In this file we are going to see the initialization of the lcd and the application

Function Documentation

Alarm()

static Display_M Alarm ( APP_MsgTypeDef * DisplayMsg )

static

Prints the ALARM!!!

< precompilation direcctive

This function prints ALARM!!! when the alarm has been activated. Furthermore, it indicates that the buzzer must be activated

Parameters

DisplayMsg

A pointer to the message structure containing state information

Returns

DISPLAY_2: State for testing and knowing a message have been sent

< precompilation direcctive

< Buzzer state

< Buzzer state

< Brief description

Alarm_A()

static Display_M Alarm_A ( APP_MsgTypeDef * DisplayMsg )

static

Prints the letter A.

< precompilation direcctive

This function prints the letter A when the alarm has been setted

Parameters

DisplayMsg

A pointer to the message structure containing state information

Returns

DISPLAY_1: State for testing and knowing a message have been sent

< precompilation direcctive

Alarm_Clean()

static Display_M Alarm_Clean ( APP_MsgTypeDef * DisplayMsg )

static

Clean Alarm.

< precompilation direcctive

This function prints stop and turn off before the one-minute lapse expire by receiving a new date, time, or alarm through the CAN bus

Parameters

DisplayMsg

A pointer to the message structure containing state information

Returns

DISPLAY_3: State for testing and knowing a message have been sent

< precompilation direcctive

< Buzzer state

< Buzzer state

< The maximum amount of time

< The maximum amount of time

< Brief description

< The maximum amount of time

Date()

static Display_M Date ( APP_MsgTypeDef * DisplayMsg )

static

Display the current Date on the LCD.

< precompilation direcctive

This function rettrieves the curren date from the Clockmsg structure and formats it as a string in the format 000,00 0000 00

Parameters

DisplayMsg

A pointer to the message structure containing state information

Returns

DISPLAY_IDLE_STATE: State for testing, even though it doesnt make the transition of another state it must return to IDLE

< precompilation direcctive

DateString()

static void DateString ( char * string, uint8_t month, uint8_t day, uint16_t year, uint8_t weekday )

static

Function to convert date to a string representation.

< precompilation direcctive

This function takes time values for year, month, day, weekday and formats them into a string

Parameters

string	Pointer to a character buffer to store the formatted date
month	Month (1-12)
day	Day of the month (1-31)
year	Year
weekday	Weekday(0-6), where 0 is Sunday and 6 is Saturday

< precompilation direcctive

< Position 0: First character of the month

< Position 0: First character of the month

< Position 1: Second character of the month

< Position 1: Second character of the month

< Position 2: First character of the month

< Position 2: First character of the month

< Position 4: Tens digits of the day

< Value for counter: 10

< Value for counter: 10

< Position 5: Ones digits of the day

< Value for counter: 10

< Position 7: Thousands digit of the year

< Value for counter: 1000

< Value for counter: 10

< Position 8: Hundreds digit of the year

< Value for counter: 100

< Value for counter: 10

< Position 9: Tens digit of the year

< Value for counter: 10

< Value for counter: 10

< Position 10: Ones digit of the year

< Value for counter: 10

< Position 12: First character of the week

< Value for counter: 0

< Position 13: Second character of the week

< Value for counter: 1

Display_1Mn_Buzzer()

static void Display_1Mn_Buzzer ( TimerHandle_t pxTimer )

static

Function for software timer for the 1mn of the alarm.

< precompilation direcctive

This function after 1mn the alarm will be desactivated either by the time or by other message

Parameters

pxTimer

Timer handler

< precompilation direcctive

< Buzzer state

< The maximum amount of time

< Brief description

Display_Buzzer()

static void Display_Buzzer ( TimerHandle_t pxTimer )

static

Function for sotware timer of the buzzer.

< precompilation direcctive

Parameters

pxTimer

Timer handler

This function with the help of the alarm that has been triggered, start to blink the LCD and making blink the buzzer

< precompilation direcctive

< Buzzer state

< Buzzer state

< Buzzer state

< Brief description

< Buzzer state

< Brief description

Display_Init()

void Display_Init

(

void

)

Initializate the LCD.

This function gives the format of spi and initializate the lcd

< Brief description

< ID for timer used to update display

< The maximum amount of time

< ID for timer used to update display

< The maximum amount of time

Display_Machine()

static void Display_Machine ( APP_MsgTypeDef * DisplayMsg )

static

Initializate the State machine of Display.

This function initializes the state machine for the Display module. It sets up an array of state functions and transitions to the initial state

Parameters

DisplayMsg

A pointer to the message structure containing state information

< Total states in event machine

Display_Task()

void Display_Task

(

void

)

Display task function.

This function checks the queue of pending tasks every 100ms and process them calling the display machine

get_month()

static char * get_month ( uint8_t month )

static

Get the abbreviation of the month.

< precompilation direcctive

This function returns the abbreviation of a month given its number

Parameters

month

Month number (1-12)

Returns

Pointer to the month abbreviation or NULL if the month number is invalid

< precompilation direcctive

< Value for counter: 1

< Value for counter: 12

< Value for counter: 1

Time()

static Display_M Time ( APP_MsgTypeDef * DisplayMsg )

static

Display the current time on the LCD.

< precompilation direcctive

This function rettrieves the curren time from the Clockmsg structure and formats it as a string in the format 00:00:00

Parameters

DisplayMsg

A pointer to the message structure containing state information

Returns

DISPLAY_MSG_TIME: State for testing and knowing a message have been sent

< precompilation direcctive

TimeString()

static void TimeString ( char * string, uint8_t hours, uint8_t minutes, uint8_t seconds )

static

Function to convert time to a string representation.

< precompilation direcctive

This function takes time values for hours, minutes, seconds and formats them into a string

Parameters

string	Pointer to a character buffer to store the formatted time
hours	Hours in 24-hour format (0-23)
minutes	Minutes (0-59)
seconds	Seconds (0-59)

< precompilation direcctive

< Position 7: Seconds ones digit

< Value for counter: 10

< Position 6: Seconds tens digit

< Value for counter: 10

< Position 5: Minutes ones digit

< Value for counter: 10

< Position 4: Minutes tens digit

< Value for counter: 10

< Position 3: Hours ones digit

< Value for counter: 10

< Position 1: Hours tens digit

< Value for counter: 10