Detailed Description

Segment LCD driver.

This driver implements symbol and string write support for EFM32 kits with segment LCD.

Data Structures
struct	ARING_TypeDef
	Defines segment COM and BIT fields for A-wheel (suited for Anim)

struct	ARRAY_TypeDef
	Defines segment COM and BIT fields for array.

struct	BATTERY_TypeDef
	Defines segment COM and BIT fields for Battery (suited for Anim)

struct	Block_TypeDef
	Defines segment COM and BIT fields for top and bottom row blocks. The bit pattern shown above for characters can be split into upper and lower portions for animation purposes. There are separate COM and BIT numbers which together represent a set of stacked blocks which can be shown on two rows in the segmented LCD screen.

struct	CHAR_TypeDef
	Defines each text symbol's segment in terms of COM and BIT numbers, in a way that we can enumerate each bit for each text segment in the following bit pattern:

struct	EM_TypeDef
	Defines segment COM and BIT fields for Energy Modes on display.

struct	MCU_DISPLAY
	Defines prototype for all segments in display.

struct	NUMBER_TypeDef
	Defines segment COM and BIT fields numeric display.

Macros
#define	ALPHA_DIGITS 7

#define	ALPHA_VAL_MAX 9999999

#define	ALPHA_VAL_MIN -9999999

#define	NUM_DIGITS 4

#define	NUM_VAL_MAX 9999

#define	NUM_VAL_MAX_HEX 0xFFFF

#define	NUM_VAL_MIN -999

#define	SEGMENT_LCD_BLOCK_MODE_BLANK 0

#define	SEGMENT_LCD_BLOCK_MODE_FILL 1

#define	SEGMENT_LCD_BLOCK_MODE_OUTLINE 2

#define	SEGMENT_LCD_BLOCK_MODE_OUTLINE_FILL 3

#define	SEGMENT_LCD_NUM_BLOCK_COLUMNS 7

Enumerations
enum	SegmentLCD_BlockMode_TypeDef { segmentLCDBlockModeBlank = SEGMENT_LCD_BLOCK_MODE_BLANK, segmentLCDBlockModeFill = SEGMENT_LCD_BLOCK_MODE_FILL, segmentLCDBlockModeOutline = SEGMENT_LCD_BLOCK_MODE_OUTLINE, segmentLCDBlockModeOutlineFill = SEGMENT_LCD_BLOCK_MODE_OUTLINE_FILL }

Functions
static void	displayBlock ( SegmentLCD_BlockMode_TypeDef topMode[SEGMENT_LCD_NUM_BLOCK_COLUMNS], SegmentLCD_BlockMode_TypeDef botMode[SEGMENT_LCD_NUM_BLOCK_COLUMNS])
	Working instance of LCD display.

void	SegmentLCD_AllOff (void)
	Disable all segments.

void	SegmentLCD_AllOn (void)
	Enable all segments.

void	SegmentLCD_AlphaNumberOff (void)
	Turn all segments on alpha characters in display off.

void	SegmentLCD_ARing (int anum, int on)
	Light up or shut off Ring of Indicators.

void	SegmentLCD_Battery (int batteryLevel)
	Light up or shut off Battery Indicator.

void	SegmentLCD_Block ( SegmentLCD_BlockMode_TypeDef topMode[SEGMENT_LCD_NUM_BLOCK_COLUMNS], SegmentLCD_BlockMode_TypeDef botMode[SEGMENT_LCD_NUM_BLOCK_COLUMNS])

void	SegmentLCD_Disable (void)
	Disables LCD controller.

void	SegmentLCD_EnergyMode (int em, int on)
	Light up or shut off Energy Mode indicator.

void	SegmentLCD_Init (bool useBoost)
	Segment LCD Initialization routine for EFM32 STK display.

void	SegmentLCD_LowerHex (uint32_t num)
	Write a hexadecimal number on lower alphanumeric part of Segment LCD display.

void	SegmentLCD_LowerNumber (int num)
	Write number on lower alphanumeric part of Segment LCD display.

void	SegmentLCD_Number (int value)
	Write number on numeric part on Segment LCD display.

void	SegmentLCD_NumberOff (void)
	Turn all segments on numeric digits in display off.

unsigned int	SegmentLCD_segCnt (unsigned int segdl, unsigned int segdh)
	Counting the number of active segments in a single common line.

void	SegmentLCD_Symbol (lcdSymbol s, int on)
	Light up or shut off various symbols on Segment LCD.

void	SegmentLCD_UnsignedHex (uint32_t value)
	Write hexadecimal number on numeric part on Segment LCD display.

void	SegmentLCD_Write (const char *string)
	Write text on LCD display.

Variables
static const uint16_t	Blocks []
	Defines highlighted segments for the block display.

static const MCU_DISPLAY	EFM_Display = EFM_DISPLAY_DEF
	Working instance of LCD display.

static const uint16_t	Segment_Alphabet []
	Defines higlighted segments for the alphabet, starting from "blank" (SPACE) Uses bit pattern as defined for text segments above. E.g. a capital O, would have bits 0 1 2 3 4 5 => 0x003f defined.

static const uint16_t	Segment_Numbers []
	Defines higlighted segments for the numeric display.

Enumeration Type Documentation

enum SegmentLCD_BlockMode_TypeDef

Enumerator
segmentLCDBlockModeBlank	Blank
segmentLCDBlockModeFill	Fill
segmentLCDBlockModeOutline	Outline
segmentLCDBlockModeOutlineFill	Outline and fill

Definition at line 52 of file segmentlcd.h .

Function Documentation

static void displayBlock	(	SegmentLCD_BlockMode_TypeDef	`topMode[SEGMENT_LCD_NUM_BLOCK_COLUMNS],`
		SegmentLCD_BlockMode_TypeDef	`botMode[SEGMENT_LCD_NUM_BLOCK_COLUMNS]`
	)

static

Working instance of LCD display.

Enabling/disabling dynamic charge redistribution.

Parameters

true ==> enable, false ==> disable

Dynamically switching charge redistribution ON/OFF based on display contents

Parameters

None

Definition at line 1310 of file segmentlcd.c .

References Block_TypeDef::bit , Blocks , MCU_DISPLAY::BotBlocks , Block_TypeDef::com , LCD_SegmentSet() , and MCU_DISPLAY::TopBlocks .

void SegmentLCD_ARing	(	int	`anum,`
		int	`on`
	)

Light up or shut off Ring of Indicators.

Parameters

`anum`	"Segment number" on "Ring", range 0 - 7
`on`	Zero is off, non-zero is on

Definition at line 1378 of file segmentlcd.c .

References MCU_DISPLAY::ARing , ARING_TypeDef::bit , ARING_TypeDef::com , and LCD_SegmentSet() .

void SegmentLCD_Battery ( int batteryLevel )

Light up or shut off Battery Indicator.

Parameters

batteryLevel Battery Level, 0 to 4 (0 turns all off)

Definition at line 1396 of file segmentlcd.c .

References MCU_DISPLAY::Battery , BATTERY_TypeDef::bit , BATTERY_TypeDef::com , and LCD_SegmentSet() .

void SegmentLCD_EnergyMode	(	int	`em,`
		int	`on`
	)

Light up or shut off Energy Mode indicator.

Parameters

`em`	Energy Mode numer 0 to 4
`on`	Zero is off, non-zero is on

Definition at line 1423 of file segmentlcd.c .

References EM_TypeDef::bit , EM_TypeDef::com , MCU_DISPLAY::EMode , and LCD_SegmentSet() .

void SegmentLCD_Init ( bool useBoost )

Segment LCD Initialization routine for EFM32 STK display.

Parameters

useBoost Set to use voltage boost

Definition at line 465 of file segmentlcd.c .

References CMU_ClockDivSet() , CMU_ClockEnable() , CMU_ClockSelectSet() , CMU_LCDClkFDIVSet() , cmuClock_LCD , cmuClock_LCDpre , cmuClock_LFA , cmuSelect_LFRCO , LCD_Init() , LCD_IntDisable() , LCD_SyncBusyDelay() , LCD_VBoostSet() , LCD_VLCDSelect() , lcdVLCDSelVExtBoost , and SegmentLCD_AllOff() .

void SegmentLCD_LowerHex ( uint32_t num )

Write a hexadecimal number on lower alphanumeric part of Segment LCD display.

Parameters

num Hexadecimal number value to put on display, in range 0 to 0x0FFFFFFF

Definition at line 519 of file segmentlcd.c .

References SegmentLCD_Symbol() , and SegmentLCD_Write() .

void SegmentLCD_LowerNumber ( int num )

Write number on lower alphanumeric part of Segment LCD display.

Parameters

num Numeric value to put on display, in range -9999999 to +9999999

Definition at line 552 of file segmentlcd.c .

References SegmentLCD_Symbol() , and SegmentLCD_Write() .

void SegmentLCD_Number ( int value )

Write number on numeric part on Segment LCD display.

Parameters

value Numeric value to put on display, in range -999 to +9999

Definition at line 597 of file segmentlcd.c .

References NUMBER_TypeDef::bit , NUMBER_TypeDef::com , LCD_FreezeEnable() , LCD_SegmentSet() , LCD_SyncBusyDelay() , MCU_DISPLAY::Number , Segment_Numbers , and SegmentLCD_NumberOff() .

unsigned int SegmentLCD_segCnt	(	unsigned int	`segdl,`
		unsigned int	`segdh`
	)

Counting the number of active segments in a single common line.

Parameters

value in registers LCD_SEGDnL and LCD_SEGDnH (n = common line number)

Definition at line 1137 of file segmentlcd.c .

void SegmentLCD_Symbol	(	lcdSymbol	`s,`
		int	`on`
	)

Light up or shut off various symbols on Segment LCD.

Parameters

`s`	Which symbol to turn on or off
`on`	Zero is off, non-zero is on

Definition at line 678 of file segmentlcd.c .

References LCD_SegmentSet() .

Referenced by SegmentLCD_LowerHex() , and SegmentLCD_LowerNumber() .

void SegmentLCD_UnsignedHex ( uint32_t value )

Write hexadecimal number on numeric part on Segment LCD display.

Parameters

value Numeric value to put on display

Definition at line 1032 of file segmentlcd.c .

References NUMBER_TypeDef::bit , NUMBER_TypeDef::com , LCD_FreezeEnable() , LCD_SegmentSet() , LCD_SyncBusyDelay() , MCU_DISPLAY::Number , Segment_Numbers , and SegmentLCD_NumberOff() .

void SegmentLCD_Write ( const char * string )

Write text on LCD display.

Parameters

string Text string to show on display

Definition at line 1079 of file segmentlcd.c .

References CHAR_TypeDef::bit , CHAR_TypeDef::com , LCD_FreezeEnable() , LCD_SegmentSet() , LCD_SyncBusyDelay() , Segment_Alphabet , SegmentLCD_AlphaNumberOff() , and MCU_DISPLAY::Text .

Referenced by SegmentLCD_LowerHex() , and SegmentLCD_LowerNumber() .

Variable Documentation

const uint16_t Blocks[]

static

Initial value:

Defines highlighted segments for the block display.

Definition at line 345 of file segmentlcd.c .

Referenced by displayBlock() .

const uint16_t Segment_Numbers[]

static

Initial value:

Defines higlighted segments for the numeric display.

Definition at line 321 of file segmentlcd.c .

Referenced by SegmentLCD_Number() , and SegmentLCD_UnsignedHex() .

SegmentLcdKit Drivers

Detailed Description

Data Structures

Macros

Enumerations

Functions

Variables

Enumeration Type Documentation

Function Documentation

Variable Documentation