Controllers

Controller specific functions. More...

Functions
void	glcd_command (uint8_t c)
	Send command byte to LCD. More...
void	glcd_data (uint8_t c)
	Send data byte to LCD. More...
void	glcd_power_down (void)
	Power down the device. More...
void	glcd_power_up (void)
	Power up the device. More...
void	glcd_set_contrast (uint8_t val)
	Set contrast. More...
void	glcd_set_x_address (uint8_t x)
	Set X address of RAM (column). More...
void	glcd_set_y_address (uint8_t y)
	Set Y address of RAM (select bank). More...
void	glcd_write (void)
	Update the display within the specified bounding box. More...

Detailed Description

Controller specific functions.

Currently only the following controllers are supported:

• PCD8544 (Nokia 5110 LCD) SPI interface
• ST7565R with SPI interface

The C and header files defining these functions are stored in the subdirectory:

devices/

Function Documentation

void glcd_command

(

uint8_t

c

)

Send command byte to LCD.

Parameters

c	Command byte to be written to LCD

void glcd_data

(

uint8_t

c

)

Send data byte to LCD.

Parameters

c	Data byte to be written to LCD

void glcd_power_down

(

void

)

Power down the device.

void glcd_power_up

(

void

)

Power up the device.

void glcd_set_contrast

(

uint8_t

val

)

Set contrast.

Parameters

val	Value from 0 to 127. This should be experimentally determined. Supported by PCD8544 only.

void glcd_set_x_address

(

uint8_t

x

)

Set X address of RAM (column).

Device must be under basic instruction set mode before using this.

Parameters

x	X address of RAM (0 <= X <= GLCD_LCD_WIDTH-1)

See Also

GLCD_LCD_WIDTH

void glcd_set_y_address

(

uint8_t

y

)

Set Y address of RAM (select bank).

• for PCD8544, device must be under basic instruction set mode before using this.

  Parameters

  y	page address of RAM (0 <= Y < GLCD_LCD_HEIGHT/8)

  See Also

  GLCD_LCD_HEIGHT

  GLCD_NUMBER_OF_BANKS

  Note

  Update: y is actually bank number, not pixel number!

void glcd_write

(

void

)

Update the display within the specified bounding box.

This physically writes data to the device's RAM.

Referenced by glcd_clear(), glcd_draw_bitmap(), glcd_scrolling_bar_graph(), glcd_test_bitmap_128x64(), glcd_test_circles(), glcd_test_counter_and_graph(), glcd_test_hello_world(), glcd_test_rectangles(), glcd_test_scrolling_graph(), glcd_test_text_up_down(), glcd_tiny_draw_string_ammend(), and glcd_tiny_draw_string_ammend_P().