Difference between revisions of "Unit IPSTFT19"

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''To be documented''
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'''IPSTFT19 specific variables'''
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{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
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|-
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| <code>IPSTFT19_SPI_DEVICE:String = 'SPI0';</code>
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{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
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| <code>IPSTFT19_LCD_CHIPSELECT:Word = SPI_CS_0;</code>
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{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
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| <code>IPSTFT19_BL_PWM_ENABLE:LongBool = True;</code>
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|}
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<br />
  
 
=== Function declarations ===
 
=== Function declarations ===
 
----
 
----
  
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''To be documented''
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'''Initialization functions'''
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">procedure IPSTFT19Init;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Initialize the IPSTFT19 unit and parameters</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Note
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| Called only during system startup
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function IPSTFT19Start(Rotation:LongWord; const Device:String; DisplaySelect:word):THandle;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Start the IPSTFT19 driver and Framebuffer device associated with the display</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Rotation
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| The rotation of the display (eg FRAMEBUFFER_ROTATION_180)
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|-
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! Device
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| The SPI device that the ST7789 device is connected to
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|-
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! DisplaySelect
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| The SPI chip select of the ST7789 LCD controller
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|-
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! Return
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| The handle of the IPSTFT19 on success or INVALID_HANDLE_VALUE on failure
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|-
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! Note
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| This function will be called during startup if the parameter IPSTFT19_AUTOSTART is True. Can be called multiple times to support more than one IPSTFT LCD display.
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|-
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|}
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</div></div>
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<br />
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<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;">
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<pre style="border: 0; padding-bottom:0px;">function IPSTFT19Stop(Handle:THandle):Boolean;</pre>
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<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Stop the IPSTFT19 driver and Framebuffer device associated with the display</div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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! Handle
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| The handle of the IPSTFT19 or INVALID_HANDLE_VALUE for the default display
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|-
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! Return
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| True if completed or False on failure
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|-
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|}
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</div></div>
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<br />
  
  
 
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Return to [[Unit_Reference|Unit Reference]]

Revision as of 05:15, 14 November 2023

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Description

Adafruit 1.9" 320x170 Color IPS TFT Display LCD Driver unit

Adafruit 1.9" 320x170 Color IPS TFT display has 320x170 16-bit full-color pixels and is an IPS display, so the color looks great up to 80 degrees off-axis in any direction.

The TFT driver (Sitronix ST7789) is very similar to the popular ST7735.

Details:

ST7789

Width: 170 Height: 320

SPI Mode: 0 SPI Frequency: 42000000 SPI Chip Select: SPI_CS_0

DC GPIO: GPIO_PIN_25 (Pull: GPIO_PULL_NONE) RST GPIO: GPIO_PIN_27 (Pull: GPIO_PULL_NONE)

Backlight GPIO: GPIO_PIN_18 (GPIO / PWM)

Constants


IPSTFT19 specific constants IPSTFT19_*
IPSTFT19_FRAMEBUFFER_DESCRIPTION = 'Adafruit 1.9" IPS TFT'; Description of IPSTFT19 device
 
IPSTFT19_SIGNATURE = $AF000019;  
 
IPSTFT19_SCREEN_WIDTH = 170;  
IPSTFT19_SCREEN_HEIGHT = 320;  
IPSTFT19_COLSTART = 35;  
IPSTFT19_DEFAULT_ROTATION = FRAMEBUFFER_ROTATION_90;  


IPSTFT19 GPIO IPSTFT19_LCD_*
IPSTFT19_LCD_DC = GPIO_PIN_25;  
IPSTFT19_LCD_RST = GPIO_PIN_27;  
IPSTFT19_LCD_BL = GPIO_PIN_18;  


Type definitions


IPSTFT19 specific types

PIPSTFT19LCD = ^TIPSTFT19LCD;

TIPSTFT19LCD = record

Signature:LongWord; Signature for entry validation
Rotation:LongWord; Framebuffer rotation (eg FRAMEBUFFER_ROTATION_180)
SPI:PSPIDevice; SPI device for this display
GPIO:PGPIODevice; GPIO device for this display
Framebuffer:PFramebufferDevice; Framebuffer (ST7789) device for this display


Public variables


IPSTFT19 specific variables

IPSTFT19_SPI_DEVICE:String = 'SPI0';
IPSTFT19_LCD_CHIPSELECT:Word = SPI_CS_0;
IPSTFT19_BL_PWM_ENABLE:LongBool = True;


Function declarations


Initialization functions 

procedure IPSTFT19Init;
Description: Initialize the IPSTFT19 unit and parameters
Note Called only during system startup 


function IPSTFT19Start(Rotation:LongWord; const Device:String; DisplaySelect:word):THandle;
Description: Start the IPSTFT19 driver and Framebuffer device associated with the display
Rotation The rotation of the display (eg FRAMEBUFFER_ROTATION_180)
Device The SPI device that the ST7789 device is connected to
DisplaySelect The SPI chip select of the ST7789 LCD controller
Return The handle of the IPSTFT19 on success or INVALID_HANDLE_VALUE on failure
Note This function will be called during startup if the parameter IPSTFT19_AUTOSTART is True. Can be called multiple times to support more than one IPSTFT LCD display. 


function IPSTFT19Stop(Handle:THandle):Boolean;
Description: Stop the IPSTFT19 driver and Framebuffer device associated with the display
Handle The handle of the IPSTFT19 or INVALID_HANDLE_VALUE for the default display
Return True if completed or False on failure



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