"I2C_LCD_1 _ SetContrast (50);" Function not found

[Anonymous]

Hi.All

I want to use I2C_LCD with PSoC4 CY8CKIT-049 Prototyping Kit.

In "I2C_LCD.C" or "I2C_LCD.h" of "PSoC CREATER 4.1"
"I2C_LCD_1 _ SetContrast (50);" Function not found.

I coded the following samples.

#include <device.h>
#define LCD_MODULE_ADDRESS (0x50u)

int main (void)
{
    CyGlobalIntEnable;
    I2C_Start ();
    I2C_LCD_Start ();
    I2C_LCD_SetContrast (50);
    CyDelay (1000 u);
    I2C_LCD_Position (0 u, 19 u);
    I2C_LCD_PrintString ("s");
    I2C_LCD_Position (0 u, 0 u);
    I2C_LCD_PrintString ("a");
    I2C_LCD_WriteControl (I2C_LCD_CURSOR_WINK);
   
   
    I2C_LCD_Position (1 u, 0 u);
    I2C_LCD_PrintString ("Cypress");
    I2C_LCD_PrintString ("Cypress");
    I2C_LCD_WriteControl (I2C_LCD_CURSOR_WINK);
    I2C_LCD_PrintNumber (2015);
    I2C_LCD_PrintNumber (015);
    I2C_LCD_Position (3u, 10u);
    I2C_LCD_PutChar ('$');
   
}

please tell me.

[SrikanthD_56]

Hi,

As per I2C LCD component datasheet, there is no such API called I2C_LCD_SetContrast() available for this component.

Where did you find reference to that function? It could be a user defined function to parse some custom I2C commands. Please check.

[Anonymous]

Dear srds
In case Thank you for answering.

The attached sample program is "Cypress Communtey"
It is "Main.c" of the file attached to the title "I2C LCD NEWHAVEN".
An example is also introduced in the website in Japan using 
the function (I2C_LCD_1 _ SetContrast (50);). 
Please have additional information. 
If it is unknown, try to create it yourself.

[SrikanthD_56]

So I downloaded the project from I2C LCD NEWHAVEN and observed that (as I told) it's a custom command. To use it in your project, update the I2C LCD Component Configuration parameters as shown in below image (same as I2C LCD NEWHEAVEN project) and that should resolve the build error.

[Bob_Marlowe · Accepted solution]

Probably a typo? It is "I2C_LCD _ SetContrast (50);"

Each API is prepended by the instance name of the component.

Bob

[Anonymous]

Dear Bob.

It was necessary to create custom command for LCD.
The problem was solved.
Thank you.

Ichirou.T

[Anonymous]

Dear srds.

I understood well with this answer.

The problem was solved.

Thank you.