ls027b7dh01_set_rotation :: Quanser C Functions

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ls027b7dh01_set_rotation

Determines whether to rotate the Sharp LS027B7DH01 LCD display 180 degrees.

Description

The ls027b7dh01_set_rotation function determines whether to rotate the display 180 degrees.

Prototype

t_error
ls027b7dh01_set_rotation(t_ls027b7dh01 display, t_boolean rotate);

Parameters

t_ls027b7dh01 display

A handle to the display returned by the ls027b7dh01_open function.

t_boolean rotate

Set to true to rotate the display 180 degrees. If this argument is false then the display is not rotated.

Return value

The return value is zero if the operation is successful. Otherwise a negative error code is returned. Error codes are defined in quanser_errors.h. A suitable error message may be retrieved using msg_get_error_message.

Error codes

QERR_INVALID_ARGUMENT

One of the arguments is invalid.

Requirements

Include Files	Libraries
quanser_lcd_display.h	quanser_devices.lib;quanser_communications.lib;quanser_runtime.lib;quanser_common.lib

Examples

t_ls027b7dh01 display;
t_error result = 
    ls027b7dh01_open("spi-cpu://localhost:1?word='8',baud='45000000',polarity='on',phase='on',memsize='8192',frame='0'", LCD_ACCESS_EXCLUSIVE, &display);
if (result == 0) {
    const char message[] = "Hello world!";
    ls027b7dh01_set_rotate(display, true); /* Rotate display */
    ls027b7dh01_print(display, 0, 0, message, ARRAY_LENGTH(message));
    ...
    ls027b7dh01_close(display);
} else {
    TCHAR message[512];
    msg_get_error_message(NULL, result, message, sizeof(message));
    _tprintf(_T("Failed to open LCD display. %s (error %d)\n"), message, -result);
}