EwGetGlyphMetrics function triggers EwPrint function which causes the target to reset

Question

Hi,

Incident :

1. While trying to show a junk character loaded from target ex(0x8D, 0x55, 0x57, 0xE6, 0xA2, 0xDD, 0x35, 0x0, 0x0, 0x0, 0x0) corresponding characters (, U, W, æ, ¢, Ý, 5, , , ,), EwGetGlyphMetrics function triggers EwPrint function which causes the target to reset

Root cause for triggering the EwPrint function is not known and what exactly is happening while trying to show this text by using Roboto Condensed font of range 0x0001-0xFFFF is not exactly known

Kindly provide necessary support to figure out this issue and Corrective action to take to resolve the reset action from target

Answer 1

Hello,

EwPrint should not reset your target - it should print some message over the serial interface to a connected terminal window (e.g. Tera Term or Putty). EwPrint is used to report runtime error messages from your target.

The error message contains the root cause. Let us know the error message then we can go ahead.

Best regards,

Manfred.

Comments

Hi Manfred,

Error code : 180

What might be the issue it's causing

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Hi,

this is the error message. Check the character that you want to print and if the font contains the corresponding glyph.

Best regards,

Manfred.

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Hi Manfred,

What will happen if the font does not contains the corresponding glyph, whether it'll try to load a null value in runtime

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It will not "try to load a null value in runtime" - it will report an error message and use the default character instead.

Maybe the section Specify the Text is helpful.