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My 1602 LCD is only showing white boxes in the upper row.

Hi, I am a beginner in embedded programming and I'm trying to code in C a program that will display a 'hello world' message on the lcd display. But the lcd display is only showing white boxes even without downloading any code onto the mcu. I am using the GD32VF103 mcu. Does anyone know what is wrong with it?

This is how I have connected the wires

https://preview.redd.it/1rvrx5xtccze1.jpg?width=3024&format=pjpg&auto=webp&s=c304ac8dbb72901ccdccd829a4388e58868a534b

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Create: 2025-05-07
Last Update: 2025-06-01 06:01:17

My 1602 LCD is only showing white boxes in the upper row.

Hi, I am a beginner in embedded programming and I'm trying to code in C a program that will display a 'hello world' message on the lcd display. But the lcd display is only showing white boxes even without downloading any code onto the mcu. I am using the GD32VF103 mcu. Does anyone know what is wrong with it?

This is how I have connected the wires

https://preview.redd.it/1rvrx5xtccze1.jpg?width=3024&format=pjpg&auto=webp&s=c304ac8dbb72901ccdccd829a4388e58868a534b

https://redd.it/1kguht9
@r_riscv

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