marmur99
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Hi,
I have got WG12864A-TFN-T#H and a problem with its initialization. I have followed **broken link removed** to connect the device to the system. I am pretty sure I have done that well and I cannot see any electrical problems. Unless I've been working on it too long to see some obvious mistake.
Anyway, the problem is that when I read back status, it has always value 0xA0, which according to spec means BUSY and LCD_OFF. Even if I ignore the status, there is nothing on the LCD. I also tried filling the space with 0xFF to see enything - no success.
I guess three options are likely here:
Any help very appreciated!
marmur99
I have got WG12864A-TFN-T#H and a problem with its initialization. I have followed **broken link removed** to connect the device to the system. I am pretty sure I have done that well and I cannot see any electrical problems. Unless I've been working on it too long to see some obvious mistake.
Anyway, the problem is that when I read back status, it has always value 0xA0, which according to spec means BUSY and LCD_OFF. Even if I ignore the status, there is nothing on the LCD. I also tried filling the space with 0xFF to see enything - no success.
- Power supply is 5V
- Vo connect through R-divider between VDD and Vout
- Reset cycle is done by CPU (low state interval is about 100us)
I guess three options are likely here:
- Broken LCD
- software issue - lack of proper initialization procedure or something
- hardware issue - this is least likely as I checked everything several times. If I want to send something to LCD, it is visible on its connector. The value 0xA0 really comes from the LCD - checked that with a multimetter.
Any help very appreciated!
marmur99