I've got a MAX7456 chip and I am using this library with it. But the issue is that the character table is not the one the library needs to function like it should. The "Hello world" example is nowhere near to what it should display, because the character table is wrong.
All the instructions that talk about character set updating require a USB FTDI cable (I don't have one), I am able to program the board with USBASP programmer but that's it. I also have a few Nanos, if that helps.
How could I update the character table to what the library needs (without a FTDI cable) or how to make the sketch included to update the character set work properly?