I have recently been given a batch of (hopefully useful) really nice PCBs and displays.
The display is a 6x20 backlit LCD (Batron BT62005P) and it is driven by an AT89C52 controller which takes serial data from a Maxim MAX233CPP RS232 device.
There's an on board switching converter using an LM2567T device.
I have been told that the RS232 data string for the input takes the form of <STX><ADDR><DATA><ETX> where ADDR is the line to be written to on the display (0 to 5), and DATA is the 20 ASCII characters to be displayed. Any data not in this format is ignored
I have also been told that the comms are 9600 baud, 8 data, 1 start, 1 stop, no parity
I have tried generating a test string using Hyperterm on the PC but it doesn't really seem cut out for this sort of thing (or I don't know what I'm doing of course).
So does anyone know of any free (emphasis on FREE!
) software which can be configured to output this sort of data string from a PC's serial port purely for testing purposes.
The board is also configured for in-board programming of the AT89C52 so also does anyone know of any useful programmer designs or possibly an adaptation for using any of the PIC type of programmers?
Thanks
Slim Haines
The display is a 6x20 backlit LCD (Batron BT62005P) and it is driven by an AT89C52 controller which takes serial data from a Maxim MAX233CPP RS232 device.
There's an on board switching converter using an LM2567T device.
I have been told that the RS232 data string for the input takes the form of <STX><ADDR><DATA><ETX> where ADDR is the line to be written to on the display (0 to 5), and DATA is the 20 ASCII characters to be displayed. Any data not in this format is ignored
I have also been told that the comms are 9600 baud, 8 data, 1 start, 1 stop, no parity
I have tried generating a test string using Hyperterm on the PC but it doesn't really seem cut out for this sort of thing (or I don't know what I'm doing of course).
So does anyone know of any free (emphasis on FREE!
The board is also configured for in-board programming of the AT89C52 so also does anyone know of any useful programmer designs or possibly an adaptation for using any of the PIC type of programmers?
Thanks
Slim Haines