Hello, I have a Usb-Rs232 cable with prolific serial chip inside I connected to A13 UART1 pins and trying to debug when android starts. When using Putty on PC the only thing showing is garbage like symbols. Baudrate should be 115200 right? 8 data bits 1 stop bit no flow and no parity. What am I doing wrong or is it a problem with cable? (Konig is the company which made it no clone)
Are you connecting all four pins, or just TX/RX/GND?
only TX/RX/GND
Quote from: paul007 on December 17, 2012, 01:06:05 AM
only TX/RX/GND
That's as it should be - I don't suppose you have another cable you could test, just to make sure it's not the issue?
Are you using any kind of RS232 to TTL converter in between?Like MAX232?
No converter in between I simply connect tx, rx, gnd to uart pins
You need to convert RS232 to TTL in order to connect via UART any kind of microcontroller/ASIC to your pc! Check this out: http://www.sparkfun.com/tutorials/215 (http://www.sparkfun.com/tutorials/215)