Debug through UART1

[paul007]

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)

[jwischka]

Are you connecting all four pins, or just TX/RX/GND?

[paul007]

only TX/RX/GND

[jwischka]

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?

[lordlothar]

Are you using any kind of RS232 to TTL converter in between?Like MAX232?

[paul007]

No converter in between I simply connect tx, rx, gnd to uart pins

[lordlothar]

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