...I have connected the TX of Ft232 to Rx of Pro mini.
Quote from: ashta on Feb 04, 2011, 02:54 pm...I have connected the TX of Ft232 to Rx of Pro mini.I THINK you also have to connect the reverse path: Tx on Mini to Rx of FT232 so that some 2-way handshaking can take place..Let us know what happens!
thanks friends.did some motre research on this.1. TX on Arduino is an o/p2. Rx on Arduino is an Input.3. Tx on the Ft232 is an Input. (Atleast the one that i have)4.Rx on the Ft232 is an O/P ( Atleast on the one that i have)The above have been confirmed thru schematics as well as physical multimeter checking and also thru Oscilloscope.Hence Arduino TX will have to go to Ft232 TXandArduino RX will have to go to Ft232 RX.I had initialy connected the other way.But inspite of doing it as above, it was still not down loading.Next step: Disconnected the TX and RX from Arduio, and looped it. and under Arduino 0022- Tools - serial monitor. typed some letters and saw that these are echoed... confirming that the Ft232 is working fine.Then, checked the TX pin of the Arduino (Isolted from Ft232) and found that the level is low in idle condition. Since TXO is an out put and active low, in idle condition this has to be High In active. Tried to Pull up this line and it was getting pulled up. So it looks like that there is a problem in this pin.This is my observation as of now and looks like the Arduino 328 chip has gone bad.Pl comment on the above obnservation ashtaQuote from: Terry King on Feb 04, 2011, 08:04 pmQuote from: ashta on Feb 04, 2011, 02:54 pm...I have connected the TX of Ft232 to Rx of Pro mini.I THINK you also have to connect the reverse path: Tx on Mini to Rx of FT232 so that some 2-way handshaking can take place..Let us know what happens!
What board is the FT232 on? Did you connect DTR or RTS from the FT232 through a 0.1 uF capacitor to reset on the Pro Mini? Otherwise, you'll need to manually reset the Pro Mini right before (or right after) hitting the upload button in the Arduino software.
but i tried resetting just before down load and still it does not work.