Hi all.
Today our custom design board just arrive and we begin to test. Our custom board controllinng via STM32F103RBT6 product and programmed through the Stlink programmer using Stlink Utility software. We have a problem about connection using COM port with pc.
The issue is we cannot connect pc to 103rb chip using CP2102 (usb-ttl) converter module. After a few different module replacement we decided to attach oscilloscope to the RX and Tx pins of the MCU. After that we saw the usb-ttl module send 4 different byte to the 103RB , but 103RB doesnt respond any of this commands when we click to connect button on the workbench>monitor tool. This seems wrong because all parts are soldered by pcb company and we also check the track of this signal. Also we tried couple of times with different generated codes but all acted same. So i decided to ask the reason behind of this.
I will attach all code files including some oscilloscope screen shots and part of the circuit diagram. Motor parameters and current sensing parameters are not configuret yet because we havent gone so far to test the movement.
Many thanks.
