''Error : Cannot communicate with the board'' after some use of it

[mob]

Posted on January 05, 2012 at 15:54

Hello,

    The SM8S-Discovery are crashing after some time of use. The ''ST Visual Develop'' give the error ''Error : Cannot communicate with the board''. After the first time that the error happens, the board become unusable ! I am using the STM8S-Discovery for programming purposes only. I have removed the jumpers SB1 and SB2 as required.

    The test board (that I want to write the firmware) are powered by 5V. I saw that the uC U2 of STM8S-Discovery are powered by 3V3. So my doubt is if I need to set the JP1 jumper in position 1 or 3 ?

    I am using connector CN7 pins 2 (SWIM), 4 (RESET) and 3 (GND) only for the interface with the test board.

    In some of the crashed boards, U2 became too hot !

    Any help is welcome, as I have five STM8S-Discovery unusable here !

Thanks,

Moises Beck

#stm8s-discovery-crash