Messages

1

preenfm2 and preenfm3 / Re: Help request for troubleshouting Preen fm

« on: January 29, 2015, 11:19:51 AM »

Hi there, it,s me again

 jumper 3 has no shortcut (i checked it with the multimeter)
I installed the bootloader again ,and device manager is recognize  the m.c saying everything is working properly
 so it,s probably not the m.c
then i remove  jumper 3  and power it again
but still no sign of life
it,s making me a bit crazy ,don,t knowing  how to figure it out
I don,t want to sound more stupid than i feel ,but i was thinking
What if i measure the voltages at the pins of the m.c ??
can you do something with that ? check if something is wrong   

2

preenfm2 and preenfm3 / Re: Help request for troubleshouting Preen fm

« on: January 25, 2015, 09:57:36 PM »

i think my controller isn,t working as is shout be
because i can flash it but nothing on my display no error message ,nothing
the only idea i have is trying another m.c. ,but thats a bit expensive
the only one i could find with the fez cer40 is mouser 25 euro +25 euro shipping
but i found this one for 12 euro

http://www.bitsandparts.eu/showarticles_info/0001STM32F103C8T6_BOARD/1-2/STM32_ARM_development_board_STM32F103C8T6_.html
can you tell me if this one fits in the Preenfm

3

preenfm2 and preenfm3 / Re: Help request for troubleshouting Preen fm

« on: January 25, 2015, 07:38:44 PM »

good evening  Xavier ,
still nothing and no jumper problems
i did some reading this afternoon on ghielectrics.com ,and if i read it right
the only thing the m.c normally needs to start is the 3.3 v  v.r 
isn,t it ??

4

preenfm2 and preenfm3 / Re: Help request for troubleshouting Preen fm

« on: January 24, 2015, 10:16:09 PM »

i checked the bootloader   and reinstalled it  using Zadig
but my dislplay stays black ,not even a blink of a led 
 my multimeter says that there is no shortcut to the ground from the 2,5v v points

5

preenfm2 and preenfm3 / Re: Help request for troubleshouting Preen fm

« on: January 23, 2015, 05:03:49 PM »

another picture of my build

6

preenfm2 and preenfm3 / Re: Help request for troubleshouting Preen fm

« on: January 23, 2015, 05:02:43 PM »

I found the picture ,and measured the points
and it seems that i don,t have 2,5v on pin 16 of both i,c,s
and i can,t measure anything on the resistor 2,5v points
any ideas???

7

preenfm2 and preenfm3 / Help request for troubleshouting Preen fm

« on: January 19, 2015, 10:47:46 PM »

Last weekend i tried build my Preen fm ,and now  i have some problems with my build
and like to have some help with  troubleshouting it
my problem is that my display stays black so i don,t know were to start
I installed the windows driver so the  microcontroller is working
but that,s all i can tell about it
I hope someone can help me with my problem