build STM32 evaluation board for less than $20

[ivan239955_stm1_st]

Posted on February 04, 2008 at 12:35

build STM32 evaluation board for less than $20

[obtronix]

Posted on May 17, 2011 at 12:21

''I see that board is creating some interest This is an early prototype

where STM32 is driving 128 Segment (Quadruplex drive) Glass through GPIOs and can also drive bigger LCDs with more segments and operating only from a CR2025 Coin cell Battery for a long period : more than 2 years

STOne-32''

Really, and it driving all the time for 2 years? What power modes are you using in software?

[obtronix]

Posted on May 17, 2011 at 12:21

''obtronix, have you seen this ST7 application note? ''

I was thinking maybe you can use the STM32 internal pull-up/pull-down resistors instead of external resistors to drive the LCD three voltage levels, but you can't turn both of them on at the same time (as far as I can see),.... but short two pins together and enable pull up on one and pull down on the other, that should give you VCC/2, getting GND and VCC from the two shorted pins is easy too

hmm I'm sure I not thinking of something

[ This message was edited by: obtronix on 27-01-2008 00:50 ]

[slawcus]

Posted on May 17, 2011 at 12:21

So... STM32 designers, I have a new assignment for you. STM32 with integrated 160 segment LCD controler.

[adrian3]

Posted on May 17, 2011 at 12:21

Quote:

I see that board is creating some interest :) This is an early prototype

where STM32 is driving 128 Segment (Quadruplex drive) Glass through GPIOs

STOne-32

Any more details on this, as it looks as if I may be doing something similar next.

[ivan239955_stm1_st]

Posted on May 17, 2011 at 12:21

- WIGGLER JTAG schematic is available on many websites. For example see attached picture.

- JTAG is not mandatory for STM32 flash programing. UART flash bootloader works happily without JTAG - just set proper levels at boot0,1 pins, attach UART1 to PC