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Forum Posts

Efficient way to implement trigonometry functions?

Posted on February 02, 2013 at 19:28Hello,I'm working on the STM32F4, and in my application i need to use atan2 and exp a very large number of times.In my initial implementation i used the stlib for atan2 and exp. Unfortunately, in the current state...

Using ST Link on Discovery board as standalone ST Link

Posted on February 02, 2013 at 09:12I have http://www.sainsmart.com/sainsmart-stm32f103rbt6-arm-cortex-m3-mini-development-board-code-jlink-v8-adapter.html (board only), and I need a JTAG debugger to program it.  Is it possible to use my F1 discover...

Sampling multiple A/D inputs-Quick Question

Posted on February 02, 2013 at 09:18Quick background: I'm using the STM32VL which has 1 ADC peripheral with a possible 18 channels inputs that are multiplexed to the actual ADC. I believe I have the configuration set up correctly for 2 analog inputs...

rj by Associate II
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SPI 9bit Frame

Posted on January 23, 2013 at 20:08Dear Friends; I use SPI protocol @ stm32f100c4 to interface with GLCD , to interface GLCD frame must be  SPI 9bit. From Datasheet: Stm32f100C4 has two mode 8bit frame or 16 bit frame for sending data by SPI protcol...

Bootloader to Application Transition Not Fully working.

Posted on January 31, 2013 at 19:47I have an application I build from Atollic True Studio that runs correctly stand alone on an STM32F407ZE processor. I am working to insert a boot loader that later branches to the application.  The boot loader runs...

Resetting Non Processor Register on STM32F4

Posted on January 31, 2013 at 21:24I have an application that runs fine alone when booted stand alone but appears to have timing problems when branched to through a boot loader.  It appears to run slowing and I suspect timing related registers. Is t...

STM32F407VG AND BATTERY

Posted on January 31, 2013 at 16:34Hi everyone I hope someone could confirm this: I am designing a project with  STM32F407vg that must operate from battery  for about 2 years in STANDBY MODE, In my system i have 2 batteries , external 12v that is r...

sami by Associate II
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USART - Sending break characters on RS485 bus

Posted on January 30, 2013 at 20:58Hi all,I can't figure out whether the TC flag is set at the end of a break character or not.I use a GPIO to enable TX mode on the RS485 transceiver at the end of any transmission I normally monitor the TC flag and ...