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stm32f4 screen rotation

Posted on December 03, 2015 at 10:19Hello. I use ltdc interface to communicate with 800*480 tft screen. I need to rotate the image by -90 degress. Is it possible to do it by hardware? Software do it too slow.

STM32Cube and FreeRTOS - only 1st spawned task runs

Posted on December 04, 2015 at 00:15Hi, I'm new to using both STM32Cube and the FreeRTOS it provides support for, and I am trying to follow the tutorials and the FreeRTOS manuals online to create  2 separate tasks to manage the two I2C busses on our...

dean by • Associate II
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question about the SAI clock and example in cubeL4

Posted on December 04, 2015 at 07:07for the SAI example in cubeL4, it looks like running 22050 sample rate, and the input clock is 11.294M. I measure the frame len is about 45us which is 1/22050. Now I develop an audio app runs 44100,  I have checke...

jiangpen by • Associate II
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Computation with floats

Posted on December 04, 2015 at 15:33Hi. I have to do some calculation, where I need to be precise and have to use sine function. I do that calculation only once and speed of execution here is not so critical. So I dccided to use floats (before I had...

matic by • Associate III
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Getting bus speed of timer

Posted on November 24, 2015 at 21:09I work in CubeMX. I want to trigger my timer interrupt (period elapsed) on some speed. To fill up proper prescaler and period I need to know bus speed, on which this timer is. Is there quick way to get it, without...

sincoon by • Associate III
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Question about GPIO definition

Posted on December 04, 2015 at 18:03The GPIO mode can be defined for analog mode:1) GPIO_Mode_AIN2) GPIO_Mode_ANwhat is the difference? In what cases one mode is better than the other?Thanks.

STM32F4 controller suggestion

Posted on December 03, 2015 at 23:19Hello ; I am new to the forum ; sorry for my odd quastion ; but since ST dont post the prices of thier controllers like TI , freescale  and microchip ; so I need to ask this question here ; I am switching my desig...

timer interrupt

Posted on December 02, 2015 at 14:05hii have configurd to get an interrupt nce the timer update . But it did not work, can anyone knows whats the problem.I am using stm32f429 discovery board... void timer_init() { /**** clock for the timer *****/ ...

arunl4g by • Associate II
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