Posted on June 08, 2014 at 15:49
I want to pilot LED on a ws2812: here is the datasheet
http://www.adafruit.com/datasheets/WS28pdf
Like you can see you need 24 bits for pilot one LED (change the color) ..My LEDs are only white ever...
Posted on May 30, 2014 at 11:31
Hi,
I have a big problem,I try to use a WS2812 (LED card), with a stm32f4
But it doesn t work at all ....
I try in debug and the program is blocked here:while(!DMA_GetFlagStatus(DMA1_Stream5, DMA_FLAG_TCIF5));
plea...
Posted on June 05, 2014 at 16:51So !!!! the problem is Delay(50000L) ... I need this delay because like u can see here (last page)http://www.adafruit.com/datasheets/WS2812.pdfI need 50us between the trame (24 bits) ... but I have a hardFault Error w...
Posted on June 05, 2014 at 16:20Because I analyzed the program in debugWhen i had disable i had nothing on the scope and when I put enable I had a signal after TIM_Cmd (TIM3, ENABLE);
Posted on June 05, 2014 at 14:02 The original post was too long to process during our migration. Please click on the provided URL to read the original post. https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=06...
Posted on June 05, 2014 at 13:55So i tried ... It's better ... the program pass the while.but I have a big problem, I have nothing on GPIOC7 ... I watched with a scope and I don't have signal..The goal is to drive LEDs ... on a WS2812 card ... Pleas...
Posted on June 03, 2014 at 14:09Ok, no problem, I will try theses changes: RCC_APB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);should be RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);Also note TIM3 is 16-bit DMA_InitStructure1.DMA_Pe...
