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Posted on June 06, 2014 at 00:52Hey ST Forum,I'm using the ST32F4-Discovery Board, and ran into some problems while testing UART4_TX in DMA Mode. When I look at oscilloscope, the TX line is pulled down, then gradually goes back to 3V. I think my Per...
Posted on July 11, 2011 at 15:01I'm an absolutly beginner in microcontrollers. I want to create a simple square wave signal on STM32F103VB with tim3, ch2, but nothing happens. Can anybody tell me what I'm doing wrong? Thanks Tom #define DEF_SPEED ...
Posted on June 05, 2014 at 11:36Hi all,Following the instructions in the AN3968,I uploaded the project contained in firmware demo stsw-stm32069 (STM32F4x7 in-application programming (IAP) over Ethernet based on lwIP TCP / IP stack (AN3968))on my STM...
Posted on June 03, 2014 at 17:04Hi All, I am using STM32 F0 Discovery board with Raisonance IDE, I am with LED blink using TIM. I want to blink for every 1s but I dont know how to set the timer, Please tell me how the calculation is done for 1s and ...
Posted on June 05, 2014 at 17:15Single precision float on units that have an FPU is apparently one cycle.How much of an overhead are doubles?
Posted on February 28, 2014 at 16:28Is there any documentation or examples for the new USB stack in the STM32CubeF4 code library ? I need to implement an USB Virtual Com port. I have done this for the older usb stack in the STM32F4-Discovery_FW_V1.1...
Posted on June 05, 2014 at 14:46Hello, I am very new in STM32F103 CPU and I need to make very simple program. I need to generate PWM signal with definned on-time and off-time.The on-time must be in range from 1us to 1000us, step is 1 us. The same wi...
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 04:21Hi All,Using any type of SD card (SD,SDHC,SDXC) DMA reading from the cards works consistently (With an XC card, can obtain 12-15 MB/s)Writes are typically 2-6 MB's, but every so often, the DMA-write stalls for up to 2...
Posted on June 04, 2014 at 22:15Hi,I want to declare an array of constant values and have them put into code memory.Something like this:const uint16_t my_array[4] = {0x3456, 0x789A, 0x1234, 0x9876};I want to be able to download the code and then sta...
