Ask questions, find answers, and share insights on STM32 products and their technical features.
Posted on May 25, 2015 at 16:45 Hi there, I try to send data from PC to my stm32 board using RS232 but each time I send data to stm I get exactly same strange other data for sample: if i send 0x12 i receive 0xc4 always and if i s...
Posted on May 24, 2015 at 16:52Hello, i have a question, since i dont have much experience working with flash... The 32F407VE is 512kbytes flash size, but when trying to read the content of the flash with ST LINK application, the flash range is on...
Posted on May 24, 2015 at 20:48I've startup a board using STM32F072 ( new with ST :) ) ,but cannot get the RTC wake up timer to work, i can see the RTC Registers are moving using LSE 32K crystal in debug mode, thus RTC->DR increase every second.i w...
Posted on May 22, 2015 at 15:33 Hello, Can anyone help in pinpointing where and what I'm doing wrong when seting up USART DMA TX transmission. Working with STM32L152RB (STM32L discovery) and trying to setup USART1_TX overDMA1_Channel4,USA...
Posted on May 25, 2015 at 13:13HelloWhat is range of the PLLN and PLLI2SN multiplication factors?According to pages 226 and 265 of RM0090_Rev9, their range is 192=< PLLN , PLLI2SN <= 432 , so factors below 192 aren't allowed?Thanks.
Posted on May 25, 2015 at 14:57 Hi, I'm working on the stm32f4discovery board, with the last version of keil µvision. I used library from stm32Cube. I have problem with CRC peripheral : I can't get a right result. My initial...
Posted on May 23, 2015 at 17:59Hi!I am working now on the project (STM32F429i board) where I need to profile the velocity of servo motor (i.e. trapezoidal velocity)... So I need to control the number of pulses I've sent via PWM channel, to control p...
Posted on May 25, 2015 at 06:17HelloSuppose configuring system clock to 168MHz.According to page 226 of RM0090_Rev9, it is recommended to set PLLM in a way to achieve 2MHz for VCO input frequency(e.g. 8MHz HSE with PLLM=4) in order to limit jitter a...
Posted on May 25, 2015 at 15:27 My STM32VL discovery board shows as having an up-to-date firmware of V1J13S0 according to the ST-LINK utility, but the USB implementation is still broken, causing a long delay and numerous kernel errors and warnin...
Posted on May 25, 2015 at 12:53Hi!I have one question: why when I update the timer PSC, ARR and CCR1 registers to change the frequency of PWM signal, the first pulse is generated with the earlier frequency and only second and next have desired frequ...
