STM32U0 is the first Cortex-M0+ with a static consumption of only 160 nA in standby mode with RTC (Real-Time Clock) and 16 nA in shutdown. It also achieves 118 points in CoreMark and targets SESIP level 3 and PSA level 1 focusing on firmware code pro...
Posted on July 16, 2014 at 02:29 Hi! I have a small rtos and I have to write a string every 5 ms to a sdcard. This (pseudo)Code works fine: void SDTask(...){ // some init for( ;; ){ SDopen(&File); SDWriteString(&File,SDstr...
Posted on July 14, 2014 at 15:38Hi,I am trying to do the FFT over an input real data (audio) on STM32F4 DISCO EVK & external CODEC. I have used the CMSIS function arm_rfft_fast_f32() http://www.keil.com/pack/doc/cmsis/DSP/html/group___fast.html I ...
Posted on July 12, 2014 at 11:17USART communication with stm32f4 discovery application did. At the beginning of the data sent to the PC comes an unwanted character. Sent from the computer to one of the characters I can not even. I changed it to HSE ...
Posted on July 15, 2014 at 14:51Hi I am using STM32F429 with IAR work environment and i am trying to sync two clocks first clock: MCO2 is configured to output 29.5MHZ by using PLLI2SCLK second clock: LCD-TFT configured to output 14.75MHZ (half of M...
Posted on July 15, 2014 at 22:16Hi, With the Keil qVision v5 Logic Analyzer I'm tracing (ST-Link) an single ADC value which is updated every 10 microsecond. Directly after starting the trace I get ''Trace: SW Buffer Overrun''. Is this a ST-Link lim...
Posted on July 15, 2014 at 17:21Hi,I am currently implementing a USART rx driver on an STM32F303xxx using a receive DMA buffer. The motivation to use DMA is to allow reception of bursty high speed (8Mbps) data. [note that using HW flow control doesn...
Posted on July 15, 2014 at 17:12I'm trying to understand how this function should be used on an F405 chip. The code that calls calloc is all generated from a simulink fuzzy controller model so I'm confident it's correct in terms of code.The program ...
Posted on July 15, 2014 at 17:19Hello again. I've two usarts in use on my board. One, Usart1 is connected to the console and the other usart2 is connected to a modem chip. When I enable the usart2 interrupt using the NVIC commands, there is no outpu...
Posted on July 15, 2014 at 16:18DearI have read Ch14.1 Systicks the definition guide of Cortex M3 2nd. But I still confuse it. If I take the Systicks Reload = 65536, the corresponding time is 65536 * 168 MHz * 1e9 ?Am I correct? Thanks
Posted on July 15, 2014 at 17:26DearI have read Ch16.2 Trace component DWT, the definition guide of Cortex M3 2nd. But I still confuse it. If I take the CYCCNT, the corresponding time is CYCCNT * 168 MHz * 1e9 ?Am I correct? Thanks
