Ask questions, find answers, and share insights on STM32 products and their technical features.
Posted on May 11, 2013 at 16:20 I noticed the CPAL uses spin type waits including at least one in an interrupt (see code below). Thes e are u sed via the MACRO __CPAL_I2C_TIMEOUT. I have some concern with the one in the interrupt handl ...
Posted on April 17, 2013 at 12:12Section 2.6.8 of RM0038 states:''fPCLK1 must be a multiple of 10MHz to reach the 400kHz maximum I2C fast clock mode''how can I calculate the maximum I2C frequency I can achieve using a 4.2MHz fPCLK1this information d...
Posted on May 14, 2013 at 04:41Ti has dropped its M3 Stellaris line. Their new M4 does not have I2S or extended memory controllers. It takes time to know a product line, which parts are up and coming, which ones to avoid, and which tool set. I'm sta...
Posted on April 29, 2013 at 20:22hello forum , I am using openOCD JTAG with Eclipse for downloading my code into STM32F4 I have a question ; how to read protect my F4 after I download my code ? thank you #eclipse-openocd-read-protect
Posted on May 10, 2013 at 09:00i have connected a potentiometer(via stm32f103 3.3 v) to stm32f103 adc channel 1 (ADC1_IN1), with continuous mode, sampling 1.5. i am getting the values in DR register, and want to change the values during run time by ...
Posted on May 15, 2013 at 05:08Hi, everyone. I am trying to control a slave device by SPI Communication. But I have a problem with SPI, SCK is not output when receiving a data. Tx is OK. Why does this problem happen? I hope you help me to slove this...
Posted on May 14, 2013 at 23:40I am trying to use GPIO Pin PE9 and PE10 as outputs to a system. From using the STM32L1Discovery Board I know that the GPIO Output voltage should be 3 V. But when I am using the F4 BOard my output on PE9 is 2 V and P...
Posted on May 14, 2013 at 17:31I have 3 STM32L152 discovery which anser ''Unknown target connected'' when I load a program from keil.I try setting BOOT0 HIGH when I push the reset Button .There no result.Best regardsYves de Brest
Posted on May 13, 2013 at 11:19Hi, I am trying to playback a file with short PCM data recorded at 8KHz, 16bits, mono. I have tryed to configure the I2S with ''I2S_Standard_PCMShort'' but I can�t hear any sound. I have made a file like the file ''aud...
Posted on May 13, 2013 at 11:10Hi guys, i've a problem with USART communication using interrupts.Using only USART device, the communication works correctly.When i try to using the usart device with some other timers interrupt routines with timers ab...
