CS43L22 on STM32F4 disco-board
Posted on March 14, 2016 at 16:08Hi, It's about CS43L22 (Low Power, Stereo DAC w/Headphone & Speaker Amps) available on STM32F4 disco-board.So according to this schematic:
Forum Posts
PWM output when CCR=0
Posted on March 14, 2016 at 16:07Hi. Ref. manual says that PWM output is '0' when CCR register is 0. I noticed a difference when I look output signal on a scope while CCR was set to 0. I have ARR set to 16383, timer frequency is 72 MHz. Thus, the pe...
using two probes
Posted on March 14, 2016 at 14:57Hello,I am working with ST-LINK/V2 and would like to use 2 probes simulteanously.The 2 probes are recognized with ST-LINK but I can't connect them simultaneously.I have tried to lauch 2 ST-LINk or to connect them wit...
LSE Intermittent
Posted on March 10, 2016 at 21:04Hello,I'm experiencing an issue with a STM32F101 using an 32.768kHz LSE.The LSE being used is the 7pf variant shown in the link below with 9pf caps as CL1 & CL2http://www.ecsxtal.com/store/pdf/ecx-71.pdfThe problem i...
output compare with 32 bit timer
Posted on March 14, 2016 at 11:19Hello there, I have a question regarding output compare mode with 32 bit timers in STM32F4 mcu. I have only one 32 bit timer that is free to use. I need to generate interrupts for 2 events. Those events should occur...
STM32F SPI DMA transfer, triggered by Timer
Posted on March 14, 2016 at 10:54Hi everyone, I have some cpu-load issue on my design, so I am trying to redesign an high frequency Rx spi transfer. (24bit) I would like to setup a timer that at a certain frequency triggers the Rx SPI transfer. Righ...
stm32f407 and 3g/gprs module ?
Posted on March 14, 2016 at 11:12Dear All,I am using an stm32F4discovery ( stm324f07vgt) to capture images coming from a camera OV5642, i would like to send pictures ( 5MP) with 3G module, Could you please suggest me an exemple of module that suppo...
STM32F37x DMA SDADC + DAC same DMA Channel
Posted on March 11, 2016 at 17:03Dear Community, I am trying to use two peripherals (STM23F373) SDADC1 and DAC1_1 having the same DMA access channel: DMA2_Channel3 (STM32F37x reference page 164). Due to a synch problem I want to use the DMA in norma...
Problem reading SD card
Posted on March 11, 2016 at 20:08Hi to all, I have a big issue with SD cards. I initialize correctly my sd card, but when I try to read a block, I can read it only the first time. This is my routine: ===================== uint32_t MYSD::ReadSector(u...
STM32F4 synchronise timer + generate variable frequency
Posted on March 07, 2016 at 12:56Hi, I have a litte problem. I need to generate a variable frequency (not duty cycle) for a piezo buzzer. Unfortunately the PCB layout is givn as a H-bridge (see image). ''Piezo'' is connected to TIM4_CH1 and ''Piezo2...
