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Forum Posts

STM32F0 (72) SPI 1 Wire Bidirectional with DMA BUG?

Posted on September 22, 2014 at 08:06Aim: Read 4 byte from MAX31855 (SPI readonly compatible) using SPI2  1wire bidirectional (using DMA) Code: (attached) Note:  SPI_CR1_BIDIMODE bit set  SO->MOSI  DMA   Channel4->RX   Channel5->TX (though garbage ...

Pointer Optimization

Posted on October 09, 2014 at 15:45Hi everyone, I'm working on an STM32F427 on a program with a huge linked list. I want to decrease the size of pointers used in this list in order to increase the number of elements in my ram. For instance, the memo...

benoit2 by Associate II
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  • 1 replies
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STM32F051R8 TMER3 ISSUE

Posted on September 22, 2014 at 16:48Hi.. In STM32F051R8 board, Iam using TIM3. I need to set timer interrupt for every every 10 seconds. Iam unable calculate the prescaler, CCR and time period values. Can any one explain me please...

stm32f4 discovery board is not working

Posted on October 09, 2014 at 08:47Hi everyoneI was working with stm32f4discovery board.It was working fine and i was able to execute my programs without any difficulties.Now after some day I am working with the same board.But my stm board is not ev...

How can I exit from standby mode using wakeup pin ?

Posted on October 08, 2014 at 17:48 Hi, I'm using an stm32f401 mcu, mounted above Discovery platform, trying to understand how can I correctly use the standby low power mode; for this reason, I use the PA0 wake up to exit from this low power...

DUrbano by Associate III
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  • 8 replies
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FFT on STM32F4

Posted on October 08, 2014 at 03:24Hi,Iam trying to use DSP lib on STM32F4 chip. I run the example project of FFT on CMSIS lib and it's ok:an float array ==> FFT ==> result   it's ok.But I try on my board:Signal generator => external ADC => FFT on S...

nhandt3 by Associate II
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  • 3 replies
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STM32F2xx SPI slave receive data problem

Posted on September 12, 2014 at 04:32I have a STM32F2xx connected to FTDI UM232H using SPI communication, STM will configured as Slave and FTDI as Master, I will be using NVIDI have configured my SPI as below: 2 line duplex1 Mhz clockMSB8bitPhase ...

ho by Associate II
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  • 1 replies
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SPI TX trouble on F4

Posted on August 14, 2014 at 19:39 I have an SPI setup using DMA transfers that works for a while, and then reaches a point where the data that is passed to the DMA transfer is not what is sent over the SPI lines. Typically, I am able to success...

jwoolston by Associate II
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  • 3 replies
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Problem using RS485 on STM32F030R8T6

Posted on October 02, 2014 at 17:27 Hello, I am trying to initiate a RS485 communication with the STM32F0308DISCOVERY kit. My code is based on the ''UART_TwoBoards_ComIT'' example that I found in the STM32Cube repository (\STM32Cube\Repo...