About EGold.3

EGold.3 · 2022-10-23

Hi, I am using an STM32F429 to calculate the pulse times from an an IR receiver. The IR receiver outputs a signal that follows the NEC Protocol, which is defined here: https://techdocs.altium.com/display/FPGA/NEC+Infrared+Transmission+ProtocolThe pro...

EGold.3 · 2022-02-25

Using an STM32F429 board, I am attempting to enable DMA transfers for the UART8 TX and RX. However, while reading the data sheet, I found the following DMA channel/stream mapping: You'll note that for the UART8 TX and RX DMA request, both requests li...

EGold.3 · 2022-02-25

I am working on a project that requires UART transmission using DMA. I am attempting to do this solely through register manipulation. Currently I am only able to transmit data using DMA transfer once, but when I try and send again, the UART sends not...

EGold.3 · 2022-02-11

I am working on a portion of code that handles some UART messages that come in periodically from an LCD. The reception of a message over UART from this screen will generate a response based on the parsing of the message received.It is part of a large...

EGold.3 · 2022-01-10

Hi everyone, I'm just trying to test and verify some clock frequencies for a PWM waveform are correct. I used CubeMX to generate some code that has set the clock frequency of the MCU to 72 mHz and I am trying to achieve a 20 kHz PWM frequency. I enab...

EGold.3 · 2022-02-25

Apologies, meant to write UART8 TX and RX. What do you mean by scatter/gathering in this case for the TX DMA?

EGold.3 · 2022-02-25

I see. The UART communication is strictly half duplex, so I'm not worried about conflicts of reception during transmission or vice versaWould it possible to configure both UART8 DMA RX and TX and just disable one while using the other?

EGold.3 · 2022-02-25

Solved the issue. I disabled the dma transfer bit set in the UART5->CR3 register after I disable the DMA channel on line 4 and then re-enable on line 18 (as it is now). This allows me to execute multiple transmissions. I think it's because never disa...

EGold.3 · 2022-02-11

I see, so once I kick off the DMA transfer from UART through a call to like HAL_UART_Receive_DMA() in circular mode I never have to invoke it again?

EGold.3 · 2022-02-11

What’s the utility of using the DMA in circular mode versus normal?

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User Activity

Correct Timer Configuration for Capturing Edge Times In Order to Calculate Pulse Width

Can the STM32F4 controller allow for two DMA requests on the same peripheral? If not, how can the DMAMUX be utilized to allow such a case?

UART Transmission Using DMA Can Only Transfer Once (Not Using Interrupts)

Continously Receiving UART Data and Transferring to DMA without Generating Interrupts With Variable Length Data on the STM32L475RE

PWM Output Not Generating Waveform for STM32F429ZI

Re: Can the STM32F4 controller allow for two DMA requests on the same peripheral? If not, how can the DMAMUX be utilized to allow such a case?

Re: Can the STM32F4 controller allow for two DMA requests on the same peripheral? If not, how can the DMAMUX be utilized to allow such a case?

Re: UART Transmission Using DMA Can Only Transfer Once (Not Using Interrupts)

Re: Continously Receiving UART Data and Transferring to DMA without Generating Interrupts With Variable Length Data on the STM32L475RE

Re: Continously Receiving UART Data and Transferring to DMA without Generating Interrupts With Variable Length Data on the STM32L475RE