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Home/dma

volt.tech Latest Questions

nidhi singh
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nidhi singh
Asked: September 22, 2022In: Microcontroller

RA4M1, SPI with DMA?

  • 0
RA4M1, SPI with DMA?

Hi, I search for a small example for SPI Master and DMA transfer. So that I can receive e.g. 15 bytes with DMA and get a transfer end to intrude/ message when it’s finished. Thanks in advance!

Hi,

I search for a small example for SPI Master and DMA transfer.
So that I can receive e.g. 15 bytes with DMA and get a transfer end to intrude/ message when it’s finished.

Thanks in advance!

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dmara4m1renesasRenesas Microcontrollerspi
  1. vikas Nagpal
    Added an answer on September 27, 2022 at 11:10 am

    FSP4.0 supports DTC and DMAC transfer interface in the driver Add ther_spi driver to your design Add the DMAC transfer driver to the stack

    FSP4.0 supports DTC and DMAC transfer interface in the driver

    Add ther_spi driver to your design

    Add the DMAC transfer driver to the stack

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  • 1 Answer
Answer
vsharma
  • 1
vsharma
Asked: August 22, 2022In: Wireless Connectivity

How SPI DMA in ESP32-S2-WROOM

  • 1

How we’re implemented SPI poling in ESP32- S2- WROOM module. But now I need to apply SPI DMA for Transmit and admit. is ESP32- S2- WROOM module supports SPI DMA? actually we searched in github, I find SPI DMA stack ...Read more

How we’re implemented SPI poling in ESP32- S2- WROOM module. But now I need to apply SPI DMA for Transmit and admit.
is ESP32- S2- WROOM module supports SPI DMA?
actually we searched in github, I find SPI DMA stack but in that no DMA related functions.

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dmaesp32moduletransmit
  1. Techworld
    Added an answer on August 24, 2022 at 9:39 am

    Given that you're using the ESP-IDF SPI driver and assign a DMA channel to the host driver when initializing it, you're already using DMA. The driver will use DMA for data transfers automatically.

    Given that you’re using the ESP-IDF SPI driver and assign a DMA channel to the host driver when initializing it, you’re already using DMA. The driver will use DMA for data transfers automatically.
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Techworld
  • 0
Techworld
Asked: June 21, 2022In: Microcontroller

How to control RGB-LEDs with SK6812-Chip using a S7G2 via DMA (PWM)?

  • 0

I want to drive a chain of 86 RGB LEDs with SK6812 chip using a Renesas S7G2. The control should use as few CPU resources as possible, i.e. work via DMA if possible. Is there already a solution for such a control? ...Read more

I want to drive a chain of 86 RGB LEDs with SK6812 chip using a Renesas S7G2. The control should use as few CPU resources as possible, i.e. work via DMA if possible. Is there already a solution for such a control? External SDRAM is sufficiently available.

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86RGBcpudmamcurenesasSK6812 chip
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Answer
vikas Nagpal
  • 0
vikas Nagpal
Asked: April 25, 2022In: Microcontroller

Renesas RH850, UART, DMA, 1.5Mbps, TX&RX can not work

  • 0

Renesas RH850, UART, DMA, 1.5Mbps, TX&RX are used together. The receiver will not work after receiving several frames of data. It must be re-initialized, but it will stop working soon, but TX or RX can be used alone.

Renesas RH850, UART, DMA, 1.5Mbps, TX&RX are used together. The receiver will not work after receiving several frames of data. It must be re-initialized, but it will stop working soon, but TX or RX can be used alone.

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dmarenesas rh850rh850tx&rxuart
  1. [Deleted User]
    Added an answer on April 29, 2022 at 12:43 pm

    I guess you still need to include more details in order to fix your issue. However, I suggest you submit a ticket to Renesas Technical Support regarding your issue as information regarding automotive devices is not really shared in public. Also, please use your company email when submitting ticketsRead more

    I guess you still need to include more details in order to fix your issue. However, I suggest you submit a ticket to Renesas Technical Support regarding your issue as information regarding automotive devices is not really shared in public. Also, please use your company email when submitting tickets to Renesas Technical Support.

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