Search found 430 matches

by Ritesh
Tue Feb 20, 2018 6:02 pm
Forum: ESP32 SDK
Topic: DMA example for UART communication for ESP32
Replies: 15
Views: 554

Re: DMA example for UART communication for ESP32

Yes tout interrupt generates UART_DATA event. Other than changing the wait timeouts not really. But you may want to ask do you need to use event queue and double buffered data or can you just do like this https://github.com/espressif/esp-idf/tree/master/examples/peripherals/uart_async_rxtxtasks Hi ...
by Ritesh
Tue Feb 20, 2018 5:57 pm
Forum: ESP32 SDK
Topic: UART over DMA, registers are missing in reference manual
Replies: 5
Views: 180

Re: UART over DMA, registers are missing in reference manual

ESP_Sprite wrote:Changed title, 'resistors' is quite the misleading term here.

I'll see if I can take this up with the docs team.


Ok.

Thanks for your prompt response.

I will be waiting for your reply on this as soon as possible.
by Ritesh
Tue Feb 20, 2018 3:25 am
Forum: ESP32 SDK
Topic: UART over DMA, registers are missing in reference manual
Replies: 5
Views: 180

Re: UART over DMA, resistors are missing in reference manual

Hi WiFive ,

Would you please check question which has been raised by Rahul Patel and let me know if you have any informations regarding those missing details into Reference Manual.\

They are referring latest ESP32 Reference Manual Document for same.
by Ritesh
Tue Feb 20, 2018 3:22 am
Forum: ESP32 SDK
Topic: DMA example for UART communication for ESP32
Replies: 15
Views: 554

Re: DMA example for UART communication for ESP32

If you are using uart_read_bytes with nonzero wait time the task should unblock when tout interrupt pushes bytes to ringbuffer Hi, Thanks for Reply. I am just little bit confuse here regarding tout interrupt. would you please let me know tout interrupt is same as UART Receive Byte Interrupt or it i...
by Ritesh
Mon Feb 19, 2018 6:01 pm
Forum: ESP32 SDK
Topic: DMA example for UART communication for ESP32
Replies: 15
Views: 554

Re: DMA example for UART communication for ESP32

If the baud is 115200 then the tout interrupt will come approx 90us after end of frame. Hi, Would you please provide any sample example to receive and handle received data with dynamic size and dynamic interval coming from UART module without DMA? Because we had tried without DMA just to read data ...
by Ritesh
Mon Feb 19, 2018 4:33 pm
Forum: ESP32 SDK
Topic: UART over DMA, registers are missing in reference manual
Replies: 5
Views: 180

Re: UART over DMA, resistors are missing in reference manual

Hi Loboris or Espressif Developer,

I am working with Rahul who has raised query regarding UART DMA registers.

So, Would you please check it from your side and let us know if you find anything?
by Ritesh
Sat Feb 17, 2018 9:44 am
Forum: ESP32 SDK
Topic: DMA example for UART communication for ESP32
Replies: 15
Views: 554

Re: DMA example for UART communication for ESP32

End of frame will also generate tout interrupt so unless you need ultra realtime processing of messages it should be ok. Let's consider our UART module is going to send packets with variable size in every 100 msec of interval over Interrupt and also it needs some little bit time to process that pac...
by Ritesh
Sat Feb 17, 2018 4:46 am
Forum: ESP32 SDK
Topic: DMA example for UART communication for ESP32
Replies: 15
Views: 554

Re: DMA example for UART communication for ESP32

We didn't set fifo threshold to 1 byte but set 1 byte as interrupt to get each byte interrupt. Isn't that the same thing? uint8_t rxfifo_full_thresh UART RX full interrupt threshold. Why do you need an interrupt for each byte? Default is 120. We don't have fixed size of frame coming from UART modul...
by Ritesh
Fri Feb 16, 2018 7:28 pm
Forum: General Discussion
Topic: Use of dual core
Replies: 32
Views: 12468

Re: Use of dual core

Good Morning, i want to implement a slow speed pcm slave interface capable of transfering 32bit frames with 8kHz In- and Output at the same time. When i got my ESP32 i tried to (ab)use the I2S interfaces for that. I made more ivestigations Friday. There is my open thread you can find under: http://...
by Ritesh
Fri Feb 16, 2018 6:54 pm
Forum: ESP32 SDK
Topic: DMA example for UART communication for ESP32
Replies: 15
Views: 554

Re: DMA example for UART communication for ESP32

The problem is setting fifo threshold to 1 byte We didn't set fifo threshold to 1 byte but set 1 byte as interrupt to get each byte interrupt. So, will it create any problem while receiving data from both UART at every 100 msec? Let me know if you had any idea regarding DMA UART example or any info...

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