Hello, I want to make sure that I understood this correctly, you're saying that the I2S audio saved to an SDCard (via SPI) on Lyra T is working ok?
Also, I tried creating a ramdisk of 1mb+ for testing, but I did not find a way do to so. For example, mkrd 1024 lends the error: mkrd: boardctl(BOARDIOC_MKRD) failed: 1 but mkrd -s 1024 128 or mkrd 64 work fine The max I succeeded in allocating is 128kb. Regards, Simona În vin., 20 oct. 2023 la 16:35, Alan C. Assis <acas...@gmail.com> a scris: > Hi Simon, > > Lucas just confirmed that it was working fine on Lyra T with ES8388 Audio > Codec. > > I think she is using SDCard over SPI (even slower). > > There is not SDCard interface support for ESP32 on NuttX yet (the > SDCard uses/shares I2S interface). > > The ESP32 MCU has 2 I2S interfaces, so in theory one can be used for > Audio and other for SDCard. > > The ESP32-S2 has only 1 I2S interface, so I don't know if it will work > well. > > Hopefully ESP32-S3 has 2 I2S as ESP32. > > BR, > > Alan > > On 10/20/23, Simon Filgis <si...@ingenieurbuero-filgis.de> wrote: > > Hi Simona, > > > > SD Cards have busy time times of 500ms max (per spec) for saving data > > internally. I saw SD Cards taking over a second of busy time. > > > > You can check with the Oszilloskop. I think data0 is the pin that > signalize > > busy... > > > > Per design, you need a stream buffer that can handle your audio stream up > > to 500ms... > > > > Regards, > > > > Simon > > > > -- > > Ingenieurbüro-Filgis > > USt-IdNr.: DE305343278 > > -- > > sent by mobile phone > > > > Alan C. Assis <acas...@gmail.com> schrieb am Do., 19. Okt. 2023, 23:36: > > > >> Hi Simona, > >> > >> On 10/19/23, Simona Toaca <simona.alexandra2...@gmail.com> wrote: > >> > Hello, > >> > I am trying to record audio using a MEMS microphone, but the final > >> > recording is missing parts periodically (for example, with a sample > >> > rate > >> of > >> > 8kHz, there are parts ~1s long missing once every ~10-11s. Using a > >> > sample > >> > rate of 48kHz, the period is ~1s long). This is my first time working > >> with > >> > I2S and I can't figure out what causes this behaviour. > >> > > >> > My setup is as follows: > >> > - the microphone has 24-bit depth in a 32-bit word (MSB first) when > >> > transmitting data > >> > - i am using nxrecorder to record the pcm audio onto an SD card > (device > >> > pcm_in0) > >> > - to listen to the recording i import the file into Audacity (24-bit, > >> > Big > >> > Endian) > >> > > >> > Defconfig regarding audio: > >> > CONFIG_AUDIO=y > >> > CONFIG_AUDIO_BUFFER_NUMBYTES=6144 (from the i2s buffer which is 8192 > >> bytes, > >> > 3/4 of it is "useful" info, 6144 bytes in total) > >> > CONFIG_AUDIO_DMA=y > >> > CONFIG_AUDIO_FORMAT_RAW=y > >> > CONFIG_AUDIO_I2S=y > >> > CONFIG_DMA=y > >> > CONFIG_DMA_LINK=y > >> > CONFIG_DRIVERS_AUDIO=y > >> > CONFIG_ESP32_I2S0=y > >> > CONFIG_ESP32_I2S0_BCLKPIN=25 > >> > CONFIG_ESP32_I2S0_DATA_BIT_WIDTH_24BIT=y > >> > CONFIG_ESP32_I2S0_DINPIN=26 > >> > CONFIG_ESP32_I2S0_SAMPLE_RATE=8000 > >> > CONFIG_ESP32_I2S0_WSPIN=27 > >> > CONFIG_ESP32_I2S=y > >> > CONFIG_I2S_DMADESC_NUM=4 > >> > > >> > I tried modifying the number of audio buffers and also making them > >> bigger, > >> > but that did not solve the problem. > >> > Any ideas on what could cause this? > >> > > >> > >> Could it be something related to SDCard storage? Maybe it needs some > >> optimization! > >> > >> Please try using a RAMDISK of 1MB+ and save the file to it. > >> > >> If it works we will know the SDCard could be the limitation of this > >> configuration. > >> > >> BR, > >> > >> Alan > >> > > >
