The original block diagram released in January had one
Are there plans to add any DAC functionality before release?
Is it true that the ESP32 S3 will remove the DAC?
Is it true that the ESP32 S3 will remove the DAC?
Looking at some of the datasheets that were posted in the forum it seems like the block diagram of the ESP32 S3 won't have a DAC (the og ESP32 had 2x8bit DACs).
The original block diagram released in January had one
Are there plans to add any DAC functionality before release?
The original block diagram released in January had one
Are there plans to add any DAC functionality before release?
Re: Is it true that the ESP32 S3 will remove the DAC?
I would be surprised if the ESP32-S3 removed the DAC....but I guess if thats the case, you could still do pseudo-DAC with PWM/LEDc and an RC filter...?
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ESP_krzychb
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Re: Is it true that the ESP32 S3 will remove the DAC?
Hi sere_dev and dmaxben,
The upcoming ESP32-S3 does not have DAC1 and DAC2 peripherals.
The upcoming ESP32-S3 does not have DAC1 and DAC2 peripherals.
Re: Is it true that the ESP32 S3 will remove the DAC?
@ the dac was so useful!
Oh that's sad to hearESP_krzychb wrote:ESP_krzychb
the dac was so useful!-
Vader_Mester
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Re: Is it true that the ESP32 S3 will remove the DAC?
That's a bummer. Are you going to provide something else instead of the DAC? I wanted to use it as embedded audio, or we are left with an external DAC and I2S?ESP_krzychb wrote: ↑Fri Aug 20, 2021 3:21 amHi sere_dev and dmaxben,
The upcoming ESP32-S3 does not have DAC1 and DAC2 peripherals.
Code: Select all
task_t coffeeTask()
{
while(atWork){
if(!xStreamBufferIsEmpty(mug)){
coffeeDrink(mug);
} else {
xTaskCreate(sBrew, "brew", 9000, &mug, 1, NULL);
xSemaphoreTake(sCoffeeRdy, portMAX_DELAY);
}
}
vTaskDelete(NULL);
}-
ESP_Sprite
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- Joined: Thu Nov 26, 2015 4:08 am
Re: Is it true that the ESP32 S3 will remove the DAC?
I2S will have a PDM option; this is more-or-less the same idea as PWM but better. You can effectively feed your audio into the I2S peripheral, have a RC-filter (or ideally a better one, but RC should be sufficient) on the output pins, then connect a speaker to that.
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Vader_Mester
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Re: Is it true that the ESP32 S3 will remove the DAC?
Thanks Jeroen!ESP_Sprite wrote: ↑Wed Aug 25, 2021 1:35 amI2S will have a PDM option; this is more-or-less the same idea as PWM but better. You can effectively feed your audio into the I2S peripheral, have a RC-filter (or ideally a better one, but RC should be sufficient) on the output pins, then connect a speaker to that.
It is a good idea. On vanilla ESP32, I wanted to use the ULP to feed data to the DAC, simillar to Bitluni's approach.
Now comes the question: Can the DMA handle the LCD/CAM interface and I2S simultaneously? I'm using DMA heavy stuff with LCD peripheral. According to the latest S3 TRM (From July), if I just put the LCD and I2S into 2 different DMA channels, that should do the trick?
Code: Select all
task_t coffeeTask()
{
while(atWork){
if(!xStreamBufferIsEmpty(mug)){
coffeeDrink(mug);
} else {
xTaskCreate(sBrew, "brew", 9000, &mug, 1, NULL);
xSemaphoreTake(sCoffeeRdy, portMAX_DELAY);
}
}
vTaskDelete(NULL);
}-
ESP_Sprite
- Posts: 9764
- Joined: Thu Nov 26, 2015 4:08 am
Re: Is it true that the ESP32 S3 will remove the DAC?
Yeah, should work.
Re: Is it true that the ESP32 S3 will remove the DAC?
And what if I just want to output a simple DC voltage (yes it needs to be purely DC, it cannot be an rectified oscillating voltage). That would mean using PWM and adding quite a high quality R-C-L filter which I'd rather avoid. Bummer!
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ESP_Sprite
- Posts: 9764
- Joined: Thu Nov 26, 2015 4:08 am
Re: Is it true that the ESP32 S3 will remove the DAC?
It depends. PDM can work at pretty high frequencies, so depending on what you need, you may be able to get away with a simple sallen-key lowpass filter.
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