Search found 3264 matches

by ESP_Sprite
Tue Mar 31, 2020 7:58 am
Forum: ESP32 IDF
Topic: How to implement tcp_sent callback ?
Replies: 3
Views: 153

Re: How to implement tcp_sent callback ?

Your theory is wrong; send() does not take away your ownership of the data being sent and as soon as send() returns you can modify or delete the buffer.
by ESP_Sprite
Tue Mar 31, 2020 7:52 am
Forum: Hardware
Topic: ESP32 DEVKITC WROVER-IB - jtag / openocd communication problems
Replies: 3
Views: 202

Re: ESP32 DEVKITC WROVER-IB - jtag / openocd communication problems

Are you sure the offending board isn't running some firmware that repurposes GPIO12-15 for something else?
by ESP_Sprite
Tue Mar 31, 2020 7:50 am
Forum: General Discussion
Topic: I2S: requested vs real sampling rate
Replies: 6
Views: 381

Re: I2S: requested vs real sampling rate

Note that the example uses initializers ("i2s_config_t i2s_config = {" around line 62, for instance), while your code presumably just allocates a variable on the stack (which at that point will be filled with random crap) and sets a few specified members of that to defined values. If you miss out on...
by ESP_Sprite
Tue Mar 31, 2020 7:47 am
Forum: General Discussion
Topic: Fast 16-bit parallel output?
Replies: 2
Views: 163

Re: Fast 16-bit parallel output?

You need output-only into an 16-bit bus? Look into the parallel ('LCD') mode of the I2S peripheral; that can do that at 40MHz and you don't need a shift register for that.
by ESP_Sprite
Mon Mar 30, 2020 8:00 am
Forum: ESP32 ADF
Topic: lyrat 4.3 schematic
Replies: 2
Views: 329

Re: lyrat 4.3 schematic

Those pins are used for the internal flash and can't be used for SD cards.
by ESP_Sprite
Mon Mar 30, 2020 7:52 am
Forum: Hardware
Topic: Powering ESP32 from Battery with Power Supply Module
Replies: 2
Views: 179

Re: Powering ESP32 from Battery with Power Supply Module

What exactly is this 'power supply module'? In general, 9V batteries can't always deliver the power the ESP32 needs as they tend to have a fairly high internal resistance.
by ESP_Sprite
Mon Mar 30, 2020 7:50 am
Forum: Hardware
Topic: ESP32 - Brownout
Replies: 1
Views: 120

Re: ESP32 - Brownout

They happen because something in your power supply chain can't deliver enough current, causing the voltage to the ESP32 to drop below a certain set level - this triggers the brownout detector. It shouldn't be able to damage the hardware (aside from maybe overloading an under-specced LDO or something...
by ESP_Sprite
Mon Mar 30, 2020 7:44 am
Forum: General Discussion
Topic: I2S: requested vs real sampling rate
Replies: 6
Views: 381

Re: I2S: requested vs real sampling rate

Because you have configured the sample rate to be derived from the base clock, and that effectively only allows a certain granularity in frequency choices (the freq needs to be able to be generated by dividing the base clock by a certain amount). Set use_apll to true to use the audio PLL; that shoul...
by ESP_Sprite
Sat Mar 28, 2020 1:03 pm
Forum: ESP32 IDF
Topic: Linux/OpenOCD debugging with ESP-PROG - problem
Replies: 4
Views: 206

Re: Linux/OpenOCD debugging with ESP-PROG - problem

It looks like your board keeps resetting... can you see if you can flash the blink example over serial, and then see if you still have this issue?

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