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by ESP_Sprite
Mon Apr 23, 2018 1:39 am
Forum: ESP32 SDK
Topic: Using rmt_set_pin to change the pin bound to an RMT channel
Replies: 2
Views: 83

Re: Using rmt_set_pin to change the pin bound to an RMT channel

Effectively, 'configuring the RMT for a pin' configures the GPIO matrix to use the specified pin as an output for the RMT; it does not tell it to de-configure the output for the existing pin. (This allows you to output the same signal on multiple pins, as you inadvertently found out.) To de-configur...
by ESP_Sprite
Sun Apr 22, 2018 12:35 am
Forum: ESP32 HDK
Topic: ESP-WROM-32 + SPIRAM is now possible
Replies: 4
Views: 293

Re: ESP-WROM-32 + SPIRAM is now possible

FWIW, WiFive is correct (as usual). You could either give both CPUs different address spaces, or do something like bank switching using the MMU. Unfortunately, ESP-IDF doesn't support either option out-of-the-box, though.
by ESP_Sprite
Fri Apr 20, 2018 1:05 am
Forum: ESP32 SDK
Topic: wifi_config_t structrue ap and sta members are overriten
Replies: 2
Views: 94

Re: wifi_config_t structrue ap and sta members are overriten

The .sta and .ap members are in an C union: they essentially map to the same bit of memory. This is because the ESP32 essentially has two virtual interfaces: one that can act as a station, one that can act as an access point. You can't configure one interface as both things, so the members can happi...
by ESP_Sprite
Fri Apr 20, 2018 1:02 am
Forum: General Discussion
Topic: esp32 jtag debug issue
Replies: 11
Views: 2281

Re: esp32 jtag debug issue

Okay, the issue here is that from your logs, JTAG essentially stops working suddenly and completely, the hex values of 0xFFFFFFF (all ones) essentially state that the TDO pin of the ESP32 isn't moving anymore (which by itself can be caused by the TDI/TMS/TCK pin values somehow not reaching the JTAG ...
by ESP_Sprite
Fri Apr 20, 2018 12:56 am
Forum: General Discussion
Topic: Esp32 Led won't stop blinking if external power are used
Replies: 2
Views: 108

Re: Esp32 Led won't stop blinking if external power are used

What type of external power supply do you use and how is it connected? The ESP32 needs a power source that can source at least 500mA to function well.
by ESP_Sprite
Thu Apr 19, 2018 1:55 am
Forum: General Discussion
Topic: esp32 jtag debug issue
Replies: 11
Views: 2281

Re: esp32 jtag debug issue

Are you sure you aren't reconfiguring (one of) the JTAG pins as normal GPIO or peripheral pins in your application?
by ESP_Sprite
Thu Apr 19, 2018 1:52 am
Forum: General Discussion
Topic: About the GPIO of ESP32
Replies: 1
Views: 101

Re: About the GPIO of ESP32

Because the flash chip is connected to these pins.
by ESP_Sprite
Wed Apr 18, 2018 3:22 pm
Forum: ESP32 SDK
Topic: error message ledc_isr_register()
Replies: 16
Views: 1083

Re: error message ledc_isr_register()

Ah, I think I see what's happening. You also install an ISR for the fade function, which essentially hooks into the same ISR as you're trying to register yourself later. The ISR tries to hook into the same interrupt, assuming you're trying to explicitly build a shared interrupt, but as the fade serv...
by ESP_Sprite
Wed Apr 18, 2018 8:45 am
Forum: General Discussion
Topic: ADC speed?
Replies: 12
Views: 4093

Re: ADC speed?

There's no filter we put intentionally in the signal path. The bandwidth of the ADC just is more-or-less 6KHz if you want a linear frequency response.
by ESP_Sprite
Wed Apr 18, 2018 2:30 am
Forum: ESP32 SDK
Topic: error message ledc_isr_register()
Replies: 16
Views: 1083

Re: error message ledc_isr_register()

That's curious; the only time it returns that is if the interrupt allocator is out of C-callable interrupt slots. Do you install ISRs for other peripherals? Also, if you uncomment the `//define DEBUG_INT_ALLOC_DECISIONS` line in esp-idf/components/esp32/intr_alloc.c and recompile, the interrupt allo...

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