Hi all: I am still puzzled by my question from last November. Any knowledgeable soul out there know the answer?

AP

Hi, I understand the need for more than 1 DMA buffer to ensure continuous reading of I2S data. I assume for two DMA buffers, the CPU processes one buffer while DMA fills the second and then repeats the process by flipping the buffers. The documentation states that recv_buffer_size > dma_buf_count * ...

Hi all, for one of my projects I have two different partition.csv files depending on a Kconfig compile-time configuration. ESP-IDF lets me select one custom partition.csv file, but I would like to make that dependent on an application-specific setting. I realize this is more of a CMake question than...

I also ran into the same issue: I'm using full-duplex to talk to a SD card and half-duplex to another SPI device. The patch that is mention in this thread unfortunately does not work for me.

AP

So, after some more digging it appears that my problem is the same as the one described here: https://www.esp32.com/viewtopic.php?t=13719 What I wasn't explicit about in my original post: everything worked fine when I used full-duplex connections to both SPI devices. Things started to break once I s...

Hi all. I have two SPI devices connected to an ESP32; a micro-SD card and an FGPA. Both work fine, however, because of some timing issues I can clock the SPI signal to the FPGA only at 5 MHz. I want to use the dummy bit workaround as described in the documentation, however, this let me down a rabbit...

So, this is an example of "the code is the documentation." I guess this is a question for the Espressif folks: how much up to date is the TRM and when will the documentation catch up with the current hardware/software?

AP

Hi,

I have been tracing a call to rtc_gpio_pullup_dis(GPIO_NUM_2). This leads to a call to rtcio_ll_pullup_disable where bit 27 is cleared of RTCIO_TOUCH_PAD2_REG. I checked the TRM for this register (Register 4.54) but for bit 27 it says "reserved". What am I missing here?

TIA,
AP

Thanks, that helped. I got it to work with:
AP

Hi, I have been looking at this example where the author used the ULP to make an LED blink: https://github.com/joba-1/Blink-ULP The example uses GPIO 2 (RTC GPIO 12) to connect the LED. I tried unsuccessfully to change the example to make use of GPIO 25. According to table 4.4 of the TRM GPIO 25 is ...