Search found 13 matches
- Sat Jul 10, 2021 10:25 am
- Forum: Hardware
- Topic: Can the ESP32 interupt and read port within 1us?
- Replies: 6
- Views: 6306
Re: Can the ESP32 interupt and read port within 1us?
I think you can use PULSE_CNT to try
- Fri Oct 23, 2020 3:10 pm
- Forum: General Discussion
- Topic: ESP32-S2 G-SPI SCLK Frequency
- Replies: 1
- Views: 2759
ESP32-S2 G-SPI SCLK Frequency
https://docs.espressif.com/projects/esp ... slave.html
In this link,SPI Slave SCLK Frequency limited 11.4MHz or 7.2MHz.
But it's 40MHz in the datasheet.
Which one is right?
In this link,SPI Slave SCLK Frequency limited 11.4MHz or 7.2MHz.
But it's 40MHz in the datasheet.
Which one is right?
- Mon Jan 20, 2020 11:42 am
- Forum: General Discussion
- Topic: ESP32 I2S camera slave mode I2Snl_Data_in Can be set to 1-bit/2-bit/4-bit?
- Replies: 2
- Views: 3660
Re: ESP32 I2S camera slave mode I2Snl_Data_in Can be set to 1-bit/2-bit/4-bit?
Not exactly... if you need 1-bit, you may be able to fake something using the normal (non-camera) I2S mode. If you need 2 or 4-bit modes, perhaps the dual-SPI/QSPI modes of the SPI peripherals can do what you need. Thanks your reply! In SPI Slave mode,the SPI-clk frequency is not higher than CLKapb...
- Sun Jan 19, 2020 3:11 am
- Forum: General Discussion
- Topic: ESP32 I2S camera slave mode I2Snl_Data_in Can be set to 1-bit/2-bit/4-bit?
- Replies: 2
- Views: 3660
ESP32 I2S camera slave mode I2Snl_Data_in Can be set to 1-bit/2-bit/4-bit?
ESP32 I2S camera slave mode I2Snl_Data_in Can be set to 1-bit/2-bit/4-bit?
From https://github.com/espressif/esp32-camera
I found camera interface I2Snl_Data_in is 8-bit data width.
Can I set to 1-bit/2-bit/4-bit? And How to store into DMA buffer ?
From https://github.com/espressif/esp32-camera
I found camera interface I2Snl_Data_in is 8-bit data width.
Can I set to 1-bit/2-bit/4-bit? And How to store into DMA buffer ?
- Wed Nov 07, 2018 10:17 am
- Forum: Hardware
- Topic: ESP32D0WD RTC 32.768KHz
- Replies: 1
- Views: 4348
ESP32D0WD RTC 32.768KHz
Hi,there
I use external 32.768KHz crystal as rtc clock.It's Cl is 9pf and Rl is 35Kohm.
Most of ESP32 take 2-3s to work,but some ESP32 32.768Khz don't work.
What's crystal parameters?
Thanks in advance for your help!
I use external 32.768KHz crystal as rtc clock.It's Cl is 9pf and Rl is 35Kohm.
Most of ESP32 take 2-3s to work,but some ESP32 32.768Khz don't work.
What's crystal parameters?
Thanks in advance for your help!
- Wed Nov 07, 2018 9:58 am
- Forum: Hardware
- Topic: ESP32D0WD deep sleep current
- Replies: 0
- Views: 2576
ESP32D0WD deep sleep current
hi,there I set ESP32 into deep sleep,it's current is 10uA. But it slowly increases to 50uA or more.It takes several senconds or minutes. After I replaced ESP32,it's deep current is kept at 10uA. When I replaced the old one,the current increased slowly. What‘s the reason? Thanks in advance for your h...
- Fri Aug 24, 2018 7:28 am
- Forum: Hardware
- Topic: Pad Hold ---- REG_DG_PAD_FORCE_UNHOLD
- Replies: 3
- Views: 5638
Re: Pad Hold ---- REG_DG_PAD_FORCE_UNHOLD
Solved it!
It's in RTCIO_DIG_PAD_HOLD_REG,but it's only set to hold 0.
It's in RTCIO_DIG_PAD_HOLD_REG,but it's only set to hold 0.
- Wed Aug 22, 2018 4:55 am
- Forum: Hardware
- Topic: Pad Hold ---- REG_DG_PAD_FORCE_UNHOLD
- Replies: 3
- Views: 5638
Re: Pad Hold ---- REG_DG_PAD_FORCE_UNHOLD
I set it to 0,GPIO21 hold it's level,and RTC GPIOs were also holded.
So I can't wakeup ESP32 from deep-sleep.
So I can't wakeup ESP32 from deep-sleep.
- Wed Aug 22, 2018 3:51 am
- Forum: Hardware
- Topic: Pad Hold ---- REG_DG_PAD_FORCE_UNHOLD
- Replies: 3
- Views: 5638
Pad Hold ---- REG_DG_PAD_FORCE_UNHOLD
hi.
I want set GPIO21 to low in deep sleep,it's not a RTC-GPIO.
So I want to use Pad Hold,but I don't find REG_DG_PAD_FORCE_UNHOLD in "esp32_technical_reference_manual_cn V3.4".
Where is it?How to use it?
Thanks in advance for your help!
I want set GPIO21 to low in deep sleep,it's not a RTC-GPIO.
So I want to use Pad Hold,but I don't find REG_DG_PAD_FORCE_UNHOLD in "esp32_technical_reference_manual_cn V3.4".
Where is it?How to use it?
Thanks in advance for your help!
- Fri May 11, 2018 2:05 am
- Forum: ESP-IDF
- Topic: ESP32-D2WD set GPIO17-U2TXD output 1
- Replies: 3
- Views: 5876
Re: ESP32-D2WD set GPIO17-U2TXD output 1
I think the flash use "SD_CMD, SD_CLK, SD_DATA_0 and SD_DATA_1",why it used GPIO16 and GPIO17?ESP_Sprite wrote:Datasheet of the ESP32, page 9: "ESP32-D2WD’s pins GPIO16, GPIO17, SD_CMD, SD_CLK, SD_DATA_0 and SD_DATA_1 are used for connecting the embedded flash, and are not recommended for other uses."