Hi, @fofi144 It seems that you are using your own ISR handles. One thing to note when data is received, you should read the data out until the hw fifo is empty, and than clear the interrupt flag. otherwise, the interrupt status can never be cleared. @amruta It is not recommended to call "uart_write_...

Hi,
Why the SCL frequency changes during data transmission?

You can use i2s_out_eof interrupt, be sure that eof field in the DMA descriptor is set to 1.

Hi,
Can you provide you DMA link, maybe your DMA linked list is a circular list,

Hi, megomes
Please try the attachment

Hi, @persan666 Thanks for you feedback, from the picture we know that the timing is abnormal. Can you help with another test? in i2c.c, please find the function ` i2c_master_clear_bus` and change it to: ``` static esp_err_t i2c_master_clear_bus(i2c_port_t i2c_num) { return ESP_OK; } ``` I want to kn...

Hi,
Just found that the I2C driver in release / v3.2 is not up to date. Can you help try the master branch?

Hi Lucas.Hutchinson
The UART driver is for general purpose, so, some situations are not considered. If you want to know if the idle interrupt is happened, you can send an event in the interrupt to notify the task.

thanks !!

Hi, dedvalson
Did you solve your problem?

thanks !!

Hi, Jeremy
please call `rtc_gpio_hold_dis` to disable the gpio hold function first, the `rtc_gpio_isolate` have enabled the gpio hold functon and the gpio status can not be changed if this function is setted.

thanks !!