ESP32-S3 I2S problem using GPIO41
Posted: Wed Nov 27, 2024 2:28 am
I have a new board, using the ESP32-S3-WROOM-2 module and have I2S connected to:
I2S is not working and there are signals on all pins, except GPIO_41.
I'm aware this is normally JTAG MTDI.
I have added the following 4 lines of code to reconfigure the JTAG pins to GPIO in the beginning of my code:
This worked on another board, where I couldn't get GPIO to work correctly until I remembered these pins are JTAG by default.
I did not use I2S on the pins then, only "regular" GPIO and for GPIO41 (MTDI) it was being used as an input.
So, it looks like my gpio_reset_pin doesn't work as intended.
Is it even possible to reconfigure the pins like this (or in some other way)?
I'm aware that it can be done in eFuse, but I don't want to go there, it's a one-way street and complicate production.
I tried mapping GPIO_I2S_BCK to my only free GPIO and I2S then worked as intended.
Something that tells me that JTAG is NOT turned off is that when I, initially, connected the new GPIO_I2S_BCK to GPIO41 and the trace to the codec, the board went nuts. I had to cut the trace so the signal didn't go back to the ESP32-S3.
Code: Select all
#define GPIO_I2S_MCLK GPIO_NUM_39
#define GPIO_I2S_SD GPIO_NUM_40
#define GPIO_I2S_BCK GPIO_NUM_41
#define GPIO_I2S_WS GPIO_NUM_42I'm aware this is normally JTAG MTDI.
I have added the following 4 lines of code to reconfigure the JTAG pins to GPIO in the beginning of my code:
Code: Select all
gpio_reset_pin(GPIO_I2S_MCLK); // 39
gpio_reset_pin(GPIO_I2S_SD); // 40
gpio_reset_pin(GPIO_I2S_BCK); // 41
gpio_reset_pin(GPIO_I2S_WS); // 42
I did not use I2S on the pins then, only "regular" GPIO and for GPIO41 (MTDI) it was being used as an input.
So, it looks like my gpio_reset_pin doesn't work as intended.
Is it even possible to reconfigure the pins like this (or in some other way)?
I'm aware that it can be done in eFuse, but I don't want to go there, it's a one-way street and complicate production.
I tried mapping GPIO_I2S_BCK to my only free GPIO and I2S then worked as intended.
Something that tells me that JTAG is NOT turned off is that when I, initially, connected the new GPIO_I2S_BCK to GPIO41 and the trace to the codec, the board went nuts. I had to cut the trace so the signal didn't go back to the ESP32-S3.