Console demo does not read serial data when pin numbers are changed. (IDFGH-505)

[tommessick]

Environment

• Development Kit: none
• Module or chip used: ESP32-WROOM-32
• IDF version: v3.3-dev-424-g8b885fb93
• Build System: Make
• Compiler version: crosstool-ng-1.22.0-80-g6c4433a
• Operating System: Linux
• Power Supply: external 5V

I am running the console example from the IDF. If I build it with no changes it uses UART0 over the default pins and works fine.

The ESP32-WROOM-32 is on a board with an RS232 port through a MAX3232. Pin 32 is TX and pin 33 is RX. I have code that sends and receives data over these pins so I am sure they are wired up correctly.

If I use make menuconfig to configure the console to use pins 32 and 33 the console demo prints to the serial port but cannot receive any data.

I don't have a JTAG debugger. In uart.c uart_rx_intr_handler_default() there is code to check for these bits:
UART_RXFIFO_TOUT_INT_ST_M
UART_RXFIFO_FULL_INT_ST_M
UART_AT_CMD_CHAR_DET_INT_ST_M
I have modified uart.c to cause an exception when a character is received. I get the exception when i use the original UART setup but not when I switch to the other pins.

I have used make menuconfig to select UART0 or UART1 with the same results.

sdkconfig.txt
uart.c.txt

[koobest]

Can you provide you UART pin configuration?

[tommessick]

This is the unaltered example from the IDF in examples/system/console.

[koobest]

@tommessick
You need to configure the pins, because the default log output uses UART0 and the pins are already configured during the boot stage.

[tommessick]

Adding this line:

gpio_set_direction(GPIO_NUM_33, `GPIO_MODE_DEF_INPUT);

before the call to initialize_console() fixed the problem.
Thanks.

[igrr]

Thanks for the feedback, will keep this open until this is fixed in IDF.

[KonstantinKondrashov]

Fix for this issue is in our internal repo, it will be merged as soon as possible. Thanks.