Hello guys,
i have made a custom board with SAMD21 and arduino zero bootloader that exposes pin PB22 (EDBG_UART TX | *SERCOM5/PAD[2]).
I would like to use it as a RX pin and not TX, is this possible? i have tried to change the variant.h
// Serial (EDBG)
#define PIN_SERIAL_RX (31ul)
#define PIN_SERIAL_TX (30ul)
#define PAD_SERIAL_TX (UART_TX_PAD_2)
#define PAD_SERIAL_RX (SERCOM_RX_PAD_3)
to this
// Serial (EDBG)
#define PIN_SERIAL_RX (30ul)
#define PIN_SERIAL_TX (31ul)
#define PAD_SERIAL_TX (UART_TX_PAD_2)
#define PAD_SERIAL_RX (SERCOM_RX_PAD_2)
with no success
do you have any idea how can i use PB22 pin on SAMD21 as Serial RX line??
thank you very much!!