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samd/machine_uart: Check the UART TX pin assignment.

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Check, if TX is at Pad 0 (SAMD51), or Pad 0 or 2 (SAMD21).
This commit is contained in:
robert-hh 2022-11-24 11:51:09 +01:00 committed by Damien George
parent 5b1fd8802a
commit f78dd25a2c
1 changed files with 4 additions and 1 deletions
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5
ports/samd/machine_uart.c
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@ -263,8 +263,11 @@ STATIC mp_obj_t machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args
#if defined(MCU_SAMD21)
if (self->tx_pad_config.pad_nr == 2) { // Map pad 2 to TXPO = 1
txpo = 1;
}
} else
#endif
if (self->tx_pad_config.pad_nr != 0) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid tx pin"));
}
uart->USART.CTRLA.reg =
SERCOM_USART_CTRLA_DORD // Data order