MicroPython Forum (Archive)

I am attempting to use Firmware updat 1.14, after having been out of Micropython for a while. I am using a board that was previously used on firmware 1.9.3 and worked fine. however after creating a new board folder and using the PYBV11 files, with a few mods it compiles and runs, I am unable to access uart. When using UART(1,9600) "note also 1-4" it responds with


uart = UART('XB',9600)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ValueError: UART(1) doesn't exist


same response for
uart = UART(1,9600)
uart =UART(3,9600)
....

They were defined when the firmware was compiled as
// UART config
#define MICROPY_HW_UART1_NAME "XB"
#define MICROPY_HW_UART1_PORT (GPIOB)
#define MICROPY_HW_UART1_PINS (GPIO_PIN_6 | GPIO_PIN_7)
#define MICROPY_HW_UART2_PORT (GPIOD)
#define MICROPY_HW_UART2_PINS (GPIO_PIN_5 | GPIO_PIN_6)
#define MICROPY_HW_UART2_RTS (GPIO_PIN_4)
#define MICROPY_HW_UART2_CTS (GPIO_PIN_3)
#define MICROPY_HW_UART3_NAME "YB"
#define MICROPY_HW_UART3_PORT (GPIOB)
#define MICROPY_HW_UART3_PINS (GPIO_PIN_10 | GPIO_PIN_11)

I am wondering if newer firmware would have an issue with double defining in the
"mpconfigboard.h"
as in 1.9.3 i had them defined for I2c,SPI, and UART with no problem ... is this now an issue?

UART, SPI and I2C are classes of the machine module. Did you call

from machine import UART

upfront?