kasjer commented on issue #2944:
URL: https://github.com/apache/mynewt-core/issues/2944#issuecomment-1729331896
With syscfg that you have try this code:
```c
struct uart_conf uc = {
.uc_speed = 115200,
.uc_databits = 8,
.uc_stopbits = 1,
.uc_parity = UART_PARITY_NONE,
.uc_flow_ctl = UART_FLOW_CTL_NONE,
.uc_tx_char = NULL,
.uc_rx_char = NULL,
};
struct uart_dev *uart = uart_open("uart1", &uc);
uart_blocking_tx(uart, 'h');
```
using hal_uart_blocking_tx() requires more configuration that is done here
partially by syscfg `UART_1: 1` and by `uart_open()`
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