nrf/mphalport: Use wfi to save power while waiting at the UART REPL.

9cf1cbb0 · Damien George · 456c89f7 · 9cf1cbb0
Commit 9cf1cbb0 authored May 22, 2019 by Damien George
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ports/nrf/mphalport.c ports/nrf/mphalport.c +1 -0

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--- a/ports/nrf/mphalport.c
+++ b/ports/nrf/mphalport.c
@@ -58,6 +58,7 @@ int mp_hal_stdin_rx_chr(void) {
        if (MP_STATE_PORT(board_stdio_uart) != NULL && uart_rx_any(MP_STATE_PORT(board_stdio_uart))) {
            return uart_rx_char(MP_STATE_PORT(board_stdio_uart));
        }
+        __WFI();
    }

    return 0;