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STM serial init: Set pin function only if pin is defined (not NC) #12186

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merged 1 commit into from
Jan 7, 2020
Merged

STM serial init: Set pin function only if pin is defined (not NC) #12186

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5 changes: 2 additions & 3 deletions targets/TARGET_STM/serial_api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -157,13 +157,12 @@ static void _serial_init_direct(serial_t *obj, const serial_pinmap_t *pinmap)
MBED_ASSERT(obj_s->index >= 0);

// Configure UART pins
pin_function(pinmap->tx_pin, pinmap->tx_function);
pin_function(pinmap->rx_pin, pinmap->rx_function);

if (pinmap->tx_pin != NC) {
pin_function(pinmap->tx_pin, pinmap->tx_function);
pin_mode(pinmap->tx_pin, PullUp);
}
if (pinmap->rx_pin != NC) {
pin_function(pinmap->rx_pin, pinmap->rx_function);
pin_mode(pinmap->rx_pin, PullUp);
}

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