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cpu/stm32f0: uart: make sure that 'port' and 'dev' are !=NULL

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This fixes some cppcheck nullPointer errors.
This commit is contained in:
Matthias Kolja Miehl 2016-08-21 02:14:01 +02:00
parent 39ecc12d9d
commit 2ba795eb81
1 changed files with 6 additions and 0 deletions
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6
cpu/stm32f0/periph/uart.c
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@ -113,6 +113,12 @@ int init_base(uart_t uart, uint32_t baudrate)
return -1;
}
/* Make sure port and dev are != NULL here, i.e. that the variables are
* assigned in all non-returning branches of the switch at the top of this
* function. */
assert(port != NULL);
assert(dev != NULL);
/* configure RX and TX pins, set pin to use alternative function mode */
port->MODER &= ~(3 << (rx_pin * 2) | 3 << (tx_pin * 2));
port->MODER |= 2 << (rx_pin * 2) | 2 << (tx_pin * 2);