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cpu/efm32/uart: don't enable rx if no callback is configured

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This commit is contained in:
Thomas Stilwell 2019-09-15 07:58:55 -05:00
parent c8f34c705b
commit 5fb6801cca
1 changed files with 28 additions and 4 deletions
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32
cpu/efm32/periph/uart.c
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@ -143,8 +143,10 @@ int uart_init(uart_t dev, uint32_t baudrate, uart_rx_cb_t rx_cb, void *arg)
#endif
/* enable the interrupt */
NVIC_ClearPendingIRQ(uart_config[dev].irq);
NVIC_EnableIRQ(uart_config[dev].irq);
if (rx_cb) {
NVIC_ClearPendingIRQ(uart_config[dev].irq);
NVIC_EnableIRQ(uart_config[dev].irq);
}
uart_poweron(dev);
@ -212,12 +214,30 @@ void uart_poweron(uart_t dev)
if (_is_usart(dev)) {
#endif
USART_TypeDef *usart = uart_config[dev].dev;
USART_Enable(usart, usartEnable);
/* enable tx */
USART_Enable_TypeDef enable = usartEnableTx;
/* enable rx if needed */
if (isr_ctx[dev].rx_cb) {
enable |= usartEnableRx;
}
USART_Enable(usart, enable);
#ifdef USE_LEUART
}
else {
LEUART_TypeDef *leuart = uart_config[dev].dev;
LEUART_Enable(leuart, leuartEnable);
/* enable tx */
LEUART_Enable_TypeDef enable = leuartEnableTx;
/* enable rx if needed */
if (isr_ctx[dev].rx_cb) {
enable |= leuartEnableRx;
}
LEUART_Enable(leuart, enable);
}
#endif
}
@ -228,11 +248,15 @@ void uart_poweroff(uart_t dev)
if (_is_usart(dev)) {
#endif
USART_TypeDef *usart = uart_config[dev].dev;
/* disable tx and rx */
USART_Enable(usart, usartDisable);
#ifdef USE_LEUART
}
else {
LEUART_TypeDef *leuart = uart_config[dev].dev;
/* disable tx and rx */
LEUART_Enable(leuart, leuartDisable);
}
#endif