/*
* @brief Changes the baudrate of UART channel.
*
* @param UART_t * Pointer to the UART APP handle.
* @param baud Value of new baudrate.
* @param oversampling Number of samples to be considered for each symbol. 16 is the standard value.
*
* @return UART_STATUS_t UART_STATUS_SUCCESS if baudrate changed successfully.
* UART_STATUS_BUSY if the UART channel is busy.
*
* \par<b>Description:</b><br>
* The function stops the channel, calculates the clock divider values to achieve the desired baudrate.
* Sets the divider values and reconfigures the channel as per the configuration in the UI. The channel is
* enabled at the end of configuration.
*/
UART_STATUS_t UART_SetBaudrate(const UART_t * handle, uint32_t baud, uint32_t oversampling)
{
UART_STATUS_t ret_stat = UART_STATUS_BUSY;
const UART_TX_CONFIG_t * ptr_tx_conf = handle->config->tx_pin_config;
XMC_ASSERT("UART_SetBaudrate: UART APP handle invalid", ((handle != NULL)&&
((handle->config != NULL) && (handle->runtime != NULL))))
if ((handle->runtime->tx_busy == false) && (handle->runtime->rx_busy == false))
{
/* Set UART TX pin as input pin to avoid spikes on the pin.*/
if (handle->config->mode != UART_MODE_LOOPBACK)
{
XMC_GPIO_SetMode(ptr_tx_conf->port, ptr_tx_conf->pin, XMC_GPIO_MODE_INPUT_TRISTATE);
}
/* Stop the UART channel before changing the baudrate.*/
if (XMC_UART_CH_Stop(handle->channel) == XMC_UART_CH_STATUS_OK)
{
/*Change the baudrate*/
ret_stat = (UART_STATUS_t)XMC_UART_CH_SetBaudrate(handle->channel, baud, oversampling);
/*Set the sample point if the baudrate is modified*/
if (ret_stat == UART_STATUS_SUCCESS)
{
XMC_UART_CH_SetSamplePoint(handle->channel, (uint32_t)(oversampling >> 1U)+1U);
}
/*Enable UART*/
XMC_UART_CH_Start(handle->channel);
/* Initialize UART TX pin */
if (handle->config->mode != UART_MODE_LOOPBACK)
{
XMC_GPIO_Init(ptr_tx_conf->port, ptr_tx_conf->pin, ptr_tx_conf->config);
}
}
int main(void)
{
XMC_GPIO_SetMode(XMC_GPIO_PORT$$com.sysprogs.examples.ledblink.LEDPORT$$, $$com.sysprogs.examples.ledblink.LEDBIT$$, XMC_GPIO_MODE_OUTPUT_PUSH_PULL);
unsigned periodInMsec = $$com.sysprogs.examples.ledblink.DELAYMSEC$$;
SysTick_Config((SystemCoreClock / 1000) * periodInMsec);
for (;;)
{
}
}
void configureBccuGlobal() {
if (gBccuConfigured) {
return;
}
XMC_BCCU_GlobalInit(BCCU, &kBCCUGlobalConfig);
BCCU->CHTRIG = 0;
#ifdef XMC_BCCU_CH0_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH0_PIN, XMC_BCCU_CH0_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH1_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH1_PIN, XMC_BCCU_CH1_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH2_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH2_PIN, XMC_BCCU_CH2_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH3_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH3_PIN, XMC_BCCU_CH3_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH4_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH4_PIN, XMC_BCCU_CH4_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH5_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH5_PIN, XMC_BCCU_CH5_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH6_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH6_PIN, XMC_BCCU_CH6_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH7_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH7_PIN, XMC_BCCU_CH7_PIN_MODE);
#endif
#ifdef XMC_BCCU_CH8_PIN
XMC_GPIO_SetMode(XMC_BCCU_CH8_PIN, XMC_BCCU_CH8_PIN_MODE);
#endif
gBccuConfigured = true;
}
