static void uart_init(void)
{
/* set baudrate */
STM32_USART_BRR(UARTN) =
DIV_ROUND_NEAREST(CPU_CLOCK, CONFIG_UART_BAUD_RATE);
/* UART enabled, 8 Data bits, oversampling x16, no parity */
STM32_USART_CR1(UARTN) =
STM32_USART_CR1_UE | STM32_USART_CR1_TE | STM32_USART_CR1_RE;
/* 1 stop bit, no fancy stuff */
STM32_USART_CR2(UARTN) = 0x0000;
/* DMA disabled, special modes disabled, error interrupt disabled */
STM32_USART_CR3(UARTN) = 0x0000;
}
static void usart_variant_enable(struct usart_config const *config)
{
/* Use single-bit sampling */
STM32_USART_CR3(config->hw->base) |= STM32_USART_CR3_ONEBIT;
/*
* Make sure we register this config before enabling the HW.
* If we did it the other way around the FREQ_CHANGE hook could be
* called before we update the configs array and we would miss the
* clock frequency change event, leaving our baud rate divisor wrong.
*/
configs[config->hw->index] = config;
usart_set_baud_f0_l(config, clock_get_freq());
task_enable_irq(config->hw->irq);
}
