static void uart_setup(void)
{
u32 pins;
/* Enable GPIOA in run mode. */
periph_clock_enable(RCC_GPIOA);
/* Configure PA0 and PA1 as alternate function pins */
pins = GPIO0 | GPIO1;
GPIO_AFSEL(GPIOA) |= pins;
GPIO_DEN(GPIOA) |= pins;
/* PA0 and PA1 are muxed to UART0 during power on, by default */
/* Enable the UART clock */
periph_clock_enable(RCC_UART0);
/* We need a brief delay before we can access UART config registers */
__asm__("nop");
/* Disable the UART while we mess with its setings */
uart_disable(UART0);
/* Configure the UART clock source as precision internal oscillator */
uart_clock_from_piosc(UART0);
/* Set communication parameters */
uart_set_baudrate(UART0, 921600);
uart_set_databits(UART0, 8);
uart_set_parity(UART0, UART_PARITY_NONE);
uart_set_stopbits(UART0, 1);
/* Now that we're done messing with the settings, enable the UART */
uart_enable(UART0);
}
static void uart_setup(void)
{
/* Enable GPIOA in run mode. */
periph_clock_enable(RCC_GPIOA);
/* Mux PA0 and PA1 to UART0 (alternate function 1) */
gpio_set_af(GPIOA, 1, GPIO0 | GPIO1);
/* Enable the UART clock */
periph_clock_enable(RCC_UART0);
/* We need a brief delay before we can access UART config registers */
__asm__("nop");
/* Disable the UART while we mess with its setings */
uart_disable(UART0);
/* Configure the UART clock source as precision internal oscillator */
uart_clock_from_piosc(UART0);
/* Set communication parameters */
uart_set_baudrate(UART0, 921600);
uart_set_databits(UART0, 8);
uart_set_parity(UART0, UART_PARITY_NONE);
uart_set_stopbits(UART0, 1);
/* Now that we're done messing with the settings, enable the UART */
uart_enable(UART0);
}