diff options
Diffstat (limited to 'src/atsamd/serial.c')
| -rw-r--r-- | src/atsamd/serial.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/atsamd/serial.c b/src/atsamd/serial.c index 91e85796..fd7dcaac 100644 --- a/src/atsamd/serial.c +++ b/src/atsamd/serial.c @@ -5,27 +5,30 @@ // This file may be distributed under the terms of the GNU GPLv3 license. #include "board/serial_irq.h" // serial_rx_data +#include "command.h" // DECL_CONSTANT_STR #include "internal.h" // enable_pclock #include "sched.h" // DECL_INIT +DECL_CONSTANT_STR("RESERVE_PINS_serial", "PA11,PA10"); + void serial_init(void) { // Enable serial clock enable_pclock(SERCOM0_GCLK_ID_CORE, ID_SERCOM0); // Enable pins - gpio_peripheral(GPIO('A', 10), 'C', 0); gpio_peripheral(GPIO('A', 11), 'C', 0); + gpio_peripheral(GPIO('A', 10), 'C', 0); // Configure serial SercomUsart *su = &SERCOM0->USART; su->CTRLA.reg = 0; uint32_t areg = (SERCOM_USART_CTRLA_MODE(1) | SERCOM_USART_CTRLA_DORD | SERCOM_USART_CTRLA_SAMPR(1) - | SERCOM_USART_CTRLA_TXPO(1) - | SERCOM_USART_CTRLA_RXPO(3)); + | SERCOM_USART_CTRLA_RXPO(3) + | SERCOM_USART_CTRLA_TXPO(1)); su->CTRLA.reg = areg; - su->CTRLB.reg = SERCOM_USART_CTRLB_TXEN | SERCOM_USART_CTRLB_RXEN; + su->CTRLB.reg = SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN; uint32_t freq = get_pclock_frequency(SERCOM0_GCLK_ID_CORE); uint32_t baud8 = freq / (2 * CONFIG_SERIAL_BAUD); su->BAUD.reg = (SERCOM_USART_BAUD_FRAC_BAUD(baud8 / 8) |