#ifndef UART_H
#define UART_H

#include <stdint.h>

// RS485 baud rate
#define UART1_BAUD_RATE 9600
#define UART2_BAUD_RATE 115200

// APB1 bus clock is half the system core clock
#define APB1_CLOCK (FUNCONF_SYSTEM_CORE_CLOCK / 2)

// Calculate baud rate divisors
// Adds BAUD_RATE/2 for rounding to nearest integer
#define UART_BRR_APB1 \
  (((APB1_CLOCK) + (UART2_BAUD_RATE / 2)) / (UART2_BAUD_RATE))
#define UART_BRR_APB2 \
  (((FUNCONF_SYSTEM_CORE_CLOCK) + (UART1_BAUD_RATE / 2)) / (UART1_BAUD_RATE))

// Function prototypes

// UART2
void uart2_init(int uart_brr);

// RS485 functions
void rs485_init(int uart_brr);
void rs485_send(uint8_t *buf, uint16_t len);
uint8_t rs485_available(void);
uint8_t rs485_read(void);

#endif  // UART_H