usart.h

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/*
 * SPDX-License-Identifier: GPL-3.0-only
 * This file is part of Lazuli.
 */
 
#ifndef LAZULI_SYS_ARCH_AVR_USART_H
#define LAZULI_SYS_ARCH_AVR_USART_H
 
#include <stdint.h>
 
#include <Lazuli/common.h>
 
_EXTERN_C_DECL_BEGIN
 
/*
 * USART Register Definitions.
 * Ordered by address.
 */
 
#define UCSR0A DIRECT(0xc0)
 
#define UCSR0B DIRECT(0xc1)
 
#define UCSR0C DIRECT(0xc2)
 
#define UBRROL DIRECT(0xc4)
 
#define UBRR0H DIRECT(0xc5)
 
#define UDR0   DIRECT(0xc6)
 
typedef struct {
  volatile uint8_t ucsr0a;    
  volatile uint8_t ucsr0b;    
  volatile uint8_t ucsr0c;    
  volatile uint8_t _reserved; 
  volatile uint8_t ubrr0l;    
  volatile uint8_t ubrr0h;    
  volatile uint8_t udr0;      
}Usart;
 
enum {
  UCSR0A_RXC0  = POSITION(7U), 
  UCSR0A_TXC0  = POSITION(6U), 
  UCSR0A_UDRE0 = POSITION(5U), 
  UCSR0A_FE0   = POSITION(4U), 
  UCSR0A_DOR0  = POSITION(3U), 
  UCSR0A_UPE0  = POSITION(2U), 
  UCSR0A_U2X0  = POSITION(1U), 
  UCSR0A_MPCM0 = POSITION(0U)  
};
 
enum {
  UCSR0B_RXCIE0 = POSITION(7U), 
  UCSR0B_TXCIE0 = POSITION(6U), 
  UCSR0B_UDRIE0 = POSITION(5U), 
  UCSR0B_RXEN0  = POSITION(4U), 
  UCSR0B_TXEN0  = POSITION(3U), 
  UCSR0B_UCSZ02 = POSITION(2U), 
  UCSR0B_RXB80  = POSITION(1U), 
  UCSR0B_TXB80  = POSITION(0U)  
};
 
enum {
  UCSR0C_UMSEL01 = POSITION(7U), 
  UCSR0C_UMSEL00 = POSITION(6U), 
  UCSR0C_UPM01   = POSITION(5U), 
  UCSR0C_UPM00   = POSITION(4U), 
  UCSR0C_USBS0   = POSITION(3U), 
  UCSR0C_UCSZ01  = POSITION(2U), 
  UCSR0C_UCSZ00  = POSITION(1U), 
  UCSR0C_UCPOL0  = POSITION(0U)  
};
 
_EXTERN_C_DECL_END
 
#endif /* LAZULI_SYS_ARCH_AVR_USART_H */