include/regs/xmega_usart.h

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#ifndef REGS_XMEGA_USART_H_INCLUDED
#define REGS_XMEGA_USART_H_INCLUDED

#include <io.h>



#define USART_DATA              0x00    //!< TX/RX Data Register
#define USART_STATUS            0x01    //!< Status Register
#define USART_CTRLA             0x03    //!< Control Register A
#define USART_CTRLB             0x04    //!< Control Register B
#define USART_CTRLC             0x05    //!< Control Register C
#define USART_BAUDCTRLA         0x06    //!< Baud Rate Register A
#define USART_BAUDCTRLB         0x07    //!< Baud Rate Register B



#define USART_RXB8_BIT          0       //!< Receive Bit 8
#define USART_PERR_BIT          2       //!< Parity Error
#define USART_BUFOVF_BIT        3       //!< Buffer Overflow
#define USART_FERR_BIT          4       //!< Frame Error
#define USART_DREIF_BIT         5       //!< Data Register Empty
#define USART_TXCIF_BIT         6       //!< Transmit Complete
#define USART_RXCIF_BIT         7       //!< Receive Complete



#define USART_DREINTLVL_START   0       //!< Data Reg Empty Interrupt Level
#define USART_DREINTLVL_SIZE    2       //!< Data Reg Empty Interrupt Level
#define USART_TXCINTLVL_START   2       //!< TX Complete Interrupt Level
#define USART_TXCINTLVL_SIZE    2       //!< TX Complete Interrupt Level
#define USART_RXCINTLVL_START   4       //!< RX Complete Interrupt Level
#define USART_RXCINTLVL_SIZE    2       //!< RX Complete Interrupt Level



#define USART_TXB8_BIT          0       //!< Transmit Bit 8
#define USART_MPCM_BIT          1       //!< Multi-processor Communication Mode
#define USART_CLK2X_BIT         2       //!< Double Transmission Speed
#define USART_TXEN_BIT          3       //!< Transmitter Enable
#define USART_RXEN_BIT          4       //!< Receiver Enable



#define USART_CHSIZE_START      0       //!< Character Size
#define USART_CHSIZE_SIZE       3       //!< Character Size
#define USART_SBMODE_START      3       //!< Stop Bit Mode
#define USART_SBMODE_SIZE       1       //!< Stop Bit Mode
#define USART_PMODE_START       4       //!< Parity Mode
#define USART_PMODE_SIZE        2       //!< Parity Mode
#define USART_CMODE_START       6       //!< Communication Mode
#define USART_CMODE_SIZE        2       //!< Communication Mode



#define USART_BSELB_START       0       //!< Baud Rate bits 8..11
#define USART_BSELB_SIZE        4       //!< Baud Rate bits 8..11
#define USART_BSCALE_START      4       //!< Baud Rate Scale factor
#define USART_BSCALE_SIZE       4       //!< Baud Rate Scale factor




#define USART_BIT(name)                                         \
        (1U << USART_##name##_BIT)

#define USART_BF(name, value)                                   \
        ((value) << USART_##name##_START)

#define USART_BFEXT(name, regval)                               \
        (((regval) >> USART_##name##_START)                     \
                & ((1U << USART_##name##_SIZE) - 1))

#define USART_BFINS(name, value, regval)                        \
        (((regval) & ~(((1U << USART_##name##_SIZE) - 1)        \
                        << USART_##name##_START))               \
                | USART_BF(name, value))




#define usart_read_reg(usart, reg) \
        mmio_read8((void *)((uintptr_t)(usart) + USART_##reg))

#define usart_write_reg(usart, reg, value) \
        mmio_write8((void *)((uintptr_t)(usart) + USART_##reg), value)



#endif /* REGS_XMEGA_USART_H_INCLUDED */

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