usart.h

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#ifndef _USART_H_
#define _USART_H_

#include <avr32/io.h>
#include "errno.h"

struct usart_options_t
{
        unsigned long baudrate;

        unsigned char charlength;

        unsigned char paritytype;

        unsigned short stopbits;

        unsigned char channelmode;
};


struct iso7816_options_t
{
        /*
         * Set the frequency of the ISO7816 clock
         */
        unsigned long iso7816_hz;

        /*
         * The number of ISO7816 clock tick in every bit period (1-2047, 0=disable clock)
         * Bit rate = iso7816_hz / fidi_ratio
         */
        unsigned short fidi_ratio;

        /*
         * Inhibit Non Acknowledge
         * - 0 - The NACK is generated
         * - 1 - The NACK is not generated
         * .
         * Note: This bit will be used only in ISO7816 mode, protocol T = 0 receiver
         */
        int inhibit_nack;

        /*
         * Disable Successive NACK \n\n
         * Successive parity errors are counted up to the value in the max_iterations field. \n
         * These parity errors generate a NACK on the ISO line. As soon as this value is reached, \n
         * no addititional NACK is sent on the ISO line. The flag ITERATION is asserted. \n
         */
        int dis_suc_nack;

        /*
         * Max number of repetitions (0 - 7)
         */
        unsigned char max_iterations;

        /*
         * Bitorder in transmitted characters
         * - 0 - LSB first
         * - 1 - MSB first
         */
        int bit_order;
};

 /*---------------------------------------------------------------------------+
 |                                                                                                |
 |                           INITIALIZATION FUNCTIONS                |
 |                                                                                                |
 +---------------------------------------------------------------------------*/

void usart_reset( volatile struct avr32_usart_t * usart );


int usart_init_rs232( volatile struct avr32_usart_t * usart, struct usart_options_t * opt, long cpu_hz );


 /*---------------------------------------------------------------------------+
 |                                                                                                |
 |                         TRANSMIT/RECEIVE FUNCTIONS         |
 |                                                                                                |
 +---------------------------------------------------------------------------*/

int usart_send_addr(volatile struct avr32_usart_t * usart, int addr);


int usart_write_char(volatile struct avr32_usart_t * usart, int c);


inline void usart_bw_write_char(volatile struct avr32_usart_t * usart, int c);

int usart_putchar(volatile struct avr32_usart_t * usart, int c);

int usart_read_char(volatile struct avr32_usart_t * usart, int * c);

int usart_getchar(volatile struct avr32_usart_t * usart);

void usart_reset_status(volatile struct avr32_usart_t * usart);

#define USART_DEFAULT_TIMEOUT  10000

#define USART_EVEN_PARITY       0

#define USART_ODD_PARITY        1

#define USART_SPACE_PARITY      2

#define USART_MARK_PARITY       3

#define USART_NO_PARITY         4

#define USART_MULTIDROP_PARITY  6

#define USART_MODE_NORMAL       0x00

#define USART_MODE_RS485        0x01

#define USART_MODE_HW_HSH       0x02

#define USART_MODE_MODEM        0x03

#define USART_MODE_ISO7816_T0   0x04

#define USART_MODE_ISO7816_T1   0x06

#define USART_MODE_IRDA         0x08

#define USART_MODE_SW_HSH       0x0C

#define USART_NORMAL_CHMODE     0

#define USART_AUTO_ECHO         1

#define USART_LOCAL_LOOPBACK    2

#define USART_REMOTE_LOOPBACK   3

#define USART_1_STOPBIT         0

#define USART_1_5_STOPBITS      1

#define USART_2_STOPBITS        2

/*
        Interrupt sources. Use with interrupt registers in USART
*/

#define INT_RXRDY      0
#define INT_TXRDY      1
#define INT_RXBRK      2
#define INT_ENDRX      3
#define INT_ENDTX      4
#define INT_OVRE       5
#define INT_FRAM       6
#define INT_PARE       7
#define INT_TIMEOUT    8
#define INT_TXEMPTY    9
#define INT_ITERATION 10
#define INT_TXBUFE    11
#define INT_RXBUFF    12
#define INT_NACK      13
#define INT_RIIC      16
#define INT_DSRIC     17
#define INT_DCDIC     18
#define INT_CTSIC     19
#define INT_MANE      20

#endif //#ifndef _AVR32_USART_H_

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