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#ifndef __SERIAL_H__
#define __SERIAL_H__
#include "types.h"
#include "devices.h"
/* this structure is only for internal usage */
struct _usart_device
{
register_t buffer; // also used as LSB for divisor latch
struct IER
{
volatile int received_data_interrupt :1;
volatile int transmitter_empty_interrupt :1;
volatile int receiver_line_status_interrupt :1;
volatile int modem_status_interrupt :1;
volatile int reserved :4;
} IER;
struct IIR
{
volatile int interrupt_pending :1;
volatile int interrupt_id :3;
volatile int reserved :2;
volatile int fifos :2;
} IIR;
struct FCR
{
volatile int fifo_enable :1;
volatile int receiver_fifo_rst :1;
}
struct LCR
{
volatile int word_length :2;
volatile int stop_bits :1;
volatile int parity :1;
volatile int even_parity :1;
volatile int stick_parity :1;
volatile int break_control :1;
volatile int divisor_latch_access :1;
} LCR;
struct MCR
{
volatile int data_terminal_ready :1;
volatile int request_to_send :1;
volatile int out1;
volatile int out2;
volatile int loop;
volatile int autoflow :1;
volatile int reserved :2;
} MCR;
struct LSR
{
volatile int data_ready :1;
volatile int overrun_error :1;
volatile int parity_error :1;
volatile int framing_error :1;
volatile int break_interrupt :1;
volatile int transmitter_register :1;
volatile int transmitter_emtpy :1;
volatile int fifo_recv_error :1;
} LSR;
struct MSR
{
volatile int delta_cts :1;
volatile int delta_data_set_ready :1;
volatile int trailing_edge_ring_indicator :1;
volatile int delta_data_carrier_detect :1;
volatile int clear_to_send :1;
volatile int data_set_ready :1;
volatile int ring_indicator :1;
volatile int data_carrier_detect :1;
} MSR;
register_t scratch;
} *_usart = (_usart_device *) ADDR_DEV_USART;
#endif // __SERIAL__H__
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