serial.h
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#ifndef __RT_HW_SERIAL_H__
#define __RT_HW_SERIAL_H__
#include <rthw.h>
#include <rtthread.h>
#define USTAT_RCV_READY 0x01 /* receive data ready */
#define USTAT_TXB_EMPTY 0x02 /* tx buffer empty */
#define BPS 115200 /* serial baudrate */
#define UART_RX_BUFFER_SIZE 64
#define UART_TX_BUFFER_SIZE 64
struct serial_int_rx
{
rt_uint8_t rx_buffer[UART_RX_BUFFER_SIZE];
rt_uint32_t read_index, save_index;
};
struct serial_int_tx
{
rt_uint8_t tx_buffer[UART_TX_BUFFER_SIZE];
rt_uint32_t write_index, save_index;
};
typedef struct uartport
{
volatile rt_uint16_t rbr_thr; //receive buffer register and transmit hold register
volatile rt_uint16_t reserved0;
volatile rt_uint16_t reserved1;
volatile rt_uint16_t reserved2;
volatile rt_uint16_t reserved3;
volatile rt_uint16_t reserved4;
volatile rt_uint16_t reserved5;
volatile rt_uint16_t reserved6;
volatile rt_uint16_t reserved7;
volatile rt_uint16_t reserved8;
volatile rt_uint16_t lsr; //line status register
}uartport;
struct serial_device
{
uartport* uart_device;
/* rx structure */
struct serial_int_rx* int_rx;
/* tx structure */
struct serial_int_tx* int_tx;
};
rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct serial_device *serial);
void rt_hw_serial_isr(rt_device_t device);
#endif