2013-01-08 21:05:02 +08:00
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#ifndef __RT_HW_SERIAL_H__
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#define __RT_HW_SERIAL_H__
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#include <rthw.h>
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#include <rtthread.h>
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#define USTAT_RCV_READY 0x01 /* receive data ready */
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#define USTAT_TXB_EMPTY 0x02 /* tx buffer empty */
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#define BPS 115200 /* serial baudrate */
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#define UART_RX_BUFFER_SIZE 64
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#define UART_TX_BUFFER_SIZE 64
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struct serial_int_rx
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{
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rt_uint8_t rx_buffer[UART_RX_BUFFER_SIZE];
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rt_uint32_t read_index, save_index;
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};
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struct serial_int_tx
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{
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rt_uint8_t tx_buffer[UART_TX_BUFFER_SIZE];
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rt_uint32_t write_index, save_index;
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};
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typedef struct uartport
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{
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volatile rt_uint16_t rbr_thr; //receive buffer register and transmit hold register
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volatile rt_uint16_t reserved0;
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volatile rt_uint16_t reserved1;
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volatile rt_uint16_t reserved2;
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volatile rt_uint16_t reserved3;
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volatile rt_uint16_t reserved4;
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volatile rt_uint16_t reserved5;
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volatile rt_uint16_t reserved6;
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volatile rt_uint16_t reserved7;
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volatile rt_uint16_t reserved8;
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volatile rt_uint16_t lsr; //line status register
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}uartport;
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struct serial_device
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{
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uartport* uart_device;
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/* rx structure */
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struct serial_int_rx* int_rx;
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/* tx structure */
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struct serial_int_tx* int_tx;
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};
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rt_err_t rt_hw_serial_register(rt_device_t device, const char* name, rt_uint32_t flag, struct serial_device *serial);
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void rt_hw_serial_isr(rt_device_t device);
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#endif
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