rt-thread/bsp/thead-smart/drivers/ck_usart.h

93 lines
3.2 KiB
C

/*
* Copyright (C) 2017-2019 Alibaba Group Holding Limited
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2020-08-20 zx.chen header file for usart driver
*/
#ifndef __CK_USART_H
#define __CK_USART_H
#include <stdio.h>
#include "errno.h"
#include "soc.h"
#ifdef __cplusplus
extern "C" {
#endif
#define BAUDRATE_DEFAULT 19200
#define UART_BUSY_TIMEOUT 1000000
#define UART_RECEIVE_TIMEOUT 1000
#define UART_TRANSMIT_TIMEOUT 1000
#define UART_MAX_FIFO 0x10
/* UART register bit definitions */
#define USR_UART_BUSY 0x01
#define USR_UART_TFE 0x04
#define USR_UART_RFNE 0x08
#define LSR_DATA_READY 0x01
#define LSR_THR_EMPTY 0x20
#define IER_RDA_INT_ENABLE 0x01
#define IER_THRE_INT_ENABLE 0x02
#define IIR_RECV_LINE_ENABLE 0x04
#define IIR_NO_ISQ_PEND 0x01
#define LCR_SET_DLAB 0x80 /* enable r/w DLR to set the baud rate */
#define LCR_PARITY_ENABLE 0x08 /* parity enabled */
#define LCR_PARITY_EVEN 0x10 /* Even parity enabled */
#define LCR_PARITY_ODD 0xef /* Odd parity enabled */
#define LCR_WORD_SIZE_5 0xfc /* the data length is 5 bits */
#define LCR_WORD_SIZE_6 0x01 /* the data length is 6 bits */
#define LCR_WORD_SIZE_7 0x02 /* the data length is 7 bits */
#define LCR_WORD_SIZE_8 0x03 /* the data length is 8 bits */
#define LCR_STOP_BIT1 0xfb /* 1 stop bit */
#define LCR_STOP_BIT2 0x04 /* 1.5 stop bit */
#define DW_LSR_PFE 0x80
#define DW_LSR_TEMT 0x40
#define DW_LSR_THRE 0x40
#define DW_LSR_BI 0x10
#define DW_LSR_FE 0x08
#define DW_LSR_PE 0x04
#define DW_LSR_OE 0x02
#define DW_LSR_DR 0x01
#define DW_LSR_TRANS_EMPTY 0x20
#define DW_IIR_THR_EMPTY 0x02 /* threshold empty */
#define DW_IIR_RECV_DATA 0x04 /* received data available */
#define DW_IIR_RECV_LINE 0x06 /* receiver line status */
#define DW_IIR_CHAR_TIMEOUT 0x0c /* character timeout */
typedef struct
{
union
{
__IM uint32_t RBR; /* Offset: 0x000 (R/ ) Receive buffer register */
__OM uint32_t THR; /* Offset: 0x000 ( /W) Transmission hold register */
__IOM uint32_t DLL; /* Offset: 0x000 (R/W) Clock frequency division low section register */
};
union
{
__IOM uint32_t DLH; /* Offset: 0x004 (R/W) Clock frequency division high section register */
__IOM uint32_t IER; /* Offset: 0x004 (R/W) Interrupt enable register */
};
__IM uint32_t IIR; /* Offset: 0x008 (R/ ) Interrupt indicia register */
__IOM uint32_t LCR; /* Offset: 0x00C (R/W) Transmission control register */
uint32_t RESERVED0;
__IM uint32_t LSR; /* Offset: 0x014 (R/ ) Transmission state register */
__IM uint32_t MSR; /* Offset: 0x018 (R/ ) Modem state register */
uint32_t RESERVED1[24];
__IM uint32_t USR; /* Offset: 0x07c (R/ ) UART state register */
} ck_usart_reg_t;
#ifdef __cplusplus
}
#endif
#endif /* __CK_USART_H */