ESPTerm - ESP8266 terminal emulator. Branches: [master] patches, [work] next release
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espterm-firmware/user/uart_driver.h

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4.8 KiB

/**
* Low level UART peripheral support functions
*/
/*
* File : uart.h
* Copyright (C) 2013 - 2016, Espressif Systems
* Copyright (C) 2016, Ondřej Hruška (cleaning, modif.)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of version 3 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef UART_APP_H
#define UART_APP_H
#include "uart_register.h"
#include "eagle_soc.h"
#include "c_types.h"
// ===========
// timeout for sending / receiving a char (default)
#define UART_TIMEOUT_US 5000
#define UART_TX_FULL_THRESH_VAL (UART_FIFO_LEN - 2) // if more than this many bytes in queue, don't write more
#define UART_TX_EMPTY_THRESH_VAL 16
// ===========
typedef enum {
UART0 = 0,
UART1 = 1
} UARTn;
typedef enum {
FIVE_BITS = 0x0,
SIX_BITS = 0x1,
SEVEN_BITS = 0x2,
EIGHT_BITS = 0x3
} UartBitsNum4Char;
typedef enum {
ONE_STOP_BIT = 0x1,
ONE_HALF_STOP_BIT = 0x2,
TWO_STOP_BIT = 0x3
} UartStopBitsNum;
typedef enum {
PARITY_NONE = 0x2,
PARITY_ODD = 1,
PARITY_EVEN = 0
} UartParityMode;
typedef enum {
PARITY_DIS = 0,
PARITY_EN = 1
} UartExistParity;
typedef enum {
UART_None_Inverse = 0x0,
UART_Rxd_Inverse = UART_RXD_INV,
UART_CTS_Inverse = UART_CTS_INV,
UART_Txd_Inverse = UART_TXD_INV,
UART_RTS_Inverse = UART_RTS_INV,
} UART_LineLevelInverse;
typedef enum {
BIT_RATE_300 = 300,
BIT_RATE_600 = 600,
BIT_RATE_1200 = 1200,
BIT_RATE_2400 = 2400,
BIT_RATE_4800 = 4800,
BIT_RATE_9600 = 9600,
BIT_RATE_19200 = 19200,
BIT_RATE_38400 = 38400,
BIT_RATE_57600 = 57600,
BIT_RATE_74880 = 74880,
BIT_RATE_115200 = 115200,
BIT_RATE_230400 = 230400,
BIT_RATE_460800 = 460800,
BIT_RATE_921600 = 921600,
BIT_RATE_1843200 = 1843200,
BIT_RATE_3686400 = 3686400,
} UartBautRate;
typedef enum {
NONE_CTRL,
HARDWARE_CTRL,
XON_XOFF_CTRL
} UartFlowCtrl;
typedef enum {
USART_HWFlow_None = 0x0,
USART_HWFlow_RTS = 0x1,
USART_HWFlow_CTS = 0x2,
USART_HWFlow_CTS_RTS = 0x3
} UART_HwFlowCtrl;
typedef enum {
EMPTY,
UNDER_WRITE,
WRITE_OVER
} RcvMsgBuffState;
typedef struct {
uint32 RcvBuffSize;
uint8 *pRcvMsgBuff;
uint8 *pWritePos;
uint8 *pReadPos;
uint8 TrigLvl; //JLU: may need to pad
RcvMsgBuffState BuffState;
} RcvMsgBuff;
typedef struct {
uint32 TrxBuffSize;
uint8 *pTrxBuff;
} TrxMsgBuff;
typedef enum {
BAUD_RATE_DET,
WAIT_SYNC_FRM,
SRCH_MSG_HEAD,
RCV_MSG_BODY,
RCV_ESC_CHAR,
} RcvMsgState;
typedef struct {
UartBautRate baut_rate;
UartBitsNum4Char data_bits;
UartExistParity exist_parity;
UartParityMode parity;
UartStopBitsNum stop_bits;
UartFlowCtrl flow_ctrl;
RcvMsgBuff rcv_buff;
TrxMsgBuff trx_buff;
RcvMsgState rcv_state;
int received;
int buff_uart_no; //indicate which uart use tx/rx buffer
} UartDevice;
// UartDev is defined and initialized in rom code.
extern UartDevice UartDev;
//==============================================
// FIFO used count
#define UART_TxFifoCount(uart_no) ((READ_PERI_REG(UART_STATUS((uart_no))) >> UART_TXFIFO_CNT_S) & UART_TXFIFO_CNT)
#define UART_RxFifoCount(uart_no) ((READ_PERI_REG(UART_STATUS((uart_no))) >> UART_RXFIFO_CNT_S) & UART_RXFIFO_CNT)
STATUS UART_WriteCharCRLF(UARTn uart_no, uint8 c, uint32 timeout_us);
STATUS UART_WriteChar(UARTn uart_no, uint8 c, uint32 timeout_us);
STATUS UART_WriteString(UARTn uart_no, const char *str, uint32 timeout_us);
STATUS UART_WriteBuffer(UARTn uart_no, const uint8 *buffer, size_t len, uint32 timeout_us);
//==============================================
void UART_SetWordLength(UARTn uart_no, UartBitsNum4Char len);
void UART_SetStopBits(UARTn uart_no, UartStopBitsNum bit_num);
void UART_SetLineInverse(UARTn uart_no, UART_LineLevelInverse inverse_mask);
void UART_SetParity(UARTn uart_no, UartParityMode Parity_mode);
void UART_SetBaudrate(UARTn uart_no, uint32 baud_rate);
void UART_SetFlowCtrl(UARTn uart_no, UART_HwFlowCtrl flow_ctrl, uint8 rx_thresh);
void UART_WaitTxFifoEmpty(UARTn uart_no , uint32 time_out_us); //do not use if tx flow control enabled
void UART_ResetFifo(UARTn uart_no);
void UART_ClearIntrStatus(UARTn uart_no, uint32 clr_mask);
void UART_SetIntrEna(UARTn uart_no, uint32 ena_mask);
void UART_SetPrintPort(UARTn uart_no);
bool UART_CheckOutputFinished(UARTn uart_no, uint32 time_out_us);
//==============================================
#endif