/*
* SPDX-FileCopyrightText: 2010-2023 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#pragma once
#include <stdint.h>
#include "ets_sys.h"
#include "soc/soc.h"
#include "soc/uart_reg.h"
#ifdef __cplusplus
extern "C" {
#endif
/** \defgroup uart_apis, uart configuration and communication related apis
* @brief uart apis
*/
/** @addtogroup uart_apis
* @{
*/
#define RX_BUFF_SIZE 0x400
#define TX_BUFF_SIZE 100
//uart int enalbe register ctrl bits
#define UART_RCV_INTEN BIT0
#define UART_TRX_INTEN BIT1
#define UART_LINE_STATUS_INTEN BIT2
//uart int identification ctrl bits
#define UART_INT_FLAG_MASK 0x0E
//uart fifo ctrl bits
#define UART_CLR_RCV_FIFO BIT1
#define UART_CLR_TRX_FIFO BIT2
#define UART_RCVFIFO_TRG_LVL_BITS BIT6
//uart line control bits
#define UART_DIV_LATCH_ACCESS_BIT BIT7
//uart line status bits
#define UART_RCV_DATA_RDY_FLAG BIT0
#define UART_RCV_OVER_FLOW_FLAG BIT1
#define UART_RCV_PARITY_ERR_FLAG BIT2
#define UART_RCV_FRAME_ERR_FLAG BIT3
#define UART_BRK_INT_FLAG BIT4
#define UART_TRX_FIFO_EMPTY_FLAG BIT5
#define UART_TRX_ALL_EMPTY_FLAG BIT6 // include fifo and shift reg
#define UART_RCV_ERR_FLAG BIT7
//send and receive message frame head
#define FRAME_FLAG 0x7E
typedef enum {
UART_LINE_STATUS_INT_FLAG = 0x06,
UART_RCV_FIFO_INT_FLAG = 0x04,
UART_RCV_TMOUT_INT_FLAG = 0x0C,
UART_TXBUFF_EMPTY_INT_FLAG = 0x02
} UartIntType; //consider bit0 for int_flag
typedef enum {
RCV_ONE_BYTE = 0x0,
RCV_FOUR_BYTE = 0x1,
RCV_EIGHT_BYTE = 0x2,
RCV_FOURTEEN_BYTE = 0x3
} UartRcvFifoTrgLvl;
typedef enum {
FIVE_BITS = 0x0,
SIX_BITS = 0x1,
SEVEN_BITS = 0x2,
EIGHT_BITS = 0x3
} UartBitsNum4Char;
typedef enum {
ONE_STOP_BIT = 1,
ONE_HALF_STOP_BIT = 2,
TWO_STOP_BIT = 3
} UartStopBitsNum;
typedef enum {
NONE_BITS = 0,
ODD_BITS = 2,
EVEN_BITS = 3
} UartParityMode;
typedef enum {
STICK_PARITY_DIS = 0,
STICK_PARITY_EN = 2
} UartExistParity;
typedef enum {
BIT_RATE_9600 = 9600,
BIT_RATE_19200 = 19200,
BIT_RATE_38400 = 38400,
BIT_RATE_57600 = 57600,
BIT_RATE_115200 = 115200,
BIT_RATE_230400 = 230400,
BIT_RATE_460800 = 460800,
BIT_RATE_921600 = 921600
} UartBautRate;
typedef enum {
NONE_CTRL,
HARDWARE_CTRL,
XON_XOFF_CTRL
} UartFlowCtrl;
typedef enum {
EMPTY,
UNDER_WRITE,
WRITE_OVER
} RcvMsgBuffState;
typedef struct {
uint8_t *pRcvMsgBuff;
uint8_t *pWritePos;
uint8_t *pReadPos;
uint8_t TrigLvl;
RcvMsgBuffState BuffState;
} RcvMsgBuff;
typedef struct {
uint32_t TrxBuffSize;
uint8_t *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; // chip size in byte
UartStopBitsNum stop_bits;
UartFlowCtrl flow_ctrl;
uint8_t buff_uart_no; //indicate which uart use tx/rx buffer
RcvMsgBuff rcv_buff;
// TrxMsgBuff trx_buff;
RcvMsgState rcv_state;
int received;
} UartDevice;
/**
* @brief Init uart device struct value and reset uart0/uart1 rx.
* Please do not call this function in SDK.
*
* @param rxBuffer, must be a pointer to RX_BUFF_SIZE bytes or NULL
*
* @return None
*/
void uartAttach(void *rxBuffer);
/**
* @brief Init uart0 or uart1 for UART download booting mode.
* Please do not call this function in SDK.
*
* @param uint8_t uart_no : 0 for UART0, else for UART1.
*
* @param uint32_t clock : clock used by uart module, to adjust baudrate.
*
* @return None
*/
void Uart_Init(uint8_t uart_no, uint32_t clock);
/**
* @brief Modify uart baudrate.
* This function will reset RX/TX fifo for uart.
*
* @param uint8_t uart_no : 0 for UART0, 1 for UART1.
*
* @param uint32_t DivLatchValue : (clock << 4)/baudrate.
*
* @return None
*/
void uart_div_modify(uint8_t uart_no, uint32_t DivLatchValue);
/**
* @brief Switch printf channel of uart_tx_one_char.
* Please do not call this function when printf.
*
* @param uint8_t uart_no : 0 for UART0, 1 for UART1.
*
* @return None
*/
void uart_tx_switch(uint8_t uart_no);
/**
* @brief Output a char to printf channel, wait until fifo not full.
*
* @param None
*
* @return OK.
*/
ETS_STATUS uart_tx_one_char(uint8_t TxChar);
/**
* @brief Output a char to message exchange channel, wait until fifo not full.
* Please do not call this function in SDK.
*
* @param None
*
* @return OK.
*/
ETS_STATUS uart_tx_one_char2(uint8_t TxChar);
/**
* @brief Wait until uart tx full empty.
*
* @param uint8_t uart_no : 0 for UART0, 1 for UART1.
*
* @return None.
*/
void uart_tx_flush(uint8_t uart_no);
/**
* @brief Wait until uart tx full empty and the last char send ok.
*
* @param uart_no : 0 for UART0, 1 for UART1, 2 for UART2
*
* The function defined in ROM code has a bug, so we define the correct version
* here for compatibility.
*/
void uart_tx_wait_idle(uint8_t uart_no);
/**
* @brief Get an input char from message channel.
* Please do not call this function in SDK.
*
* @param uint8_t *pRxChar : the pointer to store the char.
*
* @return OK for successful.
* FAIL for failed.
*/
ETS_STATUS uart_rx_one_char(uint8_t *pRxChar);
/**
* @brief Get an input char from message channel, wait until successful.
* Please do not call this function in SDK.
*
* @param None
*
* @return char : input char value.
*/
char uart_rx_one_char_block(void);
/**
* @brief Get an input string line from message channel.
* Please do not call this function in SDK.
*
* @param uint8_t *pString : the pointer to store the string.
*
* @param uint8_t MaxStrlen : the max string length, incude '\0'.
*
* @return OK.
*/
ETS_STATUS UartRxString(uint8_t *pString, uint8_t MaxStrlen);
/**
* @brief Get an char from receive buffer.
* Please do not call this function in SDK.
*
* @param RcvMsgBuff *pRxBuff : the pointer to the struct that include receive buffer.
*
* @param uint8_t *pRxByte : the pointer to store the char.
*
* @return OK for successful.
* FAIL for failed.
*/
ETS_STATUS uart_rx_readbuff( RcvMsgBuff *pRxBuff, uint8_t *pRxByte);
/**
* @brief Get uart configuration struct.
* Please do not call this function in SDK.
*
* @param None
*
* @return UartDevice * : uart configuration struct pointer.
*/
UartDevice *GetUartDevice(void);
/**
* @brief Send an packet to download tool, with SLIP escaping.
* Please do not call this function in SDK.
*
* @param uint8_t *p : the pointer to output string.
*
* @param int len : the string length.
*
* @return None.
*/
void send_packet(uint8_t *p, int len);
/**
* @brief Receive an packet from download tool, with SLIP escaping.
* Please do not call this function in SDK.
*
* @param uint8_t *p : the pointer to input string.
*
* @param int len : If string length > len, the string will be truncated.
*
* @param uint8_t is_sync : 0, only one UART module;
* 1, two UART modules.
*
* @return int : the length of the string.
*/
int recv_packet(uint8_t *p, int len, uint8_t is_sync);
/**
* @brief Initialize the USB ACM UART
* Needs to be fed a buffer of at least 128 bytes, plus any rx buffer you may want to have.
*
* @param cdc_acm_work_mem Pointer to work mem for CDC-ACM code
* @param cdc_acm_work_mem_len Length of work mem
*/
void Uart_Init_USB(void *cdc_acm_work_mem, int cdc_acm_work_mem_len);
extern UartDevice UartDev;
/**
* @}
*/
#ifdef __cplusplus
}
#endif