/* * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #ifndef _ROM_UART_H_ #define _ROM_UART_H_ #include "esp_types.h" #include "esp_attr.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 all chars from receive buffer. * Please do not call this function in SDK. * * @param uint8_t *pCmdLn : the pointer to store the string. * * @return OK for successful. * FAIL for failed. */ ETS_STATUS UartGetCmdLn(uint8_t *pCmdLn); /** * @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); extern UartDevice UartDev; /** * @} */ #ifdef __cplusplus } #endif #endif /* _ROM_UART_H_ */