ESP8266 datasheet(88/117 Pages) ESPRESSIF

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11. UART Introduction

Interface: void UART_SetBaudrate (uint8 uart_no,uint32 baud_rate);

11.3.2. Parity Bit

#deﬁne UART_PARITY_EN (BIT(1)) Enable check: 1: enable; 0: disable

#deﬁne UART_PARITY

(BIT(0)) Check type setting 1: Odd parity; 0: Even parity

Interface: void UART_SetParity(uint8 uart_no, UartParityMode

Parity_mode);

11.3.3. Data Bit

#deﬁne UART_BIT_NUM 0x00000003 //Length of data bit occupies two bit:

Setting these two bit can conﬁgure data length 0: 5bit ; 1: 6bit ; 2: 7bit ; 3: 8bit

#deﬁne UART_BIT_NUM_S 2 //Offset register is 2 (2 bit start)

Interface: void UART_SetWordLength(uint8 uart_no, UartBitsNum4Char

len)

11.3.4. Stop Bit

#deﬁne UART_STOP_BIT_NUM 0x00000003 //The length of data bit occupies two bit:

Conﬁgure the length of stop bits through setting these two bit can 1 : 1 bit ; 2 : 1.5 bit ; 3

: 2 bit

#deﬁne UART_STOP_BIT_NUM_S 4 //Register offset is 4 (start from 4th bit)

Interface: void UART_SetStopBits(uint8 uart_no, UartStopBitsNum

bit_num);

11.3.5. Inverting

Each input and output UART signals can reverse conﬁguration internal.

#deﬁne UART_DTR_INV (BIT(24))

#deﬁne UART_RTS_INV (BIT(23))

#deﬁne UART_TXD_INV (BIT(22))

#deﬁne UART_DSR_INV (BIT(21))

#deﬁne UART_CTS_INV (BIT(20))

#deﬁne UART_RXD_INV (BIT(19))

Set the corresponding register,you can reverse the corresponding signal line input / output.

Interface: void UART_SetLineInverse

(uint8 uart_no, UART_LineLevelInverse inverse_mask);

Espressif

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2017.05

ESP8266 Datasheet(PDF) 88 Page - ESPRESSIF SYSTEMS (SHANGHAI) CO., LTD.