2023/10/12 10:51

Gravity: IIC to dual UART module Wiki - DFRobot

https://wiki.dfrobot.com/Gravity: IIC to Dual UART Module SKU: DFR0627

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*@n The 4th and 3rd bits are fixed, value 1 and 0 respectively

*@n The values of the 2nd and 1st bits are the sub UART channels, 00 for sub UART 1, 01 for sub UART 2.

*@n The 0 bit represents the operation object: 0 for register, 1 for FIFO cache.

*/

DFRobot_IICSerial iicSerial1(Wire, /*subUartChannel =*/SUBUART_CHANNEL_1,/*IA1 = */1,/*IA0 = */1);//Construct UART1

//DFRobot_IICSerial iicSerial1;//Default constructor, UART1, IA1 = 1, IA0 = 1

DFRobot_IICSerial iicSerial2(Wire, /*subUartChannel =*/SUBUART_CHANNEL_2, /*IA1 = */1,/*IA0 = */1);//Construct UART2

uint8_t flag = 0;//A flag bit, judge whether to print the prompt information of UART1 and UART2.

//if it is 0, print "UART1 receive data: " or "UART2 receive data: "

void setup() {

Serial.begin(115200);

/*begin Init function, set band rate according to the selected crystal frequency.

begin(long unsigned baud) Call the function, set sub UART band rate.

default setting->Band rate: baud, data format

：IIC_SERIAL_8N1, 8 bits data, no check mode, 1 bit stop bit.

begin(long unsigned baud, uint8_t format)Use the function to set band rate and data format:

Parameter supported baud:2400, 4800, 57600, 7200, 9600, 14400, 19200, 28800, 38400,

76800, 115200, 153600, 230400, 460800, 307200, 921600

Parameter available format:

IIC_SERIAL_8N1

IIC_SERIAL_8N2

IIC_SERIAL_8Z1

IIC_SERIAL_8Z2

IIC_SERIAL_8O1

IIC_SERIAL_8O2

IIC_SERIAL_8E1

IIC_SERIAL_8E2

IIC_SERIAL_8F1

IIC_SERIAL_8F2

8 represents the number of data bit, N for no parity, Z for 0 parity, O for Odd parity, E for Even parity,

F for 1 parity, 1 or 2 for the number of stop bit. Default IIC_SERIAL_8N1

*/

iicSerial1.begin(/*baud = */115200);/*UART1 init*/

//iicSerial1.begin(/*baud = */115200, /*format = */IIC_SERIAL_8N1);

iicSerial2.begin(/*baud = */115200);/*UART2 init*/

Serial.println("\n+--------------------------------------------+");

Serial.println("|

Connected UART1's TX pin to RX pin.

|");//Connect pin TX and RX of UART1

Serial.println("|

Connected UART2's TX pin to RX pin.

|");//Connect pin TX and RX of UART2

Serial.println("|

UART1 send a String: \"hello, Serial1!\"

|");//UART1 transmit a string "hello, Serial1!"

Serial.println("|

UART2 send a number: 123

|");//UART2 transmit numbers 123

Serial.println("+--------------------------------------------+");

iicSerial1.println("hello, Serial1!");//UART1 transmit string:"hello, Serial1!"

iicSerial2.write(123);//UART2 transmit:123

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