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 5th bit corresponds with IA0 Level of DIP switch, can be configured manually.

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

char rx_buffer[256];//Define a receive buffer to store the data received by UART2

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

*/

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

//iicSerial2.begin(/*baud = */115200, /*format = */IIC_SERIAL_8N1);

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

Serial.println("|

connected UART2's TX pin to RX pin.

|");

Serial.println("|

Analysis string and eliminate a char of a string.

|");

Serial.println("|

Original string: ABCDEFASFGHJUAAAEEB

|");

Serial.println("|

Eliminate char: A

|");

Serial.println("|

Original string: BCDEFSFGHJUEEB

|");

Serial.println("|

Print the parsed string.

|");

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

Serial.println("Please Send to the string by UART2's TX.");

Serial.println("UART2 send a string: ABCDEFASFGHJUAAAEEB");

iicSerial2.println("ABCDEFASFGHJUAAAEEB");//UART2 transmit string "ABCDEFASFGHJUAAAEEB"

}