Connecting an external UART device to the HiFive1 kit

HiFive1 Rev B
1

Hey,

I’m trying to connect a UART device (camera) to my HiFive1 kit using the arduino IDE, with the pins 0 (RX) and 1 (TX) on the hifive1 kit. The arduino code I’m running is as follows:

void setup() 
  {
   // put your setup code here, to run once:
   Serial.begin(115200);
   Serial1.begin(115200);

}

void loop(){ }

However, I get the following error message when I try to implement it:

Arduino: 1.8.1 (Linux), Board: “HiFive 1, Default, 16 MHz XTAL”
/home/niramay/Desktop/sketch_apr25b/sketch_apr25b.ino: In function ‘void setup()’:
sketch_apr25b:4: error: ‘Serial1’ was not declared in this scope
Serial1.begin(115200);
^~~~~~~
exit status 1
‘Serial1’ was not declared in this scope

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.

Apparently, I can’t use “Serial1” to interface with the UART on pins 0 and 1. I thought that option would be present in this device, but it apparently isn’t. Any thoughts on why this is happening? Any solutions?

2

You can use “Serial” to interface with the GPIO pins 0 and 1. There is only one serial device exported on the HiFive1, and it goes to both the USB for serial communication and to pins 0 and 1 for general UART use.