An all-too-common mistake made by people doing this kind of project is to try to implement both ends of the link at once; eg,
An advantage of using an existing, standard protocol is that there is likely to be ready-made test utilities available.
If you invent your own protocol, then you are stuck with having to do both ends of the link!
In this case, I would strongly suggest that your protocol be something that can be tested & debugged using a terminal.
On debugging serial comms:
Thanks for the reply. I asked it a bit vaguely because the topic is a bit of a combination between STM32, Simulink, and Arduino IDE. And I wasn't sure where to ask exactly.
I am trying to control or for now send data/value from one STM32-L476RG board with another using UART/USART. I have attached the Rx pin of the "master" to the Tx of the "slave" and vice versa. The "master" board will be controlled from Simulink similar to this first model of this example. While the "slave" board will be flashed from Arduino IDE, because of compatibility issues with another library that will be added if this is a success. I tried running the code below, but there seems to be no data received by the "slave" board, which I checked through the serial monitor of Arduino IDE. If you have any suggestions on how to fix this, I would greatly appreciate it. Thanks.
typedef union{
uint16_t number;
uint8_t bytes[2];
} INTUNION_t;
INTUNION_t myValue_int;
void setup() {
Serial.begin(115200);
}
void loop(){
if(Serial.available()){
myValue_int.number = getINT();
int a = myValue_int.bytes[0] | myValue_int.bytes[1] << 8;
Serial.println();
}
else {
Serial.print("No data received\n");
}
}
uint16_t getINT(){
int cont = 0;
INTUNION_t i;
while (cont < 2 ){
i.bytes[cont] = Serial.read();
cont = cont +1;
}
return i.number;
}