Error: Identifier "I2CSlave" is undefined in MAX32630FTHR

Mbed OS
1

Hi, I’m about to connect raspberry pi 4 as master and MAX32630FTHR as slave with I2C.
However, in MAX32630FTHR, it was outputted the message ; “Error: Identifier “I2CSlave” is undefined in “main.cpp”, Line: 14, Col: 2”.
I wrote definitely “#include “mbed.h””.
The photograph below is the error message.

スクリーンショット 2020-11-23 20.56.11
スクリーンショット 2020-11-23 20.56.111648×1306 276 KB

  • targets device : MAX32630FTHR (as slave)
  • version of Mbed OS : 5.11.5 (online compiler)

Do you know anything about it?

2

Hello,

how you can see below, this feature is not enabled for this target for some reason. That mean "I2CSalve" is missing under tag "device_has".

You can try to add that via the mbed_app.json via

{
    "target_overrides": {
        "*": {
            "target.device_has_add": ["I2CSlave"]
        }
    }
}

but if it is not supported/ implemented, that will not help you.

BR, Jan

1 Like
3

Thank you very much for kind reply.
I tried to add the mbeda_app.json that your advice.

スクリーンショット 2020-11-25 21.33.21
スクリーンショット 2020-11-25 21.33.212876×1562 388 KB

However, the same error occurs. Maybe it is unsupported by the online compiler I’m using?

4

I do not think that issue is in the context with the Online compiler.
A piece of code, what connect Mbed I2CSlave API with Maxim’s HAL drivers, is probably missing from Maxim’s side.

BR, Jan

5

Could it be that I have no choice but to give up…?

6
  • You can try to make your own implementation with HAL drivers, maybe somewhere exist an example.
  • Switch to another board
  • See if Arduino has support for your board and I2C slave

BR, Jan

7

Thank you very much for kind reply, BR, Jan.

I have tried to do based on your advice as slave as Arduino Nano Every and master as MAX32630FTHR. It’s i2c ommunication properly . However, Communication exceeding 128 bytes happened character corruption.
Below are the errors at that time. (Screen Commands)

128バイトを超えて通信できない
128バイトを超えて通信できない1787×408 91.2 KB

I want to communicate beyond 128 bytes, is there a better way?

main.cpp (MAX32630FTHR)

#include "mbed.h"
#include "max32630fthr.h"
#include <stdio.h>

#define SDA P5_7
#define SCL P6_0

MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
I2C i2c(SDA, SCL);

int main()
{
    printf("---------------------------------------------------\r\n");
    int ArduinoAddress7bit = 0x08; //arduinoIDE内のarudinoのアドレス
    int ArduinoAddress8bit = ArduinoAddress7bit << 1; // ArduinoAddress7bit * 2 mbed内のarduinoのアドレス
    printf("ArduinoAddress8bit : %d\r\n", ArduinoAddress8bit); // 0x08なら16
    int val;
    int key;

    printf("I2CProgramm Start\r\n");
    
    char buff[256];
    while(1) {
        key = getchar();
        printf("input key：%c\r\n", key);
        i2c.read(ArduinoAddress8bit,buff,sizeof(buff));  
        //printf("%d, ",buff[0]);
        //printf("%d \r\n",buff[1]);
        printf("%d \r\n", sizeof(buff));
        printf("%s \r\n", buff);
        wait(1);
    }
}

I2C_Slave.ino (Arduino Nano Every)

//SDA = A4
//SCL = A5
#include <Arduino.h>
#include <Wire.h>
#define THIS_ADDRESS 0x08
static byte sendmsg[] = "{'id': '01', 'class': 'human_front', 'avg_num': 2.2, 'date': '1605364660851.57', 'temperature_min': 14.87, 'temperature_max': 32.42}";
static int sendmsgsize = 0;

void setup() {
  Wire.begin(THIS_ADDRESS);
  pinMode(A4, INPUT); // disable pullup
  pinMode(A5, INPUT); // disable pullup
  Wire.onRequest(requestEvent);
  Serial.begin(9600);
  Serial.println("STARTUP -- OK!");
}

void loop() {
  // delay(1000);
}

void requestEvent() {
  sendmsgsize = sizeof(sendmsg);
  Serial.print("sendmsgsize : ");
  Serial.println(sendmsgsize); 
  for(int i = 0; i < sizeof(sendmsg); i++){
    Wire.write(sendmsg[i]);
  }
}