Implement AES-CTR on top of AES-ECB I using a microcontroller which only support AES-ECB encryption i.e. no decryption-mode, CBC, GCM or similar modes.

However, I'm wondering if it's possible to implement AES-CTR or similar on top of AES-ECB?

I'm grateful for help, tips, similar implementations etc.

Cheers
Yes, you can do this.  In fact, implementing other cipher modes is precisely what ECB mode is good for (and, indeed, just about all it is good for).

To implement AES-CTR, simply fill an array of 128-bit blocks with increasing counter values, encrypt it with AES-ECB and XOR the resulting keystream with the plaintext (for encryption) or ciphertext (for decryption).