How do I use esp32 as an external RAM for other microcontroller?
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How do I use esp32 as an external RAM for other microcontroller?
This might sounds quite stupid but I was wondering if esp32 can be used as an external RAM for other micro-controllers? Please, can someone shed some light on this topic, is there any way that I could achieve this? Thank you.
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Re: How do I use esp32 as an external RAM for other microcontroller?
That depends, what RAM interface does the other microcontroller have? In general, what are you trying to do, what problem are you trying to solve?
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Re: How do I use esp32 as an external RAM for other microcontroller?
Thank you @ESP_Sprite for your response, this is just a general question as a hobby project if this could be achieved. I'm thinking of using SPI if that is not possible could it be possible with FSMC of stm32f407?
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Re: How do I use esp32 as an external RAM for other microcontroller?
If you're thinking of using something with an SPI interface and code you can presumably control yourself, why not put a dedicated RAM chip (like an ESP-PSRAM64H or so) there instead of trying to abuse an ESP32?
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Re: How do I use esp32 as an external RAM for other microcontroller?
Yes, you're absolutely right but I want to use the wifi/ethernet/BlueTooth capability of esp32 too as a communication interface. If I could use it as an external RAM, it would be an icing on the cake. I just want to know if this could be achieved and to what extent. With this, I can extend the capability of our older boards we've without having to change the hardware design.
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Re: How do I use esp32 as an external RAM for other microcontroller?
Well, you have a whole heap of external interfaces (SDIO, UART, I2C, SPI, ...) you can use to communicate with the ESP32; as long as you write the software and the other side knows what protocol to speak, there's nothing stopping you from implementing a communication protocol that also allows you to save a few bytes on the ESP32.
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Re: How do I use esp32 as an external RAM for other microcontroller?
Thank your for your concern. I think I've to do some more digging myself then.
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