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Fix instructions for merging bin / qemu #157

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Apr 30, 2024
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Fix instructions for merging bin / qemu #157

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4 changes: 2 additions & 2 deletions src/tooling/simulating/qemu.md
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Expand Up @@ -23,13 +23,13 @@ If you prefer to use [`espflash`][espflash], you can achieve the same result by

```shell
cargo build --release
espflash save-image --chip ESP32 --merge target/xtensa-esp32-espidf/release/<NAME> <OUTFILE>
espflash save-image --chip esp32 --merge target/xtensa-esp32-espidf/release/<NAME> <OUTFILE>
```

Now, run the image in QEMU:

```shell
/path/to/qemu-system-xtensa -nographic -machine esp32 -drive file=<OUTFILE>,if=mtd,format=raw
/path/to/qemu-system-xtensa -nographic -machine esp32 -drive file=<OUTFILE>,if=mtd,format=raw -m 4M
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What does the -m 4M argument does? Flash size?

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It allows using external PSRAM in the firmware. See https://github.com/espressif/esp-toolchain-docs/blob/main/qemu/esp32/README.md#adding-psram

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Is that something that we would like to have included in the command that we showcase? We already have a link to the esp-toolchain-docs also, so user can check it and see the available args.

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I thought think it's very common to use external RAM, this makes it easier to get started.

```

[cargo-espflash]: https://github.com/esp-rs/espflash/tree/main/cargo-espflash
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