ESP32-C6
2023 Open source · CC0 On-board only Online
ESP32-C6 is Espressif's WiFi 6 + Bluetooth LE + 802.15.4 (Thread / Zigbee) microcontroller, emulated in the browser on a from-scratch RISC-V RV32IMAC interpreter (the RV32I base plus the M multiply/divide, A atomics and C compressed extensions, the machine-mode CSRs and the trap and interrupt machinery). The core is wired to an ESP32-C6 SoC model at the real hardware addresses: 512 KB unified HP SRAM, XIP flash, the GPIO block with the DevKitC-1 addressable WS2812 RGB LED on GPIO8, UART0, the systimer and a functional interrupt matrix. It runs REAL bare-metal firmware, including a WS2812 RGB cycle and an interactive UART REPL you can type into. Because the whole chip is ordinary JavaScript it plugs into the site's shared debugger: the real RISC-V disassembler, live x0-x31, pc and the machine CSRs, side-effect-free memory, single-instruction step, execution breakpoints and write-watchpoints. WiFi 6, BLE and 802.15.4 have no radio here and are HLE stubs, so the emulator is silent.
Runs on: Web browser
ESP32-C6 Online Emulator
Play ESP32-C6 using JavaScript directly in your browser.
Controls
Boots real firmware on a from-scratch RISC-V RV32IMAC interpreter (RV32I + M mul/div + A atomics + C compressed, the machine-mode CSRs, traps and a functional interrupt controller) wired to an ESP32-C6 SoC model at the real hardware addresses: the 512 KB HP SRAM (unified I/D bus at 0x40800000), XIP flash + the flash-cache MMU + SPI-flash controller, the GPIO block (0x60091000, with the on-board WS2812 RGB LED on GPIO8), UART0 and the USB-Serial-JTAG console, the systimer and the interrupt matrix (PLIC). The default is stock, unmodified MicroPython v1.24.1 (MIT): the emulator HLE-s the ESP32-C6 mask ROM (from public linker-script addresses) and boots the real ESP-IDF + FreeRTOS all the way to a live Python >>> REPL — it auto-runs print(2+2) -> 4 and 6*7 -> 42 the moment it comes up, and you can type more (integer/float math, or drive the on-board GPIO8 RGB LED); stdin is delivered through the USB-Serial-JTAG console so typing stays reliable. Also in the picker: an RGB cycle that bit-bangs the DevKitC-1 WS2812 RGB LED as a real 800 kHz one-wire waveform (decoded from the GPIO edge timing), a Rainbow hue wheel, an original CC0 bare-metal mini-REPL, and Hello UART. Open the debugger to single-step the RISC-V core, read/write x0-x31 + pc + the machine CSRs, disassemble HP SRAM and flash with the shared RISC-V decoder, set breakpoints and write-watchpoints over the real ESP32-C6 memory map. WiFi 6, BLE and 802.15.4 have no radio here: their register windows are HLE stubs so firmware that probes them keeps running.
Boots real firmware on a from-scratch RISC-V RV32IMAC interpreter (RV32I + M mul/div + A atomics + C compressed, the machine-mode CSRs, traps and a functional interrupt controller) wired to an ESP32-C6 SoC model at the real hardware addresses: the 512 KB HP SRAM (unified I/D bus at 0x40800000), XIP flash + the flash-cache MMU + SPI-flash controller, the GPIO block (0x60091000, with the on-board WS2812 RGB LED on GPIO8), UART0 and the USB-Serial-JTAG console, the systimer and the interrupt matrix (PLIC). The default is stock, unmodified MicroPython v1.24.1 (MIT): the emulator HLE-s the ESP32-C6 mask ROM (from public linker-script addresses) and boots the real ESP-IDF + FreeRTOS all the way to a live Python >>> REPL — it auto-runs print(2+2) -> 4 and 6*7 -> 42 the moment it comes up, and you can type more (integer/float math, or drive the on-board GPIO8 RGB LED); stdin is delivered through the USB-Serial-JTAG console so typing stays reliable. Also in the picker: an RGB cycle that bit-bangs the DevKitC-1 WS2812 RGB LED as a real 800 kHz one-wire waveform (decoded from the GPIO edge timing), a Rainbow hue wheel, an original CC0 bare-metal mini-REPL, and Hello UART. Open the debugger to single-step the RISC-V core, read/write x0-x31 + pc + the machine CSRs, disassemble HP SRAM and flash with the shared RISC-V decoder, set breakpoints and write-watchpoints over the real ESP32-C6 memory map. WiFi 6, BLE and 802.15.4 have no radio here: their register windows are HLE stubs so firmware that probes them keeps running.
Boots real firmware on a from-scratch RISC-V RV32IMAC interpreter (RV32I + M mul/div + A atomics + C compressed, the machine-mode CSRs, traps and a functional interrupt controller) wired to an ESP32-C6 SoC model at the real hardware addresses: the 512 KB HP SRAM (unified I/D bus at 0x40800000), XIP flash + the flash-cache MMU + SPI-flash controller, the GPIO block (0x60091000, with the on-board WS2812 RGB LED on GPIO8), UART0 and the USB-Serial-JTAG console, the systimer and the interrupt matrix (PLIC). The default is stock, unmodified MicroPython v1.24.1 (MIT): the emulator HLE-s the ESP32-C6 mask ROM (from public linker-script addresses) and boots the real ESP-IDF + FreeRTOS all the way to a live Python >>> REPL — it auto-runs print(2+2) -> 4 and 6*7 -> 42 the moment it comes up, and you can type more (integer/float math, or drive the on-board GPIO8 RGB LED); stdin is delivered through the USB-Serial-JTAG console so typing stays reliable. Also in the picker: an RGB cycle that bit-bangs the DevKitC-1 WS2812 RGB LED as a real 800 kHz one-wire waveform (decoded from the GPIO edge timing), a Rainbow hue wheel, an original CC0 bare-metal mini-REPL, and Hello UART. Open the debugger to single-step the RISC-V core, read/write x0-x31 + pc + the machine CSRs, disassemble HP SRAM and flash with the shared RISC-V decoder, set breakpoints and write-watchpoints over the real ESP32-C6 memory map. WiFi 6, BLE and 802.15.4 have no radio here: their register windows are HLE stubs so firmware that probes them keeps running.
Boots real firmware on a from-scratch RISC-V RV32IMAC interpreter (RV32I + M mul/div + A atomics + C compressed, the machine-mode CSRs, traps and a functional interrupt controller) wired to an ESP32-C6 SoC model at the real hardware addresses: the 512 KB HP SRAM (unified I/D bus at 0x40800000), XIP flash + the flash-cache MMU + SPI-flash controller, the GPIO block (0x60091000, with the on-board WS2812 RGB LED on GPIO8), UART0 and the USB-Serial-JTAG console, the systimer and the interrupt matrix (PLIC). The default is stock, unmodified MicroPython v1.24.1 (MIT): the emulator HLE-s the ESP32-C6 mask ROM (from public linker-script addresses) and boots the real ESP-IDF + FreeRTOS all the way to a live Python >>> REPL — it auto-runs print(2+2) -> 4 and 6*7 -> 42 the moment it comes up, and you can type more (integer/float math, or drive the on-board GPIO8 RGB LED); stdin is delivered through the USB-Serial-JTAG console so typing stays reliable. Also in the picker: an RGB cycle that bit-bangs the DevKitC-1 WS2812 RGB LED as a real 800 kHz one-wire waveform (decoded from the GPIO edge timing), a Rainbow hue wheel, an original CC0 bare-metal mini-REPL, and Hello UART. Open the debugger to single-step the RISC-V core, read/write x0-x31 + pc + the machine CSRs, disassemble HP SRAM and flash with the shared RISC-V decoder, set breakpoints and write-watchpoints over the real ESP32-C6 memory map. WiFi 6, BLE and 802.15.4 have no radio here: their register windows are HLE stubs so firmware that probes them keeps running.
Boots real firmware on a from-scratch RISC-V RV32IMAC interpreter (RV32I + M mul/div + A atomics + C compressed, the machine-mode CSRs, traps and a functional interrupt controller) wired to an ESP32-C6 SoC model at the real hardware addresses: the 512 KB HP SRAM (unified I/D bus at 0x40800000), XIP flash + the flash-cache MMU + SPI-flash controller, the GPIO block (0x60091000, with the on-board WS2812 RGB LED on GPIO8), UART0 and the USB-Serial-JTAG console, the systimer and the interrupt matrix (PLIC). The default is stock, unmodified MicroPython v1.24.1 (MIT): the emulator HLE-s the ESP32-C6 mask ROM (from public linker-script addresses) and boots the real ESP-IDF + FreeRTOS all the way to a live Python >>> REPL — it auto-runs print(2+2) -> 4 and 6*7 -> 42 the moment it comes up, and you can type more (integer/float math, or drive the on-board GPIO8 RGB LED); stdin is delivered through the USB-Serial-JTAG console so typing stays reliable. Also in the picker: an RGB cycle that bit-bangs the DevKitC-1 WS2812 RGB LED as a real 800 kHz one-wire waveform (decoded from the GPIO edge timing), a Rainbow hue wheel, an original CC0 bare-metal mini-REPL, and Hello UART. Open the debugger to single-step the RISC-V core, read/write x0-x31 + pc + the machine CSRs, disassemble HP SRAM and flash with the shared RISC-V decoder, set breakpoints and write-watchpoints over the real ESP32-C6 memory map. WiFi 6, BLE and 802.15.4 have no radio here: their register windows are HLE stubs so firmware that probes them keeps running.
Configurations
| Configuration | Emulator | Machine | OS | Legal | |
|---|---|---|---|---|---|
| MicroPython v1.24.1 | ESP32-C6 | ESP32-C6 | open | Open ⛶ | |
| RGB cycle (WS2812) | ESP32-C6 | ESP32-C6 | open | Open ⛶ | |
| Rainbow (WS2812 hue wheel) | ESP32-C6 | ESP32-C6 | open | Open ⛶ | |
| Mini-REPL (UART0) | ESP32-C6 | ESP32-C6 | open | Open ⛶ | |
| Hello UART (serial) | ESP32-C6 | ESP32-C6 | open | Open ⛶ |