Calliope mini

Runs real bare-metal Calliope mini programs on an in-browser Nordic nRF51822 (ARM Cortex-M0) — the German education board that is a close cousin of the BBC micro:bit v1. The default "Matrix Animation" pulses a heart on the real 5x5 LED matrix (decoded from the actual 3x9 GPIO multiplex, wired exactly like the micro:bit v1). "RGB Colour Cycle" walks the hue on the on-board WS2812 RGB LED (P0.18), which the board decodes from the real bit-banged one-wire waveform. "Buzzer Melody" plays "Alle meine Entchen" on the on-board loudspeaker — the Calliope's headline over the micro:bit v1: it makes real SOUND. The tone is produced the real nRF51 way (TIMER2 drives a GPIOTE toggle task on the speaker pin through a PPI channel); click the Sound button to unmute. "Buttons" shows a face and chirps the speaker on A (P0.17) / B (P0.16). ALL on-screen controls — A/B buttons, the tilt D-pad and Shake/Flat — live in the shared debugger's Controller input panel. Keyboard: A/B = buttons, arrows = tilt, S = shake; click the display first so it captures the keyboard. Open the debugger, or add ?debug, to single-STEP real Thumb instructions, set PC breakpoints and write watchpoints, and read the ARM registers (r0-r15, xPSR, N/Z/C/V) and the real nRF51 memory map live.

Runs real bare-metal Calliope mini programs on an in-browser Nordic nRF51822 (ARM Cortex-M0) — the German education board that is a close cousin of the BBC micro:bit v1. The default "Matrix Animation" pulses a heart on the real 5x5 LED matrix (decoded from the actual 3x9 GPIO multiplex, wired exactly like the micro:bit v1). "RGB Colour Cycle" walks the hue on the on-board WS2812 RGB LED (P0.18), which the board decodes from the real bit-banged one-wire waveform. "Buzzer Melody" plays "Alle meine Entchen" on the on-board loudspeaker — the Calliope's headline over the micro:bit v1: it makes real SOUND. The tone is produced the real nRF51 way (TIMER2 drives a GPIOTE toggle task on the speaker pin through a PPI channel); click the Sound button to unmute. "Buttons" shows a face and chirps the speaker on A (P0.17) / B (P0.16). ALL on-screen controls — A/B buttons, the tilt D-pad and Shake/Flat — live in the shared debugger's Controller input panel. Keyboard: A/B = buttons, arrows = tilt, S = shake; click the display first so it captures the keyboard. Open the debugger, or add ?debug, to single-STEP real Thumb instructions, set PC breakpoints and write watchpoints, and read the ARM registers (r0-r15, xPSR, N/Z/C/V) and the real nRF51 memory map live.

Runs real bare-metal Calliope mini programs on an in-browser Nordic nRF51822 (ARM Cortex-M0) — the German education board that is a close cousin of the BBC micro:bit v1. The default "Matrix Animation" pulses a heart on the real 5x5 LED matrix (decoded from the actual 3x9 GPIO multiplex, wired exactly like the micro:bit v1). "RGB Colour Cycle" walks the hue on the on-board WS2812 RGB LED (P0.18), which the board decodes from the real bit-banged one-wire waveform. "Buzzer Melody" plays "Alle meine Entchen" on the on-board loudspeaker — the Calliope's headline over the micro:bit v1: it makes real SOUND. The tone is produced the real nRF51 way (TIMER2 drives a GPIOTE toggle task on the speaker pin through a PPI channel); click the Sound button to unmute. "Buttons" shows a face and chirps the speaker on A (P0.17) / B (P0.16). ALL on-screen controls — A/B buttons, the tilt D-pad and Shake/Flat — live in the shared debugger's Controller input panel. Keyboard: A/B = buttons, arrows = tilt, S = shake; click the display first so it captures the keyboard. Open the debugger, or add ?debug, to single-STEP real Thumb instructions, set PC breakpoints and write watchpoints, and read the ARM registers (r0-r15, xPSR, N/Z/C/V) and the real nRF51 memory map live.

Runs real bare-metal Calliope mini programs on an in-browser Nordic nRF51822 (ARM Cortex-M0) — the German education board that is a close cousin of the BBC micro:bit v1. The default "Matrix Animation" pulses a heart on the real 5x5 LED matrix (decoded from the actual 3x9 GPIO multiplex, wired exactly like the micro:bit v1). "RGB Colour Cycle" walks the hue on the on-board WS2812 RGB LED (P0.18), which the board decodes from the real bit-banged one-wire waveform. "Buzzer Melody" plays "Alle meine Entchen" on the on-board loudspeaker — the Calliope's headline over the micro:bit v1: it makes real SOUND. The tone is produced the real nRF51 way (TIMER2 drives a GPIOTE toggle task on the speaker pin through a PPI channel); click the Sound button to unmute. "Buttons" shows a face and chirps the speaker on A (P0.17) / B (P0.16). ALL on-screen controls — A/B buttons, the tilt D-pad and Shake/Flat — live in the shared debugger's Controller input panel. Keyboard: A/B = buttons, arrows = tilt, S = shake; click the display first so it captures the keyboard. Open the debugger, or add ?debug, to single-STEP real Thumb instructions, set PC breakpoints and write watchpoints, and read the ARM registers (r0-r15, xPSR, N/Z/C/V) and the real nRF51 memory map live.

Runs real bare-metal Calliope mini programs on an in-browser Nordic nRF51822 (ARM Cortex-M0) — the German education board that is a close cousin of the BBC micro:bit v1. The default "Matrix Animation" pulses a heart on the real 5x5 LED matrix (decoded from the actual 3x9 GPIO multiplex, wired exactly like the micro:bit v1). "RGB Colour Cycle" walks the hue on the on-board WS2812 RGB LED (P0.18), which the board decodes from the real bit-banged one-wire waveform. "Buzzer Melody" plays "Alle meine Entchen" on the on-board loudspeaker — the Calliope's headline over the micro:bit v1: it makes real SOUND. The tone is produced the real nRF51 way (TIMER2 drives a GPIOTE toggle task on the speaker pin through a PPI channel); click the Sound button to unmute. "Buttons" shows a face and chirps the speaker on A (P0.17) / B (P0.16). ALL on-screen controls — A/B buttons, the tilt D-pad and Shake/Flat — live in the shared debugger's Controller input panel. Keyboard: A/B = buttons, arrows = tilt, S = shake; click the display first so it captures the keyboard. Open the debugger, or add ?debug, to single-STEP real Thumb instructions, set PC breakpoints and write watchpoints, and read the ARM registers (r0-r15, xPSR, N/Z/C/V) and the real nRF51 memory map live.