Lab 6 Tasks

Requested Functions

• int audio_map_buffer(void)
• int audio_fill_square_wave(uint32_t hz, uint32_t ms)
• int audio_play(size_t byte_count)
• int audio_stop(void)

Guided Gaps

• Reject zero frequency or duration.
• Compute samples per half-period.
• Pick amplitude without clipping.
• Keep byte count and sample count separate.
• Make audio_stop safe when nothing is playing.

IMPORTANT

Do not write past the mapped audio buffer. Duration, sample rate, channels, and bytes per sample must agree before writing.

Common Mistakes

• Using frequency where period is required.
• Treating milliseconds as samples.
• Writing one channel when stereo is expected.
• Starting playback before filling the buffer.

Next: checks and references.