# Tuyaos/sw I2c

> TuyaOS software (bit-bang) I2C built on tkl_gpio, from driver_gpio demo. 软件I2C、bit-bang、tdd_sw_i2c、GPIO模拟I2C。

- Skill: `tuya/tuyaos-sw-i2c` (Agent Skill)
- Install (CLI): `npx skillmds@latest add tuya/tuyaos-sw-i2c`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tuya/tuyaos-sw-i2c/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tuya (https://skillmd.com/u/tuya)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tuya/tuyaos-sw-i2c

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# TuyaOS Software I2C

**Demo:** `…/examples/driver_gpio/example_driver_sw_i2c.c` + `tdd_sw_i2c.c/.h`

## APIs

| Function | Role |
|----------|------|
| `tdd_sw_i2c_init(port, i2c_pin)` | bind SCL/SDA GPIOs |
| `tdd_sw_i2c_xfer(port, msg)` | transfer |
| `tdd_sw_i2c_deinit(port)` | release |

Uses `tkl_gpio_*` underneath. Copy the demo files into the app (or link sources
via `local.mk`) and set SCL/SDA pins for the board.

Prefer **hardware I2C** (`i2c/SKILL.md`) when the SoC port is free.