I2C

1. No Communication (ACK Not Received) Q: My device doesn’t respond to addresses. A: Verify I2C_Init() was called first Check pull-up resistors (4.7kΩ on SDA/SCL) Confirm slave address matches datasheet (7-bit vs 8-bit) Use logic analyzer to check signal integrity 2. Signal Glitches Q: Random NACKs or corrupted data. A: Add small delays (_nop_()) between SCL/SDA transitions Ensure power supply is stable (>100mA for bus) Keep I2C traces short (<30cm) 3. Clock Stretching Issues Q: Master hangs waiting for slave. […]