Temperature Logger with ATtiny817 and SD Card AN2543

1 Relevant Devices

1.1 tinyAVR 0-series

1.2 tinyAVR 1-series

1.3 megaAVR® 0-series

2 TWI for Temperature Sensor Interfacing

2.1 Floating Point Values with vfprintf for AVR

2.2 Buffer Construction

3 Using the RTC for Real Time Tracking

3.1 Predefined Macros for Time Initialization

3.2 RTC for Timestamping of Temperature Measurements

4 Petit FAT File System

4.1 Petit FatFs Limitations

4.2 SPI for SD Card Interfacing

4.3 Preparing an SD Card for use with Petit FatFs

4.4 SD Card Disk I/O Layer for AVR

5 Required Hardware

5.1 Changing Operating Voltage on the ATtiny817 Xplained Mini

5.2 Mounting the I/O1 Xplained Pro Extension Kit onto the ATtiny817 Xplained Mini

6 Get Source Code from Atmel | START

6.1 Configuration of Accompanying Code

6.2 Example Output

7 Revision History

The Microchip Web Site

Customer Change Notification Service

Customer Support

Microchip Devices Code Protection Feature

Quality Management System Certified by DNV

Worldwide Sales and Service