| United States Patent |
6,895,347 |
| Dorny , et al. |
May 17, 2005 |
Computerized methods for data loggers
Abstract
The present invention provides methods for operating data loggers and in particular, software techniques useful for controlling the critical functions of a low-power-battery-operated data logger. One method initializes various memory locations upon a detection of new firmware. Another method allows a processor system belonging to a data logger to receive a high baud rate data stream while being operated in a sleep mode. Yet another method provides a highly efficient process for estimating the remaining battery capacity of a data logger's primary power source. Finally, a method is provided for protecting volatile variables during a disruption of primary power. The protected variables are written to non-volatile memory using parasitic power only.
| Inventors: |
Dorny; Jonathan (Lumberton, NC); George; Robert (Wilmington, NC) |
| Assignee: |
Remote Data Systems, Inc. (Whiteville, NC) |
| Appl. No.: |
271914 |
| Filed: |
October 15, 2002 |
| Current U.S. Class: |
702⁄63 |
| Intern'l Class: |
G06F 019⁄⁄00 |
| Field of Search: |
702⁄63 713⁄2 714⁄15 701⁄48,50,45 340⁄573,902,436,945,5,467 700⁄3 382⁄118 280⁄735 200⁄61 600⁄544 705⁄14 709⁄224 370⁄216,936 |