Refactor: add [[Category:Projects
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Add a lead sentence |
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| （未顯示同一使用者於中間所作的 1次修訂） | |||
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Adding a '''DS1302''' real-time clock module to a Raspberry Pi so it keeps time without a network connection. | |||
[[File:Rpi rtc.jpg|border|400px]] | [[File:Rpi rtc.jpg|border|400px]] | ||
== Hardware == | == Hardware == | ||
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* In version 2 Pi GPIO27 is in place of GPIO21 (same pin) | * In version 2 Pi GPIO27 is in place of GPIO21 (same pin) | ||
== Software == | == Software == | ||
* [http://www.hobbytronics.co.uk/download/rtc-pi.zip | * [http://www.hobbytronics.co.uk/download/rtc-pi.zip Real Time Clock Source Code] | ||
<pre> | <pre> | ||
Modify the following GPIO definition for RPi 2 | Modify the following GPIO definition for RPi 2 | ||
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== Reference == | == Reference == | ||
* [http://www.hobbytronics.co.uk/raspberry-pi-real-time-clock | * [http://www.hobbytronics.co.uk/raspberry-pi-real-time-clock Raspberry Pi Real Time Clock] | ||
[[Category:Projects]] | [[Category:Projects]] | ||
2026年8月23日 (日) 17:56的最新修訂
Adding a DS1302 real-time clock module to a Raspberry Pi so it keeps time without a network connection.
Hardware
- In version 2 Pi GPIO27 is in place of GPIO21 (same pin)
Software
Modify the following GPIO definition for RPi 2 #define GPIO_ADD 0x20200000L -> #define GPIO_ADD 0x3F000000L #define SCLK_OUTPUT *(gpio+GPIO_SEL2) &= 0xFFFFFFC7L -> #define SCLK_OUTPUT *(gpio+GPIO_SEL2) &= 0xFF1FFFFFL #define SCLK_HIGH *(gpio+GPIO_SET) = 0x00200000L -> #define SCLK_HIGH *(gpio+GPIO_SET) = 0x08000000L #define SCLK_LOW *(gpio+GPIO_CLR) = 0x00200000L -> #define SCLK_LOW *(gpio+GPIO_CLR) = 0x08000000L