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projects:winklepicker [2017/02/18 00:43] – [Operation] darron | projects:winklepicker [2019/09/09 16:16] (current) – [Operation] darron | ||
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- | Winklepicker Reset Controller is a serial reset controller | + | Winklepicker Reset Controller is a RS232 BREAK detector using either a PIC12F1501 or PIC12F1571 microcontroller. |
+ | |||
+ | It has been designed specifically | ||
=== Licence === | === Licence === | ||
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This is used to enter the boot loader on the target, for firmware maintenance tasks. | This is used to enter the boot loader on the target, for firmware maintenance tasks. | ||
- | Two modes of operation are available with Winklepicker. The mode is selected using a pin on the controller which is inspected | + | Two modes of operation are available with Winklepicker. The mode is selected using a pin on the controller which is inspected |
==Mode 1== | ==Mode 1== | ||
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The target device is reset after a BREAK condition is sent from the host with a duration of ~50ms. The target is taken out of reset when the BREAK condition ends. | The target device is reset after a BREAK condition is sent from the host with a duration of ~50ms. The target is taken out of reset when the BREAK condition ends. | ||
- | This mode works with a large variety of UART devices which may only have Tx/Rx connections, | + | This mode works with a large variety of UART devices which may only have Tx/Rx connections, |
==Mode 2== | ==Mode 2== | ||
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Routing is enabled when RTS is low during a BREAK condition and disabled when RTS is high during a BREAK condition. | Routing is enabled when RTS is low during a BREAK condition and disabled when RTS is high during a BREAK condition. | ||
- | This mode can be used to simply reset the device or allow fine grained control of the reset pin for ICSP. | + | This mode can be used to simply reset the device or allow fine grained control of the reset pin for ICSP. It has also been designed to allow RTS to perform regular serial duties when not routed through to the target reset pin. |
=== Demonstration === | === Demonstration === |