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Update README.md

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Grigori Goronzy 2016-04-02 23:13:51 +02:00
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README.md
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@ -49,6 +49,7 @@ Features
* Set device options * Set device options
* Read unique device ID (STC 10/11/12/15) * Read unique device ID (STC 10/11/12/15)
* Trim RC oscillator frequency (STC 15) * Trim RC oscillator frequency (STC 15)
* Automatic power-cycling with DTR toggle
Installation Installation
------------ ------------
@ -66,18 +67,21 @@ Usage
Call stcgal with ```-h``` for usage information. Call stcgal with ```-h``` for usage information.
``` ```
usage: stcgal.py [-h] [-P {stc89,stc12a,stc12,stc15a,stc15}] [-p PORT] usage: stcgal.py [-h] [-a] [-P {stc89,stc12a,stc12,stc15a,stc15}] [-p PORT]
[-b BAUD] [-l HANDSHAKE] [-o OPTION] [-t TRIM] [-D] [-b BAUD] [-l HANDSHAKE] [-o OPTION] [-t TRIM] [-D]
[code_binary] [eeprom_binary] [code_image] [eeprom_image]
stcgal 1.0 - an STC MCU ISP flash tool stcgal 1.0 - an STC MCU ISP flash tool
(C) 2014-2015 Grigori Goronzy
https://github.com/grigorig/stcgal
positional arguments: positional arguments:
code_binary code segment binary file to flash code_image code segment file to flash (BIN/HEX)
eeprom_binary eeprom segment binary file to flash eeprom_image eeprom segment file to flash (BIN/HEX)
optional arguments: optional arguments:
-h, --help show this help message and exit -h, --help show this help message and exit
-a, --autoreset cycle power automatically by asserting DTR
-P {stc89,stc12a,stc12,stc15a,stc15}, --protocol {stc89,stc12a,stc12,stc15a,stc15} -P {stc89,stc12a,stc12,stc15a,stc15}, --protocol {stc89,stc12a,stc12,stc15a,stc15}
protocol version protocol version
-p PORT, --port PORT serial port device -p PORT, --port PORT serial port device
@ -244,6 +248,16 @@ device options. Use the ```-t``` flag to request trimming to a certain
value. Generally, frequencies between 4 and 35 MHz can be achieved. If value. Generally, frequencies between 4 and 35 MHz can be achieved. If
trimming fails, stcgal will abort. trimming fails, stcgal will abort.
### Automatic power-cycling
STC's microcontrollers require a power-on reset to invoke the bootloader,
which can be inconvenient. stcgal can use the DTR control signal of a
serial interface to automate this. The DTR signal is asserted for
approximately 500 ms when the autoreset feature is enabled with the
```-a``` flag. This requires external circuitry to actually switch the
power. In some cases, when the microcontroller draws only little power,
it is possible to directly supply power from the DTR signal, however.
License License
------- -------