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Eval » Historie » Version 8

Maximilian Seesslen, 07.10.2024 16:27

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h1. Eval
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Relatively big MCU; Standard periphery can be tested within a single bringup run. Protocol can be added to biwak/arena release.
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Current use-case:
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* I2C has an issue that some times the board has to wait at bootup quite long time till i2c eeprom is functional.
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* SPI has an issue that some times the board has to wait at bootup quite long time till spi flash is functional.
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* Code cleanup; does the code still work; e.g. Timers. Complete disfunctionality would not be seen some times.
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* Want to develop something with nice debug output. Bootloader was a little bit nasty.
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No further use?
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* Alarm clock
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* CANBuzzer
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* Reference RTC clock
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** CANSwitches have PWM output but no RTC. For light switches this compination makes sense. CANDis could do this. At least in combination with buzzers nice.
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STM32L433CCU6; 48pins; 256KB Flash;  "DS":https://www.st.com/resource/en/datasheet/stm32l433cc.pdf
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* CAN
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* USB
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* Uart
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* SPI-Flash
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* I2C-EEPROM; 80Bytes + ?KB
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* I2C-Connector
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* Buzzer
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* LEDs
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* Small LCD? waste of pins?
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* RTC
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* PWM-LED; Golden Dragon?
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* ADC (fixed resistors; 1/4 VDD)
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* Button
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PA11 - CAN1_RX USB_DM
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PA12 - CAN1_TX USB_DP
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PB8 - CAN1_RX
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PB9 - CAN1_TX
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Power-Cut would be a killer feature. But without companion? 
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Einfach "nur" einen CAN-bus stromfrei schalten.
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Einzelnes Target antwortet dann "Gut" oder "Schlecht" und Parameter. Normale Applikation kann weiter laufen mit kleiner Erweiterung.
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Evtl. sogar einfacher als das total isolierte Geraet am PC.
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UART umschaltbar, naja, eher verwirrend. Noch eher multiplexen.