132 lines
3.8 KiB
Markdown
132 lines
3.8 KiB
Markdown
# HannaBox
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## Microcontroller
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D1 Mini ESP32
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Due to mp3 playback it needs a multicore esp 32:
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This library only works on multi-core ESP32 chips like the ESP32-S3. It does not work on the ESP32-S2 or the ESP32-C3 warning
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## Pins
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### Amplifier
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```
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26 -> DIN
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27 -> BCLK
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25 -> LRC
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5V -> Vin
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GND -> GND
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```
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### SD Card
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```
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CS -> 22 (D1)
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MOSI -> 23 (D7)
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CLK -> 18 (D5)
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MISO -> 19 (D6)
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```
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### RFID Reader
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```
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SOA -> 32
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SCK -> 18
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MOSI -> 23
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MISO -> 19
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IRQ -> NC
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GND -> GND
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RST -> 33
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3.3V -> 3.3V
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```
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#### Registers
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```
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Writing 0x7F to the "ComIEnReg" means the following:
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Bit 7: IRqInv=0 - Interrupts are active high
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Bit 6: TxIEn=1 - Transmitter interrupt is enabled
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Bit 5: RxIEn=1 - Receive interrupt is enabled
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Bit 4: IdleIEn=1 - Idle interrupt is enabled
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Bit 3: HiAlertIEn=1 - "High Alert" interrupt is enabled
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Bit 2: LoAlertIEn=1 - "Low Alert" interrupt is enabled
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Bit 1: ErrIEn=1 - Error interrupt is enabled
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Bit 0: TimerIEn=1 - Timer interrupt is enabled
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The bits in the register "ComIrqReg" have the following meaning:
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Bit 7: Set1 - when written as 1, a bit value of 1 in bits 6-0 of the byte written set the corresponding register bit; when written as 0, bits 6-0 clear the corresponding register bit
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Bit 6: TxIRq - Set when the last bit of Tx data has been sent
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Bit 5: RxIRq - Set when the receiver detects the end of a valid data stream
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Bit 4: IdleIRq - Set when the CommandReg changes the command field to the idle command
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Bit 3: HiAlertIRq - Set when the Status1 register HiAlert bit is set
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Bit 2: LoAlertIRq - Set when the Status1 register LoAlert bit is set
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Bit 1: ErrIRq - Set when any bit in ErrorReg gets set
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Bit 0: TimerIRq - Set when the TCounterValReg decrements to zero
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Writing 0x14 to the "DivIEnReg" has the following meaning:
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Bit 7: IRQPushPull=0 - IRQ is an open-drain output pin
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Bit 6: reserved=0 - no known effect
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Bit 5: reserved=0 - effect unknown
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Bit 4: MfinActEn=1 - Allow the MFIN active interrupt request to trigger IRQ
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Bit 3: reserved=0 - boundedly undefined
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Bit 2: CRCIEn=1 - Permit the "DivIrqReg" bit CRCIRq to trigger IRQ
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Bit 1: reserved=0 - do not set to 1 on pain of nothing
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Bit 0: reserved=0 - has no purpose other than to confuse
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The register "DivIrqReg" corresponds to "DivIrqEn", and has the following bit definitions:
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Bit 7: Set2 - when written as 1, a bit value of 1 in bits 6-0 of the byte written set the corresponding register bit; when written as 0, bits 6-0 clear the corresponding register bit
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Bit 6: reserved - don't ask
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Bit 5: reserved - don't tell
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Bit 4: MfinActIRq - MFIN is active
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Bit 3: reserved - just leave it at zero and back away slowly
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Bit 2: CRCIRq - when 1, the CalcCRC command is active and all data is processed
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Bit 1: reserved - nothing to see here
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Bit 0: reserved - are you feeling lucky, punk?
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```
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Interrupt method was not working because it seems reading a card does not trigger one.
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See https://arduino.stackexchange.com/a/76285 and https://github.com/miguelbalboa/rfid/blob/master/examples/MinimalInterrupt/MinimalInterrupt.ino
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## Buttons
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```
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Start / Stop -> 17 and GND
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Wake up / Next -> 04 and GND
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Previous -> 16 and GND
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```
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## System sounds
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Place these sounds in the folder `system` on the SD card:
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* sleep.mp3
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* start.mp3
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sleep.mp3 will be played just before the timed shutdown, start.mp3 will be played if the box started and initialized successfully.
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## TODOs
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* Card Reader with SPI. Configure hspi, second SPI channel? Or does SD Card + RFID run at the same channel?
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## Schematic without modules
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### Charging circuit
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https://ww1.microchip.com/downloads/en/AppNotes/01149c.pdf
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MCP73837 ?
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## Links
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https://github.com/earlephilhower/ESP8266Audio
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[Running two SPI devices at once](https://randomnerdtutorials.com/esp32-spi-communication-arduino/)
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