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Adding Pi pico support #25

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51a2f0a
Added Pi Pico implementation
thisismyrobot Jan 12, 2023
7bb2fd8
Update README.md
thisismyrobot Jan 12, 2023
e778c8c
Update README.md
thisismyrobot Jan 12, 2023
255823f
Update read.py
thisismyrobot Jan 12, 2023
c911cc6
Update write.py
thisismyrobot Jan 12, 2023
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21 changes: 11 additions & 10 deletions README.md
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Expand Up @@ -5,8 +5,9 @@ Basic class to access RFID readers of the type [MFRC522](http://www.nxp.com/docu
This is basically a re-write of [this](https://github.com/mxgxw/MFRC522-python) Python port for the MFRC522. I
tried to strip things down and make them more "pythonic" so the result is small enough to run on
[Micropython](https://github.com/micropython/micropython) boards. I tried the class so far on the
[ESP8266](https://github.com/micropython/micropython/tree/master/esp8266) and
the [WiPy](https://github.com/micropython/micropython/tree/master/cc3200).
[ESP8266](https://github.com/micropython/micropython/tree/master/ports/esp8266),
the [WiPy](https://github.com/micropython/micropython/tree/master/ports/cc3200)
and [Pi Pico](https://github.com/micropython/micropython/tree/master/ports/rp2).

## Usage

Expand All @@ -16,15 +17,15 @@ For the ESP8266 there are multiple solutions to do that. E.g. use the

I used the following pins for my setup:

| Signal | GPIO ESP8266 | GPIO WiPy | Note |
| --------- | ------------ | -------------- | ------------------------------------ |
| sck | 0 | "GP14" | |
| mosi | 2 | "GP16" | |
| miso | 4 | "GP15" | |
| rst | 5 | "GP22" | |
| cs | 14 | "GP14" |Labeled SDA on most RFID-RC522 boards |
| Signal | GPIO ESP8266 | GPIO WiPy | GPIO Pi Pico | Note |
| --------- | ------------ | -------------- | -------------- | ------------------------------------ |
| sck | 0 | "GP14" | 18 | |
| mosi | 2 | "GP16" | 19 | |
| miso | 4 | "GP15" | 16 | |
| rst | 5 | "GP22" | 20 | |
| cs | 14 | "GP17" | 17 | SDA on most RFID-RC522 boards |

Now enter the REPL you could run one of the two exmaples:
Now enter the REPL you could run one of the two examples:

For detecting, authenticating and reading from a card:

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6 changes: 4 additions & 2 deletions examples/read.py
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Expand Up @@ -4,10 +4,12 @@

def do_read():

if uname()[0] == 'WiPy':
if uname()[0] == 'WiPy' or board == 'LoPy' or board == 'FiPy':
rdr = mfrc522.MFRC522("GP14", "GP16", "GP15", "GP22", "GP17")
elif uname()[0] == 'esp8266':
rdr = mfrc522.MFRC522(0, 2, 4, 5, 14)
elif uname()[0] == 'rp2':
rdr = mfrc522.MFRC522(18, 19, 16, 20, 17)
else:
raise RuntimeError("Unsupported platform")

Expand Down Expand Up @@ -43,4 +45,4 @@ def do_read():
print("Failed to select tag")

except KeyboardInterrupt:
print("Bye")
print("Bye")
4 changes: 3 additions & 1 deletion examples/write.py
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Expand Up @@ -4,10 +4,12 @@

def do_write():

if uname()[0] == 'WiPy':
if uname()[0] == 'WiPy' or board == 'LoPy' or board == 'FiPy':
rdr = mfrc522.MFRC522("GP14", "GP16", "GP15", "GP22", "GP17")
elif uname()[0] == 'esp8266':
rdr = mfrc522.MFRC522(0, 2, 4, 5, 14)
elif uname()[0] == 'rp2':
rdr = mfrc522.MFRC522(18, 19, 16, 20, 17)
else:
raise RuntimeError("Unsupported platform")

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2 changes: 2 additions & 0 deletions mfrc522.py
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Expand Up @@ -32,6 +32,8 @@ def __init__(self, sck, mosi, miso, rst, cs):
elif board == 'esp8266':
self.spi = SPI(baudrate=100000, polarity=0, phase=0, sck=self.sck, mosi=self.mosi, miso=self.miso)
self.spi.init()
elif board == 'rp2':
self.spi = SPI(0, baudrate=100000, sck=self.sck, mosi=self.mosi, miso=self.miso)
else:
raise RuntimeError("Unsupported platform")

Expand Down