daplink_flash: Add usage examples for write, read and info.

Author: nedseb

lib/daplink_flash/examples/flash_info.py

@@ -0,0 +1,16 @@
+"""Display DAPLink Flash bridge status and filename."""
+
+from machine import I2C
+from daplink_flash import DaplinkFlash
+
+i2c = I2C(1)
+flash = DaplinkFlash(i2c)
+
+print("=== DAPLink Flash Info ===")
+print("WHO_AM_I: 0x{:02X}".format(flash.device_id()))
+print("STATUS:   0x{:02X}".format(flash._status()))
+print("ERROR:    0x{:02X}".format(flash._error()))
+print("Busy:    ", flash.busy())
+
+name, ext = flash.get_filename()
+print("Filename: {}.{}".format(name, ext))

lib/daplink_flash/examples/read_file.py

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+"""Read and display the current file stored on flash."""
+
+from machine import I2C
+from daplink_flash import DaplinkFlash
+
+i2c = I2C(1)
+flash = DaplinkFlash(i2c)
+
+name, ext = flash.get_filename()
+print("Reading file: {}.{}".format(name, ext))
+print()
+
+content = flash.read()
+if len(content) == 0:
+    print("(empty)")
+else:
+    print(content.decode())
+    print("---")
+    print("{} bytes".format(len(content)))

lib/daplink_flash/examples/write_csv.py

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+"""Write CSV data to flash via DAPLink bridge."""
+
+from machine import I2C
+from time import sleep_ms
+from daplink_flash import DaplinkFlash
+
+i2c = I2C(1)
+flash = DaplinkFlash(i2c)
+
+print("WHO_AM_I:", hex(flash.device_id()))
+
+# Set filename and erase
+flash.set_filename("DATA", "CSV")
+flash.clear_flash()
+sleep_ms(500)
+print("Flash erased.")
+
+# Write CSV header + data
+flash.write_line("temperature;humidity;pressure")
+flash.write_line("25.3;48.2;1013.5")
+flash.write_line("25.5;47.8;1013.4")
+flash.write_line("25.4;48.0;1013.6")
+print("Data written.")
+
+# Read back
+content = flash.read()
+print("File content:")
+print(content.decode())