SD Loader

SD/Serial Loader

• Send/receive files to/from SD card from/to serial port
• Menu driven program

Features

• Supports SD cards up to 32GB
  • FAT32 formatted
• Serial interface
  • Full hardware Handshake support

Cards

• Constructed out of existing Land Boards cards
• NANO-BKOUT
• SD CARD X49
• MyMenu
  • MCP23008 I2C interface
  • OLED
  • 5 Pushbuttnns
  • 3 LEDs
• Level Shifter mounted on GRID49 card

NANO-BKOUT

SD CARD X49

MyMenu

Level Shifter (Optional)

• Convert 5V Arduino NANO Tx/Rx/RTS/CTS to 3.3V
• 4-channel I2C-safe Bi-directional Logic Level Converter

Cabling

NANO-BKOUT to Level Translator Cabling

NANO-BKOUT	SIGNAL	GRID49	COLOR
D0	RX (TO NANO)	G12	BRN
D1	TX (FROM NANO)	F12	ORA
D2	RTS FROM NANO)	E12	YEL
D3	CTS (TO NANO)	D12	WHT
+5V	+5V	C12	RED
GND	GND	H12	BLK

NANO-BKOUT to MyMenu Cabling

NANO-BKOUT	SIGNAL	MyMenu	COLOR
H7-1	GND	P2-1	BLK
H7-2	+5V	P2-2	RED
H7-3	SDA	P2-3	WHT
H7-4	SCL	P2-4	BRN
H7-5	INT(D6)	P2-5	GRY

NANO-BKOUT to SD_CARD_X49 Cabling

NANO-BKOUT	SIGNAL	SD_CARD_X49	COLOR
ISP-1	D12 / MISO	J1-2	BRN
ISP-2	+5V	J1-8	RED
ISP-3	D13 / SCK	J1-3	BLU
ISP-4	D11 / MOSI	J1-4	WHT
ISP-5	RST*	N/C	OR
ISP-6	GND	J1-1	BLK
D9	D9/ SDCS*	J1-5	GRY

Software

• Runs on Arduino Nano

Human Interface Design (HID)

• Menu driven
  • MyMenu card driver
• OLED display
  • ug2 u8x8 OLED display driver software

SD Card

• SD card driver software - Example code reads directory

 ** SCLK - CLK - pin 13
 ** MISO - SDI - pin 12
 ** MOSI - SDO - pin 11
 ** SS - CS - depends on your SD card shield or module.

Serial

• Serial Reference
• Serial.begin(speed)
• Serial.available()
  • Get the number of bytes (characters) available for reading from the serial port.
  • This is data that’s already arrived and stored in the serial receive buffer (which holds 64 bytes).
  • Turn off/on receive handshake based on Serial.available() count and storage

References

• XMODEM Protocol
• S record format