Reference

• ​https://www.st.com/en/ecosystems/x-nucleo-led16a1.html

2023-04-29

Testing fully-assembled board. All works after fixing a few firmware bugs. Note the UART pinout issue below; a small change needed. Git:

• ​https://github.com/eshazen/skedi/tree/main/hardware/mux_14seg_proto
• ​https://github.com/eshazen/skedi/tree/main/firmware/led_1642

2023-03-05

Soldered on the MCU and connectors. Wire pin 5-11 on MCU (see ECO). Set F_CPU to 1MHz and baud rate to 1200. Communication works, and the LED control signals show life.

Next step: get Chris to solder on LED chips and LED displays.

2023-02-28

Have in hand an LED board X-NUCLEO-LED16A1 with LED1642 chip.

Use header connectors to make a few connections to Arduino UNO:

// Wiring:
// D13 - [out] SCK
// D12 -  [in] SDO
// D11 - [out] SDI
// D10 - [out] PWCLK
// D2  - [out] LE

Also all GND and +5V.

Working software: ​https://github.com/eshazen/skedi/tree/main/firmware/led_test (only tested on ATMega328)

ECOs for Rev 1 display board

• UART pins wrong. There are two choices:

  REMAP bit 0  RXD0   TXD0
      0        PA2*   PA1
      1        PB2    PA7*

  * PCB wiring.  N.B. PB2 is not used

So fix is to set REMAP=1 and wire pins 5 (PB2) and 11 (PA2) together.