eez-open/xmos-eval-board

Evaluation board for XMOS XE216-512-TQ128 multicore microcontroller

Ownership and License

The contributors are listed in CONTRIB.TXT. This project uses the TAPR v1.0 license, see LICENSE.TXT. EEZ xmos-eval-board uses the C4.1 (Collective Code Construction Contract) process for contributions. To report an issue, use the issue tracker.

Overview

This project is an attempt to learn more about XMOS xCORE-200 multicore microcontroller XE216-512-TQ128 by making evaluation board that would be used as a prototype or building block in some future DIY open source Test & Measurement (T&M) projects. Selected MCU has 16 logical cores divided between two hardware cores (tiles)and include USB 2.0 and RGMII for Gigabit Ethernet. It has the highest pin count that comes in easy to mounting package (not BGA). The evaluation board is based on XMOS evaluation boards and a couple of so-called sliceCARDs.

Evaluation board features:

• PCB dimension: 100 x 85 mm
• Power supply: 12 Vdc with on board regulators for 1 V, 3.3 V (sequenced) and 5 V (for USB host)
• XSYS 20-pin IDC connector for JTAG and real-time debugging (via 2-wire xlink0) with ESD protection
• USB AB-mini 5-pin plug with ESD protection (hopefully can be used for OTG operation)
• Support for RGB 4.3" LCD TFT (40-pin FFC 0.5 mm), 16-bit color space supported
• LCD WLED power supply with brightness control (PWM)
• Resistive touch screen controller (SPI)
• QSPI Flash memory
• 10-pin IDC connector for direct access to Flash memory
• 16-bit I/O port expander with 2 opto-isolated input, 2 opto-isolated outputs, 3 on-board LEDs, 3 TVS protected inputs
• Real time clock (SPI) with supercap backup (Vbat)
• EEPROM (SPI)
• SDRAM (multiplexed address and data bus)
• 20-pin FFC 0.5 mm socket for Riverdi LCD TFT displays (SPI, Audio out)
• Micro SD Card socket (SPI)
• 10/100 Mbit Ethernet PHY with RJ-45 socket
• Low-power audio amplifier
• 10-pin header for cheap W5500 Ethernet module (SPI)
• Reset switch

For MCU pin mapping check Portmap for EEZ evaluation board

xmos-eval-board's Issues

SPI pins mapping rearangement

It's possible that used SPI pins mapping need to be adjusted in a way that 4 x 1-bit ports are used instead of randomly selected pins. With current mapping should still work if GPIO library is used.

GND is not connected properly on X1 DC jack

Connect both pin 1 and 3 to the GND.

Add jumper to LCD Reset input

Add jumper to LCD pin 36 to select Reset or GND that LCDs such as RFE43BH-AIW-DNS can be used.

Micro SD card pinout mismatch

Micro SD card socket (J2) pins are wrongly connected (shifted up for one pin!).

Touchscreen controller wiring

• Move M1 from Vss to Vdd (for SPI communication)
• Move WAVE from Y- to X-
• Connect M2 to Vss for 4-wire sensor

Wrong connection of DP83848C "reserved" pins

DP83848C pin 20 and 21 are wrongly connected to GND instead of +3V3

Info about used QSPI flash

Add config (.xn) and header files that xTIMEcomposer can recognize used QSPI flash memory (officially not supported).

QSPI mux control is inverted

QSPI mux signal used to control IC11 and IC14 is inverted. Has to be connected to pin 5 of IC9 instead of pin 3.