HardLabs

Liu

liuwanwan1·liu·schematic/netlist.net

This repository ships a schematic but no board layout.

About the Liu PCB

Liu is an open source TI MSP430/CC PCB design by liuwanwan1, published on GitHub. It is a board, with 31 components from 16 distinct parts.

Its main chip is the MSP430FR2355, from the TI MSP430/CC family. Other key parts include the LCD1602, TLV70033 and MCP6002. By type, the board carries 10 resistors, 5 connectors, 5 capacitors, 4 ICs, 4 diodes and 2 switches.

From the project

题19 波形采集、存储与回放系统 / MSP430FR2355 + DriverLib 嵌入式工程 + KiCad 网表 + 设计报告

双通道周期信号的 采集 → 非易失存储 → 连续回放 → 实时测量显示 系统。 主控 TI MSP430FR2355（片内 12-bit ADC、32KB FRAM、双 SAC 内置 DAC/OA），整体功耗约 25 mW，断电后自动循环回放已存波形。

需要 TI MSP430Ware 的 msp430fr2xx5xx6xxdriverlib。CCS 新建 MSP430FR2355 工程，把 firmware/inc 加入 include 路径，firmware/src/.c 加入编译，链接 driverlib；或使用 msp430-elf-gcc 指定 driverlib 源码。

- 采样率 50 ksps（delaycycles(160) @8MHz = 20us），每周期 50 点 → 周期量化误差 ≤2%。 - FRAM 非易失：800 字节波形 + 校准结构存入片内 FRAM，断电不丢，上电即循环回放。 - 测量：过零计数法求周期，最大/最小点求 VH/VL，按校准系数反算 mV/μs。 - 低功耗：平时 LPM3 + ACLK=REFO，ADC 仅在 ~4ms 采集窗开启，LCD 反射式关背光。 - 两点校准**：上电自动校零点偏置；接 0V 与 4V 标定分压比 k，存 FRAM。

Main components on the Liu

MSP430FR2355LCD1602TLV70033MCP6002

Liu bill of materials (BOM)

31 components, 16 distinct parts.

QtyPartRefs
1
MSP430FR2355
U1
1
LCD1602
U2
1
TLV70033
U3
1
MCP6002
U4
1
DC005-5V
J1
4
BNC
J2, J3, J4, J5
1
10k
RV1
2
BUTTON
SW1, SW2
4
BAT54S
D1, D2, D3, D4
2
100nF
C1, C2
1
1uF
C3
1
4.7uF
C4
1
10uF
C5
4
16.5k_0.1%
R1, R3, R7, R8
4
10k_0.1%
R2, R4, R5, R6
2
100R
R9, R10

Liu design files

The KiCad project lives in the liuwanwan1/liu repository on GitHub; these links point at the commit this page was built from.

Liu: common questions

What microcontroller does the Liu use?

The Liu is built around the MSP430FR2355, from the TI MSP430/CC family.

How many components are on the Liu?

31 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Liu design files?

From the liuwanwan1/liu repository on GitHub, which has a netlist; the links under Design files point to each one.

Can I use the Liu design in my own project?

The repository has no license, so all rights stay with liuwanwan1. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Liu without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug TI MSP430/CC firmware against it before you order a PCB.

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