I build firmware for small systems and keep notes about what makes them work.写固件，跑长距离，也记录沿途值得留下的东西。
Embedded systems, hardware bring-up, debugging, running, and the occasional thought in between.关于嵌入式系统、板级启动、调试、跑步，以及它们之间偶尔出现的思考。
Projects项目
Low-power audio front-end低功耗音频前端
Codec clocks, DMA ownership and the timing edge around the first clean sample.编解码器时钟、DMA 所有权，以及第一帧干净采样附近的时序边沿。
↗ Running explorer and publication pipeline跑步探索器与发布流程An independent map application with provider-qualified activity identity and redacted public routes.一套独立地图应用，包含带来源限定的活动标识和脱敏公开路线。
↗ All projects所有项目 ↗Writing写作
Running跑步
— km
— public activities across —, read live from the Running explorer. Routes and the stories attached to them stay there.— 年共有 — 条公开活动；数据实时读取自跑步探索器，路线和附着其上的故事也留在那里。
Open running explorer打开跑步探索器 ↗About关于
I’m Zhicheng, an embedded software engineer in Singapore. This site keeps selected work, working notes and records from the road in one quiet place.我是郑之成，一名生活在新加坡的嵌入式工程师。这里安静地保存一些项目、工作笔记和路上的记录。