iOS Development 01: Xcode and Swift

CS193P Intro Swift的 “foundation” Package 该package包含了基本的数据类型（String, Array etc.）以及构建app所需的基本结构体。 import foundation Xcode如何快速查看文档在Xcode中按住Option然后点击对应的关键字或builtin types，便能快速跳转到对应的文档下。 Read more 16 Jul 2023 - less than 1 minute read

Embedded Engineer Note01

Become Embedded Software Engineer From Scratch Assembly language ” If you understand assembly language you’ll have a fundamental understanding of how a microcontroller works. You might be able to get by in embedded systems without understanding assembly, but you won’t be great without it.” Peripherals GPIO Interrupt Read more 02 Jul 2023 - less than 1 minute read

NVIDIA CUDA Camp -- Day 2

GPU内存的种类以及每个线程对它的读写权限 Register Shared Memory: 每个block共享 Local Memory: 线程私有 Global Memory: 每个设备共享每个设备可以完成 Constant Memory Texture Memory 课件截图内存管理API // CPU malloc() memset() free() //GPU cudaMalloc() cudaMallocManaged() //申请统一内存 cudaMemset() cudaFree() cudaHostAlloc() // for allocating Pinned(Page-locked) memory. 设备间的数据传... Read more 07 Feb 2023 - 8 minute read

NVIDIA CUDA Camp -- Day 1

CPU 架构 cpu中较多的晶体管用于数据缓存和流程控制, 只拥有几个少数的高速计算核心. Fetch/Decode: 取指令、译码单元 ALU(Arithmetic Logic Unit): 算术逻辑单元 Execution Context: 执行上下文池 Data cache: 数据缓存流水线优化单元: 如乱序执行、分支断定预测、memory预存取等。课件截图单核（少核）处理器发展的物理约束 \[P = C * V ^{2} * f\] P 为功耗， V是电压，C是和制程有关的一个常数项，f是时钟频率。制程极限：量子隧穿。时钟频率墙：处理器的时钟频率无法保持线性的增长。存储墙：虽然提高晶体管集成度可以增加处理数据的速... Read more 05 Feb 2023 - 10 minute read

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