众所周知，当两个齿轮转速不一致时，是无法运转的，但不是不可能运转。借此推演，生活中，做事效率不同的同事该如何共事？以下谈谈个人的看法。
1. 不要期望效率低的同事能在短时间内改变现状
2. 不要期望效率高的同事有很好的耐性
3. 不要期望加班能解决此类问题（加班目的是用来解决量的问题）
4. 磨合过程中要发现问题，提出问题，思考解决方案并行动。善于利用各种方法达到沟通效率最大化（反馈及时跟手）。例如文字留言，碎片化的工作整理成块来做，问题在线文档实时同步，建立常见问题资料库等。
5. 双方坚持朝正能量前进，保证高效率的同事持续高效输出，低效率的同事工作不气馁
*: means done by hardware
* load word @0x0000-0000 to MSP
* load word @0x0000-0004 to PC (reset handler)
fetch
decode
execute
overview:
startup_device.s file contains the size of the stack that is used by exceptions and interrupt service routines (ISR) for the current project. The heap which is used by memory allocation functions is configured in this file.
Reset_Handler:
– set up exception vectors tables offset
– initialize stack
– initialize the memory system, if using MMU
– initialize critical I/O devices
– initialize variables required by C and call the main() function
‘Get the result of 7+8’ is a program.
‘blink the LED’ is a program.
A program is a task we ask the SOC to execute.
How program works?
Fetch (the CPU get the instruction from flash accroding to the PC into IR)
Decode (IR decoder interpre IR instruction into control signals steps of control unit)
Execute (the CPU works base on control signals)
What’s inside Flash & RAM?
Flash tear down
RAM map
For example: STM32F107xx
STM32F107xx(SOC) = Cortex-M3 + FLASH + RAM + Clock + DMA + I/O + USART + TIMERS + SPI + I2C + CAN + ADC + DAC + FSMC + Ethernet + USB
Cortex-M3(ARM Core) = Cortex-M3 CPU + NVIC + TPIU + ETM + SWJ + DWT + ITM + FPB
Cortex-M3 CPU (CPU)(like arm7tdmi, but not the same) tear down:
CPU
Cortex-M3
Basic SOC
STM32F107xx
1. Matrix mathematics facts theories formulars
Do it daily, and you will see the change! Plan is the direction to success.
123, go. you don’t need to think.
never stop the process untill you finish.
It’s the same!
william2017 