I didn't get this far in computer science, just saying. When it's time to copy the values into the serial port register, that's a RAM load then a register to register copy, so I don't think you'd ever see the character literals in your assembly. Seems like this hinges on the actual data the arduino receives to try to decode - can you edit it into your question If you're using Python 3, then yes a b' on the string won't be recognised because it's not valid JSON - you will almost certainly need need to encode the string to ascii before transmission. Regardless, the C compiler isn't going to compile a string literal to literal values in assembly, it's going to put those characters into RAM, then store an address to them. import serial import json serial serial.Serial ('/dev/ttyUSB0', 9600, timeout1) while True: data serial.readline (). String literals get allocated into RAM, too depending on the platform they're allocated lower in the stack space, nearer to other read-only program data, because the C specification says that you shouldn't try to mutate a string literal. I am trying to use the following python script to read from the serial port and print out the various values of the json string. So in assembly, that looks like "copy this register into the RAM address bus, do a couple of other things (you have to wait for the RAM), then copy the RAM data bus into this register." Sort of the whole purpose of "writing" assembly by writing C, as best I understand this, is that the compiler allocates variables into writes and loads to and from the RAM, via RAM access registers. Smarter (better) disassemblers use various techniques to figure this stuff out, a common one is only attempting to disassemble code lines that are executed.įrankly, I can't find the characters "H e l l o" anywhere in the assembly Two lines, send via Serial Monitor, one at a time. The Arduino code is working fine when inputting data via Arduino Serial Monitor. If you disassemble this in most disassemblers (static) it can't tell the difference between the data I've placed there and code, so it'll try (unsuccessfully) to disassemble it, usually producing garbage code that makes no sense. To mark the end of a message, I'm using the string '', informing both Arduino and Python that the message was completely delivered.Open up the Arduino IDE and go to Sketch > Include Library > Manage Libraries. I am struggeling how to store the JSON serial inputfile into Arduino variables that i can use. My_string db "Hello World!", 0 // Assemble the "string" as if it were code, null terminate offset my_string To parse JSON files using Arduino, youll need to install the ArduinoJson library. (To set a device for selected days during the week.). Jmp // jump forward to first macro (past the Hello World string) Sometimes putting the data in the code itself and jumping over it creates faster functions, or easier to write macros, or smaller functions that take up less code-space. In assembly, data can be stored pretty much anywhere the user can figure out where to cram it. The disassembler tried to make these commands, but they're the data.starting at address 6ae we have 48, 65, 6c, 6c, 6f.
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