Shared Memory Question

worthyamherst

How can I access the shared memory on the Propeller. I am receiving Ping))) data from a basic stamp using an XBee. I can show the received data on the Serial Terminal, I am just wondering how I can store the data as a variable or something in the HUB.

StefanL38

whenever you are coding in SPIN the HUB-RAM is used to store your code and all variables.

you have to use the fullduplexserial-object to receive serial data. Please provide more details of what you want to do and how far you got
with the code on the propeller

keep the questions coming
best regards

Stefan

worthyamherst

CON

'ClkFreq: 80 Mhz

_XINFREQ = 5_000_000 'Adjust the frequency
_CLKMODE = XTAL1 + PLL16X 'Adjust the frequency

rx = 25
tx = 27
baudRate = 9600
polarity = 1
bits = 8

OBJ

bs : "BS2_Functions" 'Basic Stamp 2 library

VAR

byte number

PUB start

BS.start(31, 30)

repeat
number := BS.serin_char(rx, baudRate, polarity, bits) 'receive from BS; k
BS.serout_dec(30, number, baudRate, 1, 8) 'show data received on screen
BS.Debug_Char(13)
waitcnt(clkfreq/2 + cnt) '0.5 sec pause

This is the spin code we have to receive the Ping))) Data. I guess my question is if "number" is my variable that I can then send out. Is the variable automatically stored in the Hub? Can I transmit the variable from another cog? And thanks for the help. I am very new to the propeller and spin.

JonnyMac

If you store the value in a global variable defined by your top object it will be in the hub. Spin methods (even in there own cogs) will be able to see this variable. If you want a PASM cog to have access to the variable you will need to pass the variable's address to that cog.