ATOI from an array

Jeff Lockyear

Can someone please tell me why this doesn't work so that I can get on with life?

BUTTON_EVENT [TP,1]
{
    PUSH:
	{
	STACK_VAR CHAR sChan[4]
	sChan = '1556'
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[1])"
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[2])"
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[3])"
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[4])"
	}
}

I'm trying to get around old firmware in an NXI that doesn't support 4-digit XCH commands. This is a distillation of what I've been trying to do. When I look at notifications all I get is SP$00 every time. I've tried assigning the four characters in sChan to 4 separate single CHAR variables, then doing ATOI, then sending it out, but it still doesn't work. I also tried with an NI-2100. Any ideas? At this point I don't even care if the answer makes me look dumb

Joe Hebert

Netlinx doesn’t handle single character arrays very well. You need to force its hand by using double quotes for ATOI like this:

SEND_COMMAND dvSat, "'SP',ATOI("sChan[1]")"
SEND_COMMAND dvSat, "'SP',ATOI("sChan[2]")"
SEND_COMMAND dvSat, "'SP',ATOI("sChan[3]")"
SEND_COMMAND dvSat, "'SP',ATOI("sChan[4]")"

vining

Jeff Lockyear wrote: »

Can someone please tell me why this doesn't work so that I can get on with life?

BUTTON_EVENT [TP,1]
{
    PUSH:
	{
	STACK_VAR CHAR sChan[4]
	sChan = '1556'
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[1])"
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[2])"
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[3])"
	SEND_COMMAND dvSat, "'SP',ATOI(sChan[4])"
	}
}

I'm trying to get around old firmware in an NXI that doesn't support 4-digit XCH commands. This is a distillation of what I've been trying to do. When I look at notifications all I get is SP$00 every time. I've tried assigning the four characters in sChan to 4 separate single CHAR variables, then doing ATOI, then sending it out, but it still doesn't work. I also tried with an NI-2100. Any ideas? At this point I don't even care if the answer makes me look dumb

Are you actually storing your digits in slots 0-9 or in the AMX standard 10-19? If it's a standard IR file then you need to add 10 to each number being sent since numeral 1 is in slot 11 not 1.

Jeff Lockyear

Thanks guys, I'll try the double quotes and see what happens. In the actual code I'm using I made sure to hit the right IR channel numbers. If it doesn't work I'll be back....

jweather

Joe Hebert wrote: »

Netlinx doesn’t handle single character arrays very well. You need to force its hand by using double quotes for ATOI like this:

Nothing wrong with pulling a single character out of an array, but it's a character (= a single ASCII value) at that point, not a string or char[] like atoi() wants as input. If you were trying to put it in a string, you'd be all set:

sChan = 'test'
SEND_STRING 0, "'character 3 = ', sChan[3]" // outputs "character 3 = s"

But since SP is one of the weird "literal integer" functions, you can use atoi(sChan[1]) or sChan[1]-'0' to get the integer from the ASCII value.

ProgressiveCode

Tangent regarding 'SP' and similar send_command types

jweather wrote: »

But since SP is one of the weird "literal integer" functions, you can use atoi(sChan[1]) or sChan[1]-'0' to get the integer from the ASCII value.

Those "weird" functions that have a single byte integer value for data exist because of the days of AXlink. The fewer characters transmitted, the faster the whole system could run.