problem with left or right shift

[lokeshrajoria]

hello everyone,
i have problem with left shift...can you solve this....


i want to write a simple function which will give output is 32 bit frame:

if input type == 0 - then output will shift left frame id by 18 bits and 31st bit as 0

eg for input configred frame id 0x7ff(111,1111,1111),
FrameID= 0x1ffc0000(0001,1111,1111,1100,0000,0000,0000,0000 )

if input type == 1 then - output will set 31st bit in FrameID

eg for input configred frame id 0x7ff(111,1111,1111),
FrameID= 0x800007ff(1000,0000,0000,0000,0000,0111,1111,1111 )

[miller]

Greetings,

I do not really understand your issue. It would probably help if you included the perl code that you've already tried. Including the assignment creating the variable you're wanting to modify.

- Miller

[lokeshrajoria]

Hello Miller,
here i am putting code.....

# Loop for all frames of nwi as TX slot, TX mux(if any), RX slot, RX mux.
# This is to fill the remaining fields of the Can_Frame_Details hash.
foreach $frm_name (@tx_frm_list, @rx_frm_list, @undec_frm_list) {
    # Populating the ddCANID key.
    $SptIm::Can_Frame_Details{$frm_name}{ddCANID} = $SptNetParser::Network_File_Contents_Hash{FrameNIDetails}{$ni_name}{$frm_name}{FrameId};
 
    # Populating the IdType key.
    if ($SptNetParser::Network_File_Contents_Hash{NetInterfaceDef}{$ni_name}{Protocol} eq "CAN29") {
        $SptIm::Can_Frame_Details{$frm_name}{IdType} = 1;
 
        # Set the Is_Extended_Can_Type to one, if CAN29 exists in NET file
        $SptDbCfg::Is_Extended_Can_Type = 1;
        #my problem is here if $SptIm::Can_Frame_Details{$frm_name}{IdType} = 1 #then will shift left frame id by 18 bits #and 31st bit as 0
        #eg for configred frame id 0x7ff(111,1111,1111), ddCANID= #0x1ffc0000(0001,1111,1111,1100,0000,0000,0000,0000)
    } else {
        $SptIm::Can_Frame_Details{$frm_name}{IdType} = 0;
        #if $SptIm::Can_Frame_Details{$frm_name}{IdType} = 0 then will set 31st bit #in ddCANID
        #eg for configred frame id 0x7ff(111,1111,1111), ddCANID= #0x800007ff(1000,0000,0000,0000,0000,0111,1111,1111)
    }
 
    # Populating the Position key.
    $frm_ndx++;
    $SptIm::Can_Frame_Details{$frm_name}{Position} = $frm_ndx;
} # End of subroutine create_can_frame_details_oem
 

Thank's & Regard's
Lokee

[lokeshrajoria]

hello all,
i have solved this problem...


problem was:

#----------------------------------------------------------------------------------#
# /* Algorithm for Calculating the ddCANID */ #
#Problem: ddCANID will be calculate in two way based on protocol type #
# if (protocol equal CAN11) then #
# set IdType = 0; #
# ddCANID will be shift 18 bit left | 31st bit will be set as a 0; #
# /* eg ddCANID = 0x7ff then output will be ddCANID = 0x1ffc0000 #
# if (protocol equal CAN29) then #
# set IdType = 0; #
# ddCANID 31st bit will be set as a 1; #
# /* eg ddCANID = 0x7ff then output will be ddCANID = 0x800007ff #
#----------------------------------------------------------------------------------#
answer:

CALCULATING THE ddCANID

foreach $frm_name (@tx_frm_list, @rx_frm_list, @undec_frm_list)
{
#Populating the ddCANID key.
$SptIm::Can_Frame_Details{$frm_name}{ddCANID} =
$SptNetParser::Network_File_Contents_Hash{FrameNID etails}{$ni_name}
{$frm_name}{FrameId};

# Populating the IdType key.
if ($SptNetParser::Network_File_Contents_Hash{NetInte rfaceDef}{$ni_name}
{Protocol} eq "CAN29")
{
$SptIm::Can_Frame_Details{$frm_name}{IdType} = 1;
$SptIm::Can_Frame_Details{$frm_name}{ddCANID} | = 1 << 31;

# Set the Is_Extended_Can_Type to one, if CAN29 exists in NET file
$SptDbCfg::Is_Extended_Can_Type = 1;
}

if ($SptNetParser::Network_File_Contents_Hash{NetInte rfaceDef}{$ni_name}
{Protocol} eq "CAN11")
{
$SptIm::Can_Frame_Details{$frm_name}{IdType} = 0;
$SptDbCfg::Is_Standard_Can_Type = 0;
$SptIm::Can_Frame_Details{$frm_name}{ddCANID} << = 18 | 0 << 31;
}
}

thank's & regard's
lokee