Assignments

By using a simple lvalue register assignment, a hardware engineer is able to change the value of each pin (register).

@register = expression;

Example 1

@hw_port2 = 0x55;

Example 2

@hw_port3 = @hw_port2;

Example 3

if (@hw_pin4 == 0x1) {
    @hw_port3 = @hw_port1 & @hw_pin1 + 12;
}

Local Variables Assignment

In dslang, all the variables are defined without type, and all of them are considered unsigned 64-bit integers. You can save the results of functions and boolean expressions or results of mathematical calculations alongside 64-bit addresses to the variables.

The variables can be used as input to other functions or might be used in conditional statements. The following example shows the assigning 0 to a variable named my\_variable.

my_variable = 0;

You can also assign registers (pins) or pseudo-registers (ports) to the variables.

my_variable = @hw_port2 + 0x10;

my_variable = @hw_pin2 - @hw_pin12 + 8;

Also, you can assign the results of functions to the variables.

my_variable = my_function(@hw_port2);

Or, you can decrement or increment variables by one.

my_variable++;      // equals to my_variable = my_variable + 1;
my_variable--;      // equals to my_variable = my_variable - 1;

Modify Memory

Modifying memory (BRAM memory) is possible using 'eb, ed, eq' functions.

eb: modifies a single byte.

ed: modifies a dwrod.

eq: modifies a qword value.

Example

The following code edits memory (quad-word) at 0x22 and change it to 0x1234.

IsEditApplied = eq(0x22, 0x1234);