Will turn this into a series of retws with the ASCII codes for each character Tables of text, you can type retw 'Text data in retw table'. You can type one retw n per line, or use the shorthand retw n1,n2,n3.For The Parallax assembler allows great flexibility in formatting data for tables. Since the program counter always points to the next instruction,Ī 0 in w selects the first retw from the list a 1 the second a 2 the third, Instruction, which stands for 'return with literal value in w.' A table consists Lookup tables are an inherent PIC capability made possible by the retw
Routines use to change a number in the range of 0 through 7 into a byte withĪ 1 in the corresponding position for use as a bit mask. This book, you will see other applications, such as the table Pinz that some Using lookup tables to convert numbers to seven segment LED displayįinds a table entry corresponding to an index number.Ī classic application for Lookup is to convert the numbers 0 through 9 (orĠ through F in hexadecimal) into patterns for seven-segment displays.
