Still have some questions.

1. Can i skip the thermeter part now? Because i have no time to consider it if it is not necessary.

2. Actually, the printer has to print only number and a "-", likes123-123-234, and at most use 254 dots per line. And as you guys said, the sequence of the strobe should be first step the motor then fire 1,3,5 all together, then step the motor, so that it is now set to the new line position and then fire 2,4,6 all together. So, is it i have to provide all the DI (Data input) and CLK (Clock) before firing the first 1,3,5 and finally, fire the LATCH to complete the print process.
Is it correct? Because fromt he posted Operation Sequence, the strobe 1,3,5 is fired coincided with the CLK and DI together.

3. I have written code to do this experiment, with the following situation and code section.
For the clock sequence: When i want to print only
white white white black black white white white(00011000) to the DI (Data input), so that it print only a small line. the clock and DI and STROB will be?
Initallize:
PIN_DI = 0
PIN_CLK = 0
PIN_LAT = 1
PIN_STB135 = 0
PIN_STB246 = 0

1st step of first step line: using 11.0592MHz Chip and AT89C51
nops x 3
PIN_DI = 0
nops x 2
PIN_CLK = 1
nops x 2
PIN_DI = 0
nops
PIN_CLK = 0
repeat the above for 3 times, then repeat it for 2 times, but PIN_DI = 1 for black, then do the first 3 set of code again.

then
PIN_STB135 = 1
PIN_STB246 = 0
delay for the 1 microstep
PIN_STB246 = 1
PIN_STB135 = 0
delay for the 1 microstep
nops x 3
PIN_LAT = 0
nops x 4
PIN_LAT = 1

I have tried this code, but doesn't work, nothing is printed.