Hi All,
I recently bought a small Maxim MAX7219 LED dot-matrix display to play with.
After reading through the 7219 data sheet closely, i found it quite easy to control this chip.
However, When the matrix powers up, there is a brief flash of ALL LEDS (well, maybe 3 or 4 don't flash on).
Straight from the data sheet:
I've programmed all the 7219 registers in my picaxe code to initialise correctly, but the data sheet doesn't show any preferable order that the 7219 should be initialised.
Has anyone had this experience? and is there a preferred order of setup codes that should be sent to the 7219 to make it bootup blank instead of a flash of LEDs?
Thanks in advance.
I recently bought a small Maxim MAX7219 LED dot-matrix display to play with.
After reading through the 7219 data sheet closely, i found it quite easy to control this chip.
However, When the matrix powers up, there is a brief flash of ALL LEDS (well, maybe 3 or 4 don't flash on).
Straight from the data sheet:
Code:
Initial Power-Up
On initial power-up, all control registers are reset, the
display is blanked, and the MAX7219/MAX7221 enter
shutdown mode. Program the display driver prior to
display use. Otherwise, it will initially be set to scan one
digit, it will not decode data in the data registers, and
the intensity register will be set to its minimum value.
Has anyone had this experience? and is there a preferred order of setup codes that should be sent to the 7219 to make it bootup blank instead of a flash of LEDs?
Thanks in advance.