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Topic: MAX7221 Led driver discussion (again) (Read 5497 times) previous topic - next topic

CrossRoads

D10 is the default pin used in the ATMega328 hardware.  From Section 19 of the data sheet:

"The interconnection between Master and Slave CPUs with SPI is shown in Figure 19-2 on page
170. The system consists of two shift Registers, and a Master clock generator. The SPI Master
initiates the communication cycle when pulling low the Slave Select SS pin of the desired Slave.
Master and Slave prepare the data to be sent in their respective shift Registers, and the Master
generates the required clock pulses on the SCK line to interchange data. Data is always shifted
from Master to Slave on the Master Out - Slave In, MOSI, line, and from Slave to Master on the
Master In - Slave Out, MISO, line. After each data packet, the Master will synchronize the Slave
by pulling high the Slave Select, SS, line."
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

xl97

Sorry.

I read your post and a was a bit unclear..

I re-read my post.. and I can see now it was a bit confusing. (sorry)

my question asking about a preference/difference..  was in regards to the 2 different SD libs I was playing with/testing.

and if there was any other 'tests' I should get used to for this or my other project?

I loaded a few of the sketches in the SDFAT LIB examples..  formatting, reading/writing .txt..etc..

all seemed to work fine/ok/passed =)


CrossRoads

I don't know, I only tried a few of the fat16lib tests to make sure the SD & uSD cards in my Bobuino design were working.
I didn't use the others.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

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