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Topic: Arduino Due and HSMCI (Read 115 times) previous topic - next topic

kogg

Hi

I'm trying to interface a sd card with the hsmci and my arduino due. Can't find any info on this subject that sheds enough light to see my way through.

My main problem seems to be interfacing the sd the actual arduino board. The hsmci pin out on 3x8e are as follows

 PIO_PA20A_MCCDA     MCCDA
 PIO_PA19A_MCCK       MCCK
 PIO_PA21A_MCDA0     MCDA0
 PIO_PA22A_MCDA1     MCDA1
 PIO_PA23A_MCDA2     MCDA2
 PIO_PA24A_MCDA3     MCDA3

Found all the needed pin outs bar this one, PIO_PA21A_MCDA0, this one is for LED TX on physical pin 107 so there is no way to connect MCDA0 from the sd card to PIO_PA21A_MCDA0 because the pin is not present.

Is there a solution, am I on the right track here, or is this a limitation of the arduino due?



ard_newbie

#1
Jun 19, 2018, 02:36 pm Last Edit: Jun 19, 2018, 02:38 pm by ard_newbie
Solder a cable to the PA21 pin from TX ?

An other solution is with a TAIJUINO board with all pins exposed.

kogg

Thanks ard_newbie. Poor design, I mean come on the designers were faced with either putting an tx led or a pin for hsmci and they decided a led was more important. lol

ard_newbie


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