Prop C3 & SD

Wael_ElEgyptian

Hi Folks,

My question is very simple: what are the pin assignments for the SD on the C3 platform?
I have tried the C3_SD_Demo_010.spin and it works fine. However, I wanted to write to files on the SD so I tried the fsrw.spin , but I am having troubles , the propeller does not see the SD and the card does not get mounted. I have used the following code from a tutorial on the "Gadget Gangster" ,

Here is my code:

===========================================================
CON
_clkmode = xtal1 + pll16x
_xinfreq = 5_000_000

DO = 0
CLK = 1
DI = 2
CS = 3

OBJ
sdfat : "fsrw"
pst : "Parallax Serial Terminal"

PUB demo | mount
pst.Start(115_200)
waitcnt(clkfreq*4 +cnt)

mount := \sdfat.mount_explicit(Do,CLK,DI,CS)

if mount < 0
pst.str(string(13,"Failed to mount",13))
abort

pst.str(string(13," SD Card was found and mounted fine",13))

sdfat.popen(string("Text.txt"),"w")
sdfat.pputs(string(" Hello World!!!!!!!!", 13, 10))
sdfat.pclose

sdfat.unmount

================================================

prof_braino

Hi Wael_ElEgyptian

Could you edit you post and put the "code" tags around your code? "/code"

It makes it easier to read the spin.

If you replace the double quotes " " in the example line with square brackets [ ] it comes out like:

Could you edit you post and put the

tags around your code?

Tharkun

Wael_ElEgyptian wrote: »

the propeller does not see the SD

On the C3 the SD pins are not directly connected to the prop, you have to initialize the hardware SPI interface I/O pins from propeller to card.

Look here: C3_SD_DRV_010.SPIN, PUB SPI_Init(mode)

Rsadeika

I think the question that he is asking is, what is the secret. I believe he is looking for something more specific, than "go look at some exiting examples". Soon I will have to venture down that road myself, so, if anybody has a more specific answer, that would help at least two people.

Ray

Mike Green

There's not a simple answer. Look at the C3 documentation here. In particular, look at "Unleashing the Prop C3", pages 21-24 and 36-38.

Rsadeika

Wael, I guess you will have to fend for yourself. You may want to try the Gadget Gangster PP USB, that has an easier way of using the uSD card.

Ray

JT Cook

We ran into this problem as well, so we modified some of the existing drivers (I think mostly done by David Betz) and I was able to use those consistently. Take a look at the programs here:
ftp://ftp.propeller-chip.com/PropC3/Games/Jay_T_Cook/jtc_c3_bootloader_v002/jtc_c3_bootloader_v002/