SD Card Issues

Philldapill

I'm trying to get my SD Card to work with the Propeller, but I'm having some problems...

I've built my own SD Card PCB with Pull-Ups attached to all IO pins. I'm confident in the hardware itself, so that shouldn't be the issue here. I've downloaded the latest FemtoBasic object from the Obex, and I've made a simple program that I THOUGHT would be able to mount the SD Card, then open a file. I can't even get the card to mount. The program seems to hang at the point where the SD Card tries to mount. In fact, more precisely, it hangs internally at initSDCard inside mount(). What gives?

Here's the code:

CON
  _clkmode = xtal1 + pll16x
  _xinfreq = 5_000_000                                  'NOTE SPEED
  SD_DO         = 0
  SD_CLK        = 1
  SD_DI         = 2
  SD_CS         = 3
OBJ 
                                                        '1 Cog here 
  uarts         : "pcFullDuplexSerial4FC"               '1 COG for 4 serial ports
  SD            : "fsrwFemto"
  
VAR
  
Pub Start
  uarts.Init
  uarts.AddPort(0,31,30,{
}  UARTS#PINNOTUSED,UARTS#PINNOTUSED,UARTS#DEFAULTTHRESHOLD, { 
}   UARTS#NOMODE,UARTS#BAUD115200)                      
  uarts.Start                 
                          
  waitcnt(clkfreq*2 + cnt) 'Allow some time to switch to the PST

  uarts.dec(0,SD.mount(SD_DO,SD_CLK,SD_DI,SD_CS))
  uarts.str(0,string("It worked!!",13))

Mike Green

You have to initialize the low level SD card driver by first calling

SD.start(@ioControl) ' Start I2C/SPI driver

where

VAR long ioControl[noparse][[/noparse] 2 ]

Philldapill

D'oh. Thanks Mike - works like a charm now!