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| Search found 9 matches |
| Author | Message |
|---|---|
 Topic: 18F4550 with MMC/SD |
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| krodkey Replies: 17 Views: 25524 |
 Forum: General CCS C Discussion Posted: Mon Nov 27, 2006 12:28 pm Subject: 18F4550 with MMC/SD |
| Thanks. I did notice that after the last post, but that was the least of my probs. I finally got a chance to put the board on a good scope and was able to see that timing was a major issue. The bui ... | |
| Topic: 18F4550 with MMC/SD |
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| krodkey Replies: 17 Views: 25524 |
Forum: General CCS C Discussion Posted: Wed Nov 01, 2006 12:49 pm Subject: 18F4550 with MMC/SD |
| Latest Version of my code:
#include<18F4550.h> #use delay (clock=48000000) #fuses EC ,NOLVP, PUT, BROWNOUT, NOWDT, NOPROTECT, DEBUG, NOPBADEN, CPUDIV1, VREGEN, NOUSBDIV # ... |
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| Topic: 18F4550 with MMC/SD |
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| krodkey Replies: 17 Views: 25524 |
Forum: General CCS C Discussion Posted: Wed Nov 01, 2006 12:37 pm Subject: 18F4550 with MMC/SD |
| Implemented that line of code before the last error posting. | |
| Topic: 18F4550 with MMC/SD |
|
| krodkey Replies: 17 Views: 25524 |
Forum: General CCS C Discussion Posted: Wed Nov 01, 2006 11:26 am Subject: 18F4550 with MMC/SD |
| After changing some config settings I now get different errors for the sd and mmc card.
SD Errors:11 ERR: mmc spi is busy 11 ERR: mmc spi is busy ... |
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| Topic: 18F4550 with MMC/SD |
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| krodkey Replies: 17 Views: 25524 |
Forum: General CCS C Discussion Posted: Tue Oct 31, 2006 5:19 pm Subject: 18F4550 with MMC/SD |
| 1. Yes, you are absolutely correct. I should be using EC for my current config.
2.I inserted the oscillator statemetnts to control the speed during the card initialization. I am now realizing tha ... |
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| Topic: 18F4550 with MMC/SD |
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| krodkey Replies: 17 Views: 25524 |
Forum: General CCS C Discussion Posted: Tue Oct 31, 2006 2:38 pm Subject: 18F4550 with MMC/SD |
| Still getting the same errors. Here is the output from the spi driver if it helps:ERR: mmc spi is busy
ERR: mmc spi is busy ERR: mmc spi i ... |
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| Topic: 18F4550 with MMC/SD |
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| krodkey Replies: 17 Views: 25524 |
Forum: General CCS C Discussion Posted: Tue Oct 31, 2006 1:45 pm Subject: 18F4550 with MMC/SD |
| the card slot has "ALPS" inscribed on it with the # 45008. The card buffer is a 74LCX244DT. There is also a RES-4-CTS being used for the pull-ups on pin 8, 9, card detect and write protect ... | |
| Topic: 18F4550 with MMC/SD |
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| krodkey Replies: 17 Views: 25524 |
Forum: General CCS C Discussion Posted: Tue Oct 31, 2006 12:18 pm Subject: 18F4550 with MMC/SD |
| I am using a 18F4550 with a 48MHz external Oscillator. So far I have been unsuccessful reading and writing to a MMC or SD card using the mmc_spi.c library. Most of my testing has been done with the ... | |
| Topic: negative voltage range |
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| krodkey Replies: 2 Views: 4631 |
Forum: General CCS C Discussion Posted: Wed Jul 12, 2006 10:44 am Subject: negative voltage range |
| adc on 18f4550
PostPosted: Wed Jul 12, 2006 10:20 am Reply with quote I am collecting the analog data from strain guages that are connected to a fiberglass arm. When the arm bend the resistanc ... |
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