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kazanova64
Joined: 10 Apr 2010
Posts: 8
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 Posted: Sat Aug 07, 2010 5:07 am |
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| Quote: | | What's your compiler version ? |
i don't exactly know, old one i think. School computers
Although i changed it to below code, it doesn't change.
| Code: | | #use spi(FORCE_HW, MASTER, MODE=0, SAMPLE_RISE, BITS=8) |
I cannot init MAC on enc28j60 because there is an if statement that check a register's LSB is 1. But SPI can't read LSB.Do you think that below code is enough to setup the SPI for ENC, which SPI setup is given above?
| Code: | | setup_spi(SPI_MASTER | SPI_L_TO_H | SPI_XMIT_L_TO_H | SPI_CLK_DIV_4) |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Sat Aug 07, 2010 11:15 am |
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| Quote: | I don't exactly know, old one i think. School computers
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Look at the top of the .LST file. It gives the version, which will be in
this format: x.xxx The .LST file will be in your project directory after
a successful compilation. Also, sometimes there may be a letter suffix
on the end, such as x.xxxb if it's an limited version.
In older versions of the compiler, #use spi() was buggy. It defaulted to
incorrect parameters. For example, it defaulted to LSB_FIRST, which
is wrong for at least 95% of SPI devices. Also, early versions were
very picky about having the certain parameters present in the #use spi
statement. If you left some of them out, it wouldn't compile.
| Quote: |
Do you think that below code is enough to setup the SPI for ENC, which SPI setup is given above?
Code:
setup_spi(SPI_MASTER | SPI_L_TO_H | SPI_XMIT_L_TO_H | SPI_CLK_DIV_4)
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Based on the SPI mode definitions below, which you should use,
you are using SPI Mode 0.
| Code: | // SPI mode definitions.
#define SPI_MODE_0 (SPI_L_TO_H | SPI_XMIT_L_TO_H)
#define SPI_MODE_1 (SPI_L_TO_H)
#define SPI_MODE_2 (SPI_H_TO_L)
#define SPI_MODE_3 (SPI_H_TO_L | SPI_XMIT_L_TO_H)
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To find the SPI mode used by the ENC28J60, look in the data sheet,
http://ww1.microchip.com/downloads/en/DeviceDoc/39662c.pdf
in this section:
| Quote: | 4.0 SERIAL PERIPHERAL INTERFACE (SPI)
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It says:
| Quote: |
The implementation used on this
device supports SPI mode 0,0 only.
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So you are using the correct mode. |
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kazanova64
Joined: 10 Apr 2010
Posts: 8
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| Posted: Sat Aug 07, 2010 5:07 pm |
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CCS PCH C Compiler, Version 4.068
My version is quite old i think. I will renew it soon.
SAMPLE_RISE is a problem there because ENC sends data in idle to active statement, so i need to read it in active to idle. Change it and no problem in spi communication.
Thanks a lot and good works.
Omer |
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