[En-Nut-Discussion] Accessing device via NCS7 on EIR1.0

[Ulrich Prinz]

Hi!

Doesn't anybody have any idea, why I can't initialze NCS7?
In the meanwhile I searched for the DM9000 code in nutos, where I copied 
the NCS config from. Unfortunately this DmInit isn't called anywhere. So 
I assume that the ethernet Interface is inited somewhere else. But there 
is also no further reference to any kind of NCS besides in 
crtat91_rom.S. Here some init is done that includes programming of the 
several NCSx Outputs of the chip.
Unfortunately this file is not mentioned in any other file elsewhere.

So again I am stuck.

Any idea?

Best regards
Ulrich


Ulrich Prinz wrote:
> Hi!
> 
> Trying to attache a display to my Elektor Internet Radio 1.0...
> I use NCS7, DB0..DB8 and NWE/NRD, but I am failing at all. I initialize 
> the NCS7 like this
> 
>     /* Init PIOC Pin20 as NCS7
>      */
> 
> #if 0
>      GpioPinSetHigh(NUTGPIO_PORTC, 20);
>      GpioPinConfigSet(NUTGPIO_PORTC, 20,
>        GPIO_CFG_PULLUP|GPIO_CFG_DISABLED|GPIO_CFG_PERIPHERAL1);     #else
>      outr(PIOC_PUER, _BV(PC20_NCS7_B)); // Enable PullUp on NCS7
>      outr(PIOC_PDR, _BV(PC20_NCS7_B));   // Disconnect from PIO
>      outr(PIOC_BSR, _BV(PC20_NCS7_B));   // Select Function B
> #endif
>      outr(SMC_CSR(7)
>          , (10 << SMC_NWS_LSB)
>          | SMC_WSEN
>          | (2 << SMC_TDF_LSB)
>          | SMC_BAT
>          | SMC_DBW_16
>          | (2 << SMC_RWSETUP_LSB)
>          | (2 << SMC_RWHOLD_LSB)
>          );
> 
>     /* set display power and oscillator */
>     gxdisp_cmdw(0x06,0x01); // display off, normal current
>     gxdisp_cmdw(0x05,0x01); // set soft reset
>     NutSleep(1);
>     gxdisp_cmdw(0x05,0x00); // end soft reset
>     gxdisp_cmdw(0x04,0x01); // reduced current
> 
> Using a Scope I can see that the data (0x06 0x01 0x05 0x01...) is 
> written to the bus, but address lines don't change and control lines 
> like NWE and NCS7 are not active.
> The initialization is copied from DM9000 interface, where it seems to 
> work pretty fine, if I listen to what comes out of the headphones :)
> 
> Is there a limitation when or where I can initialize NSCx while running 
> ethernut 4.9.x system? I read a lot around in the AT91SAM7SE manuals and 
> saw some parts about protection of memories and IOs. Is there something 
> activein that manor? Crawling some code I didn't find any of the 
> possible protection registers defined. So if they don't exist, I expect 
> nutos not to use them and close me out.
> 
> Any idea?
> 
> Regards, Ulrich
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