....with dot matrix LCD

Hello everyone!

I want to develop a simple application that need to use dot matrix LCD (parallel) with my board, DSK TMS320C6416 from Spectrum Digital. Can anyone show me a way how to do this? Is it possible? I believe this is very simple since Intel 8051 based microcontroller can do this.

Can we access the daughtercard's pins using C?

Really need helps,
azreque Start a New Thread

Azreque-

> I want to develop a simple application that need to use dot matrix LCD
> (parallel) with my board, DSK TMS320C6416 from Spectrum Digital. Can
> anyone show me a way how to do this? Is it possible? I believe this is
> very simple since Intel 8051 based microcontroller can do this.
>
> Can we access the daughtercard's pins using C?

An LCD module parallel interface ought to look like an async mem device, for example
SRAM or Flash, so EMIF (external mem interface) is the likely way to go. EMIF
signals are available on the daughtercard headers. Here are a couple of documents
that might help:

Interfacing C6x EMIF to async devices...

http://focus.ti.com/lit/an/spra542a/spra542a.pdf

Daughtercard specification...

http://www-s.ti.com/sc/psheets/spra711/spra711.pdf

-Jeff Start a New Thread

Hello Jeff,
Thanx for your kind reply. I've go through the Technical Reference from Spectrum Digital (DSKTMS320C6416), and now what I need to do is using J4 connector to connect to the dot matrix LCD, and send data to address 0xA0000000.

About _DOTP2 intrinsic, from SPRU395b,

int DotP(const short * restrict m, const short * restrict n, int count)
{
int i;
int sum= 0;
m3_m2 = _hi(_amemd8_const(&m[i]));
m1_m0 = _lo(_amemd8_const(&m[i]));
n3_n2 = _hi(_amemd8_const(&n[i]));
n1_n0 = _lo(_amend8_const(&n[i]));
count >> 2; */ count is divided by two if using same main
function to call this subroutine*/
for (i=0; i < count; i++)
{
sum += _dotp2(m3_m2, n3_n2) +
_dotp2(m1_m0, n1_n0);
}
return sum;
}

can the 'sum' in the above example we change to 'double' (or more) data type? What I mean here is, we want to perform dot product with two 64bits data (we access using _hi and _lo intrinsic for 32bits higher and lower respectively), so the result could be more than 32bits (int) type. Anybody that have used _DOTP2 give the answer please?

Thanx for your kind attention.

Rgds,
azreque

Jeff Brower wrote:
Azreque-

> I want to develop a simple application that need to use dot matrix LCD
> (parallel) with my board, DSK TMS320C6416 from Spectrum Digital. Can
> anyone show me a way how to do this? Is it possible? I believe this is
> very simple since Intel 8051 based microcontroller can do this.
>
> Can we access the daughtercard's pins using C?

An LCD module parallel interface ought to look like an async mem device, for example
SRAM or Flash, so EMIF (external mem interface) is the likely way to go. EMIF
signals are available on the daughtercard headers. Here are a couple of documents
that might help:

Interfacing C6x EMIF to async devices...

http://focus.ti.com/lit/an/spra542a/spra542a.pdf

Daughtercard specification...

http://www-s.ti.com/sc/psheets/spra711/spra711.pdf

-Jeff

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