Subject:
|
A/D converter
|
Newsgroups:
|
lugnet.robotics.handyboard
|
Date:
|
Thu, 4 Jun 1998 06:22:38 GMT
|
Original-From:
|
HECTOR NORIEGA <110060.2126@saynotospamCOMPUSERVE.COM>
|
Viewed:
|
1177 times
|
| |
|
|
From: Hector Noriega, 3JUNE98
Thanks Adam,(adam@programmer.net) The Speed of the
A/D inproved by about 50 HZ, by getting rid of
float types, so now I can sample data at 290HZ only!.
According to the Motorola "Pink Book" the A/D
should be ready after 32 E clock cycles and
the E clock is 2 MHZ, so the sampling should be
good for 58KHZ and the nyquest is 29KHZ.
The new "IC" code is :
****************Start of "IC" code************************
/* To test Feedback Controller */
int volt_out=128; /*motor output of "0" */
int v_opt,disp;
void main()
{
while(1)
{
v_opt = atodconv(0); /*start a2d subroutine;*/
v_opt = (v_opt <<8); /* shift to get rid of one accumulator*/
v_opt = (v_opt >>8); /* shift right to read byte */
v_opt = (128 - v_opt);
volt_out = (v_opt + 128); /*scale volts to digital units.*/
poke(0x6fff,volt_out); /* A/D correction to drive motor*/
} /* end of while */
} /* end of main program*/
********************************end of "IC" code.
Thank you for your support in advance.
Hector Noriega; 110060.2126@compuserve.com
|
|
1 Message in This Thread:
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
