Ok, I have GOT to be doing something wrong...
jknightandkarr
Posts: 234
in BASIC Stamp
Ok, don't really need to post code, but there HAS to be something I am doing wrong here... Played with my Parallax Professional Dev Board Rev B, cause I needed to see if it functions. Apperently the Pulse Gen is just bad then, cause the BS2pe is recognized, programs n works. Tested using a VERY simple program, but the part I am confused with is FREQOUT pin, Duration, Freq1, Freq2 In my case its Freqout 10, 1000, 852. Hooked up to my Multifunction Counter. Now I know that 852*(1/1.51) = like 564 is what I should use to get a freq of 852hz, which i tried. now both my Multifunction Counter as well as my Digital Multimeter with Freq n duty options BOTH read the same and its WAAAAAAAAY the heck off I read like 65Khz.... I tried my Oscilloscopes probe to see if it's a case o bad probe, but same results, tried creating same desired 852 hz on a BS2 Homework board, thinking something was wrong with the BS2pe, but NOPE, waaaaaaaayyyyyy offf again this time like 39Khz, this was the first time I even used the BS2 HW board, so there's no way possible its damaged. So I am litterally confused WHAT the issue(s) are... I know what I should see on the counter is 0.852ish Khz, but it's not even in the same planet let alone the ballpark.... The Multifunction Counter came from Chris Savage, so I KNOW the instruments have to be correct, plus even if there was errors in one, why would 2 diff instruments give same reading.... Though my DMM did read off like 5-10Khz, but after playing with Counter buttons got them reading the same so ANY ideas WHAT the issue is????? Ground of Test probe to ground/neg terminal and other straight to signal wire, on IO 10.... I am really confused on this one. I know I haven't touched my electronics in like 2-3 years, but I know I ain't this rusty...... Thanks in advance for ANY help.
Joe
BTW code litterally just, minus the lang n chip settings of course
DO
FREQOUT 10, 1000, 852
LOOP
Joe
BTW code litterally just, minus the lang n chip settings of course
DO
FREQOUT 10, 1000, 852
LOOP
Comments
"The circuits in Figure 5.6 work by filtering out the high-frequency PWM
used to generate the sine waves. FREQOUT works over a very wide range
of frequencies (as shown in Table 5.26) so at the upper end of its range,
those PWM filters will also filter out most of the desired frequency. You
may find it necessary to reduce values of the parallel capacitors shown in
the circuit, or to devise a custom active filter for your application."
Joe