analogWrite slow when writing the value 0 #53
Description
Hi,
Since upgrading from bonescript 0.6.3 to 0.7.0 I have found that the analogWrite method takes 2-5 seconds to write the value 0 after writing any other value greater than 0.
There is also a large delay when writing to any other value greater than 0 from 0.
Please see the example below which illustrates the issue.
The following code was run after boot on a BeagleBone Black in node v8.11.4 and with kernel 4.14.49-ti-r54.
const b = require("bonescript");
b.pinMode('P8_19', b.ANALOG_OUTPUT);
function write(val) {
const start = Date.now();
b.analogWrite('P8_19', val, 2000, x => {
if (x.err) {
console.log(x.err);
} else {
console.log((Date.now() - start) + "ms");
}
});
}
write(0);
write(0);
write(0);
write(0);
write(1);
write(1);
write(1);
write(1);
write(1);
write(0);
write(0);
write(0);
write(0);
write(1);
write(1);
write(1);
write(1);
write(1);
The output from this code is:
> const b = require("bonescript");
>
> b.pinMode('P8_19', b.ANALOG_OUTPUT);
>
> function write(val) {
... const start = Date.now();
... b.analogWrite('P8_19', val, 2000, x => {
..... if (x.err) {
....... console.log(x.err);
....... } else {
....... console.log((Date.now() - start) + "ms");
....... }
..... });
... }
>
> write(0);
39ms
> write(0);
11ms
> write(0);
7ms
> write(0);
11ms
> write(1);
13ms
> write(1);
111ms
> write(1);
6ms
> write(1);
6ms
> write(1);
2ms
> write(0);
4481ms
> write(0);
4437ms
> write(0);
3602ms
> write(0);
3172ms
> write(1);
3681ms
> write(1);
2ms
> write(1);
2ms
> write(1);
2ms
> write(1);
3ms
If you exit nodejs after this and then run it again, the first write(0) calls also have a large delay (sometimes 15+ seconds for the first one).
Please let me know if you need anymore infromation from me.
Thanks