Unable to unload conflicting slot #47
Description
From @psiphi75 on December 11, 2015 4:37
I am running bonescript 0.2.5 (the latest) on a Beaglebone Black RevC. Running an up-to-date Debian 7 (7.9??) and kernel as follows:
Linux beaglebone 3.8.13-bone79 #1 SMP Tue Oct 13 20:44:55 UTC 2015 armv7l GNU/Linux
I get the following error when running the code listed here (http://beagleboard.org/support/BoneScript/ServoMotor/):
Unable to unload conflicting slot: Write to CapeMgr slots failed: Error: EEXIST, file already exists
I have determined that the file that "exists" in the error above is:
/sys/devices/bone_capemgr.9/slots
The code that I have provided a link to is:
var SERVO = 'P9_14';
var duty_min = 0.03;
var position = 0;
var increment = 0.1;
b.pinMode(SERVO, b.OUTPUT);
updateDuty();
function updateDuty() {
// compute and adjust duty_cycle based on
// desired position in range 0..1
var duty_cycle = (position*0.115) + duty_min;
console.log(duty_cycle);
b.analogWrite(SERVO, duty_cycle, 60, scheduleNextUpdate);
console.log("Duty Cycle: " +
parseFloat(duty_cycle*100).toFixed(1) + " %");
}
function scheduleNextUpdate() {
// adjust position by increment and
// reverse if it exceeds range of 0..1
position = position + increment;
if(position < 0) {
position = 0;
increment = -increment;
} else if(position > 1) {
position = 1;
increment = -increment;
}
// call updateDuty after 200ms
setTimeout(updateDuty, 200);
}Note, it took a bit of debugging to get the messages above. The actual error I get is:
/usr/local/lib/node_modules/bonescript/src/my.js:230
callback(resp);
^
TypeError: undefined is not a function
at onUnloadSlot (/usr/local/lib/node_modules/bonescript/src/my.js:230:13)
at unloadSlot (/usr/local/lib/node_modules/bonescript/src/my.js:219:13)
at onWriteSlots (/usr/local/lib/node_modules/bonescript/src/my.js:193:43)
at onReadSlots (/usr/local/lib/node_modules/bonescript/src/my.js:182:13)
at onFindCapeMgr (/usr/local/lib/node_modules/bonescript/src/my.js:157:9)
at Object.exports.load_dt (/usr/local/lib/node_modules/bonescript/src/my.js:140:5)
at onDTBOExists (/usr/local/lib/node_modules/bonescript/src/my.js:317:26)
at onDTBOExistsTest (/usr/local/lib/node_modules/bonescript/src/my.js:264:13)
at Object.exports.create_dt (/usr/local/lib/node_modules/bonescript/src/my.js:259:9)
at Object.exports.setPinMode (/usr/local/lib/node_modules/bonescript/src/hw_capemgr.js:102:12)
Copied from original issue: jadonk#111