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From: | Eduardo lavratti |
Subject: | Re: [Paparazzi-devel] I2C startup on lisa/L |
Date: | Tue, 24 Jul 2012 18:18:54 +0000 |
Hello Eric, to use MKK esc you need some lines in airframe file:
<firmware name="rotorcraft"> <define name="ACTUATORS_START_DELAY" value="3"/> ... ... ... this command put some delay in ESC startup communication. About MAG initialization, i have the same issue in my TWOG + 10DOF IMU with HMC5843; To solve this i put a little delay in MAG initialization. Put a issue about this problem on github. regards > Date: Tue, 24 Jul 2012 17:30:24 +0200 > From: address@hidden > To: address@hidden > Subject: [Paparazzi-devel] I2C startup on lisa/L > > Hi, > > I have received a new Aspirin2.0, with the lisa/L adaptator, it is realy > better tha my...... I will rework on it!!! > > Bur I have some problems: > > On power-up the mag (5883 on I2C) does not start one time on 5 try. 95% > of the powerup test the mkk controlers does not start. > > If I reset trought the jtag (reprog the cpu) no problem 100% good power > up and the MAG and the MKK run correctly. > > The other way is to power-up, the MKK led are on, reset the STM32 (CC > on the reset cap, C9) the MKK red leds are OFF. I have change C9 from > 100nF to 1µF, the problem still present. > > With logic analyzer, when the MKK fail, we can see 4 acces(to the 4 mkk > adress) without ACK, then the STM32 make only READ acces to the MKK.... > > Probably we try to early to config/write to the MKKK, they are not "wake > up", and the STM32 driver goes in an aproximative state > > On lisa/M with aspirin 1.5, some time the mag hang to at power up. > > Some one have seen this problems? > > Eric > > > > > > > Le 20/07/2012 16:30, Eric BAHIER a écrit : > > Hello, > > > > I continue to work o my problemsss with Lisa/L and Aspirin 1.5like > > I have solve some problems, wire connection length, and decoupling > > capa.... > > > > With the last GIT (V3.9) (with aspirin.c from july 19from Christophe). > > I have from 20sec to 5 minutes of stay in live I2C. > > I have connect the logic analyzer on the I2C (SDA-SCL) and on Gyro-int > > and Mag-int. > > > > The software read (@68) the gyro when the interrupt occur, it "smell" > > perfect. each interrupt is followed by read cycle, then the interrupt > > request is clear. the interrupt remain every 1.8 ms. > > > > Concerning the MAG (@1E) the software acces it every time, with or > > without interrupt..... > > The MAG is able to give new measurement at 75hz (13ms), the interrupt > > request is present every 13ms, same as the specs. > > But the software read all the time.... evry about....400µsec, we have > > 100µs free time between the end a read, and the beginning of the > > follow on. > > > > on lisa/M the stability is (probably) better, but some time the MAG > > does not run.... > > > > > > thank for your help, > > > > regards > > > > Eric > > > > > > -- > ************************************ > Lez Concept EURL > > Eric BAHIER > 15 chemin neuf > 34 980 Montferrier sur LEZ > France > > Tel : 33 4 67 59 92 53 > Fax : 33 9 59 15 92 53 > ************************************ > > > _______________________________________________ > Paparazzi-devel mailing list > address@hidden > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel |
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