Subject:
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RCX drives Manas motors!
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 29 Jul 2001 22:41:01 GMT
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Original-From:
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Pink Tail <pinkmice@borg.com&avoidspam&>
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Highlighted:
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(details)
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1136 times
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Having decoded the manas remote controllers protocol, with a
couple of hints from RCX2 users, Zhengrong Zang amongst them,
I realised the 76kHz, 25% duty cycle, 4800 baud settings were
exactly those of the Manas.
As a result, I present for your appraisal, a tested nqc program which
controls all four Manas motors. This could easily be expanded to
include six, if you have two sets, ie; three receivers.
#define MANAS_1 5
#define MANAS_2 6
#define EM_OFF 0
#define EM_FWD 7
#define EM_REV 15
int em1,em2,em3,em4; //Global motor control locations
task main()
{
// This demo starts the manas comms task, then loops forever.
// In the loop, it steps through three control phases setting
// the motors to off, and then paired forward and reverse.
start manas;
while (true)
{
em1=EM_OFF;
em2=EM_OFF;
em3=EM_OFF;
em4=EM_OFF;
Wait(100);
em1=EM_FWD;
em2=EM_REV;
em3=EM_FWD;
em4=EM_REV;
Wait(100);
em1=EM_REV;
em2=EM_FWD;
em3=EM_REV;
em4=EM_FWD;
Wait(100);
}
}
// The manas task continuously resends the motor settings.
// When the RCX is halted, this task stops and the manas
// motors automatically shut off
task manas()
{
while (true)
{
// First ensure serial settings are still ok
SetSerialComm(SERIAL_COMM_4800|SERIAL_COMM_DUTY25|SERIAL_COMM_76KHZ);
SetSerialPacket(SERIAL_PACKET_DEFAULT);
// Set to low power so we don't run the battery down too quick
SetTxPower(TX_POWER_LO);
// Set the first unit two message bytes and send them
SetSerialData(0,MANAS_1*0x10+em1);
SetSerialData(1,em2*0x10+0x10-((MANAS_1+em1+em2)&0xf));
SendSerial(0,2);
// Set the second unit two message bytes and send them
SetSerialData(0,MANAS_2*0x10+em3);
SetSerialData(1,em4*0x10+0x10-((MANAS_2+em3+em4)&0xf));
SendSerial(0,2);
// Delay for a while so we can resend them regularly
Wait(10);
}
}
I hope this is encouraging to you as it is to me, it expands the RCX
output capability greatly.
John Barnes
--
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Message has 3 Replies:
 | | Re: RCX drives Manas motors!
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| This is fantastic! Thanks for your efforts! Anyone want to split a second manas so we each can have three motors? Would it be possible to put an image of the manas motor unit up on brickshelf? I can't tell from the catalog images what the dimensions (...) (23 years ago, 30-Jul-01, to lugnet.robotics)
| | | Info and source for Manas motors?
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| After a brief and fruitless web search (apparently "Manas" is the hindu mind) I'm asking for help with technical info, prices, etc on Manas motors. Thanks Bruce Boyes ------- WWW.SYSTRONIX.COM ---...--- Real embedded Java and much more High speed (...) (23 years ago, 30-Jul-01, to lugnet.robotics)
| | | Re: RCX drives Manas motors!
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| In the included message below, I have edited the code from the previous message to remove some stray characters and to add code for a third Manas dual-motor unit. I haven't tried to find the address for "all" Manas units. In experimenting with (...) (23 years ago, 27-Aug-01, to lugnet.robotics)
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