Subject:
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Re: IR port Communication
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Thu, 27 Mar 2003 16:43:14 GMT
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Viewed:
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6289 times
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Michael Franklin Bosu wrote:
> ERIKA is an RTOS(erika.sssup.it).
>
> The kernel of ERIKA does not support the the serial
> port communication through the IR port.
>
> I want to add that functionality to ERIKA.
>
> My final task will be to to develop an application the
> will allow communication between the PC and the RCX
> such that commands can be sent from the PC to control
> the RCX, for example to increase or decrease the speed
> of a car.
>
> I have been struggling with this for some time now.
>
> I need guidance on this, this is my first task on the
> lego mindstorm, i am new to this.
>
> Thanks,
> Michael.
>
>
>
have you try to look at lnp.c and lnp-logical.c ?
See the old version there are not the remote command it's easier
It seems that lnp-logical.h use the S_RDR byte to understand what is
send on the IR port look at this
void rx_core(void) {
#endif
time_t new_tx;
lnp_timeout_reset();
if(tx_state<TX_ACTIVE) {
// foreign bytes
//
new_tx = sys_time+LNP_BYTE_SAFE;
if (new_tx > allow_tx) allow_tx = new_tx;
lnp_integrity_byte(S_RDR);
} else {
// echos of own bytes -> collision detection
//
if(S_RDR!=*tx_verify) {
txend_handler();
tx_state=TX_COLL;
} else if( tx_end <= ++tx_verify ) {
// let transmission end handler handle things
//
tx_state=TX_IDLE;
S_RDR byte is declared in the #include <sys/h8.h> file
Here is a way to begin you own search
nanobapt
nanobapt
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Message is in Reply To:
 | | IR port Communication
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| ERIKA is an RTOS(erika.sssup.it). The kernel of ERIKA does not support the the serial port communication through the IR port. I want to add that functionality to ERIKA. My final task will be to to develop an application the will allow communication (...) (24 years ago, 27-Mar-03, to lugnet.robotics.rcx.legos)
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