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Infrarotsteuerung Kategorie: Pro-Bot128 (von PepeV - 16.10.2010 10:24)

Ich nutze:
Pro-Bot128

Hi all,

For only 3 Euros I bought a simple IR remote control in a department store. With it I made a remote
control for the robot and a wealth of possibilities opened for me. The IR sensor of the robot is so
sensitive that the robot can be controlled over a distance of at least 7 meters from any (!) direction.
I think this is a possibility every Pro-bot owner should have. Though the solution is quite simple, it cost
me a lot of time to realize it and therefore I want to share what I made.

The RC transmitter I bought is programmable. With help of the manual and a lot of trial and error I
found a setting that uses the required RC-5 Philips protocol. The transmitter has 6 buttons and a switch
for TV or Satellite control. So 12 commands should be possible. In practice, there were only 11.

There is an example of an IR receiver in the collection C-Control Pro Demos. However this approach is
not suitable for the robot because it takes to much processor time. Every time RC5_Read() is called in
the loop, 130 ms is used, even when there is no IR signal. It is much more efficient to call RC5_Read()
only after an interrupt that is triggered by the IR-sensor at the beginning of a signal. I used the following
program.

#define TSOP 26

byte NewCommand;
word KeyCode, RC_Code, OldRC_Code, DeviceCode;

void main(void)
{
RC_Init();
NewCommand = false;
RC_Code = 0;

while (true)
{
if (RC_Code!=0)
{
KeyCode = RC_Code & 0b000000111111; // Extract bits 1 t/m 6
DeviceCode = (RC_Code & 0b011111000000) >> 6;
// Extract bits 7 t/m 11 and shift right by 6 positions

// The toggle bit (bit 12) is inverted when the same key is pushed
// again, not if the key is held and automatic repetition occurs.
// Thus it is possible to distinguish between those two kinds of
// repetition.

if (OldRC_Code != RC_Code)
{
NewCommand = true;
OldRC_Code = RC_Code;
}
else NewCommand = false;

RC_Code=0;
Process_RC_Code(KeyCode, DeviceCode, NewCommand);
}
}
}

void RC_Init(void)
{
RC5_Init(TSOP);
Ext_IntEnable(2,2); // TSOP is active low so falling edge trigger
Irq_SetVect(INT_2, TSOP_ISR); // TSOP is connected to port 26 = interrupt 2
}

void TSOP_ISR(void)
{
int irqcnt;
RC_Code = RC5_Read();
irqcnt = Irq_GetCount(INT_2); //Interrupt Request Counter = 0
}

void Process_RC_Code(byte aKeyCode, byte aDeviceCode, byte aNewCommand)
{
if (aDeviceCode == 0) // TV
{
switch (aKeyCode)
{
case 12: // Start/Stop
if (aNewCommand)
{
// Place your commands here
}
else
{
// Place your commands here
}
break;
case 32: // Prog+
if (aNewCommand)
{
// Place your commands here
}
else
{
// Place your commands here
}
break;
// Etcetera for other keycodes like 17 (Vol-), 16 (Vol+), 33 (Prog-), 13 (Mute)
}
}
else
{
if (aDeviceCode == 8) // SAT
{
switch (aKeyCode)
{
case 12: // Start/Stop

if (aNewCommand)
{
// Place your commands here
}
else
{
// Place your commands here
}
break;
// Etcetera for other keycodes
}
}
}
}

Regards,
Pepe

Antwort schreiben

Antworten:

Re: Infrarotsteuerung (von ulrich korth - 18.10.2010 9:36)

Re: Infrarotsteuerung (von Ondra - 16.01.2011 19:02)

Re: Infrarotsteuerung (von PepeV - 18.01.2011 16:05)