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oA2D Class Reference

Analog to Digital converter on A2D port. More...

#include <oa2d.h>

Inheritance diagram for oA2D:

Public Member Functions
	oA2D (IOLINE channel)
	Default constructor specifying which pin on A2D port.
int	value (void) const
	Digital value on channel.
void	operate (bool b)
	True starts A2D; otherwise 0 on channel.
Static Public Member Functions
int	TCR1 (void)
void	TMCR (int iarb)
bool	HSQR (int chan, int val)
	Configures the host sequence register.
bool	HSRR (int chan, int val)
	Configures the host sequence request register.
bool	CPR (int chan, int val)
	Configures the channel priority register (Ref. TPU Channel Utilization).
bool	CIER (int chan, int cie)
	Configures the channel interrupt enable register.
int	CISR (int chan)
	Returns the channel interrupt status register.
void	CISR_clear (int chan)
	Clears the channel interrupt status register for the channel.
bool	TICR (int cirl, int cibv)
	Configures the TPU interrupt configuration register.
int	tpu_vector (IOLINE channel)
	Given a channel, returns the vector number to use for an interrupt.

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Detailed Description

Analog to Digital converter on A2D port.

Operation

To avoid the problem with the 3 state latch, I simply read three times on the port. This is not an elegant solution if speed is critical, but it avoids the problem of reading another oA2D objects data. I can think of two other solutions:

• Internally store each channels states, and ensure there is no collision--Although there will be a size cost associated with this solution.
• Just return the next one, and leave the collision avoidance to the user. Although this solution is great if one is only using one A2D object! Otherwise, it leaves user with a mess to deal with.
  Perhaps, best would be to create three objects each with its specialty: size, speed, and ease of use.

Code

#include <oA2D.h>
int main()
{
oA2D a2d(0);
  a2d.operate(true);
  while (a2d.value() < 80)
  {
    // .. do something useful
  }
}

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Member Function Documentation

bool CIER (  int  chan, int  cie )  [static, inherited]

Configures the channel interrupt enable register. Parameters: int:  channel int:  1 enables; 0 disables

bool CPR (  int  chan, int  val )  [static, inherited]

Configures the channel priority register (Ref. TPU Channel Utilization). Parameters: int:  channel int:  priority

bool HSQR (  int  chan, int  val )  [static, inherited]

Configures the host sequence register. Parameters: int:  channel int  dependent upon function (CFSR) selected

bool HSRR (  int  chan, int  val )  [static, inherited]

Configures the host sequence request register. Parameters: int:  channel int:  dependend upon function

int TCR1 (  void   )  [static, inherited]

misnomer--should be TCR1 divisor--return number of clocks (PSCK,TCR1P modifications) Globally available object. Can be used in combination with TPU_REGISTER definition to say TPU_REGISTER->CFSR.BITS...

void TMCR (  int  iarb  )  [static, inherited]

was tpu_init Configures the channel function select register

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The documentation for this class was generated from the following file:

• oa2d.h

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