comm.c File Reference

#include "comm.h"
#include "timer.h"
#include <util/crc16.h>

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Functions
void	CommInit (void)
	init as defined in "doc4300.pdf": figure 12. Initialization of the Receive Driver More...
	ISR (PCINT_vect)
	pin change (PCINT8) interrupt service More...
void	EnablePcint8 (void)
	enable pin change interrupt PCINT8 More...
void	DisablePcint8 (void)
	disable pin change interrupt PCINT8 More...
void	DisableUsi (void)
	disable USI module, there's no specific flag to do so -> disabling what can be done More...
void	EnableUsi (void)
	enable USI module for proper comm More...
	ISR (USI_OVF_vect)
	USI counter overflow interrupt service - signals reception of one byte. More...
UCHAR	GetSenderValues (UINT *innerTemp, UINT *outerTemp)
	establish decimal temperature values form raw stream in sequence More...
UCHAR	PlausibilityCheck (UINT innerTemp, UINT outerTemp)
	check plausibility of recently received temperatures against specific limits More...
UCHAR	CalcCrc (void)

Variables
UCHAR	g_seq [SEQ_BUF_SIZE]
UCHAR volatile	g_seqReady = FALSE

Function Documentation

UCHAR CalcCrc

(

void

)

Definition at line 180 of file comm.c.

References CRC_OVER_ALL, g_seq, SUP_VOLT_VAL_H_ID, SUP_VOLT_VAL_L_ID, TEMP_CH1_VAL_H_ID, TEMP_CH1_VAL_L_ID, TEMP_CH2_VAL_H_ID, TEMP_CH2_VAL_L_ID, and UCHAR.

Referenced by GetSenderValues().

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void CommInit

(

void

)

init as defined in "doc4300.pdf": figure 12. Initialization of the Receive Driver

Definition at line 27 of file comm.c.

References DisableUsi(), and EnablePcint8().

Referenced by Init().

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void DisablePcint8

(

void

)

disable pin change interrupt PCINT8

Definition at line 69 of file comm.c.

Referenced by ISR().

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void DisableUsi

(

void

)

disable USI module, there's no specific flag to do so -> disabling what can be done

Definition at line 76 of file comm.c.

Referenced by CommInit(), and ISR().

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void EnablePcint8

(

void

)

enable pin change interrupt PCINT8

Definition at line 60 of file comm.c.

Referenced by CommInit(), and ISR().

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void EnableUsi

(

void

)

enable USI module for proper comm

Definition at line 84 of file comm.c.

References NUM_DB, T0_INC20, TCN_T0, and USI_CNTRNG.

Referenced by ISR().

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UCHAR GetSenderValues	(	UINT *	innerTemp,
		UINT *	outerTemp
	)

establish decimal temperature values form raw stream in sequence

Parameters

innerTemp	buffer to inner temperature
outerTemp	buffer to outer temperature

Returns

TRUE if both temperatures were valid, FALSE otherwise

Definition at line 133 of file comm.c.

References CalcCrc(), FALSE, g_seq, g_seqReady, INVALID_VAL_U16, TEMP_CH1_VAL_H_ID, TEMP_CH1_VAL_L_ID, TEMP_CH2_VAL_H_ID, TEMP_CH2_VAL_L_ID, TRUE, and UCHAR.

Referenced by main().

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ISR

(

PCINT_vect

)

pin change (PCINT8) interrupt service

Parameters

PCINT_vect

pin change interrupt vector

Definition at line 46 of file comm.c.

References DATABIT, DisablePcint8(), EnableUsi(), and TRUE.

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ISR

(

USI_OVF_vect

)

USI counter overflow interrupt service - signals reception of one byte.

Parameters

USI_OVF_vect

usi counter overflow interrupt vector

Definition at line 101 of file comm.c.

References DisableUsi(), EnablePcint8(), FlipByte(), g_seq, g_seqReady, SEQ_BUF_SIZE, SEQ_END, SEQ_STA, TRUE, and UCHAR.

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UCHAR PlausibilityCheck	(	UINT	innerTemp,
		UINT	outerTemp
	)

check plausibility of recently received temperatures against specific limits

Parameters

innerTemp	inner temperature
outerTemp	outer temperature

Returns

TRUE if both are plausible, FALSE otherwise

Definition at line 162 of file comm.c.

References FALSE, INVALID_VAL_U16, MAX_DEL_INNER_TEMP, MAX_DEL_OUTER_TEMP, MIN_ABS_INNER_TEMP, MIN_ABS_OUTER_TEMP, TRUE, UCHAR, and UINT.

Variable Documentation

UCHAR g_seq[SEQ_BUF_SIZE]

indicator for available remote temperatures sequence buffer

Definition at line 18 of file comm.c.

Referenced by CalcCrc(), GetSenderValues(), and ISR().

UCHAR volatile g_seqReady = FALSE

indicator for a total received sequence

Definition at line 22 of file comm.c.

Referenced by GetSenderValues(), and ISR().