ATAVRSB202 Atmel, ATAVRSB202 Datasheet - Page 92
ATAVRSB202
Manufacturer Part Number
ATAVRSB202
Description
KIT BATT MGMT FOR ATMEGA32HVB
Manufacturer
Atmel
Specifications of ATAVRSB202
Main Purpose
*
Embedded
*
Utilized Ic / Part
*
Primary Attributes
*
Secondary Attributes
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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8042B–AVR–06/10
The following code examples show how to do an atomic read of the TCNTn register contents.
Reading any of the OCRn register can be done by using the same principle.
Note:
The assembly code example returns the TCNTnH/L value in the r17:r16 register pair.
Assembly Code Example
TIMn_ReadTCNTn:
C Code Example
unsigned int TIMn_ReadTCNTn( void )
{
}
; Save global interrupt flag
in r18,SREG
; Disable interrupts
cli
; Read TCNTn into r17:r16
in r16,TCNTnL
in r17,TCNTnH
; Restore global interrupt flag
out SREG,r18
ret
unsigned char sreg;
unsigned int i;
/* Save global interrupt flag */
sreg = SREG;
/* Disable interrupts */
_CLI();
/* Read TCNTn into i */
i = TCNTn;
/* Restore global interrupt flag */
SREG = sreg;
return i;
1. See “About Code Examples” on page 8.
ATmega16HVB/32HVB
92
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