ATAVRSB202 Atmel, ATAVRSB202 Datasheet - Page 92

• 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

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
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