参数资料
型号: IV80C52EXXX-25:RD
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP44
封装: 1.40 MM HEIGHT, VQFP-44
文件页数: 19/134页
文件大小: 3805K
115
8011Q–AVR–02/2013
ATmega164P/324P/644P
The following code examples show how to do an atomic read of the TCNTn Register contents.
Reading any of the OCRnA/B/C or ICRn Registers can be done by using the same principle.
Note:
1. The example code assumes that the part specific header file is included.
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”
instructions must be replaced with instructions that allow access to extended I/O. Typically
“LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.
The assembly code example returns the TCNTn value in the r17:r16 register pair.
Assembly Code Example
TIM16_ReadTCNT
n:
; Save global interrupt flag
in
r18,SREG
; Disable interrupts
cli
; Read TCNT
n into r17:r16
in
r16,TCNT
nL
in
r17,TCNT
nH
; Restore global interrupt flag
out
SREG,r18
ret
C Code Example
unsigned int
TIM16_ReadTCNT
n( void )
{
unsigned char
sreg;
unsigned int
i;
/* Save global interrupt flag */
sreg = SREG;
/* Disable interrupts */
_CLI();
/* Read TCNT
n into i */
i = TCNT
n;
/* Restore global interrupt flag */
SREG = sreg;
return
i;
}
相关PDF资料
PDF描述
IDT75T43100S66BS SPECIALTY MICROPROCESSOR CIRCUIT, PBGA304
IDT79RC64T575250DPI 64-BIT, 250 MHz, RISC PROCESSOR, PQFP208
IDT79R3081-40DL8 32-BIT, 40 MHz, RISC PROCESSOR, PQCC84
ICS84325EM 250 MHz, OTHER CLOCK GENERATOR, PDSO24
ICS84427BM 625 MHz, OTHER CLOCK GENERATOR, PDSO24
相关代理商/技术参数
参数描述
IV-811MX 制造商:Digital ID View 功能描述:8 CH H.264 DVR USB REMOTENO HDD 制造商:DIGITAL IDVIEW 功能描述:8 CH H.264 DVR USB REMOTE NO HDD
IV-811Z-960H-1000 制造商:Digital ID View 功能描述:8-Channel 960H i-Cloud Series DVR with 1TB HDD
IV-811Z-960H-500 制造商:Digital ID View 功能描述:8-Channel 960H i-Cloud Series DVR with 500GB HDD 制造商:DIGITAL IDVIEW 功能描述:8-CHNL ICLOUD 960H DVR 500GB HDD HDMI OUT
IV-811ZAECO-1000 制造商:Digital ID View 功能描述:8 Ch H.264 DVR D1 1Tbb Dvd
IV-811ZAECO-500 制造商:Digital ID View 功能描述:8 Ch H.264 DVR D1 500GB Dvd