 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
PIC16F631 датащи(PDF) 209 Page - Microchip Technology |
|
|
|||||||||||||||||||||||||||||
PIC16F631 датащи(HTML) 209 Page - Microchip Technology |
|
|
209 / 294 page  © 2007 Microchip Technology Inc. DS41262D-page 207 PIC16F631/677/685/687/689/690 14.4 Context Saving During Interrupts During an interrupt, only the return PC value is saved on the stack. Typically, users may wish to save key registers during an interrupt (e.g., W and STATUS registers). This must be implemented in software. Since the upper 16 bytes of all GPR banks are common in the PIC16F631/677/685/687/689/690 (see Figures 2-2 and 2-3), temporary holding registers, W_TEMP and STATUS_TEMP, should be placed in here. These 16 locations do not require banking and therefore, make it easier to context save and restore. The same code shown in Example 14-1 can be used to: • Store the W register • Store the STATUS register • Execute the ISR code • Restore the Status (and Bank Select Bit register) • Restore the W register EXAMPLE 14-1: SAVING STATUS AND W REGISTERS IN RAM Note: The PIC16F631/677/685/687/689/690 normally does not require saving the PCLATH. However, if computed GOTO’s are used in the ISR and the main code, the PCLATH must be saved and restored in the ISR. MOVWF W_TEMP ; Copy W to TEMP register SWAPF STATUS,W ; Swap status to be saved into W CLRF STATUS ; bank 0, regardless of current bank, Clears IRP,RP1,RP0 MOVWF STATUS_TEMP ; Save status to bank zero STATUS_TEMP register : :(ISR) ;Insert user code here : SWAPF STATUS_TEMP,W ; Swap STATUS_TEMP register into W ;(sets bank to original state) MOVWF STATUS ; Move W into STATUS register SWAPF W_TEMP,F ; Swap W_TEMP SWAPF W_TEMP,W ; Swap W_TEMP into W |
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
