 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
S3C4530A Datasheet(PDF) 92 Page - Samsung semiconductor |
|
||||||||||||||||||||||||||||||
S3C4530A Datasheet(HTML) 92 Page - Samsung semiconductor |
|
|
92 / 432 page 
INSTRUCTION SET S3C4530A 3-50 ASSEMBLER SYNTAX SWI{cond} <expression> { cond} Two character condition mnemonic, Table 3-2. <expression> Evaluated and placed in the comment field (which is ignored by ARM7TDMI). Examples SWI ReadC ; Get next character from read stream. SWI WriteI+ “k” ; Output a “k” to the write stream. SWINE 0 ; Conditionally call supervisor with 0 in comment field. Supervisor code The previous examples assume that suitable supervisor code exists, for instance: 0x08 B Supervisor ; SWI entry point EntryTable ; Addresses of supervisor routines DCD ZeroRtn DCD ReadCRtn DCD WriteIRtn . . . Zero EQU 0 ReadC EQU 256 WriteI EQU 512 Supervisor ; SWI has routine required in bits 8-23 and data (if any) in ; bits 0-7. Assumes R13_svc points to a suitable stack STMFD R13,{R0-R2,R14} ; Save work registers and return address. LDR R0,[R14,#-4] ; Get SWI instruction. BIC R0,R0,#0xFF000000 ; Clear top 8 bits. MOV R1,R0,LSR#8 ; Get routine offset. ADR R2,EntryTable ; Get start address of entry table. LDR R15,[R2,R1,LSL#2] ; Branch to appropriate routine. WriteIRtn ; Enter with character in R0 bits 0-7. . . . . . . LDMFD R13,{R0-R2,R15}^ ; Restore workspace and return, ; restoring processor mode and flags. |
English ▼
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
