Pushing floating point numbers onto the stack -- Practical subroutines for MCS-51 microcontrollers-EEWORLD

Collect

Label: FPUS Function: Push floating point numbers onto the stack

Entry condition: Operand is in [R0].
Exit information: Operand is pushed to the top of the stack.
Affected resources: A, R2, R3 Stack requirement: 5 bytes
FPUS: POP ACC ; Save the return address in R2R3
MOV R2,A
POP ACC
MOV R3,A
MOV A,@R0 ; Push the operand into the stack
PUSH ACC
INC R0
MOV A,@R0
PUSH ACC
INC R0 MOV
A,@R0
PUSH ACC
DEC R0
DEC R0
MOV A,R3 ; Push the return address into the stack
PUSH ACC
MOV A,R2
PUSH ACC
RET ; Return to main program

Reference address：Pushing floating point numbers onto the stack -- Practical subroutines for MCS-51 microcontrollers

Previous article：Floating point number pop--MCS-51 single chip microcomputer practical subroutine
Next article：Floating point number transmission--MCS-51 single chip microcomputer practical subroutine

Recommended ReadingLatest update time:2024-11-16 13:41

[Assembly Learning Notes] MCS-51 Instruction Symbol Description

Symbol Description #da ta: represents an 8-bit immediate value (da ta) in the instruction . “#” indicates that the following data is an immediate value. #da ta16: represents a 16-bit immediate value in the instruction. direct: Indicates the address of an 8-bit internal data storage unit. It can be the unit addres

[Microcontroller]

Detailed explanation of the internal clock circuit of MCS-51 single chip microcomputer

There is a high-gain inverting amplifier inside the MCS-51 microcontroller chip, whose input is the chip pin XTAL1 and whose output is the pin XTAL2. Outside the chip, a crystal oscillator and a fine-tuning capacitor are connected across XTAL1 and XTAL2 to form a stable self-excited oscillator, which is the clock circ

[Microcontroller]

Detailed explanation of the internal clock circuit of MCS-51 single chip microcomputer

An example of programming for the serial port application of MCS-51 single-chip microcomputer

1. Experimental design Timing interrupt program, serial port P3.0, P3.1 output, use 74LS164 shift register to drive light emitting diode ; Timer 0 in mode 1, 16 bits, interrupt once every 10ms ; 40H 10ms timing counting unit ; 41H initial value is 01101101B ; Bit address 00H=1 ; Timing mode 1 is 10MS: THX=0ECH

[Microcontroller]

Popular Resources
Popular amplifiers