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8-bit HEX to BCD convertor |
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Code Library -
8051 Assembly
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This subroutine converts 8 bit Hexadecimal number into its equivalent BCD value. The number to be converted should be in the Accumulator. The output BCD number is stored in R0 & R1. R0 is used to save the MSB i.e. the hundreds place & R1 stores the LSB i.e. the Tens & Units place.
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hextobcd:
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| mov r0,#00h |
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| mov r1,#00h |
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| cjne a,#00h,c1_hextobcd |
//If number is not 0 then continue |
| ret |
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c1_hextobcd:
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| clr c |
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| mov b,#100 |
//First divide by 100 |
| div ab |
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| mov r0,a |
//save MSB in R0 |
| clr c |
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| mov a,b |
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| mov b,#10 |
//Divide by 10 |
| div ab |
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| swap a |
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| mov r1,a |
//save the tens place in the Higher nibble of R1 |
| mov a,b |
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| orl a,r1 |
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| mov r1,a |
// save the tens place in the Lower nibble of R1 |
| ret |
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