shiftout data

Printable View

- 3rd September 2007, 12:17
savnik

shiftout data

I have code for to shiftout data (works)

Code:

enable_pin var portb.7 ' set for the enable pin data_pin var porta.1 ' set for the data pin clock_pin var porta.0 ' set for the clock pin PLL var Word high enable_pin shiftout data_pin , clock_pin , 0 , [PLL\16] low enable_pin

I use the variable PLL which is 16 bit (1 word).

Now I want to send first the 16 bit (PLL1) and after to send 11 bit (PLL)
But don't work.

PLL var Word
PLL1 var Word

high enable_pin
shiftout data_pin , clock_pin , 0 , [PLL1\16]
shiftout data_pin , clock_pin , 0 , [PLL\11]
low enable_pin

How to send the first 5 bit(msb) and after to send the others 11 bit(lsb) with shiftout
- 3rd September 2007, 18:11
Kamikaze47

> How to send the first 5 bit(msb) and after to send the others 11 bit(lsb) with shiftout

I'm not totally clear on what you are trying to do, but from that i'm assuming you want to send the word in the following order: bit11 bit12 bit13 bit14 bit15 bit0 bit1 ... bit9 bit10

if so, you can do it like this:

Code:

variable1 var word temp var word temp=variable1>>11 shiftout data_pin, clock_pin, 0, [temp\5] shiftout data_pin, clock_pin, 0, [variable1\11]

If this is not the order you want the bits sent, what order do you want?
- 3rd September 2007, 20:29
savnik

Quote:

Originally Posted by Kamikaze47

> How to send the first 5 bit(msb) and after to send the others 11 bit(lsb) with shiftout

I'm not totally clear on what you are trying to do, but from that i'm assuming you want to send the word in the following order: bit11 bit12 bit13 bit14 bit15 bit0 bit1 ... bit9 bit10

if so, you can do it like this:

Code:

variable1 var word temp var word temp=variable1>>11 shiftout data_pin, clock_pin, 0, [temp\5] shiftout data_pin, clock_pin, 0, [variable1\11]

If this is not the order you want the bits sent, what order do you want?

I have the word PLL
bit15-bit14-bit13-bit12-bit11-bit10-bit9-bit8-bit7-bit6-bit5-bit4-bit3-bit2-bit1-bit0
I want to send the bit15-bit14-bit13-bit12-bit11 first
and after send the bit10-bit9-bit8-bit7-bit6-bit5-bit4-bit3-bit2-bit1-bit0
- 3rd September 2007, 20:40
Kamikaze47

Code:

temp var word ' code to send bit11-bit15 temp=PLL>>11 shiftout data_pin, clock_pin, 0, [temp\5] ' code to send bit0-bit10 shiftout data_pin, clock_pin, 0, [PLL\11] ' ' ^ ' ^ ' The 0's here means it will send the least significant ' bits first. i.e for the second section: bit0 first, ' then bit1, then bit2, etc. If you want it to send the ' most significant bits first you should set this to 1.