fifo serial input ?

Archiver

I am fairly new to the stamp(BS2-IC) and have been experimenting with
SERIN and am now trying to construct a serial data logger.

i am planning on using a PIC fifo buffer (as described in
files/buffer.txt from 'steve_in_nevada') then passing the data
through the stamp outputting the string to a serial LCD before
storing the data on an eeprom in a .csv format.

i understand about clocking the data in to the stamp, byte by byte
with flow control, but as i will be logging a mixed length string
with a format of i.e. <STX>0123456789<CR> i am looking for a way to
recognise when i have clocked in the <CR> character.
this is a standard suffix on the barcode or RFID scanners that i use
and i want to use the character to signal when to stop clocking in
data and then enable the write to the LCD and eeprom.

anybody got any ideas and / or code for this or is it a little too
ambitious?

best regards

steve

Archiver

On 25 Mar 04 at 3:48, steve wrote:

> ...i am planning on using a PIC fifo buffer (as described in
> files/buffer.txt from 'steve_in_nevada') then passing the data
> through the stamp outputting the string to a serial LCD before
> storing the data on an eeprom in a .csv format.

An excellent choice ;-)

> i understand about clocking the data in to the stamp, byte by byte
> with flow control, but as i will be logging a mixed length string
> with a format of i.e. <STX>0123456789<CR> i am looking for a way to
> recognise when i have clocked in the <CR> character. this is a
> standard suffix on the barcode or RFID scanners that i use and i
> want to use the character to signal when to stop clocking in data
> and then enable the write to the LCD and eeprom.

This ought to be pretty close to what you need:

'{$STAMP BS2}
serin_pin CON 0
baud CON 84
fc_pin CON 1

bar_code VAR Byte(10)

SERIN serin_pin\fc_pin,baud,[noparse][[/noparse]STR bar_code\10\CR]

Or, you could just clock the bytes in one at a time in a loop of
some kind and check each one for the <CR> ASCII code before looping
back to read the next.

Regards,

Steve
AKA steve_in_nevada

Archiver

Steve, appreciate the advice.
i went back and re-read the SERIN command in the manual and had
an "Oh Yeah!" moment. it all suddenly made sense

thanks, now i have something i can play with

regards

steve

---

On 25 Mar 04 at 3:48, steve wrote:

> ...i am planning on using a PIC fifo buffer (as described in
> files/buffer.txt from 'steve_in_nevada') then passing the data
> through the stamp outputting the string to a serial LCD before
> storing the data on an eeprom in a .csv format.

An excellent choice ;-)

> i understand about clocking the data in to the stamp, byte by byte
> with flow control, but as i will be logging a mixed length string
> with a format of i.e. <STX>0123456789<CR> i am looking for a way to
> recognise when i have clocked in the <CR> character. this is a
> standard suffix on the barcode or RFID scanners that i use and i
> want to use the character to signal when to stop clocking in data
> and then enable the write to the LCD and eeprom.

This ought to be pretty close to what you need:

'{$STAMP BS2}
serin_pin CON 0
baud CON 84
fc_pin CON 1

bar_code VAR Byte(10)

SERIN serin_pin\fc_pin,baud,[noparse][[/noparse]STR bar_code\10\CR]

Or, you could just clock the bytes in one at a time in a loop of
some kind and check each one for the <CR> ASCII code before looping
back to read the next.

Regards,

Steve
AKA steve_in_nevada