Troubles convert a long into string for C3 + SD-Card (write string to file (sdcard)

nomad · 2013-01-26 02:12

hi,
i am working with the C3-board and the SD-Card
please have a look to my oldThread " Troubles with PropC3 and SD-Card"

i am working with c3-quadV2-SD-01.spin (its adapted from ggg558877)
and with dave_fsrw.spin (from Dave Hein)

in the moment the code works with static strings
a) in the DAT Section or
b) str := "4"

all stuff ok
but i would work with my DummyDatas (aka GPS-Datas) as

Long latfloat := 47.51332

in the "dave_fsrw.spin" - drive
i can do with

sdcard.pputs(@str) or
sdcard.pwrite(@str,8)

but i have big troubles to convert the latfloat to a stringBuffer which is correct
for pputs or pwrite ?
in the c3-quadV2-SD-01.spin you find some experiments
result : not printable chars ?
have somebody a way to solve this problem ?

attachments:
- c3-quadV2-SD-01.spin
- dave_fsrw.spin

thanks for help and hints
regards nomad

kuroneko · 2013-01-26 04:57

' this is wrong: gpsstring := FS.FloatToString(latfloat)
    ' term.str(@gpsstring)

Here gpsstring already holds the address of the converted string. In order to print it a simple term.str(gpsstring) is sufficient. Note that pputs and pwrite also just take an address value (e.g. result of FloatToString) so @ isn't required.

CON
  _clkmode = XTAL1|PLL16X
  _xinfreq = 5_000_000

OBJ
  serial: "FullDuplexSerial"
    fstr: "FloatString"

VAR
  long  latfloat

PUB null

  serial.start(31, 30, %0000, 115200)
  waitcnt(clkfreq*3 + cnt)
  serial.tx(0)

  latfloat := 47.51332
  serial.str(fstr.FloatToString(latfloat))
  serial.tx(13)
  
DAT

nomad · 2013-01-26 21:28

hi kroneko
thank you for your help :-)
today i make with your snippets some experiments
and make then a reply
regards
nomad

nomad · 2013-01-27 03:24

hi kuroneko
many thanks for your code.
its running with

- 1 write dummyDatas (lat,lon,alti) into gps1.txt of the SD-Card
- 2 read dummyDatas in 1 line to PST

--- code

- WRITE
sdcard.pputs(fstr.FloatToString(latfloat))
sdcard.pputs(" ")
sdcard.pputs(fstr.FloatToString(lonfloat))
sdcard.pputs(" ")
sdcard.pputs(fstr.FloatToString(GPSaltitude))

- READ to PST
bytefill(@sbuf, 0, BUF_SIZE) ' clear buffer
readln(@sbuf, 80) ' read line from file
term.str(@sbuf)

as attachment a screenshot as
- test-kuroneko-2701.jpg

thanks for your help :-))

regards
nomad

Troubles convert a long into string for C3 + SD-Card (write string to file (sdcard)

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