Hi folks, first post here !
I,ve been working on my own design of an altimeter using the popular MPX4115 pressure sensor and a 16F88
and LCD display. I 'cheated' with the maths by using a lookup table within the programming memory of the
16F88. Anyway I got it basically working, but wanted to add more features. This was all programmed in
assembler using MPLAB and an ICD2. Whilst programming in assembler is very efficient code-wise, it is of course very
time consuming, so I started at looking at higher level language programming for the Pic. Wasn't prepared to
learn C, or pay for PicBasic, so very please to find the PicAxe. I,ve ordered some bits including a PicAxe-18X
and will start experimenting as soon as they arrive. Now onto my questions -
I see there is a few threads concerning 433mhz data transmission. As it happens, the company I work for use
Radiometrix TX2/RX2 modules - purely for very short range use. I,d like to use these with my altimeter. Are there
some code examples around for both TX and RX side? Is it as simple using the SERIN/SEROUT commands
to send a data string?
Its not all that clear how to store larger areas of data in program memory, ie larger than 256 bytes, and also
how to read that memory (for address ranges over 0xFF).
My purely 16F88 version started the lookup table at address 0x600 - is it possible
to do the same with the Picaxe-18X ? Again, are there some code examples as the ones in the manual are
a bit vague - see the Table and Eeprom descriptions. Which brings me onto another related question -
why isn't Table supported by the Picaxe-18X, as the 16F88 has read/write program memory ability?
That'll do for now, although I,m sure there will be others.
TIA,
Texy
I,ve been working on my own design of an altimeter using the popular MPX4115 pressure sensor and a 16F88
and LCD display. I 'cheated' with the maths by using a lookup table within the programming memory of the
16F88. Anyway I got it basically working, but wanted to add more features. This was all programmed in
assembler using MPLAB and an ICD2. Whilst programming in assembler is very efficient code-wise, it is of course very
time consuming, so I started at looking at higher level language programming for the Pic. Wasn't prepared to
learn C, or pay for PicBasic, so very please to find the PicAxe. I,ve ordered some bits including a PicAxe-18X
and will start experimenting as soon as they arrive. Now onto my questions -
I see there is a few threads concerning 433mhz data transmission. As it happens, the company I work for use
Radiometrix TX2/RX2 modules - purely for very short range use. I,d like to use these with my altimeter. Are there
some code examples around for both TX and RX side? Is it as simple using the SERIN/SEROUT commands
to send a data string?
Its not all that clear how to store larger areas of data in program memory, ie larger than 256 bytes, and also
how to read that memory (for address ranges over 0xFF).
My purely 16F88 version started the lookup table at address 0x600 - is it possible
to do the same with the Picaxe-18X ? Again, are there some code examples as the ones in the manual are
a bit vague - see the Table and Eeprom descriptions. Which brings me onto another related question -
why isn't Table supported by the Picaxe-18X, as the 16F88 has read/write program memory ability?
That'll do for now, although I,m sure there will be others.
TIA,
Texy