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RPN scientific calculator firmware for $13 calculator kit
03-18-2020, 10:02 PM
Post: #41
RE: RPN scientific calculator firmware for $13 calculator kit
Could you just use a STC15F2K60S2 MCU instead of the IAP15W413AS that comes with the kit? . . . that would provide 60k of flash rather than the 13k for the standard MCU and therefore enable space for a whole raft of additional functions.
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03-19-2020, 02:14 AM
Post: #42
RE: RPN scientific calculator firmware for $13 calculator kit
(03-18-2020 10:02 PM)DWiskow Wrote:  Could you just use a STC15F2K60S2 MCU instead of the IAP15W413AS that comes with the kit? . . . that would provide 60k of flash rather than the 13k for the standard MCU and therefore enable space for a whole raft of additional functions.

Is the STC15F2K60S2 MCU pin-compatible with the IAP15W413AS? If so, that'd be ideal!

Tom L
...other than that, Mrs. Lincoln, what did you think of the play?
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03-19-2020, 07:29 AM (This post was last modified: 03-20-2020 11:02 AM by DWiskow.)
Post: #43
RE: RPN scientific calculator firmware for $13 calculator kit
(03-19-2020 02:14 AM)toml_12953 Wrote:  Is the STC15F2K60S2 MCU pin-compatible with the IAP15W413AS? If so, that'd be ideal!

Yes, just bigger flash (60k) and RAM (2K) and for under $2 delivered
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03-23-2020, 05:19 AM
Post: #44
RE: RPN scientific calculator firmware for $13 calculator kit
Yes, it's a pin-compatible drop in replacement. The only disadvantage is that when programming the flash, it takes longer to erase. To program a blank microcontroller, you have to add a couple of additional options to stcgal: -l 1200 -t 12000

Just as an update, haven't made any progress on anything, but hopefully eventually...
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03-23-2020, 07:02 AM
Post: #45
RE: RPN scientific calculator firmware for $13 calculator kit
Some of the extra flash could be used for keystroke programs, if the base firmware is programmable. This is a very space efficient method to add functions -- the WP 34S included quite a number of functions in its XROM and allowed user libraries in flash.

Pauli
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03-23-2020, 09:38 AM
Post: #46
RE: RPN scientific calculator firmware for $13 calculator kit
(03-23-2020 05:19 AM)jklsadf Wrote:  Yes, it's a pin-compatible drop in replacement. The only disadvantage is that when programming the flash, it takes longer to erase. To program a blank microcontroller, you have to add a couple of additional options to stcgal: -l 1200 -t 12000

Just as an update, haven't made any progress on anything, but hopefully eventually...

Now that you have all that extra space to play with, go for it! I still have my key label template ready to modify for whatever additions you make so once you announce a new version the new labels can be ready in a few minutes.

Tom L
...other than that, Mrs. Lincoln, what did you think of the play?
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