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matherp
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Posted: 01:05pm 20 Mar 2019

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Please find attached version 5.05.09

2019-03-20_225106_ArmmiteL4.zip

2019-03-20_235914_Armmite_L4_Manual.pdf

All reports of bugs and/or errors/omissions in the documentation are appreciated. If you are interested in the Armmite L4 do please have a look at all the differences compared to the Micromite that are documented in the manual. There is a lot that has been spread out over various threads that finally I have brought together.

New things in this release:

Support for STM32L496RGT6 64-pin chip 308K free flash memory and 256K RAM

POLYGON command: see this thread for an example program

DIFF function:
DIFF(adcpin1, adcpin2)
Returns the differential voltage between two pins set up as analogue inputs. The voltage will be in the range -VCC to VCC.
In the chip pinout listing in the manual ADC channels are identified with a channel number e.g. ANALOG_IN_1. The pin pairs must start with an odd number channel and then the next pin must be the even numbered channel one greater. As an example for the 64-pin chip:

[code]SETPIN 8,AIN
SETPIN 9,AIN
PRINT DIFF(8,9)[/code]

Both voltages on the pins must be in the absolute range 0 to VCC as with any normal analogue input
Edited by matherp 2019-03-21

lizby
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Posted: 03:05pm 20 Mar 2019

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Thanks very much for all of your work on this chip set. This makes for a very full range of chips and pinouts for mmbasic, with special features and inexpensive pre-built boards in the STM Nucleo set.

I see that the documentation says "The firmware should also run on the following processors ... STM32L476RGT6 ... But limited/no testing has been carried out."

Does this mean that the NUCLEO-64 STM32L476RG should work? Nucleo-L64

If so, wow--$15USD for 64 pins.

Also, what 8" LCD works with this?Edited by lizby 2019-03-22

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matherp
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Posted: 03:16pm 20 Mar 2019

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Quote Does this mean that the NUCLEO-64 STM32L476RG should work?

Yes it does but I'm not very confident in all aspects of peripheral support - needs more testing. I've swapped the processor out on my Nucleo-L476RG for a STM32L496RGT6 which has much more RAM (256KB available to Basic)

Quote Also, what 8" LCD works with this?

None, Use an Armmite H7 (NUcleo-L743ZI) if you want the bigger displays. The biggest display supported is the ILI9481 at 4"

Edited by matherp 2019-03-22

lizby
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Posted: 05:32pm 20 Mar 2019

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(Note the footer on each page of the manual says "Micromite eXtreme Manual".)

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sagt3k

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Posted: 08:47pm 20 Mar 2019

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Hi matherp
You're doing an exemplary job, the manual is wonderful.
Concerning LittleFS, is possibile to implement diskfree function or something similar that indicates how much free space or blocks remain free?
Thanks
Antonio

lizby
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Posted: 01:16am 21 Mar 2019

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On the 64-pinner, what is IC pin 2, C13, connector 5, pin 23?

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panky

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Joined: 02/10/2012
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Posted: 01:23am 21 Mar 2019

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Great work Peter, many thanks.

Re the 476 (and I guess the 496), does the firmware above work on these 2 or should we use the 476 special firmware you recently published in this thread?

panky

PS. Is there any specific areas of the 476 you would like tested?Edited by panky 2019-03-22

... almost all of the Maximites, the MicromMites, the MM Extremes, the ArmMites, the PicoMite and loving it!

matherp
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Posted: 09:12am 21 Mar 2019

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Thanks for the feedback. Minor update to the code relating to flash memory and manual fixes.

2019-03-22_060002_ArmmiteL4.zip

2019-03-21_190244_Armmite_L4_Manual.pdf

Changes:

New function to report free space on a flash memory chip

PRINT MM.FREE

Change to FORMAT command. You can now format a flash memory chip that isn't configured with OPTION FLASH
Syntax is:

FORMAT CSpinno

This solves a problem if the flash gets corrupted and stops the processor booting. The main firmware should be re-flashed and then the flash memory chip reformatted BEFORE configuring it.

Quote (Note the footer on each page of the manual says "Micromite eXtreme Manual".)

Fixed

Quote Concerning LittleFS, is possibile to implement diskfree function or something similar that indicates how much free space or blocks remain free?

Done

Quote On the 64-pinner, what is IC pin 2, C13, connector 5, pin 23?

Fixed in manual

Quote Re the 476 (and I guess the 496), does the firmware above work on these 2 or should we use the 476 special firmware you recently published in this thread?

Please use this firmware. Things to test are special peripheral functions like I2C, SPI, PWM, analogue, DAC. But beware of wiring on the Nucleo e.g. Pin A5 is connected to the green LED by default so the DAC2 won't work properly unless SB21 is removed.Edited by matherp 2019-03-23

lew247

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Posted: 07:09am 22 Mar 2019

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Thanks Peter, another outstanding job
The only request I'd like but I guess it's not essential would be a Typical Circuit like you did for the MM showing the pins that need to be connected to make it work and the external components that are essential

matherp
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Posted: 08:18am 22 Mar 2019

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Quote The only request I'd like but I guess it's not essential would be a Typical Circuit like you did for the MM showing the pins that need to be connected to make it work and the external components that are essential

This is given in the manual in the section on minimum circuits - just not as a drawing. One of the great things about the STM32L4 series is that it is so easy to wire - no VCAP to worry about. Just wire the power and GND pins, decouple each pair with 0.1uF, clock crystal with usual caps, pull BOOT0 pin low, pull RESET pin (NRST) high. That's it!

sagt3k

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Posted: 08:55am 22 Mar 2019

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Hi matherp
In future, is it possible to think (apart winbond flash) external uSD on STM32 with more flash as L452/L496?
It would be nice to be able assign a letter to every CS, A: as
Option flash Cs, A:
Option SDcard Cs, B:

Thanks
Antonio

circuit
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Posted: 12:53pm 22 Mar 2019

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Congratulations, Peter, on an excellent package of firmware and documentation. This is very much appreciated. This really establishes the Micromite technology for these PICs in a very effective manner.

matherp
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Posted: 10:16am 24 Mar 2019

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Trivial fix for a bug that stopped I2C CLOSE working properly

2019-03-24_201532_ArmmiteL4.zip

Manual update giving additional information on the use of monochrome displays

2019-03-25_054342_Armmite_L4_Manual.pdf Edited by matherp 2019-03-26

lizby
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Posted: 12:48am 25 Mar 2019

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Can you provide a link for a 4" LCD per the manual: ILI9481 controller 480x320 pixel TFT, 3.5�, 4� with SPI I/F, RGB565?

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lizby
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Posted: 01:17am 25 Mar 2019

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In the manual: "REFESH When using buffered TFT drivers (all monochrome displays) this
command forces a screen update"

Should it be REFRESH?

In the text command, perhaps the manual should note that with a monochrome display, if "c" is 0 and "bc" is 1, the text will be inverted (e.g., white on black).

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matherp
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Posted: 08:07am 25 Mar 2019

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Please find attached manual update

2019-03-25_180609_Armmite_L4_Manual.pdf

Missing command added:

I2C CHECK addr

Runs a probe on address �addr�. MM.I2C is set to 0 if the
address responds and 1 if it doen�t

Quote In the manual: "REFESH When using buffered TFT drivers (all monochrome displays) this
command forces a screen update"

Thanks: corrected above

Quote In the text command, perhaps the manual should note that with a monochrome display, if "c" is 0 and "bc" is 1, the text will be inverted (e.g., white on black).

Added to the Display Support section

Quote Can you provide a link for a 4" LCD per the manual: ILI9481 controller 480x320 pixel TFT, 3.5�, 4� with SPI I/F, RGB565?

4" Edited by matherp 2019-03-26

lizby
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Posted: 01:52pm 25 Mar 2019

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>4"

Ah, ok--it's got pi headers. I was hoping for the 14-pin variety.

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sagt3k

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Posted: 09:55am 26 Mar 2019

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Hi matherp
I'm trying to understand more on litteFs on L4xx.
Can I use uSD also?
Are there spaces limitation to respect?
I have seen that is possible to mount litteFs partion on linux.
Thanks
Antonuo

matherp
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Posted: 10:07am 26 Mar 2019

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Quote I'm trying to understand more on litteFs on L4xx.
Can I use uSD also?
Are there spaces limitation to respect?

No the Armmite L4 only supports one of the three listed Winbond flash memory chips, 4Mb, 8Mb, or 16Mb

Quote I have seen that is possible to mount litteFs partion on linux.

I assume this is if littleFS is used on an SD card but is not relevant hereEdited by matherp 2019-03-27

vincenthimpe
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Posted: 03:16pm 27 Mar 2019

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How is the timed sleep implemented ? are you using the RTC wakeup timer ?
Which clock domain : RTCclock with post divider or CLK_SPRE

The reason i'm asking : i want to use PC13 to control the power system under control of the wakeup mechanism.

basically :
in RTC_CR
set OSEL to 11 (wakeup output enabled)
set POL to 1 ( active high)
set RTC_OUT_RMP to 0 ( brings RTC_ALARM to PC13 )

the idea is the following:

when invoking SLEEP 10 :
PC13 goes low and the cpu goes to sleep for 10 seconds.
after the time has elapsed PC13 goes high and the cpu wakes up.
PC13 is controlled by the vbat power domain so it can toggle even if the main
power of the cpu is off.

The main regulators on the board ( VCC_digital and VCC_analog ) will be under
control of PC13. That way the processor can cut its own power supply ( and power
to all other stuff on the board ). As long as VBAT is present the system can restart itself : when an alarm comes PC13 goes high : the regulators spin up and the cpu comes out of sleep.

Are there commmands to manipulate the registers directly ( like peek and poke ). i want to try to implement this from the basic domain without having to dig into the C code and recompiling everytime.

If this can't be done i will resort to an external RTC chip to provide the periodic wakeup, but it would be nice to have the processor do this as it is capable to do it (provded registers are set up properly.

this could be an idea for future improvement.

SLEEP 10 : sleep 10 seconds . pc13 remains simple GPIO
SLEEP 10, LOW : sleep to seconds then make PC13 low (PC13 now under control or RTC)
SLEEP 10, HIGH : sleep 10 seconds then set PC13 high (PC13 now under control fo RTC)
SLEEP TILL <time> ,PC13
SLEEP TILL <time>,<date> , PC13

where time is format hh:mm:ss and date is format dd:mm

for example
SLEEP TILL 22:14:00
SLEEP TILL 10:00:00, 23:04

SLEEP TILL 22:14:00 , LOW
SLEEP TILL 10:00:00, 23:04 , HIGH

Edited by vincenthimpe 2019-03-29

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