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disco4now

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Posted: 01:47am 03 Mar 2023

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HardingJohn said it runs 5.05.11 everytime. 5.07.01b0 detects the Ver V chip, but something on my board must be different to the Nucleo ZI2 board ...

It may be worth trying 5.05.11 as John had some boards (his own design) that would not run MMBasic on the later version. Not a solution but may be worth eliminating whether its a similar situation.

Regards
Gerry

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KeepIS

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Posted: 02:33am 03 Mar 2023

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Hi Gerry,

Downloaded and tried, but no difference.

There is just no communications with these two newer units, it's as though there is no MMBasic programmed or the MMBasic console is not routed to the port.

Memory verification is 100% and it looks the same as the older units on read in STM Cube.

The only thing different in the Device properties in Cube is the Bootloader version and obviously the Revision ID.

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disco4now

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Posted: 03:24am 03 Mar 2023

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The info below was derived from one of Peter's posts somewhere. Might cast some suspicion on the ST-Link firmware version. Do you have one of Peters backpack V3 with provision for an external crstal you could try?
Can you see if the STLINk V3 have a 8MHz or 8.33 Mhz cystal?

ST-LINK V2/V3 Details and Update
The NUCLEOH743ZI has an ST-LINK V2 connected.
The NUCLEOH743ZI2 has an ST-LINK V3 connected.
You should be aware with the ZI2 of one possible issue. There is a design flaw on the ZI2 that doesn't exist on the ZI. The ST-LINK in both cases generates the 8MHz system clock for the H743. In the case of the ZI this is derived directly from the crystal clocking the ST-LINK V2 circuit. In the case of the ZI2 it is derived from the internal RC oscillator on the ST-LINK V3 processor. i.e. not very accurate.
There is now new firmware for the V3 which has the option of using a crystal derived clock but it isn't at 8MHZ but rather 8.33MHZ. This seems to be a setup option when updating the firmware in the ST-LINK.
DO NOT choose this option if presented with it.

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KeepIS

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Posted: 04:11am 03 Mar 2023

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I remember that conversation now.

This is ST-link V3, the Xtal on the Link part is marked 25.000 which would normally be 25MHz, then divided down for whatever is needed, so likely 8.33MHz.

I have updated the ST-Link firmware on only ONE unit.

I have Peters V1.3 Backpack but can't see a xtal location.

I'll look into this more when I get back. I've forgotten most of it.

Thanks.

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KeepIS

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Posted: 05:43am 03 Mar 2023

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BTW you can change the ST-LINK clock between 8.33 and 8 and back again. Default is 8Mhz when updating.

Don't think this is the problem I'm having. Something is seriously not right. Just looks like MMBasic is not starting or running. Adding a com port to the normally allocated Console port makes no difference, just silence. Zero access to MMBasic, only thing that talks to the two devices is STM Cube.

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matherp
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Posted: 07:59am 03 Mar 2023

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I would suspect the RTC oscillator not starting. Have you got a scope to look at the clock inputs?

KeepIS

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Posted: 08:40am 03 Mar 2023

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matherp said I would suspect the RTC oscillator not starting. Have you got a scope to look at the clock inputs?

Yes have Digital scope, I'll have a closer look, the LSE crystal osc 32.768 kHz was running when I checked one of the boards.

The boards are STM32H7 Nucleo-144 boards (MB1364), so far all links and connections look the same. Just the VDD_MCU and 1.8v-3v3 jumpers swapped around.

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KeepIS

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Posted: 09:03am 03 Mar 2023

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I can't seem to find the Clock pins for the RTC, anyone remember what they are?

It's late and I'm tired, I'll have another look tomorrow. Thanks in advance for any help.

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disco4now

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Posted: 09:21am 03 Mar 2023

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Pin 8 and 9 I think

Pin and Connector Capabilities
STM32H743ZI/STM32H743ZI2 144 Pin function and connector positions
The capabilities and allocation of each pin are detailed in this table. MMBasic can address the pins via their pin number.

Pin Features
1-PE2 DIGITAL_IN DIGITAL_OUT SSD1963-DB2
2-PE3 DIGITAL_IN DIGITAL_OUT SSD1963-DB3
3-PE4 DIGITAL_IN DIGITAL_OUT SSD1963-DB4
4-PE5 DIGITAL_IN DIGITAL_OUT SSD1963-DB5
5-PE6 DIGITAL_IN DIGITAL_OUT SSD1963-DB6
6 VBAT Backup Battery
7-PC13 DIGITAL_IN DIGITAL_OUT NUCLEO-B1 (K1)
BLUE KEY MMBasic Reset
8 32KHz Xtal
9 32KHz Xtal
10-PF0 DIGITAL_IN DIGITAL_OUT COUNT1
11-PF1 DIGITAL_IN DIGITAL_OUT COUNT2
12-PF2 DIGITAL_IN DIGITAL_OUT COUNT3
13-PF3* ANALOG_C DIGITAL_IN DIGITAL_OUT COUNT4
14-PF4* ANALOG_C DIGITAL_IN DIGITAL_OUT IR
15-PF5* ANALOG_C DIGITAL_IN DIGITAL_OUT
16 GND
17 VDD
18-PF6* ANALOG_C DIGITAL_IN DIGITAL_OUT SD-CS
19-PF7* ANALOG_C DIGITAL_IN DIGITAL_OUT SPI5-CLK SYSTEM SPI
20*-PF8 ANALOG_C DIGITAL_IN DIGITAL_OUT SPI5-IN “
21-PF9* ANALOG_C DIGITAL_IN DIGITAL_OUT SPI5-OUT “
22-PF10* ANALOG_C DIGITAL_IN DIGITAL_OUT
23-PH0 8MHz OSC
24-PH1 N/C
25 NRST RESET
26-PC0 ANALOG_C DIGITAL_IN DIGITAL_OUT OV7670-D0
27-PC1 ANALOG_C DIGITAL_IN DIGITAL_OUT OV7670-D1 SPI2-OUT
28-PC2 ANALOG_C DIGITAL_IN DIGITAL_OUT OV7670-D2 SPI2-IN
29-PC3 ANALOG_C DIGITAL_IN DIGITAL_OUT OV7670-D3
30 VDD
31 ANALOG-GND
32 VREF+
33 ANALOG-VDD
34-PA0 ANALOG_A DIGITAL_IN DIGITAL_OUT PWM-2A
35-PA1 ANALOG_A DIGITAL_IN DIGITAL_OUT PWM-2B
36-PA2 ANALOG_A DIGITAL_IN DIGITAL_OUT PWM-2C
37-PA3 ANALOG_A DIGITAL_IN DIGITAL_OUT PWM-2D
38 GND
39 VDD
40-PA4 DAC1 AUDIO-L
41-PA5 DAC2 AUDIO-R
42-PA6 ANALOG_A DIGITAL_IN DIGITAL_OUT SPI-IN
43-PA7 ANALOG_A DIGITAL_IN DIGITAL_OUT SPI-OUT
44-PC4 ANALOG_A DIGITAL_IN DIGITAL_OUT OV7670-D4
45-PC5 ANALOG_A DIGITAL_IN DIGITAL_OUT OV7670-D5
46-PB0 LCD-BL NUCLEO-GREEN BACKLIGHT
47-PB1 ANALOG_A DIGITAL_IN DIGITAL_OUT
48-PB2 DIGITAL_A DIGITAL_OUT SPI3-OUT
49-PF11 ANALOG_A DIGITAL_IN DIGITAL_OUT
50-PF12 ANALOG_A DIGITAL_IN DIGITAL_OUT
51 GND
52 VDD
53-PF13 ANALOG_B DIGITAL_IN DIGITAL_OUT
54-PF14 ANALOG_B DIGITAL_IN DIGITAL_OUT
55-PF15 DIGITAL_IN DIGITAL_OUT
56-PG0 DIGITAL_IN DIGITAL_OUT
57-PG1 DIGITAL_IN DIGITAL_OUT SSD1963-RS
58-PE7 DIGITAL_IN DIGITAL_OUT SSD1963-DB7
59-PE8 DIGITAL_IN DIGITAL_OUT SSD1963-DB8
60-PE9 DIGITAL_IN DIGITAL_OUT SSD1963-DB9
61 GND
62 VSS
63-PE10 DIGITAL_IN DIGITAL_OUT SSD1963-DB10
64-PE11 DIGITAL_IN DIGITAL_OUT SSD1963-DB11
65-PE12 DIGITAL_IN DIGITAL_OUT SSD1963-DB12
66-PE13 DIGITAL_IN DIGITAL_OUT SSD1963-DB13
67-PE14 DIGITAL_IN DIGITAL_OUT SSD1963-DB14
68-PE15 DIGITAL_IN DIGITAL_OUT SSD1963-DB15
69-PB10 DIGITAL_IN DIGITAL_OUT I2C2-SCL
70-PB11 DIGITAL_IN DIGITAL_OUT I2C2-SDA
71 VCAP
72 VDD
73-PB12 DIGITAL_IN DIGITAL_OUT COM3-RX
74-PB13 DIGITAL_IN DIGITAL_OUT COM3-TX
75-PB14 DIGITAL_IN DIGITAL_OUT NUCLEO-RED
76-PB15 DIGITAL_IN DIGITAL_OUT COM1-RX
77-PD8 CONSOLE-TX
78-PD9 CONSOLE-RX
79-PD10 DIGITAL_IN DIGITAL_OUT Keyboard Power V2 Nucleo USB Power
80-PD11 DIGITAL_IN DIGITAL_OUT
81-PD12 DIGITAL_IN DIGITAL_OUT PWM-1A
82-PD13 DIGITAL_IN DIGITAL_OUT PWM-1B
83 GND
84 VDD
85-PD14 DIGITAL_IN DIGITAL_OUT PWM-1C
86-PD15 DIGITAL_IN DIGITAL_OUT PWM-1D
87-PG2 DIGITAL_IN DIGITAL_OUT
88-PG3 DIGITAL_IN DIGITAL_OUT OV7670_PCLK
89-PG4 DIGITAL_IN DIGITAL_OUT OV7670_VSYNC
90-PG5 DIGITAL_IN DIGITAL_OUT OV7670_HREF
91-PG6 DIGITAL_IN DIGITAL_OUT Keyboard Power V1 Nucleo USB Power
92-PG7 DIGITAL_IN DIGITAL_OUT
93-PG8 DIGITAL_IN DIGITAL_OUT COUNT5-HS
94 GND
95 VDDUSB
96-PC6 DIGITAL_IN DIGITAL_OUT OV7670-D6
97-PC7 DIGITAL_IN DIGITAL_OUT OV7670-D7
98-PC8 DIGITAL_IN DIGITAL_OUT
99-PC9 DIGITAL_IN DIGITAL_OUT
100-PA8 DIGITAL_IN DIGITAL_OUT OV7670_XCLK
101-PA9 DIGITAL_IN DIGITAL_OUT
102-PA10 DIGITAL_IN DIGITAL_OUT
103-PA11 USB-D+
104-PA12 USB-D-
105-PA13 SWDIO
106 VCAP
107 GND
108 VDD
109-PA14 SWCLK
110-PA15 DIGITAL_IN DIGITAL_OUT SD-CS (backpack)
111-PC10 DIGITAL_IN DIGITAL_OUT
112-PC11 DIGITAL_IN DIGITAL_OUT
113-PC12 DIGITAL_IN DIGITAL_OUT
114-PD0 DIGITAL_IN DIGITAL_OUT
115-PD1 DIGITAL_IN DIGITAL_OUT
116-PD2 DIGITAL_IN DIGITAL_OUT
117-PD3 DIGITAL_IN DIGITAL_OUT SPI2-CLK
118-PD4 DIGITAL_IN DIGITAL_OUT COM2-DE
119-PD5 DIGITAL_IN DIGITAL_OUT COM2-TX
120 GND
121 VDD
122-PD6 DIGITAL_IN DIGITAL_OUT COM2-RX
123-PD7 DIGITAL_IN DIGITAL_OUT
124-PG9 DIGITAL_IN DIGITAL_OUT COM4-RX
125-PG10 DIGITAL_IN DIGITAL_OUT SSD1963_WR
126-PG11 DIGITAL_IN DIGITAL_OUT SPI-CLK
127-PG12 DIGITAL_IN DIGITAL_OUT SSD1963_RESET
128-PG13 DIGITAL_IN DIGITAL_OUT SSD1963_RD
129-PG14 DIGITAL_IN DIGITAL_OUT COM4-TX
130 GND
131 VSS
132-PG15 DIGITAL_IN DIGITAL_OUT
133-PB3 DIGITAL_IN DIGITAL_OUT SPI3-CLK
134-PB4 DIGITAL_IN DIGITAL_OUT SPI3-IN
135-PB5 DIGITAL_IN DIGITAL_OUT
136-PB6 DIGITAL_IN DIGITAL_OUT COM1-TX
137-PB7 DIGITAL_IN DIGITAL_OUT NUCLEO-BLUE
138 BOOT0
139-PB8 DIGITAL_IN DIGITAL_OUT I2C-SCL
140-PB9 DIGITAL_IN DIGITAL_OUT I2C-SDA
141-PE0 DIGITAL_IN DIGITAL_OUT SSD1963-DB0
142-PE1 DIGITAL_IN DIGITAL_OUT SSD1963-DB1
143 PDR-ON
144 VDD

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KeepIS

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Posted: 10:51pm 03 Mar 2023

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The clock signals don't appear on the connector pins unless links are inserted for external OSC options. Links SB40, SB41, SB44, SB46 - likely just clock leakage showing up on the pins if measuring.

The 32kHz crystal is running. I assume that means the RTC is running ??

The STLNK_MCO is feeding the CPU at around 8.13Mhz.

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KeepIS

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Posted: 12:43am 04 Mar 2023

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I reloaded Ver 5.05.11 and I noticed that the User USB OVCR led had a faint glow, and it went out when RESET was pressed.

Set the Baud rate to 34000 and I got MMBasic response when Reset Pressed.

So disco4now was right - And these Newer boards that I have do not like the latest MMBasic.

Looks Like I will have to roll back all my code for the changes made in the latest version, that now error when run.

Do we know exactly what is causing this?

Surely it can't just be Clock running a bit above 8Mhz?

If it is then I will find a crystal and fit to the spot on the H7 Board made for a Crystal.

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KeepIS

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Posted: 12:51am 04 Mar 2023

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OK Crazy stuff.

After getting the older version to Run, I used drag and drop to install the latest version 5.07.01b0 and it now runs ??????

F#$@%*

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phil99

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Posted: 01:01am 04 Mar 2023

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Just a guess.
Perhaps the latest firmware is missing something that sets the chip up for use by MMBasic. So upgrading from an older version works if that something is retained through the re-flash.

KeepIS

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Posted: 01:02am 04 Mar 2023

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Just did the 2nd board with Links removed and running on a 9" display, backpack, SD card etc. Works like a dream, full code running no errors.

One full day wasted

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KeepIS

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Posted: 09:11am 04 Mar 2023

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Both boards draw 90 mA from Vbat pin ????, battery goes flat pretty fast. Yes Vbat Link is disconnected and verified as the correct link.

Why does MMBasic with options set disappear if the battery is flat.

I can power on and off without battery and MMbasic on its own holds.

If I set options and cycle power MMbasic is gone.

I seem to recall something about settings saved in RTC memory ?

I also have to load version 5.05.11 before loading 5.07.01b otherwise the later version will not communicate over console.

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disco4now

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Posted: 09:44am 04 Mar 2023

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KeepIS said
If I set options and cycle power MMbasic is gone.

Does 'gone' mean you can't talk to it anymore, presumably the firmware is still in the flash, just not talking.

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KeepIS

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Posted: 09:57am 04 Mar 2023

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Yes it appears you can't talk to it.

However, this high current on the Vbat battery is only there under certain conditions where MBasic has hung or the options are corrupted. I have to figure out which.

It means that a good battery will go flat in a matter of minutes in this high drain condition, once everything is running the current is Vbat virtually nothing.

I proved this by powering the Vbat with a small flat Li-ion rechargeable and a 470 ohm in series to limit current, it allowed me to get this thing running without flattening a tiny battery in the process and causing no end of stupid symptoms. Once running it's happy.

Note: I must program the old version of MMBasic First, otherwise there is no way to get a console connection with the later version installed. Works 100% every time.

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KeepIS

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Posted: 10:04am 04 Mar 2023

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A further test has reveled the vbat current rises to 90ma when the Power (5V) is removed. It drops back to almost zero once the H7 powers up and is running. No wonder it stops working when powered off for a few minutes on a coin battery.

Again YES SB52 has been removed and I confirmed that one side is connected to the vbat pin and SB52 is completely open and isolated from the normal System vbat supply.

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JohnS
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Posted: 10:04am 04 Mar 2023

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KeepIS said Both boards draw 90 mA from Vbat pin ????, battery goes flat pretty fast. Yes Vbat Link is disconnected and verified as the correct link.

Why does MMBasic with options set disappear if the battery is flat.

I can power on and off without battery and MMbasic on its own holds.

If I set options and cycle power MMbasic is gone.

I seem to recall something about settings saved in RTC memory ?

I also have to load version 5.05.11 before loading 5.07.01b otherwise the later version will not communicate over console.

Sounds like a clear-all-the-flash process would be worthwhile.

For the picomite we have Clear_Flash.uf2 - is there an equivalent for your board? Or you can do it via tools such as STLink / OpenOCD.

The disappearing MMBasic: a floating input on a critical pin? (Possible?)

John

KeepIS

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Posted: 10:24pm 04 Mar 2023

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Hi John, I've done that a few times but I'm going to try it all again today.

This high current Vbat under certain conditions is puzzling, want to do more test on that as well.

matherp said The later HAL library fixed a bug in the RTC drive current. One possibility is you have a higher capacitance crystal on the RTC. The Nucleo is 6pF and the firmware is targetted for that. Try reducing the load capacitors on your RTC crystal

Could this still be part of the problem with the New boards and the reason for the high Vbat current? There are no caps connected to the 32.768KHz xtal. Circuit says DNF.

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