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by Giovanni
Tue Jun 25, 2019 5:31 pm
Forum: Development and Feedback
Topic: [DEV] STM32G4xx support
Replies: 2
Views: 89

Re: [DEV] STM32G4xx support

Hi,

Perhaps they wanted to keep it as close as possible to the F3, the ADC should be able to do 16 bits by doing oversampling like the one on L4/L4+.

Giovanni.
by Giovanni
Tue Jun 25, 2019 5:26 pm
Forum: STM32 Support
Topic: SPI - lcd interface with ILI9341 driver Topic is solved
Replies: 2
Views: 38

Re: SPI - lcd interface with ILI9341 driver Topic is solved

Hi,

That diagram does not show a normal SPI, for example, it is not possible to insert that single dummy cycle. The STM32 SPI does not even have all those signals.

An option would be to bit-bang it on a GPIO using pal and delays.

Giovanni
by Giovanni
Tue Jun 25, 2019 5:20 pm
Forum: ChibiOS/HAL
Topic: How do we step out of a "lock zone"?
Replies: 1
Views: 29

Re: How do we step out of a "lock zone"?

Look at palDisableLineEventI().

Giovanni
by Giovanni
Tue Jun 25, 2019 5:14 pm
Forum: Development and Feedback
Topic: [NOTES] Multi Core support
Replies: 12
Views: 348

Re: [NOTES] Multi Core support

An IKSP is a nice idea.

There is space for an RTOS IMHO for applications like hypervisors and trust zone, Linux and the rest would run in a VM. You could have Linux and a realtime VM with RTOS.

Giovanni
by Giovanni
Mon Jun 24, 2019 11:01 am
Forum: Development and Feedback
Topic: [NOTES] Multi Core support
Replies: 12
Views: 348

Re: [NOTES] Multi Core support

Not really, the ARM port already runs on Cortex-A, it is a good solution.

Giovanni
by Giovanni
Sun Jun 23, 2019 5:55 pm
Forum: ChibiOS/RT
Topic: Interrupt handling in S state
Replies: 3
Views: 65

Re: Interrupt handling in S state

Hi,

I suggest you step by step through a context switch, this should make it clear.

Giovanni
by Giovanni
Sun Jun 23, 2019 7:17 am
Forum: Development and Feedback
Topic: [VACATION] One Week
Replies: 1
Views: 45

[VACATION] One Week

Hi,

One week vacation for me. I will have limited access but should be able to answer at least once per day.

This is the place :) https://www.google.it/maps/@40.0049272, ... a=!3m1!1e3

Giovanni
by Giovanni
Sun Jun 23, 2019 6:18 am
Forum: Development and Feedback
Topic: [NOTES] Multi Core support
Replies: 12
Views: 348

Re: [NOTES] Multi Core support

Update, the change is mostly complete in the RT7 branch.

Now I need to set up a platform for testing, a dual Cortex-Ax or Cortex-R52 or dual PowerPC. I have access to several but it is automotive stuff not easily available. Suggestions?

Giovanni
by Giovanni
Sun Jun 23, 2019 4:55 am
Forum: STM32 Support
Topic: Put constant value into interrupt vector table
Replies: 2
Views: 68

Re: Put constant value into interrupt vector table

Hi,

You may define a symbol in the .ld file or in the Makefile in the linker options.

IF I remember well:

USE_LDOPT = --defsym=Vectorxx=0xffffffff

Giovanni
by Giovanni
Sat Jun 22, 2019 8:34 pm
Forum: STM32 Support
Topic: GDB debugging.
Replies: 6
Views: 104

Re: GDB debugging.

The HAL ST driver should enable the freeze option by default.

Giovanni

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