F103Zx support

[fpistm]

Add Generic F103Zx support and VCCGND_F103ZET6 (Mini)

I have not this boards so if someone could do some tests that's would be fine.
Thanks.

[fpistm]

@dds90 could you test this please?

[dds90]

Hi @fpistm,
thanks for your contribute.

At the moment I've tested some peripherials in VCCGND_F103ZET6 (Mini):

• SD seems work correctly
• The Analog pins connected to ADC2 and ADC3 lock the Serial
• Second and Third serial not work yet.

[fpistm]

How did you test the other serial ?

[dds90]

Like this:

void setup() {
Serial.begin(19200);   // on PA9 PA10
Serial2.begin(19200);  // on PA3 PA2
Serial3.begin(19200);  // on PB11 PB10

Serial.println("Serial");
Serial2.println("Serial2");
Serial3.println("Serial3!");
}

void loop() {
}

[fpistm]

That's what I thought.
By default only one Serial instance is instantiate.
In this case Serial1 using USART1 on PA10/PA9.

To use other Serial you have to instantiate them:

HardwareSerial Serial2(PA3, PA2);
HardwareSerial Serial3(PB11, PB10);

[dds90]

Thanks again.
With your code and only Serial and Serial2 work well.
But when I add the Serial3 instance , it send only one character, and Serial and Serial2 send only two characters.

[fpistm]

@dds90
I've tested with a VCC GND F103ZE and all Serials works.

[dds90]

@fpistm
Please can you share your testing code?
Did you tested the the analog pins also?

[fpistm]

This is the same than the one you provided adding the fix I gave you. ADC is working except ADC3 which is a know issue

[fpistm]

HardwareSerial Serial2(PA3, PA2);
HardwareSerial Serial3(PB11, PB10);

void setup() {
  Serial.begin(19200);   // on PA9 PA10
  Serial2.begin(19200);  // on PA3 PA2
  Serial3.begin(19200);  // on PB11 PB10

  Serial.println("Serial");
  Serial2.println("Serial2");
  Serial3.println("Serial3!");
}

void loop() {
}

[dds90]

Many thanks!
For the serials i retry as soon as possible. For the ADC are there any chances to fix this issue?

[fpistm]

For the serials i retry as soon as possible. For the ADC are there any chances to fix this issue?

Only ADC3 is not working ADC1 and 2 works fine anyway, I have currently no clue. As a workaround I will comment all ADC3 in the PeripheralPins.c

[dds90]

I confirm that all serials are ok.
In the previously test, i wrong to add the instances in to the setup function.

The pins from PF_6 to PF_10 can't remap to another ADC. Where did you read the ADC3 issue?

[fpistm]

On the forum one member told that ADC3 doesn't work.Then I confirm, there is the same issue with Rogers's core.

[dds90]

Is there the possibility that it is a bug in the STM32F1 series?

[fpistm]

@dds90

Is there the possibility that it is a bug in the STM32F1 series?

Well, currently I don't know. All is possible anyway, the STM32F1 serie is old then I guess this kind of issue would be report in the errata sheet. So, we will investigate.

[dds90]

@fpistm
Do you think it is necessary to open a new issue?

[fpistm]

Issue is fixed.

[dds90]

Oh, sorry.
Thank you very much!