[STM32GENERIC] F429i Discovery

aren’t those from the library.properties file ?
add ‘,stm32’ to the architectures line
stephen

it’s case sensitive maybe we could add ‘,STM32’ in the library.properties
Fine if it’s both compatible. That’s why I would like one repo for each lib and not integrate it in the core

Because daniel has meanwhile done some work for the F429 disco, I added a TFT voltmeter example.

It reads the voltage from PA0 and displays it. PA0 is connected to the blue button of the board. I you press the button the displayed voltage changes to 3.3V.
I have tried other pins e.g. PA1 but there seems to be a driver problem. PA1 shows always ‘0’.

I tried to find the touch controller which should be connected to I2C3 with the scanner.
But it does not respond. So either there is a fault in my scanner configuration or there is a problem with the I2C3 implementation.
Because I tried to measure the I2C3 signals wiht the oscilloscope on PA8 and PC9 and there where no signaIs, I think there is a problem with the I2C implementaion

Anny idea?:

#include <Wire.h>

#define SERIALINTERFACE Serial

void setup()
{
//Wire.begin();
Wire.stm32SetInstance(I2C3);
Wire.stm32SetSDA(PC9);
Wire.stm32SetSCL(PA8);

//enableDevices();

SERIALINTERFACE.begin(115200);
delay(5000);
SERIALINTERFACE.println("\nI2C Scanner");
}

void loop()
{
byte error, address;
int nDevices;

SERIALINTERFACE.println("Scanning...");
delay(2000);

nDevices = 0;
for (address = 1; address < 127; address++ )
{
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
Wire.write(0);
error = Wire.endTransmission();

if (error == 0)
{
SERIALINTERFACE.print("I2C device found at address 0x");
if (address < 16) SERIALINTERFACE.print("0");
SERIALINTERFACE.print(address, HEX);
SERIALINTERFACE.println(" !");

nDevices++;

}
else if (error == 4)
{
SERIALINTERFACE.print("no device found at address 0x");
if (address < 16) SERIALINTERFACE.print("0");
SERIALINTERFACE.println(address, HEX);
}
}
if (nDevices == 0)
{
SERIALINTERFACE.println("No I2C devices found\n");
SERIALINTERFACE.println("Did you configure the chip select for your device?\n");
}
else
SERIALINTERFACE.println("done\n");

delay(5000); // wait 5 seconds for next scan
}

In the same line that the ChrisMicro question, about the F429I-DISCO board:

Is it possible to remap the full GPIO with STM32CubeMX in order to activated I2C2, I2C3, SDIO, SPI4, SPI5 or SPI6 for example?

1. Is it an already existing library that is not written by you, that is dumb and only knows about the first instance of Wire?
void setup() {
Wire.stm32SetInstance(I2C3);
Wire.stm32SetSDA(PC9);
Wire.stm32SetSCL(PA8);

DumbLibrary.begin(); // dumb library does not know that the chip has multiple I2C, and thinks there is only Wire. What a shame... READ THE LIBRARY DOCUMENTATION
// THE PREVIOUS LINE WILL CALL Wire.begin() !!!
}

Chris you forgot to call Wire.begin()
Damn it .. I looked 10 times and didn’t see

But thanks
Here I made the new TFT touch screen example

Because I had a little time, I made an I2S example.
It seems, that all pins are somehow shared with other Peripherals. The I2S works, but I found only a solution where the TFT can not be used:
https://github.com/ChrisMicro/STM32GENE … overy429ZI

I added also an oscilloscope example in the TFT folder.