Arduino for STM32

refactor getClkFreq, SPIDMA use generic getClkFreq from SPIBasic
https://github.com/ag88/stm32duino_spi_ ... A.cpp#L300

updated SPI.h
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPI.h


added externs to SPI instance (this defaults to SPI 1)
SPIDMA classes are different for each series and SPIDMA uses a different/specific class for each SPI peripheral.
Typedefs are defined for SPIClass1, SPIClass2 ...

https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIClass.h
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIClass.cpp
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIBasic.h
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIBasic.cpp ...

if you are using Arduino_Core_STM32
https://github.com/stm32duino/Arduino_Core_STM32/wiki
https://github.com/stm32duino/Arduino_Core_STM32/

you can try using the HardwareTimer
https://github.com/stm32duino/Arduino_Core_STM32/wiki/HardwareTimer-library
e.g.

HardwareTimer *MyTim = new HardwareTimer ...

added stm32f3
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIDMA_F3XX.h
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIDMA_F3XX.cpp

again, this is based on using one variant as example to make the codes, untested codes, just compiled.

STM32F3 DMA is closer to F1 ...

I did a refactor for SPIDMA to make 2 different implementations of single buffer transfer

In the Arduino SPI API, buffer transfer is provided for only a single buffer
https://docs.arduino.cc/language-reference/en/functions/communication/SPI/transfer/

SPI transfer is based on a simultaneous send ...

added stm32h5
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIDMA_H5XX.h
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIDMA_H5XX.cpp

again, this is based on using one variant as example to make the codes, untested codes, just compiled.

stm32h5 spi peripheral is ...

LVGL Light and Versatile Graphics Library
https://lvgl.io/
https://github.com/lvgl/lvgl

ok, this should probably be in off-topic or perhaps Ideas section. But posting here (at least for a while) as I stumbled into this.
my thoughts are going full gui is likely difficult to run on the resource ...

if you don't need too much speeds, well you could do codes like



uint8_t state = 0;

void setup() {
pinMode(PA1, INPUT);
Serial.begin();
}

void loop() {

if (digitalRead(PA1) != state)
Serial.println("state changed");
state = digitalRead(PA1);
delay(100);
}


and you can replace that ...

added stm32h7
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIDMA_H7XX.h
https://github.com/ag88/stm32duino_spi_dma/blob/main/src/SPI/SPIDMA_H7XX.cpp

again, this is based on using one variant as example to make the codes, untested codes, just compiled.

stm32h7xx has both variations ...