how to use STM32PAR8 dataBus?

[liyang5945]

I have a STM32H750 dev board and a 8bit 8080 LCD，I use Arduino_SWPAR8 dataBus like this ,it works，but it's too slow

Arduino_DataBus *bus = new Arduino_SWPAR8(
        PE10,PE11,PE13,PE12,
        PA0,PA1,PA2,PA3,PA4,PA5,PA6,PA7
);

I try to use STM32PAR8 dataBus

Arduino_STM32PAR8::Arduino_STM32PAR8(int8_t dc, int8_t cs, int8_t wr, int8_t rd, GPIO_TypeDef *port)
    : _dc(dc), _cs(cs), _wr(wr), _rd(rd), _port(port)
{
}

It makes me confused, I don't how to setup the data pin，could you give me some advice?

[moononournation]

You are using GPIO port A pin 0-7 for the 8-bit data, so you can pass the PORTA to last parameter.

[liyang5945]

I pass the last parameter with PortA or PORTA，the code can't compile success，I change the parameter to GPIOA or GPIOPort[PortA], the code can compile success，but dosen't work,the screen got nothing,I have two 8bit LCD screen，ST7796 and HX8352B，both can't work

[moononournation]

@monte-monte

[monte-monte]

Arduino_DataBus *bus = new Arduino_STM32PAR8(PB7 /* DC */, PB4 /* CS */, PB6 /* WR */, PB0 /* RD */, GPIOA /* PORT */);

That's what I use in my sketch and it works.

[liyang5945]

Arduino_DataBus *bus = new Arduino_STM32PAR8(PB7 /* DC */, PB4 /* CS */, PB6 /* WR */, PB0 /* RD */, GPIOA /* PORT */);

That's what I use in my sketch and it works.

what dev board do you use?

[monte-monte]

@liyang5945 bluepill