Programming with GPIO's

[SpeedlessAustralia]

Hi working through the application notes, doc Visi GPIO PINS at page 10 if provides sample code to activate gpio pins

I have tried naming the pin GPIO_1, IO_1, GPIO1_PIN, IO1_PIN

The compiling error message is

Error: 'INPUT' not found (line 517 file:SpeedlessTest6.4dg)
Error: context error for unknown 'INPUT' (line 517 file:SpeedlessTest6.4dg)


Here is the code i have

func main()
gfx_ScreenMode(LANDSCAPE) ;
disp_SetReg(SSD1963_SET_ADDRESS_MODE, 0x09); // flip vertically from landscape only, different values can flip Portrait, Portrait_R and Landscape_R

pin_Set(INPUT, GPIO1_PIN)

repeat
if(pin_Read(GPIO1_PIN == 1)
print("ON \r");
gfx_CircleFilled(120,200,100,RED);
else
print("OFF\r");
gfx_CircleFilled(120,200,100, DARKRED);
endif
forever

[ESPsupport]

Put the cursor under pin_set and press F1

[SpeedlessAustralia]

Thanks for that reference however i still cannot see what i am doing wrong as i am following the instructions as per example in screen shot.

Also not sure if its relevant i am using 4D UPA for the pins

[SpeedlessAustralia]

also on the section re pins its what i have highlighted in screenshot below a typo

[Juniel Cruz]

Good day!

Thanks for notifying us about this. We'll take note of this for the next document update.

I'm not sure if you've noticed this already but I might as well point it out. See that there is no INPUT keyword used for the first parameter of the function pin_Set.

The issue you first had is as the error message said "Error: 'INPUT' not found"

[Juniel Cruz]

In your case, you'd want to use PIN_INP

[SpeedlessAustralia]

Hi just to put you in the picture what i am ultimate wanting to achieve is when the digital input on gpio1 is high then the screen displays form1 and when its low it displays form0 being the default screen

[SpeedlessAustralia]

Hi

Can you please confirm for me that i am FINALLY on the right track ??

i needed to assign the values for the mode and pin number not the "text description"

so to assign the pin as input its mode value is 0 as per that table
the pin number needs to gust reference the number as a value not the "GPIO1"


pin_Set(0, 1); // set pin 1 as input ( 0 = input mode and 1 is the pin number )
pin_LO(1); // set the digital input 1 to default as low

repeat
if(pin_Read(1) == 0)
print("ON \r");
gfx_CircleFilled(120,200,100,RED);
else
print("OFF\r");
gfx_CircleFilled(120,200,100, DARKRED);
endif
forever

[Juniel Cruz]

Hi,

You don't need to use the values. The pin names and modes are predefined so you only need to use the right keywords.

For pins, you can refer to the column headings (PA0 to PA15).
For modes, you can refer to the row headings (PIN_INP, PIN_INP_HI etc).

Best Regards,

[James_4DSystems]

To add to this, if you are using the 4D-UPA, and you are using the names off the bottom of the UPA itself for the GPIO, in the code - then this is not correct.
As Juniel said above, the pin names for the functions are in reference to the processor. The GPIO names on the bottom of the 4D-UPA are generic as there are multiple devices that can use those GPIO pins, PICASO, Diablo16, etc. You need to look at the Datasheet for the 4D-UPA also, and cross reference what the GPIO name is on the 4D-UPA vs what pin it goes to on the Diablo processor.

So if you are trying to use GPIO1 on the bottom of the 4D-UPA, then the Diablo16 pin is PA3 as per the table from the 4D-UPA datasheet.

[SpeedlessAustralia]

Wow ok have all that, would never jade figured out that on my own much appreciated