Which resources does the TV HAT use?

[erichabg]

Hello,
Which resources (GPIO's) does the new TV use?
Or to put it another way, which GPIOs are still available for other applications?

Regards
Erich

[rpdom]

As I understand it, it uses the SPI port and the HAT ID I2C connection and that's all.

[scotty101]

Would be good if someone who knew what pins were used would raise a pull request on https://pinout.xyz/

[6by9]

https://github.com/raspberrypi/linux/bl ... verlay.dts

Code: Select all

	fragment@0 {
		target = <&spi0>;
		__overlay__ {
			/* needed to avoid dtc warning */
			#address-cells = <1>;
			#size-cells = <0>;

			status = "okay";

			spidev@0 {
				status = "disabled";
			};

			cxd2880@0 {
				compatible = "sony,cxd2880";
				reg = <0>; /* CE0 */
				spi-max-frequency = <50000000>;
				status = "okay";
			};
		};
};

So SPI0 with CE0.
Being a HAT it will have an ID EEPROM to trigger the loading of this overlay.

[art51go]

I wanted to combine my pi tv hat with a Hifiberry AMP2, all stacked together with an adafruit extra tall header (ada1979) on a raspberry pi 4. The sound works but the /dev/dvb/ device is not there (worked without the sound board)

The Hifiberry AMP2 uses (https://www.hifiberry.com/docs/hardware ... ry-boards/):

GPIO 2-3: I2C
GPIO 4: Mute
GPIO 18-21: PWM0 and second SPI

I do not understand, why this does not work together, if the TV Hat only uses the first SPI. Would be nice to find information about these boards on https://pinout.xyz/boards#

[trejan]

I do not understand, why this does not work together, if the TV Hat only uses the first SPI.

The two HAT ID EEPROMs used for autoconfiguration will conflict as you're not meant to stack HATs. Try loading the rpi-tv overlay manually?

[DougieLawson]

It uses I2C0 (GPIO0 SDA/GPIO1 SCL) and SPI0.0 (GPIO10 MOSI/GPIO9 MISO/GPIO11 CLK/GPIO8 CE).