Linux/TMDSSK3358: TMDSSK3358 CAN bus

Alvin Chen

Expert 3925 points

Part Number: TMDSSK3358

Tool/software: Linux

Hi Team,

SDK: ti-processor-sdk-linux-am335x-evm-05.02.00.10

I am studying AM335x CAN Bus by AM335X DCAN Driver Guide. I add below code to am335x-evmsk.dts.

dcan1_pins_default: dcan1_pins_default {
	pinctrl-single,pins = <
		AM33XX_IOPAD(0x16c, PIN_INPUT | MUX_MODE2) /* (E17) uart0_rtsn.dcan1_rx */
		AM33XX_IOPAD(0x168, PIN_OUTPUT | MUX_MODE2) /* (E18) uart0_ctsn.dcan1_tx */
	>;
};

&dcan1 {
	status = "disabled";	/* Enable only if Profile 1 is selected */
	pinctrl-names = "default";
	pinctrl-0 = <&dcan1_pins_default>;
};

I try use "ifconfig -a" to check CAN bus，but can't detect CAN bus. Need add CAN transceiver to TMDSSK3358 ?

over 6 years ago

0 Biser Gatchev-XID over 6 years ago

TI__Guru**** 393215 points

Hi,

Your settings are most likely overwritten by the UART0 settings. These pins are dedicated for the debug UART on the Starter Kit. I don't see how you will be able to use them for CAN.

0 Alvin Chen over 6 years ago in reply to Biser Gatchev-XID

TI__Expert 3925 points

Hi,

Thanks for your reply. I will use to BBB test CAN Bus. Can this test without CAN transceiver ?

0 Biser Gatchev-XID over 6 years ago in reply to Alvin Chen

TI__Guru**** 393215 points

Yes, but you will see 3.3V level serial data, not proper CAN differential data. If you have the AM335x GP EVM, it has proper CAN interface with transceiver.

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Linux/TMDSSK3358: TMDSSK3358 CAN bus