LAUNCHXL-F280039C: F280039C drives LP5891 LED driver IC

Hi Wang,

Are you using SPI or CAN on the F28003x device on GPIO60 and GPIO61? Can you point out any specific misbehavior on these pins besides noticing the LED is not behaving as expected? This forum is for F28 device questions so we may not be able to assist with understanding the protocol expected by the LP5891.

Thank you,

Luke

GPIO60 和 GPIO61 使用 SPI。GPIO60 是 SPI-MOSI。GPIO61 是 MISO。F280039C 與 LP5891 一起使用以驅動 LED。嘗試用 F280039C 的 EVB 板推動 LED 是正常的。但是我設計的用於驅動 LED 的電路會閃爍

Hi Wang,

Please post your reply in english.

Thank you,

Luke

Hi Luke,

GPIO60 and GPIO61 use SPI.

GPIO60 is SPI-MOSI.

GPIO61 is MISO. the F280039C is used with the LP5891 to drive LEDs. trying to drive LEDs with the EVB board of the F280039C works fine.

However, the circuit I designed to drive the LED flickers.

Does F280039C drive the LEDs correct or is this done by the LP5891? If done by the LP5891, have you checked the datasheet to see what pins might cause the LED to not get driven properly?

Hi Luke

I have found the problem and solved it, thank you for your help