LPC MicrocontrollersのトピックLPC844 SPI clock

LPC844 SPI clock

tyassin1 — Sun, 11 Apr 2021 11:21:04 GMT

I am using the LPC844 and the SDK

According to the manual it is needed to enable the clock source through the register: SPI0CLKSEL.

However I cannot find this register anywhere. Where is it possible to enable the clock for SPI0?

Thank you

Re: LPC844 SPI clock

Alice_Yang — Mon, 12 Apr 2021 09:46:00 GMT

Hello tyassin1,

The register of "SPI0CLKSEL" is included in FCLKSEL[11];

You can configuration the SPI clock through as below code in SDK:

/* Attach main clock to SPI0. */
CLOCK_Select(kSPI0_Clk_From_MainClk);

BTW, recommend you refer to the SPI demo under SDK for lpc845MAX board.

Alice

Re: LPC844 SPI clock

tyassin1 — Wed, 14 Apr 2021 06:19:49 GMT

Hi Alice,

OK I See.

So it is just how the SDK is implemented. I can see in the SDK that there are dedicated I2CnCLKSEL and UARTnCLKSEL for I2C and the UART, but the SPI has to use this FCLKSEL register?

Thank you.

Re: LPC844 SPI clock

Alice_Yang — Thu, 15 Apr 2021 09:50:29 GMT

Hello tyassin1,

I also have same doubt as you , any way, it can work.

Alice