LPC MicrocontrollersのトピックRe: LPC54018 EVK

LPC54018 EVK

Sukumar_M — Wed, 23 Mar 2022 10:10:34 GMT

Here I looking for configuration of SPI. I attached the clock diagram which I get.

Yellow pulse - SCK(clock)

Blue pulse - CS(chip select)

Red pulse -MOSI(data)

both CS and SCK are working fine. while passing data not transfer properly

here I config SPI in 8-bit transmission mode and data passing is 0xff00 but in the pulses of MOSI is not in proper manner how can be rectify.

xiangjun_rong — Thu, 24 Mar 2022 01:22:53 GMT

Hi,

I suppose that your code has issue, could you share your code with us so that we can have a review?

XiangJun Rong

Sukumar_M — Thu, 24 Mar 2022 04:45:24 GMT

Hi,

I am working with 2.4 inch TFT st7789v driver so attach there file also so you can verify this and clarify me.

xiangjun_rong — Thu, 24 Mar 2022 09:35:18 GMT

Hi,

It appears that you do not call the SDK api driver function. For the SPIMaster() function you developed, it appears that the line is incorrect.

base->FIFOWR=0x0E5E0000|txvalue;

You should use:

base->FIFOWR=0x075E0000|txvalue;

Hope it can help you

XiangJun Rong

Sukumar_M — Thu, 24 Mar 2022 10:12:08 GMT

sorry, That Time Only Use These Command .But Now also 0xFF and 0x7F issue. I can

send this data the MOSI can Always enable are Particle time only disable but I Should set MOSI Active High.

any TFT Driver Issue.

xiangjun_rong — Fri, 25 Mar 2022 05:40:47 GMT

Hi,

Okay, I see.

I suppose you get the screenshot of SPI timing with the SPI_MasterTransferBlocking() function.

Because you transfers one byte for each frame, if you use the code:

uint8_t SreBuff[]

assign SreByff array with interleaved 0x00,0xFF,0x00,0xFF...

xfer.txData=SreBuff;

xfer.dataSize=sizeof(SreBuff);

SPI_MasterTransferBlocking(EXAMPLE_SPI_MASTER,&xfer);

Pls have a try.

XiangJun Rong