topic Re: K70+LCDC+USB in Kinetis Microcontrollers

K70+LCDC+USB

PRJOY — Wed, 27 Jan 2016 10:50:52 GMT

Hello everyone,

I use K70MCU, CW10.6, USB Stack v4.1.1 and LCD-RGB.

When run the demo "USB Stack->Host->Example->Printer" under CW , it is work fine.

While when i enable the bellow settings for speed up the LCD-RGB display update rate, but USB is not working.

// turn code cache on

LMEM_PCCCR = (LMEM_PCCCR_GO_MASK | LMEM_PCCCR_INVW1_MASK | LMEM_PCCCR_INVW0_MASK | LMEM_PCCCR_ENWRBUF_MASK | LMEM_PCCCR_ENCACHE_MASK);

while( LMEM_PCCCR & LMEM_PCCCR_GO_MASK ){};

// turn system cache on

LMEM_PSCCR = ( LMEM_PSCCR_GO_MASK | LMEM_PSCCR_INVW1_MASK | LMEM_PSCCR_INVW0_MASK | LMEM_PSCCR_ENWRBUF_MASK | LMEM_PSCCR_ENCACHE_MASK);

while( LMEM_PSCCR & LMEM_PSCCR_GO_MASK ){};

// Enable IPF/DPF/IC/DC

FMC_PFB01CR ^= 0x00000001F;

FMC_PFB23CR ^= 0x00000001F;

// Enable IPF/DPF/IC/DC

FMC_PFB01CR |= 0x00000001F;

FMC_PFB23CR |= 0x00000001F;

Is there any settings to handle to speed up the LCD-RGB display update rate with out disturbing K70 USB-Host.

Thanks,

Prabhu.S

Re: K70+LCDC+USB

kerryzhou — Thu, 28 Jan 2016 07:46:00 GMT

Hi PRJOY,

Please tell me where you setting the code in the USB host example code?

I think you can try to configure these code after the USB initialization is OK, and test it again.

Besides, you can configure the interrupt priority, make the USB interrupt priority higher than the LCD update priority.

Wish it helps you!

If you still have question, please contact with me!

Have a great day,

Jingjing

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Re: K70+LCDC+USB

PRJOY — Sat, 30 Jan 2016 11:37:35 GMT

Hi Jingjing Zhou,

Thanks for the reply.

Now i tried USB-Host Task only with cache on setting and removed display task (LCD-RGB).

I followed your instructions(configure cache on setting code after the USB initialization), still usb (interrupt) is not getting.

Please help me on this

In my application ".data + .bss" section is greater than 128kb, so i mapped ".data + .bss" section into the external DDR memory

/* Specify the memory areas */

MEMORY

{

m_interrupts (rx) : ORIGIN = 0x00000000, LENGTH = 0x1E8

m_cfmprotrom (rx) : ORIGIN = 0x00000400, LENGTH = 0x10

m_text (rx) : ORIGIN = 0x00000800, LENGTH = 1M - 0x800

m_data	(rwx) : ORIGIN = 0x70000000, LENGTH = 11M
m_data2	(rwx) : ORIGIN = 0x70B00000, LENGTH = 1M

}

Thanks,

Prabhu.S

Re: K70+LCDC+USB

kerryzhou — Mon, 01 Feb 2016 03:17:35 GMT

Hi Prabhu.S，

Please attached your modified printer.c, I want to check it.

Waiting for your reply!

Best Regards,

Jingjing

Re: K70+LCDC+USB

PRJOY — Mon, 08 Feb 2016 12:37:42 GMT

Hi Jingjing Zhou,

Thanks for the reply.