MC9S12XEP100 SPI function

Iko — Thu, 29 Oct 2020 08:57:20 GMT

Hi all
I have some difficult with the SPI...
I havealready made some on colfire or HCS08 without problem...

// Configuration
// Bus clock = 48MHZ.
// We want SPI: 4MHz, Master mode, without drive of SS.

SPI1CR1 = 0b01010000 ;
SPI1CR2 = 0b00001000 ;
SPI1BR = 0b01010000 ;

//Function Send

U8 mcubind_Spi_8_bits_Send(U8 data)
   {
   debug_spi_data = data ;
   while(SPI1SR_SPTEF==0)
      {
      } 
   spi_msg_count ++ ;
   SPI1DRL = data ;
   while(SPI1SR_SPIF==0)
      {
      }  
   return SPI1DRL  ;
   }

For the test, I made an infinit while() where i send 0x55.
(normaly, I'll have 4MHz div by 2).

But i have nothing.

I can see my counteur change, but i have nothing on MOSI1 or SCK1...
In addition, SPI1DRL always egal 0xff...

Do you have any ideas?

Re: MC9S12XEP100 SPI function

Iko — Fri, 08 Oct 2010 16:50:16 GMT

Oups...

I have my answer ^^

My signal aren't routed on the right pins (SPI1 on PP0/1 OR on PH0/1)...

I'm Working on the Demoboard....

See ya .

S12 / MagniV Microcontrollers中的主题 MC9S12XEP100 SPI function

MC9S12XEP100 SPI function

Re: MC9S12XEP100 SPI function