Init of FlexBus pins in SDRAM mode

peterruesch — Fri, 07 Aug 2015 09:58:06 GMT

Hi,

I'm trying to get the external SDRAM on the TWR-K65 working using KDS and PE.

After comparing various register settings in the initialization phase with AN5095SW I realized that I need to change the FB_CSPMCR value to get the SDRAM working.

The generated pin init code for the SDRAM contains a section for setting the FB_CSPMCR but unfortunately the values listed there are leading to a non functional SDRAM.

I can't find a entry in the PE SDRAM component to edit these values.

All I can do is add the FB component and change it there, but this is not what i want.

So my question: How can i control the FB muxing in the SDRAM component in Processor Expert to generate the parameters like described in the code sample below ?

The function in question is init_sdram_pins().

void init_sdram_pins(uint32_t instance)
{
  /* Affects PORTD_PCR4 register */
  PORT_HAL_SetMuxMode(PORTD,4UL,kPortMuxAlt5);
...
  FLEXBUS_HAL_SetMultiplexControlGroup2(FB, kFlexbusMultiplexGroup2_FB_TSIZ0);      
  FLEXBUS_HAL_SetMultiplexControlGroup3(FB, kFlexbusMultiplexGroup3_FB_TSIZ1);      
  FLEXBUS_HAL_SetMultiplexControlGroup4(FB, kFlexbusMultiplexGroup4_FB_CS2);      
  FLEXBUS_HAL_SetMultiplexControlGroup5(FB, kFlexbusMultiplexGroup5_FB_CS3);
...
}

must be changed to

void init_sdram_pins(uint32_t instance)
{
  /* Affects PORTD_PCR4 register */
  PORT_HAL_SetMuxMode(PORTD,4UL,kPortMuxAlt5);
...
  FLEXBUS_HAL_SetMultiplexControlGroup2(FB, kFlexbusMultiplexGroup2_FB_BE_31_24);
  FLEXBUS_HAL_SetMultiplexControlGroup3(FB, kFlexbusMultiplexGroup3_FB_BE_23_16);
  FLEXBUS_HAL_SetMultiplexControlGroup4(FB, kFlexbusMultiplexGroup4_FB_BE_15_8);
  FLEXBUS_HAL_SetMultiplexControlGroup5(FB, kFlexbusMultiplexGroup5_FB_BE_7_0);
...
}

Re: Init of FlexBus pins in SDRAM mdoe

Alice_Yang — Mon, 10 Aug 2015 02:21:37 GMT

Hello Peter,

(1) You use which version of KDS ? And you use the PE or SDK_PE ? please screenshot your component of project .I will configure it on my side.

(2) And you can do as this, after your change the code manually, then select "Don't Write Generated Component Modules",

the code will be you want .

Hope it helps

Alice

Re: Init of FlexBus pins in SDRAM mdoe

marek_neuzil — Mon, 10 Aug 2015 11:46:38 GMT

Hello Peter,

This is known issue of Processor Expert that will be fixed in the next release. There is also available a hot fix for this issue, see the attached archive.

Re: Init of FlexBus pins in SDRAM mdoe

peterruesch — Mon, 10 Aug 2015 12:15:34 GMT

thank you guys.

Good to know you are already looking into it.

What other fixes will the upcoming release contain?

best regards

topic Re: Init of FlexBus pins in SDRAM mdoe in Processor Expert Software

Init of FlexBus pins in SDRAM mode

Re: Init of FlexBus pins in SDRAM mdoe

Re: Init of FlexBus pins in SDRAM mdoe

Re: Init of FlexBus pins in SDRAM mdoe