How to use SPIMASTER_LDD for MQX 4.0

[venkateshgr]

Hi All,

Am trying to use PE based SPI driver for MQX 4.0,

Following are the steps i have followed

1.Am using codewarrior 10.3 and added bsp_twrk60n512  to the project.

2.Added SPIMASTER_LDD component to processorExpert.pe

3. Done configuration settings for SPI and selected the ports.

4.Generated code for processorExpert.pe

Please guide me what are the furture steps to be done in order to use the PE based driver in MQX 4.0 rather than using the driver provided in peripherals IO's->spi

[venkateshgr]

Hi,

Can you please confirm if the PE LDD based generated code supports for multi threaded environment in MQX 4.0.0 or it supports only for baremetal?

GR.Venkatesh

[venkateshgr]

Hi,

Am in process of using the PE generated API's of UART. In case of the existing driver there are task handling in case of UART block read in serl_int.c file in the following API

_io_serial_int_read()

if(flags & IO_SERIAL_NON_BLOCKING) {

          if (_CHARQ_SIZE(in_queue) == 0) {

              num -= i;

              _int_enable();

              break;

          } /* Endif */

      } else {

          while (_CHARQ_SIZE(in_queue) == 0) {

            _taskq_suspend(int_io_dev_ptr->IN_WAITING_TASKS);

          } /* Endwhile */ 

      } /* Endif */

In case of the generated UART driver how to handle the tasks. In there any methods to be enebled during generating the code?

Am facing problem in executing the task from which the uart receive task is created.

[venkateshgr]

Hello,

I have already used the standard BSP drivers and working fine, now need to completely remove BSP drivers and use PE based drivers.

So you mean to say the existing io_read an ioctl's are compatible for non PE based only and not in case of using PE driver need to write wrappers and use on io_read write or directly use the PE driver APIs?

[LuisCasado]

Hi

BSP drivers are independent of PE LDD drivers. You have to use the PE methods directly in the same way you work with MQX Lite that doesn't have standard drivers. You don' t need ioread,open, ctl, etc

Luis

[venkateshgr]

Hi,

Ok thanks Luis. I never used MQX Lite. But i got the point from your previous reply that I need to use the generated API's from PE_LDD in place of all IOCTL calls to driver and open() and read write calls.

Am i right with my understanding?

GR.Venkatesh

[LuisCasado]

Hi,

Yes, correct. In the same way are used the LDD_xx in  C:\Freescale\Freescale_MQX_4_0\doc\tools\cw\FSL_MQX_in_CW_10_x.pdf

regards,

[venkateshgr]

Hi,

Thanks, I checked with that previously. Am trying to use generated Uart and SPI driver into Httpdsrv rtcs app. So wanted to know if calling the io_read() API will do the read from UART or do i need to use the API generated from PE in place of io_read() call.

[LuisCasado]

Hello,

I would recommend to use the standard MQX BSP drivers by default (UART, SPI,..) In case you don't have a particular driver or particular functionality in the driver, to use LDD_xx driver with PE.

Check the MQXIOUG.pdf for driver functions and in the folder C:\Freescale\Freescale_MQX_4_0\mqx\examples you have examples of using MQX drivers (non PE). For example spi driver C:\Freescale\Freescale_MQX_4_0\mqx\examples\spi UART driver is used in many of those projects,

So you have two options, standard MQX driver or LDD_ PE driver, but you shouldn't mix them for a peripheral.

Luis

[venkateshgr]

Hi,

I have done with setting the methods and generating code for SPIMaster_LDD.

1. In order to initialize the driver do i need to call directly the Init() from generated code or by calling fopen or any other IOCTL?

2. Does the ioctl or fopen call internally calls the API's from generated code or do i need to use independently  the API's generated generated for example for read and write?

[LuisCasado]

Hello,

Please, check the document : C:\Freescale\Freescale_MQX_4_0\doc\tools\cw\FSL_MQX_in_CW_10_x.pdf

You have examples of using LDD_xx driver.

Regards,

Luis

[jch]

Hi,

I think you are new user of the PE, so the next steps you need to do is just switch to the Methods tab select what methods you want to use. Generate the PE code. Then use the methods in your code. That's all. Any other questions?