Hello kerryzhou,
When I debug the code in the IDE, the whole screen shot is shown below.
Yes, I can run to line 53. But once I run from line 55 to line 57, the fault happen.
When the fault happen, the whole screen shot is shown below.
Thanks!
Hello kerryzhou,
Thank you for taking the time to help me solve my problem.
In my test, I created a new C project with additional "flexspi" driver.
In order to operate my project in flash, I didn't tick "Link application to RAM". Since I want to store my audio data to flash, I decorated "FLEXSPI_Init()" function definition which is defined in "fsl_flexspi.h" using "__RAMFUNC", as shown in the following formula:
__RAMFUNC(RAM) void FLEXSPI_Init(FLEXSPI_Type *base, const flexspi_config_t *config);
When I built this project with above formula, there are many errors in "fsl_flexspi". As shown below:
All errors are like "declaration for parameter 'FLEXSPI_Init' but no such parameter", "declaration for parameter 'FLEXSPI_GetDefaultConfig' but no such parameter". Is it because the way I declared is wrong?
Other than that, since in this test I only used "FLEXSPI_Init()". If I want to use other flexSPI functions, how do i modify?
Thank!
Thanks for your updated information.
Please read MCUXpresso_IDE_User_Guide.pdf which is located in your IDE install path:
C:\nxp\MCUXpressoIDE_11.1.0_3209
Chapter 17.13.5 Placing specific functions into RAM Blocks
You need to add the header file:
This placement is controlled via macros provided in a header file which can be pulled into your
project using:
#include <cr_section_macros.h>
I did a simple test:
It builds without error, do you add the related header file?
Kerry
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Hello kerryzhou,
Thank you for taking the time to help me solve my problem.
I found that I put that header file in the wrong place causing the problem to occur.
Now I can build my project without error, but it still have some problems when debugging. As shown below:
It still stop at "FLEXSPI_Init()" and have a hard fault. Dose this mean that I still operation the flash in the flash? But I found that "FLEXSPI_Init" function is indeed in the RAM, As shown below:
"0x20000000" is the address in the RAM, as shown below:
If I want to use some basic function like reading and storing memory, Do I need to decorate all functions which are defined in "fsl_flexspi.h" using "__RAMFUNC"?
Thanks!
Hello kerryzhou,
I think that it doesn't enter to main.
My main code has "PRINTF("Hello World\r\n")", but It doesn't print "Hello World" and the fault happens. As shown below:
Thanks!
Hello kerryzhou,
I mean that I can save my code and data in my board even if my board has no electricity. Since the code and data which are saved in the RAM are lost when there is no electricity.
As shown below. Whether the "flexspi_nor_polling_transfer" example is ticked "Link application to RAM" or not, it can still run successfully. Is their different in that the code and data are stored in the RAM or the FLASH?
Tick "Link application to RAM":
Non-tick "Link application to RAM":
But when I create a new code to test flexSPI, it can only run successfully on RAM. If I don't tick "Link application to RAM", the code always has a fault.
If you have time, could you teach me why is there such a difference?
Other than that, since I want to use SAI to record the sound and save a short audio data, I need a big size memory like FLASH to store audio data. Is the flexSPI necessary? Or is there any other way to solve this problem?
Thanks!
Hello , thanks for your reply.
As you said, all the driver is based on the C. I have tried using C to test flexspi, but it still has some problems. As shown below.
In this test, I use MCUXpresso IDE, and just create a new C project with default board files. When I add flexspi to peripheral drivers, the problems arise. Once I disable flexspi, It's perfectly fine. As shown below.
If you have time, could you teach me how to know my code is downloaded to the internal RAM or external flash?
Thanks!
I have created one new project, and all add the flexSPI, I can debug it without problems.
put the code in the internal RAM, please do the following configuration:
I also attach my new created project.
If you want to add the detail flexSPI operation, please refer to the flexspi_nor_polling_transfer project.
Kerry
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