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Altera_Forum
Honored Contributor
Honored ContributorHow to use an EPCS Flash
Hallo together,
I'm actually trying to save data from NIOS II into an EPCS64 device. My system contains an EPCS controller. But now the confusion is complete, there are so many files for using an flash... and I'm not sure which to use. There are: - altera_avalon_epcs_flash_controller.h - sys\alt_flash.h - epcs_commands.h And all these headers include different read/write functions. Then I tried an example from the Internet to start.
static alt_flash_fd* epcs16_dev_ptr;
static flash_region *p_epcs_reg_info;
static int num_epcs_regs;
void epcs_open(void)
{
epcs16_dev_ptr = alt_flash_open_dev(EPCS_FLASH_CONTROLLER_NAME);
if (epcs16_dev_ptr == NULL)
{
alt_printf("** Can't open flash device **\n\n");
return;
}
alt_epcs_flash_get_info(epcs16_dev_ptr, &p_epcs_reg_info, &num_epcs_regs);
return;
}47 Replies
Altera_Forum--- Quote Start --- I suppose that at least it breaks at all other timer init... Anyway you can place also a breakpoint at jtag uart init and see if it stops also there. Just a hint: I see a watchdog, did you disabled it when you debug your device? Because if for example you reset your device if it not refreshed correctly, probably your debugging is fake. Anyway initialization of device is required. As a last option, you could call ALTERA_AVALON_EPCS_FLASH_CONTROLLER_INSTANCE and ALTERA_AVALON_EPCS_FLASH_CONTROLLER_INIT within your main()... :cry: Ciao --- Quote End --- Yes I disabled it. I did so, an you see the result in attachment... it stops, but not at the bp. Strange!? What is ALTERA_AVALON_EPCS_FLASH_CONTROLLER_INSTANCE? I've never read it.- Altera_Forum
Now I set also breakpoints in function static int alt_epcs_flash_query(alt_flash_epcs_dev* flash)... But it never reaches one of them.
Any ideas?? - Altera_Forum
I suppose that at least it breaks at all other timer init... Anyway you can place also a breakpoint at jtag uart init and see if it stops also there.
Just a hint: I see a watchdog, did you disabled it when you debug your device? Because if for example you reset your device if it not refreshed correctly, probably your debugging is fake. Anyway initialization of device is required. As a last option, you could call ALTERA_AVALON_EPCS_FLASH_CONTROLLER_INSTANCE and ALTERA_AVALON_EPCS_FLASH_CONTROLLER_INIT within your main()... :cry: Ciao - Altera_Forum
That's the view of altera_avalon_epcs_flash_controller.h (attachment).
I think that is how you mean, right? - Altera_Forum
Ok, I did so (see image). And eclipse goes to break at ALTERA_AVALON_TIMER_INIT ( TIMER_STAMP, timer_stamp);
Then I pressed F6 (step over), and I was in main()... it didn't go to break at any of the other break points... - Altera_Forum
Did you try placing the breakpoint within alt_sys_init()?
- Altera_Forum
I use the main.c in attachment. Very simple.
Is there any point I miss?? Disabling the reduced driver option has no effect. Greets - Altera_Forum
You have not to call it, it is called once alt_sys_init() function is called. Try putting a breakpoint at the beginning of alt_sys_init(), it is called before your main().
Ciao - Altera_Forum--- Quote Start --- It's quite strange that if you put a breakpoint within alt_epcs_flash_init() it doesn't break... I tried that and I got break there. I'm sure you verified it, but just to be absolutely sure, use the IDE as editor and check that is defined part of ALTERA_AVALON_EPCS_FLASH_CONTROLLER_INIT macro with alt_epcs_flash_init and not the other; if it is, there is no possibility that you can't break there. Just as an attempt you could try disabling small driver. As you would agree with me, without initialization device is not registered (alt_flash_device_register) and cannot be opened. I think that once you get a correct initialization of device it will start working. :) Ciao --- Quote End --- Yes to all your points :) I set 3 break points in this function, then I started in Debug mode and Eclispe starts at the main(). Then I click run and it runs... never comes to bp. When should this macro be called?? Had I to call this macro?
- Altera_Forum
It's quite strange that if you put a breakpoint within alt_epcs_flash_init() it doesn't break... I tried that and I got break there.
I'm sure you verified it, but just to be absolutely sure, use the IDE as editor and check that is defined part of ALTERA_AVALON_EPCS_FLASH_CONTROLLER_INIT macro with alt_epcs_flash_init and not the other; if it is, there is no possibility that you can't break there. Just as an attempt you could try disabling small driver. As you would agree with me, without initialization device is not registered (alt_flash_device_register) and cannot be opened. I think that once you get a correct initialization of device it will start working. :) Ciao
