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Discussion Title Created date
FAT memory allocation
Hi guys, I have the FAT32 filing system and also the exFAT.  Both use 2 memory arrays that are the size of the cluster size elected by the User when formatting.   Do you...
Monday, 14 October 2019 - 00:10
hidden gem
Guys, I found this wee gem on the internet.  Instead of say using a for loop to go from 10 to 0 ect you can use the -->   for example.   int x = 10;  ...
Wednesday, 9 October 2019 - 02:01
Link List
Write guys, this code is throwing out rubbish.  Output is:   fat->cluster_nr = 0x1234; dir_insert_cluster(fat); fat->cluster_nr = 0x4321; dir_insert_cluster(fat...
Thursday, 19 September 2019 - 19:43
not setting cluster 128
Hi guys, have a wee look at the code below and see if you can help me to discover why when the cluster number is 0x80/128 that it does not set the field properly. After I allocate...
Wednesday, 18 September 2019 - 16:09
clawson's expertise required (reading FAT32 directories)
Hi clawson, quick question!  When I create more than 63 folders in FAT32 only 63 are displayed when I insert the media into the computer.  Now 63 is a clue I'm guessing...
Wednesday, 11 September 2019 - 15:29
help with pointers
I have the following routine for checking if a pointer has gone out of bounds and resetting it back to the start.   char boudary_configure(struct ff_file * stream, char **...
Monday, 9 September 2019 - 22:47
filing systems
Guys when should I update files when working with them. Like it would be very wasteful to write data back to the storage media everytime I do a putc.   WM.   The...
Tuesday, 3 September 2019 - 21:19
interrupt vectors
Guy, I need to disable interrupts before the device make the vector jump show below using, "cpsid if" instruction.    /* Exception vectors *******************/ ....
Tuesday, 27 August 2019 - 22:46
Disabling and Enabling Global Interrupts
Will the following two assembly commands work to disable and enable global Interrupts on the SAMA5D44?   asm("cpsie if"); asm("cpsid if");I know they work for the SAM 7...
Friday, 23 August 2019 - 22:56
Interrupts & Context switching
Hi guys, I'll describe the operation first then show you what I mean.     Before I enter the interrupt the system calls a function to prepare for the interrupt and clear...
Monday, 19 August 2019 - 19:15
USB Stack Development Setup
Hi freaks,   I'm looking to start to learn the USB protocol.  So first of all I've found USB sniffer programs, a bit like Winshark.  How would I go about connecting...
Wednesday, 14 August 2019 - 20:42
help with Bubble Sort
Guys, i'm working on a bubble sort and its only resulting in a semi sorted list.  Long file names are not being sorted properly.   for (l = 0; l < entry_nr; l...
Tuesday, 16 July 2019 - 14:49

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