mbed_example / Mbed OS SlicingBlockDevice_ex_1

SlicingBlockDevice example that showcases how to slice a larger block device into sub units.

Fork of ChainingBlockDevice_ex_2 by mbed_example

main.cpp@3:62c01cd06ff7, 2017-10-25 (annotated)

Committer:
kgilbert
Date:
Wed Oct 25 20:18:23 2017 +0000
Revision:
3:62c01cd06ff7
Parent:
2:70419b9d778a 
Add source for example

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kgilbert 0:daa62d7aa9f9 1 #include "mbed.h"
kgilbert 0:daa62d7aa9f9 2 #include "HeapBlockDevice.h"
kgilbert 3:62c01cd06ff7 3 #include "SlicingBlockDevice.h"
kgilbert 2:70419b9d778a 4
kgilbert 3:62c01cd06ff7 5 #define BLOCK 512
kgilbert 3:62c01cd06ff7 6 #define NUMSLICES 3
kgilbert 3:62c01cd06ff7 7
kgilbert 3:62c01cd06ff7 8 char buff[BLOCK];
kgilbert 2:70419b9d778a 9
kgilbert 0:daa62d7aa9f9 10 int main(void) {
kgilbert 3:62c01cd06ff7 11 // Create a block device with 64 blocks of size 512
kgilbert 3:62c01cd06ff7 12 HeapBlockDevice mem(64*BLOCK, BLOCK);
kgilbert 3:62c01cd06ff7 13
kgilbert 3:62c01cd06ff7 14 SlicingBlockDevice slices[NUMSLICES] = {
kgilbert 3:62c01cd06ff7 15 // Create a block device that maps to the first 32 blocks
kgilbert 3:62c01cd06ff7 16 SlicingBlockDevice(&mem, 0 *BLOCK, 32*BLOCK),
kgilbert 2:70419b9d778a 17
kgilbert 3:62c01cd06ff7 18 // Create a block device that maps to the middle 32 blocks
kgilbert 3:62c01cd06ff7 19 SlicingBlockDevice(&mem, 16*BLOCK, -16*BLOCK),
kgilbert 3:62c01cd06ff7 20
kgilbert 3:62c01cd06ff7 21 // Create a block device that maps to the last 32 blocks
kgilbert 3:62c01cd06ff7 22 SlicingBlockDevice(&mem, 32*BLOCK)
kgilbert 3:62c01cd06ff7 23 };
kgilbert 3:62c01cd06ff7 24
kgilbert 3:62c01cd06ff7 25 for (int i = 0; i < NUMSLICES; i++) {
kgilbert 3:62c01cd06ff7 26 // Initialize and erase the slice to prepar for programming
kgilbert 3:62c01cd06ff7 27 slices[i].init();
kgilbert 3:62c01cd06ff7 28 slices[i].erase(0, 32*BLOCK);
kgilbert 3:62c01cd06ff7 29
kgilbert 3:62c01cd06ff7 30 // Construct the message for the block and write to the slice
kgilbert 3:62c01cd06ff7 31 sprintf((char *)&buff, "test: %d", i);
kgilbert 3:62c01cd06ff7 32 slices[i].program(&buff, 0, BLOCK);
kgilbert 3:62c01cd06ff7 33 }
kgilbert 3:62c01cd06ff7 34
kgilbert 3:62c01cd06ff7 35 for (int i = 0; i < NUMSLICES; i++) {
kgilbert 3:62c01cd06ff7 36 // Read back the programmed blocks through the underlying block device
kgilbert 3:62c01cd06ff7 37 mem.read(&buff, (i * 16 * BLOCK), BLOCK);
kgilbert 3:62c01cd06ff7 38 printf("%s --> ", buff);
kgilbert 3:62c01cd06ff7 39
kgilbert 3:62c01cd06ff7 40 // Read back the programmed blocks through the sliced block device.
kgilbert 3:62c01cd06ff7 41 slices[i].read(&buff,0, BLOCK);
kgilbert 3:62c01cd06ff7 42 printf("%s\r\n", buff);
kgilbert 3:62c01cd06ff7 43 }
kgilbert 0:daa62d7aa9f9 44 }