mbed-os-examples / Mbed OS mbed-os-example-mbed5-bootloader

.

main.cpp@14:9476f399341e, 2017-06-19 (annotated)

Committer:
mbed_official
Date:
Mon Jun 19 22:00:16 2017 +0100
Revision:
14:9476f399341e
Parent:
11:d396becb5d76
Child:
24:8235ee7fff3d
Distinguish app and bootloader binaries. Use app config.



This attempts to clarify a few vague points in the README. It helps to

distinguish between the different binaries created during the bootloader

building process.



It takes care of the somewhat confusing '/sd/' mount path for the

SD card. This is now handled by the program, allowing the user to just

specify the name of the binary that is placed in the root of the SD card.



It makes more use of app config to support onboard SD card slots

for the K64F and the UBLOX_EVK_ODIN_W2. It will use the Arduino SPI pins

for any other target.



The application update binary name is now specified in the app config as

well.



.

Commit copied from https://github.com/ARMmbed/mbed-os-example-bootloader

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:8df79c088b12 1 #include "mbed.h"
mbed_official 0:8df79c088b12 2 #include "SDBlockDevice.h"
mbed_official 0:8df79c088b12 3 #include "FATFileSystem.h"
mbed_official 0:8df79c088b12 4
mbed_official 14:9476f399341e 5 #define SD_MOUNT_PATH "sd"
mbed_official 14:9476f399341e 6 #define FULL_UPDATE_FILE_PATH "/" SD_MOUNT_PATH "/" MBED_CONF_APP_UPDATE_FILE
mbed_official 14:9476f399341e 7
mbed_official 14:9476f399341e 8 //Pin order: MOSI, MISO, SCK, CS
mbed_official 14:9476f399341e 9 SDBlockDevice sd(MBED_CONF_APP_SD_CARD_MOSI, MBED_CONF_APP_SD_CARD_MISO,
mbed_official 14:9476f399341e 10 MBED_CONF_APP_SD_CARD_SCK, MBED_CONF_APP_SD_CARD_CS);
mbed_official 14:9476f399341e 11 FATFileSystem fs(SD_MOUNT_PATH);
mbed_official 0:8df79c088b12 12 FlashIAP flash;
mbed_official 0:8df79c088b12 13
mbed_official 0:8df79c088b12 14 void apply_update(FILE *file, uint32_t address);
mbed_official 0:8df79c088b12 15
mbed_official 0:8df79c088b12 16 int main()
mbed_official 0:8df79c088b12 17 {
mbed_official 0:8df79c088b12 18 sd.init();
mbed_official 0:8df79c088b12 19 fs.mount(&sd);
mbed_official 0:8df79c088b12 20
mbed_official 14:9476f399341e 21 FILE *file = fopen(FULL_UPDATE_FILE_PATH, "rb");
mbed_official 0:8df79c088b12 22 if (file != NULL) {
mbed_official 0:8df79c088b12 23 printf("Firmware update found\r\n");
mbed_official 0:8df79c088b12 24
mbed_official 0:8df79c088b12 25 apply_update(file, POST_APPLICATION_ADDR);
mbed_official 0:8df79c088b12 26
mbed_official 0:8df79c088b12 27 fclose(file);
mbed_official 14:9476f399341e 28 remove(FULL_UPDATE_FILE_PATH);
mbed_official 0:8df79c088b12 29 } else {
mbed_official 0:8df79c088b12 30 printf("No update found to apply\r\n");
mbed_official 0:8df79c088b12 31 }
mbed_official 0:8df79c088b12 32
mbed_official 0:8df79c088b12 33 fs.unmount();
mbed_official 0:8df79c088b12 34 sd.deinit();
mbed_official 0:8df79c088b12 35
mbed_official 0:8df79c088b12 36 printf("Starting application\r\n");
mbed_official 0:8df79c088b12 37
mbed_official 0:8df79c088b12 38 mbed_start_application(POST_APPLICATION_ADDR);
mbed_official 0:8df79c088b12 39 }
mbed_official 0:8df79c088b12 40
mbed_official 0:8df79c088b12 41 void apply_update(FILE *file, uint32_t address)
mbed_official 0:8df79c088b12 42 {
mbed_official 0:8df79c088b12 43 flash.init();
mbed_official 0:8df79c088b12 44
mbed_official 0:8df79c088b12 45 const uint32_t page_size = flash.get_page_size();
mbed_official 0:8df79c088b12 46 char *page_buffer = new char[page_size];
mbed_official 0:8df79c088b12 47 uint32_t addr = address;
mbed_official 0:8df79c088b12 48 uint32_t next_sector = addr + flash.get_sector_size(addr);
mbed_official 0:8df79c088b12 49 bool sector_erased = false;
mbed_official 0:8df79c088b12 50 while (true) {
mbed_official 0:8df79c088b12 51
mbed_official 0:8df79c088b12 52 // Read data for this page
mbed_official 0:8df79c088b12 53 memset(page_buffer, 0, sizeof(page_buffer));
mbed_official 0:8df79c088b12 54 int size_read = fread(page_buffer, 1, page_size, file);
mbed_official 0:8df79c088b12 55 if (size_read <= 0) {
mbed_official 0:8df79c088b12 56 break;
mbed_official 0:8df79c088b12 57 }
mbed_official 0:8df79c088b12 58
mbed_official 0:8df79c088b12 59 // Erase this page if it hasn't been erased
mbed_official 0:8df79c088b12 60 if (!sector_erased) {
mbed_official 0:8df79c088b12 61 flash.erase(addr, flash.get_sector_size(addr));
mbed_official 0:8df79c088b12 62 sector_erased = true;
mbed_official 0:8df79c088b12 63 }
mbed_official 0:8df79c088b12 64
mbed_official 0:8df79c088b12 65 // Program page
mbed_official 0:8df79c088b12 66 flash.program(page_buffer, addr, page_size);
mbed_official 0:8df79c088b12 67
mbed_official 0:8df79c088b12 68 addr += page_size;
mbed_official 0:8df79c088b12 69 if (addr >= next_sector) {
mbed_official 0:8df79c088b12 70 next_sector = addr + flash.get_sector_size(addr);
mbed_official 0:8df79c088b12 71 sector_erased = false;
mbed_official 0:8df79c088b12 72
mbed_official 0:8df79c088b12 73 }
mbed_official 0:8df79c088b12 74 }
mbed_official 0:8df79c088b12 75 delete[] page_buffer;
mbed_official 0:8df79c088b12 76
mbed_official 0:8df79c088b12 77 flash.deinit();
mbed_official 0:8df79c088b12 78 }