Combine full version information into one const string in source code to optimize bootloader size, to make the bootloader for MKR VIDOR 4000 less than 8 KByte in size.

Author: ksmith3036

bootloaders/zero/sam_ba_monitor.c

@@ -29,9 +29,9 @@
 #include "board_driver_led.h"
 #include <stdlib.h>
 
-const char RomBOOT_Version[] = SAM_BA_VERSION;
 // X = Chip Erase, Y = Write Buffer, Z = Checksum Buffer, P = Secure Bit Aware
-const char RomBOOT_ExtendedCapabilities[] = "[Arduino:XYZP]";
+#define ROMBOOT_EXTENDEDCAPABILITIES "[Arduino:XYZP]"
+const char ROMBoot_VersionInformation[] = "v" SAM_BA_VERSION " " ROMBOOT_EXTENDEDCAPABILITIES " " __DATE__ " " __TIME__ "\n\r";
 
 /* Provides one common interface to handle both USART and USB-CDC */
 typedef struct
@@ -485,12 +485,7 @@ static void sam_ba_monitor_loop(void)
       }
       else if (command == 'V') // Read version information
       {
-        sam_ba_putdata( ptr_monitor_if, "v", 1);
-        sam_ba_putdata( ptr_monitor_if, (uint8_t *) RomBOOT_Version, strlen(RomBOOT_Version));
-        sam_ba_putdata( ptr_monitor_if, " ", 1);
-        sam_ba_putdata( ptr_monitor_if, (uint8_t *) RomBOOT_ExtendedCapabilities, strlen(RomBOOT_ExtendedCapabilities));
-        ptr = (uint8_t*) &(" " __DATE__ " " __TIME__ "\n\r");
-        sam_ba_putdata( ptr_monitor_if, ptr, strlen(ptr));
+        sam_ba_putdata( ptr_monitor_if, ROMBoot_VersionInformation, sizeof(ROMBoot_VersionInformation) - 1);
       }
       else if (command == 'X') // Erase flash
       {