Lpc1768 bootloader support

platform/mbed_toolchain.h

@@ -92,6 +92,26 @@
 #endif
 #endif
 
+/** MBED_USED
+ *  Inform the compiler that a static variable is to be retained in the object file, even if it is unreferenced.
+ *
+ *  @code
+ *  #include "mbed_toolchain.h"
+ *
+ *  MBED_USED int foo;
+ *
+ *  @endcode
+ */
+#ifndef MBED_USED
+#if defined(__GNUC__) || defined(__clang__) || defined(__CC_ARM)
+#define MBED_USED __attribute__((used))
+#elif defined(__ICCARM__)
+#define MBED_USED __root
+#else
+#define MBED_USED
+#endif
+#endif
+
 /** MBED_WEAK
  *  Mark a function as being weak.
  *

targets/TARGET_NXP/TARGET_LPC176X/device/CRP.c

@@ -0,0 +1,54 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2017 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *	 http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ #include "mbed_toolchain.h"
+
+ /* Code Read Protection
+
+NONE	0xFFFFFFFF - No code protection.
+
+CRP1    0x12345678 - Write to RAM command can not access RAM below 0x10000200.
+                   - Read Memory command: disabled.
+                   - Copy RAM to Flash command: cannot write to Sector 0.
+                   - "Go" command: disabled.
+                   - Erase sector(s) command: can erase any individual sector except 
+                   	 sector 0 only, or can erase all sectors at once.
+                   - Compare command: disabled
+
+CRP2    0x87654321 - Write to RAM command: disabled.
+                   - Copy RAM to Flash: disabled.
+                   - Erase command: only allows erase of all sectors.
+
+CRP3    0x43218765 - Access to chip via the SWD pins is disabled. ISP entry
+                     by pulling PIO0_1 LOW is disabled if a valid user code is
+                     present in flash sector 0.
+Caution: If CRP3 is selected, no future factory testing can be
+performed on the device.
+*/
+#if !defined(APPLICATION_ADDR) // Relocate CRP if there is a bootloader.
+    #define APPLICATION_ADDR 0
+#endif
+
+#define CRP_NONE	0xFFFFFFFF
+#define CRP_1		0x12345678 
+#define CRP_2		0x87654321
+#define CRP_3		0x43218765
+
+#ifndef CRP
+#define CRP CRP_NONE
+#endif
+
+MBED_SECTION(".CRPSection") MBED_USED const long CRP_Key = CRP;

targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_MICRO/LPC1768.sct

@@ -1,9 +1,24 @@
+#! armcc -E
 
-LR_IROM1 0x00000000 0x80000  {    ; load region size_region
-  ER_IROM1 0x00000000 0x80000  {  ; load address = execution address
-   *.o (RESET, +First)
-   *(InRoot$$Sections)
-   .ANY (+RO)
+#if !defined(MBED_APP_START)
+  #define MBED_APP_START 0x00000000
+#endif
+
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE 0x80000
+#endif
+
+LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
+  ER_IROM0 MBED_APP_START 0x2FC  {  ; load address = execution address
+    *.o (RESET, +First)
+    .ANY (+RO)
+  }
+  ER_CRP (MBED_APP_START + 0x2FC) FIXED 4  {
+    *.o (.CRPSection)
+  }
+  ER_IROM1 (MBED_APP_START + (0x2FC + 4)) FIXED (MBED_APP_SIZE - (0x2FC + 4))  {
+    *(InRoot$$Sections)
+    .ANY (+RO)
   }
   ; 8_byte_aligned(49 vect * 4 bytes) =  8_byte_aligned(0xC4) = 0xC8
   ; 32KB (RAM size) - 0xC8 (NIVT) - 32 (topmost 32 bytes used by IAP functions) = 0x7F18

targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_MICRO/startup_LPC17xx.S

@@ -99,12 +99,6 @@ __Vectors       DCD     __initial_sp              ; Top of Stack
                 DCD     PLL1_IRQHandler           ; 48: PLL1 Lock (USB PLL)
 
 
-                IF      :LNOT::DEF:NO_CRP
-                AREA    |.ARM.__at_0x02FC|, CODE, READONLY
-CRP_Key         DCD     0xFFFFFFFF
-                ENDIF
-
-
                 AREA    |.text|, CODE, READONLY
 
 

targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_STD/LPC1768.sct

@@ -1,9 +1,24 @@
+#! armcc -E
 
-LR_IROM1 0x00000000 0x80000  {    ; load region size_region
-  ER_IROM1 0x00000000 0x80000  {  ; load address = execution address
-   *.o (RESET, +First)
-   *(InRoot$$Sections)
-   .ANY (+RO)
+#if !defined(MBED_APP_START)
+  #define MBED_APP_START 0x00000000
+#endif
+
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE 0x80000
+#endif
+
+LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region
+  ER_IROM0 MBED_APP_START 0x2FC  {  ; load address = execution address
+    *.o (RESET, +First)
+    .ANY (+RO)
+  }
+  ER_CRP (MBED_APP_START + 0x2FC) FIXED 4  {
+    *.o (.CRPSection)
+  }
+  ER_IROM1 (MBED_APP_START + (0x2FC + 4)) FIXED (MBED_APP_SIZE - (0x2FC + 4))  {
+    *(InRoot$$Sections)
+    .ANY (+RO)
   }
   ; 8_byte_aligned(49 vect * 4 bytes) =  8_byte_aligned(0xC4) = 0xC8
   ; 32KB (RAM size) - 0xC8 (NIVT) - 32 (topmost 32 bytes used by IAP functions) = 0x7F18

targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_ARM_STD/startup_LPC17xx.S

@@ -82,12 +82,6 @@ __Vectors       DCD     __initial_sp              ; Top of Stack
                 DCD     PLL1_IRQHandler           ; 48: PLL1 Lock (USB PLL)
 
 
-                IF      :LNOT::DEF:NO_CRP
-                AREA    |.ARM.__at_0x02FC|, CODE, READONLY
-CRP_Key         DCD     0xFFFFFFFF
-                ENDIF
-
-
                 AREA    |.text|, CODE, READONLY
 
 

targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_GCC_ARM/LPC1768.ld

@@ -1,9 +1,15 @@
 /* Linker script for mbed LPC1768 */
+#if !defined(MBED_APP_START)
+  #define MBED_APP_START 0x00000000
+#endif
 
+#if !defined(MBED_APP_SIZE)
+  #define MBED_APP_SIZE 512K
+#endif
 /* Linker script to configure memory regions. */
 MEMORY
 {
-  FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 512K
+  FLASH (rx) : ORIGIN = MBED_APP_START, LENGTH = MBED_APP_SIZE
   RAM (rwx) : ORIGIN = 0x100000C8, LENGTH = (32K - 0xC8 - 32)  /* topmost 32 bytes used by IAP functions */
 
   USB_RAM(rwx) : ORIGIN = 0x2007C000, LENGTH = 16K
@@ -43,6 +49,10 @@ SECTIONS
     .text :
     {
         KEEP(*(.isr_vector))
+        /* Code Read Protect data */
+        . = 0x000002FC ;
+        KEEP(*(.CRPSection))
+        /* End of Code Read Protect */
         *(.text*)
 
         KEEP(*(.init))
@@ -65,6 +75,8 @@ SECTIONS
         *(.rodata*)
 
         KEEP(*(.eh_frame*))
+
+
     } > FLASH
 
     .ARM.extab : 

targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_IAR/LPC17xx.icf

@@ -1,11 +1,13 @@
+if (!isdefinedsymbol(MBED_APP_START)) { define symbol MBED_APP_START = 0x00000000; }
+if (!isdefinedsymbol(MBED_APP_SIZE)) { define symbol MBED_APP_SIZE = 0x80000; }
 /*###ICF### Section handled by ICF editor, don't touch! ****/
 /*-Editor annotation file-*/
 /* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
 /*-Specials-*/
-define symbol __ICFEDIT_intvec_start__ = 0x00000000;
+define symbol __ICFEDIT_intvec_start__ = MBED_APP_START;
 /*-Memory Regions-*/
-define symbol __ICFEDIT_region_ROM_start__   = 0x00000000;
-define symbol __ICFEDIT_region_ROM_end__     = 0x0007FFFF;
+define symbol __ICFEDIT_region_ROM_start__   = MBED_APP_START;
+define symbol __ICFEDIT_region_ROM_end__     = MBED_APP_START + MBED_APP_SIZE - 1;
 define symbol __ICFEDIT_region_NVIC_start__   = 0x10000000;
 define symbol __ICFEDIT_region_NVIC_end__   = 0x100000C7;
 define symbol __ICFEDIT_region_RAM_start__   = 0x100000C8;
@@ -17,8 +19,8 @@ define symbol __ICFEDIT_size_cstack__   = 0x1000;
 define symbol __ICFEDIT_size_heap__     = 0x2000;
 /**** End of ICF editor section. ###ICF###*/
 
-define symbol __CRP_start__   = 0x000002FC;
-define symbol __CRP_end__     = 0x000002FF;
+define symbol __CRP_start__   = MBED_APP_START + 0x000002FC;
+define symbol __CRP_end__     = MBED_APP_START + 0x000002FF;
 
 define symbol __RAM1_start__  = 0x2007C000;
 define symbol __RAM1_end__    = 0x20083FFF;
@@ -41,5 +43,5 @@ place in ROM_region   { readonly };
 place in RAM_region   { readwrite,
                         block HEAP, block CSTACK };
 
-place in CRP_region  	{ section .crp };
+place in CRP_region  	{ section .CRPSection };
 place in RAM1_region	{ section .ethusbram };

targets/TARGET_NXP/TARGET_LPC176X/device/TOOLCHAIN_IAR/startup_LPC17xx.S

@@ -350,26 +350,4 @@ USBActivity_IRQHandler
 CANActivity_IRQHandler
         B CANActivity_IRQHandler
 
-#ifndef SRAM
-        SECTION .crp:CODE:ROOT(2)
-        DATA
-/* Code Read Protection
-CRP1    0x12345678 - Write to RAM command can not access RAM below 0x10000200.
-                   - Read Memory command: disabled.
-                   - Copy RAM to Flash command: cannot write to Sector 0.
-                   - "Go" command: disabled.
-                   - Erase sector(s) command: can erase any individual sector except 
-                   	 sector 0 only, or can erase all sectors at once.
-                   - Compare command: disabled
-CRP2    0x87654321 - Write to RAM command: disabled.
-                   - Copy RAM to Flash: disabled.
-                   - Erase command: only allows erase of all sectors.
-CRP3    0x43218765 - Access to chip via the SWD pins is disabled. ISP entry
-                     by pulling PIO0_1 LOW is disabled if a valid user code is
-                     present in flash sector 0.
-Caution: If CRP3 is selected, no future factory testing can be
-performed on the device.
-*/
-	DCD	0xFFFFFFFF
-#endif
         END

targets/targets.json

@@ -241,7 +241,8 @@
         "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "DEBUG_AWARENESS", "ETHERNET", "I2C", "I2CSLAVE", "INTERRUPTIN", "LOCALFILESYSTEM", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SEMIHOST", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES", "FLASH"],
         "release_versions": ["2", "5"],
         "features": ["LWIP"],
-        "device_name": "LPC1768"
+        "device_name": "LPC1768",
+        "bootloader_supported": true
     },
     "ARCH_PRO": {
         "supported_form_factors": ["ARDUINO"],
@@ -253,7 +254,8 @@
         "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "DEBUG_AWARENESS", "ETHERNET", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES", "FLASH"],
         "release_versions": ["2", "5"],
         "features": ["LWIP"],
-        "device_name": "LPC1768"
+        "device_name": "LPC1768",
+        "bootloader_supported": true
     },
     "UBLOX_C027": {
         "supported_form_factors": ["ARDUINO"],
@@ -277,7 +279,8 @@
         "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "DEBUG_AWARENESS", "ETHERNET", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "SPISLAVE", "STDIO_MESSAGES", "FLASH"],
         "release_versions": ["2", "5"],
         "features": ["LWIP"],
-        "device_name": "LPC1768"
+        "device_name": "LPC1768",
+        "bootloader_supported": true
     },
     "XBED_LPC1768": {
         "inherits": ["LPCTarget"],