vpcola/lpc1769

Bare metal build for LPC1769 projects

lpc1769's Issues

bug in linker script

Hi, I'm trying to get a lpc setup working on linux, this has been a great help. However, I think your linker script has a bug here:

PROVIDE(__LPC_Checksum = 0 - 
        (_vStackTop 
        + (Reset_Handler + 1) 
        + (NMI_Handler + 1) 
        + (HardFault_Handler + 1)
        + (( DEFINED(MemManage_Handler) ? MemManage_Handler : 0 ) + 1)   /* MemManage_Handler may not be defined */ 
        + (( DEFINED(BusFault_Handler) ? BusFault_Handler : 0 ) + 1)     /* BusFault_Handler may not be defined */ 
        + (( DEFINED(UsageFault_Handler) ? UsageFault_Handler : 0 ) + 1) /* UsageFault_Handler may not be defined */ 
        ) );

If MemManage_Handler, BusFault_Handler or UsageFault_Handler are not defined, the vector table will have zeros there, so you can't add 1 to it (for thumb mode).

This looks more correct to me:

PROVIDE(__LPC_Checksum = 0 -
        (_vStackTop
        + (Reset_Handler + 1) /* +1 for Thumb mode */
        + (NMI_Handler + 1)
        + (HardFault_Handler + 1)
        + (( DEFINED(MemManage_Handler) ? (MemManage_Handler + 1) : 0 )) /* these may not be defined, so +1 only if exist */
        + (( DEFINED(BusFault_Handler) ? (BusFault_Handler + 1) : 0 ))
        + (( DEFINED(UsageFault_Handler) ? (UsageFault_Handler + 1) : 0 ))
        ) );