LPC MicrocontrollersのトピックLPC11U2/3x secondary bootloader doens't jump to app

LPC11U2/3x secondary bootloader doens't jump to app

emimad — Thu, 05 May 2022 13:23:17 GMT

Hi friends!

I've spent few days trying to get my secondary bootloader working.

I've studied AN10995, which is for LPC1114 (not the same family), but I can't get to make it jump from secondary bootloader to app.

App is in 0x002000 address (I've checked it with flashmagic) and this is my jump sequence:

__disable_irq(); LPC_SYSCTL->MAINCLKSEL = 0; // using FRO LPC_SYSCTL->MAINCLKUEN = 0; LPC_SYSCTL->MAINCLKUEN = 1; SystemCoreClockUpdate(); /* Load main stack pointer with application stack pointer initial value, stored at first location of application area */ asm volatile("ldr r0, =0x2000"); //=0x1000"); asm volatile("ldr r0, [r0]"); asm volatile("mov sp, r0"); /* Load program counter with application reset vector address, located at second word of application area. */ asm volatile("ldr r0, =0x2004"); //=0x1004"); asm volatile("ldr r0, [r0]"); asm volatile("mov pc, r0");

Re: LPC11U2/3x secondary bootloader doens't jump to app

emimad — Thu, 05 May 2022 13:28:19 GMT

IRQ Handlers are similar to AN10995:

void NMI_Handler(void) { /* Re-direct interrupt, get handler address from application vector table */ asm volatile("ldr r0, =0x2008"); asm volatile("ldr r0, [r0]"); asm volatile("mov pc, r0"); } void HardFault_Handler(void) { /* Re-direct interrupt, get handler address from application vector table */ asm volatile("ldr r0, =0x200C"); asm volatile("ldr r0, [r0]"); asm volatile("mov pc, r0"); } void SVCall_Handler(void) { /* Re-direct interrupt, get handler address from application vector table */ asm volatile("ldr r0, =0x202C"); asm volatile("ldr r0, [r0]"); asm volatile("mov pc, r0"); } void PendSV_Handler(void) { /* Re-direct interrupt, get handler address from application vector table */ asm volatile("ldr r0, =0x2038"); asm volatile("ldr r0, [r0]"); asm volatile("mov pc, r0"); } void SysTick_Handler(void) { /* Re-direct interrupt, get handler address from application vector table */ asm volatile("ldr r0, =0x203C"); asm volatile("ldr r0, [r0]"); asm volatile("mov pc, r0"); } void WAKEUP_IRQHandler(void) { /* Re-direct interrupt, get handler address from application vector table */ asm volatile("ldr r0, =0x2040"); asm volatile("ldr r0, [r0]"); asm volatile("mov pc, r0"); }

Some help is needed, please.

Can somebody try my sequence and check what's the problem?

Re: LPC11U2/3x secondary bootloader doens't jump to app

emimad — Thu, 05 May 2022 14:21:29 GMT

SOLVED!!!!

App needs to activate IRQs in the beggining of the main()!!!

int main(void) {
__enable_irq();

OMG!