topic Re: IMXRT1021 IAP and OTA update in i.MX RT Crossover MCUs

IMXRT1021 IAP and OTA update

huy_tv — Thu, 07 Oct 2021 03:06:49 GMT

Dear all,

I have a question about ota update.
In my project, i want to perform OTA update for imxrt1021 via cellular network.
In other MCU like stm32,...

I have to write my own bootloader
Bootloader jump to application
Application running, and download new binary firmware into other region in flash
Bootloader select new firmware and jump to new application

In imxrt1021, i think i should write a secondary bootloader. ROM bootloader will run to secondary bootloader in QSPI flash, then secondary bootloader will jump to user application.

How can i do it with IMXRT1021 platform?I take a look at Flash loader example in NXP SDK, but it seem Flash loader example need computer, and loader program must be run in RAM.
Do you have any example about IAP update, or could you please give me your suggestion, any application note or documentations?

Thank you.

Re: IMXRT1021 IAP and OTA update

mjbcswitzerland — Thu, 07 Oct 2021 17:22:03 GMT

Hi

The uTasker project (including i.MX RT 1021 support) includes secure OTA loaders which can operate on various Wi-Fi and cellular modems, including USB RNDIS types. See details, documents and videos of the overall concept at https://www.utasker.com/iMX/developers.html

However there are many cellular modems that communicate in incompatible manners so this interface may need to be adapted (irrespective of which solution you use).

Regards

Mark

Re: IMXRT1021 IAP and OTA update

huy_tv — Fri, 08 Oct 2021 02:16:36 GMT

Thanks Mark,

I will register uTasker and request a personal license. It's seem not fully opensource license.
Why NXP doesn't provide an IAP sample code in SDK to help developer write custom bootloader?
I only see sample code from "Flash loader" example, but it only run from RAM. How can i move it into QSPI flash and execute firmware switch by my self?
Could you please share any documentation about it?

Thank you.

Re: IMXRT1021 IAP and OTA update

Omar_Anguiano — Tue, 12 Oct 2021 22:05:37 GMT

Hello
Hope you are well.

The application note AN12604 intends to introduce one example to illustrate how to implement a second boot loader on i.MX RT1050, i.MX RT1020, and i.MX RT1060 part based on XIP flash: https://www.nxp.com/docs/en/application-note/AN12604.pdf

If you have more questions do not hesitate to ask me.
Best regards,
Omar

Re: IMXRT1021 IAP and OTA update

huy_tv — Wed, 13 Oct 2021 01:42:16 GMT

Dear Anguiano

Does NXP provide sample code for AN12604?

Thank you.

Re: IMXRT1021 IAP and OTA update

Omar_Anguiano — Wed, 13 Oct 2021 22:51:00 GMT

Yes, you can find it at the Documentation tab in the device product page: https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/i-mx-rt-crossover-mcus/i-mx-rt1020-crossover-mcu-with-arm-cortex-m7-core:i.MX-RT1020?tab=Documentation_Tab

If you have more questions do not hesitate to ask me.
Best regards,
Omar

Re: IMXRT1021 IAP and OTA update

huy_tv — Thu, 14 Oct 2021 11:12:28 GMT

Dear @Omar_Anguiano

I tried to import AN12604SW booloader source code into MCU Expresso IDE, because i dont have IAR license (NXP use IAR for bootloader demostration).

I'm stuck in hardfaut, after debugging step by step,I found the fault reason is the function "is_valid_application_location", NXP sample code will check "applicationAddress == (uint32_t)&Reset_Handler", and "Reset_Handler" is set by IAR Linker.
How can we set "Reset_Handler" value in MCU ExpressoSDK?

Below is the code of NXP and Linker by IAR

bool is_valid_application_location(uint32_t applicationAddress) { // Verify that the jumpLocation is non zero and then either within flash or RAM, both calculations are: // (jumpLocation >= startAddress) && (jumpLocation < (startAddress + size)) if ((!applicationAddress) || // address is not null AND (applicationAddress == 0xffffffff) || // address is not blank Flash (0xff) AND (applicationAddress == (uint32_t)&Reset_Handler)|| (*(uint32_t *)applicationAddress == 0xffffffff)) { return false; } bool isValid = true; //const uint32_t minThumb2InstructionSize = 2; // smallest thumb2 instruction size is 16-bit. // Check if the application address is in valid executable memory range // status_t status = find_map_entry(applicationAddress, minThumb2InstructionSize, &map); // if ((status == kStatus_Success) && (map->memoryProperty & kMemoryIsExecutable)) { // isValid = true; } return isValid; }

- Linker

* Entry Point */ ENTRY(Reset_Handler) HEAP_SIZE = DEFINED(__heap_size__) ? __heap_size__ : 0x0400; STACK_SIZE = DEFINED(__stack_size__) ? __stack_size__ : 0x0400; /* Specify the memory areas */ MEMORY { m_flash_config (RX) : ORIGIN = 0x60000000, LENGTH = 0x00001000 m_ivt (RX) : ORIGIN = 0x60001000, LENGTH = 0x00001000 m_interrupts (RX) : ORIGIN = 0x60002000, LENGTH = 0x00000400 m_text (RX) : ORIGIN = 0x60002400, LENGTH = 0x03FFDC00 m_data (RW) : ORIGIN = 0x20000000, LENGTH = 0x00020000 m_data2 (RW) : ORIGIN = 0x20200000, LENGTH = 0x00040000 } /* Define output sections */ SECTIONS { .flash_config : { . = ALIGN(4); __FLASH_BASE = .; KEEP(* (.boot_hdr.conf)) /* flash config section */ . = ALIGN(4); } > m_flash_config ivt_begin= ORIGIN(m_flash_config) + LENGTH(m_flash_config); .ivt : AT(ivt_begin) { . = ALIGN(4); KEEP(* (.boot_hdr.ivt)) /* ivt section */ KEEP(* (.boot_hdr.boot_data)) /* boot section */ KEEP(* (.boot_hdr.dcd_data)) /* dcd section */ . = ALIGN(4); } > m_ivt

Thank you.

Re: IMXRT1021 IAP and OTA update

huy_tv — Fri, 15 Oct 2021 02:02:37 GMT

Dear all

The problem solve by change "Reset_Handler" to "Reset_ISR".

Thanks @Omar_Anguiano

Re: IMXRT1021 IAP and OTA update

Richard75 — Wed, 15 Dec 2021 07:51:41 GMT

Hello sir,

I am having a problem to import theAN12604SW bootoader source code into MCU Expresso IDE.

Could you help me with instructions to import it ? or could please share the imported project ?

Thanks