LPCXpresso804 I2C based Secondary Bootloader command clarification

roshanmohammed — Fri, 20 May 2022 09:10:28 GMT

Hi All,

Firmware update is successful when tested with I2C-utils.exe from PC to LPCXpresso804 EVK via LPCXpresso54102(I2C to USB Convertor).

Referred the document AN12373 and followed the steps below

1. Press the Reset button to boot the application image.
2. Issue the f command to pull nHostIRQ low.
3. Press the Reset button to reset the LPCXpresso804 Board.
4. Issue the g command to program nHostIRQ as input.
5. Issue the 8 command to send the GetVerision.
6. Issue the 1 command to update the firmware, and then input the name of Firmware.
7. Issue the b command to BOOT the latest firmware.

But in actual case we are updating firmware from host processor to LPCXpresso804 via i2c. We are not using a USB converter.

So we followed the same steps provided by document AN12373 which is showing above. Able to take the MCU to SBL mode by following steps 1 to 4.

Then we followed one more document AN11610 for understanding the i2c communication for the steps 5-7 in AN12373 showing above.

From document AN11610 , We understood that slave addresses are 0x18, 0x30 and 0x1C.

The explanation for the 6th step Get version is shown below

As per my understand I tried to write the 0x00 address offset to a value 0XA1. I choose the slave address as 0x18.

Later i passed the command i2cdump -y 0 0x18 for reading the registers, I got the output showing below

So, Please clarify that what i are the exact process happening while passing commands from 6-8 steps.

Re: LPCXpresso804 I2C based Secondary Bootloader command clarification

CarlosGarabito — Wed, 25 May 2022 14:01:51 GMT

Hi, maybe the kernel config I2C is not enable, You can check some information in those links:

https://www.digi.com/resources/documentation/digidocs/90001546/reference/bsp/cc6/r_i2c.htm

https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/All-Boards-I2C-tools/ta-p/1117101

topic LPCXpresso804 I2C based Secondary Bootloader command clarification in LPC Microcontrollers

LPCXpresso804 I2C based Secondary Bootloader command clarification

Re: LPCXpresso804 I2C based Secondary Bootloader command clarification