Hi,
I need to enter ISP mode with UART (flexcom 0)
Is it possible when a firmware is already in place on LPC55xx ?
After a reset, I send a "ping" command (5A A6), but I receive no response and the program in place launch.
The default CMPA is in "Auto ISP" mode
How to force CMPA to be in "UART ISP" mode without ISP pin ?
Note : When LPC55xx have no firmware, the "ping" command have a response ACK (5A A7 ...), because the LPC55xx goes into ISP mode automatically
Regards,
Phil
Hello ,
When the user image in flash is blank or invalid, it will enter ISP mode refer to DEFAULT_ISP_MODE bits defined in Table 170.
It is meaning, if there is a work well image in flash, it won't check DEFAULT_ISP_MODE bits.
BR
Alice
Hi Alice,
So how can I enter in ISP UART mode (without ISP pin) when I want upgrade my firmware ?
Phil
how can I enter in ISP UART mode (without ISP pin)
Have a look at the manual UM11126, chapter 6: "LPC55S6x/LPC55S2x/LPC552x Boot ROM".
There it reads:
There are several paths into the ISP mode: