Solved! Go to Solution.
Solved - but i don't exactly know why, but this worked for me: Pressing RESET button while holding ISP button (no visible effect) and after that i just hold all four button about second ~ red rgb led start blinking. From now i can upload program again.
Taked me some time, but it work so i wille leave this ansewer here.
From user manual: "ISP/User button
When pressed, this button connect sport pin P0_5 to ground. Hold this
button down while pressing and releasing Reset (S4) to force the
LPC55S69 into ISP mode."
Solved - but i don't exactly know why, but this worked for me: Pressing RESET button while holding ISP button (no visible effect) and after that i just hold all four button about second ~ red rgb led start blinking. From now i can upload program again.
Taked me some time, but it work so i wille leave this ansewer here.
From user manual: "ISP/User button
When pressed, this button connect sport pin P0_5 to ground. Hold this
button down while pressing and releasing Reset (S4) to force the
LPC55S69 into ISP mode."
Your device SWD interface should be disturbed by on chip applications you ever programed. For example, this happens if download low power mode applications which causes SWD disabled.
when LPC is in ISP mode, it bypass user application impact.Thus PC can communicate LPC via SWD interface.