Content originally posted in LPCWare by ECamino on Thu May 05 08:00:09 MST 2016
We're trying to use the Y2 crystal for the clock on an LPC824Max board. Using LPCOpen "LPCXpresso824-MAX board" v2.19 (the last version).
I removed the 0-ohm resistors at SJ3 and SJ4, and solder-jumped SJ3 1&2 and SJ4 1&2.
I have continuity on Y2 to pins 17 and 18 on the LPC824 chip.
Using LPCOpen project for LPC824 "periph_wwdt"
In file "lpc_board_nxp_lpcxpresso_824\board_sysinit.c", line 68, I commented "Chip_SetupIrcClocking();" and added line "Chip_SetupXtalClocking();"
I build debug (using LPCLink on an LPCxpresso 800 board) and I can see it hangs at sysinit_8xx.c, line 78: "while (!Chip_Clock_IsSystemPLLLocked()){}"
I checked the Y2 signal with a scope, and there is no crystal signal from either Y2 pad.
What do I have to do to enable the crystal clock on an LPC824 Max board?
Thanks,
EC
