Content originally posted in LPCWare by Carrigan on Wed Jul 18 08:42:46 MST 2012 Hello-
I have made a custom USB application board of an LP1342/43 based off of the Olimex P1343 board (https://www.olimex.com/dev/pdf/ARM/LPC/LPC-P1343-schematic.pdf). I prototyped using the P1343 board and everything worked fine, but now that my custom boards are here and populated I am having a problem where I can flash the 1342 (didn't need the full 32k of flash the 1343 offers), but when I plug it into a computer it still enumerates as the MSC bootloader. Both pin 0_3 and 0_1 are left floating, as can be seen in the following image of my circuit.
I am programming the circuit successfully using the JTAG header with a Segger JLink. When the USB bootloader does come up, I can check the contents of the .bin file and see that my program is in fact on there, so why won't it run when I plug it into USB?
Can anyone provide me some feedback to help troubleshoot this?
Content originally posted in LPCWare by serge on Wed Jul 18 13:22:51 MST 2012 My idea: It is never a good idea to leave GPIO0_1 and GPIO0_3 floating. That is asking for problems. Use pullups to avoid starting ISP mode and your program will run provided the .bin file is a valid one.:p
Content originally posted in LPCWare by ex-kayoda on Wed Jul 18 09:05:18 MST 2012 Did you try to pullup ISP (PIO0.1) and ground it for ISP (with VBUS high) already?
