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Stellaris® ARM® LM3S Microcontrollers Forum
LM3S3748 - USB boot loader problem
I was required to add an USB boot loader to my application that runs on LM3S3748 MCU.
I was trying to use the boot loader that was provided by the StellarisWare under the boot_usb example.
As required I have programmed the boot loader at the beginning of the flash, and my application at address 0x1800.I have also enabled the update via USB using #define USB_ENABLE_UPDATE.
In the main application I called the boot loader using the following command: (*((void (*)(void))(*(unsigned long *)0x2c)))();Every worked fine untill this point, When I plugged my device to PC it recognized the device as "unknown device" and I got USB error code 43.Also the LM Flash programmer could not recognize my device.
Please post your question only once on the General Discussions forum. The Suggestions forum is for people to offer suggestions for improvements in our products, software, or kits. The Sharing forum is for people to post code or solutions that they want to share with others. I have deleted the duplicate posts.
As for your question, do you have the PLL enabled and a system clock of at least 30 MHz?
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