Assistance Needed: Loading Softdevice (S340) onto Seeed XIAO BLE Sense nRF52840 Board

Community
,
21

Ok, so it appears that the S340 SD simply needed more SRAM. Unfortunately on the xiao nrf52840 I don’t get any debug output to the serial (CDC TinyUSB) even if I compile with full debug. The fix was to use a larger RAM section in the linker file.

MEMORY
{

/* LENGTH = BOOT LOADER START - FLASH ORIGIN */

FLASH (rx) : ORIGIN = 0x31000, LENGTH = 0xF4000 - 0x31000

/* SRAM required by Softdevice depend on

    • Attribute Table Size (Number of Services and Characteristics)
    • Vendor UUID count
    • Max ATT MTU
    • Concurrent connection peripheral + central + secure links
    • Event Len, HVN queue, Write CMD queue
      */

RAM (rwx) : ORIGIN = 0x20004000, LENGTH = 0x3C000
}

I’m able to run create and run a BLE beacon on the SD340 soft device. Next up, I’ll try ANT