Why does my program run correctly in DS-5 but fails when it is loaded from flash? - Why does my program run correctly in DS-5 but fails when it is loaded from flash? Description If your software does not run correctly from flash check the code has not been compiled with Semihosting support enabled for I/O routines such as printf. Semihosting routes I/O commands such as printf to the debugger via specific libraries linked in at compile time. The software examples within SoCEDS/examples/software are configured to use semihosting by default. Resolution The Altera-SoCFPGA-HardwareLib-FPGA-CV-GNU within SoCEDS version 15.1 and later contains a #Define at the top of the Makefile to allow semihosting to be dissabaled or enabled. If Semihosting is disabled this example adds in a driver to route printf output through the UART. You can also manully disable C library semihosting functions by using the code below in your C or assembler modules: #pragma import(__use_no_semihosting_swi) //C module IMPORT __use_no_semihosting_swi //assembler module Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 15.1 15.0 ['Arria® V ST FPGA', 'Arria® V SX FPGA', 'Cyclone® V SE FPGA', 'Cyclone® V ST FPGA', 'Cyclone® V SX FPGA', 'Arria® 10 SX FPGA'] ['Embedded Dev Tools SoC Suite'] ['novalue'] ['novalue']