From 28620f8ce9c14a48ede6d8bf00cbe61d6d2e4124 Mon Sep 17 00:00:00 2001
From: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Date: Sat, 6 Nov 2021 08:37:14 +0100
Subject: [PATCH] altera: check file type: for an unknown type user has to
 explicitly provides flash mode fails otherwise

---
 src/altera.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/altera.cpp b/src/altera.cpp
index 3c911eb..ca19178 100644
--- a/src/altera.cpp
+++ b/src/altera.cpp
@@ -42,8 +42,16 @@ Altera::Altera(Jtag *jtag, const std::string &filename,
 					_mode = Device::MEM_MODE;
 				else
 					_mode = Device::SPI_MODE;
-			} else {
-				_mode = Device::SPI_MODE;
+			} else { // unknown type -> sanity check
+				if (prg_type == Device::WR_SRAM) {
+					printError("file has an unknown type:");
+					printError("\tplease use rbf or svf file");
+					printError("\tor use --write-flash with: ", false);
+					printError("-b board_name or --fpga_part xxxx");
+					std::runtime_error("Error: wrong file");
+				} else {
+					_mode = Device::SPI_MODE;
+				}
 			}
 		}
 	}