From 8b021bdd3acb39b2aa2c249537af4c31e5337ee1 Mon Sep 17 00:00:00 2001
From: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Date: Fri, 4 Oct 2019 08:25:37 +0200
Subject: [PATCH] ftdijtag: add shiftIR variant with value passed by value
 instead of ref. Used when the command is up to 8bits with no read

---
 ftdijtag.cpp | 9 +++++++++
 ftdijtag.hpp | 1 +
 2 files changed, 10 insertions(+)

diff --git a/ftdijtag.cpp b/ftdijtag.cpp
index 6d49740..cd2ea41 100644
--- a/ftdijtag.cpp
+++ b/ftdijtag.cpp
@@ -302,6 +302,15 @@ int FtdiJtag::shiftDR(unsigned char *tdi, unsigned char *tdo, int drlen, int end
 	return 0;
 }
 
+int FtdiJtag::shiftIR(unsigned char tdi, int irlen, int end_state)
+{
+	if (irlen > 8) {
+		cerr << "Error: this method this direct char don't support more than 1 byte" << endl;
+		return -1;
+	}
+	return shiftIR(&tdi, NULL, irlen, end_state);
+}
+
 int FtdiJtag::shiftIR(unsigned char *tdi, unsigned char *tdo, int irlen, int end_state)
 {
 	display("%s: avant shiftIR\n", __func__);
diff --git a/ftdijtag.hpp b/ftdijtag.hpp
index 791e538..e5760aa 100644
--- a/ftdijtag.hpp
+++ b/ftdijtag.hpp
@@ -15,6 +15,7 @@ class FtdiJtag : public FTDIpp_MPSSE {
 	int detectChain(std::vector<int> &devices, int max_dev);
 
 	int shiftIR(unsigned char *tdi, unsigned char *tdo, int irlen, int end_state = RUN_TEST_IDLE);
+	int shiftIR(unsigned char tdi, int irlen, int end_state = RUN_TEST_IDLE);
 	int shiftDR(unsigned char *tdi, unsigned char *tdo, int drlen, int end_state = RUN_TEST_IDLE);
 	int read_write(unsigned char *tdi, unsigned char *tdo, int len, char last);