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-rw-r--r--src/jtag/jtag.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/src/jtag/jtag.c b/src/jtag/jtag.c
index 0bc1c4ff..1456a5b5 100644
--- a/src/jtag/jtag.c
+++ b/src/jtag/jtag.c
@@ -995,6 +995,11 @@ static void jtag_examine_chain_display(enum log_levels level, const char *msg,
EXTRACT_MFG(idcode), EXTRACT_PART(idcode), EXTRACT_VER(idcode) );
}
+static bool jtag_idcode_is_final(u32 idcode)
+{
+ return idcode == 0x000000FF || idcode == 0xFFFFFFFF;
+}
+
/**
* This helper checks that remaining bits in the examined chain data are
* all as expected, but a single JTAG device requires only 64 bits to be
@@ -1008,7 +1013,7 @@ static void jtag_examine_chain_end(u8 *idcodes, unsigned count, unsigned max)
{
u32 idcode = buf_get_u32(idcodes, count, 32);
// do not trigger the warning if the data looks good
- if (!triggered && (idcode == 0x000000FF || idcode == 0xFFFFFFFF))
+ if (!triggered && jtag_idcode_is_final(idcode))
continue;
LOG_WARNING("Unexpected idcode after end of chain: %d 0x%08x",
count, idcode);
@@ -1055,7 +1060,7 @@ static int jtag_examine_chain(void)
* as AVR will output all 1's instead of TDI input value at
* end of chain.
*/
- if ((idcode == 0x000000FF)||(idcode == 0xFFFFFFFF))
+ if (jtag_idcode_is_final(idcode))
{
jtag_examine_chain_end(idcode_buffer,
bit_count + 32, JTAG_MAX_CHAIN_SIZE * 32);