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Return zero-fill packets when reading bitstreams 

Zero-fill packets are required in certain conditions to create valid
bitstreams.  When reading a bitstream, make sure they are yielded and
printed.

Signed-off-by: Rick Altherr <kc8apf@kc8apf.net>
This commit is contained in:
Rick Altherr 2018-01-22 13:31:32 -08:00
parent c894e1f123
commit 87d9538af9
1 changed files with 9 additions and 1 deletions
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10
lib/xilinx/xc7series/configuration_packet.cc
View File

@ -25,7 +25,11 @@ ConfigurationPacket::InitWithWords(absl::Span<uint32_t> words,
// NOPs. Since Type 0 packets don't exist according to
// UG470 and they seem to be zero-filled, just consume
// the bytes without generating a packet.
return {words.subspan(1), {}};
return {words.subspan(1),
{{header_type,
Opcode::NOP,
ConfigurationRegister::CRC,
{}}}};
case 0x1: {
Opcode opcode = static_cast<Opcode>(
bit_field_get(words[0], 28, 27));
@ -73,6 +77,10 @@ ConfigurationPacket::InitWithWords(absl::Span<uint32_t> words,
}
std::ostream& operator<<(std::ostream& o, const ConfigurationPacket& packet) {
if (packet.header_type() == 0x0) {
return o << "[Zero-pad]" << std::endl;
}
switch (packet.opcode()) {
case ConfigurationPacket::Opcode::NOP:
o << "[NOP]" << std::endl;