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fix(i2c): saturate I2cMaster timeout counter #1471

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fix(i2c): saturate I2cMaster timeout counter #1471

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fix(i2c): saturate I2cMaster timeout counter
ruck314 Aug 18, 2026
1c403c4
Merge branch 'pre-release' into I2cMaster-patch
ruck314 Aug 27, 2026
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15 changes: 12 additions & 3 deletions protocols/i2c/rtl/I2cMaster.vhd
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Original file line number Diff line number Diff line change
Expand Up @@ -260,7 +260,10 @@ begin


when WAIT_ADDR_ACK_S =>
v.timer := r.timer + 1;
-- Saturate the timer to prevent an out of range value
if (r.timer /= TIMEOUT_C) then
v.timer := r.timer + 1;
end if;

if (byteCtrlOut.cmdAck = '1') then -- Master sent the command
if (byteCtrlOut.ackOut = '0') then -- Slave ack'd the transfer
Expand Down Expand Up @@ -302,7 +305,10 @@ begin


when WAIT_READ_DATA_S =>
v.timer := r.timer + 1;
-- Saturate the timer to prevent an out of range value
if (r.timer /= TIMEOUT_C) then
v.timer := r.timer + 1;
end if;

v.byteCtrlIn.stop := r.byteCtrlIn.stop; -- Hold stop or it wont get seen
v.byteCtrlIn.ackIn := r.byteCtrlIn.ackIn; -- This too
Expand Down Expand Up @@ -331,7 +337,10 @@ begin
end if;

when WAIT_WRITE_ACK_S =>
v.timer := r.timer + 1;
-- Saturate the timer to prevent an out of range value
if (r.timer /= TIMEOUT_C) then
v.timer := r.timer + 1;
end if;

v.byteCtrlIn.stop := r.byteCtrlIn.stop;
if (byteCtrlOut.cmdAck = '1') then -- Master sent the command
Expand Down