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Commit 2c4fb882 authored by Parthiban Nallathambi's avatar Parthiban Nallathambi Committed by Carles Cufí
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modbus: use macro for function code for input register 



use MODBUS_FC04_IN_REG_RD for input register reading function code 4.

Signed-off-by: default avatarParthiban Nallathambi <parthiban@linumiz.com>
parent 00dadc6c
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