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alejoseb / Modbus-STM32-HAL-FreeRTOS

Modbus TCP and RTU, Master and Slave for STM32 using Cube HAL and FreeRTOS
GNU Lesser General Public License v2.1
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Slave Does not allow for memory space larger then 256 #6

Closed ZARichardWright closed 3 years ago

ZARichardWright commented 3 years ago

First off Great Library so far.

I would like to map more the 256 bytes to a modbus slave. I know this is the limit of any one transaction but still would like to have the option to map more. From what i can see the limit is first and for most the fact that u8regsize member of the modbusHandler_t is a uint8_t. I have sort got it working by just increasing this to a 16_t as well as all other locations where the address is cast to a 8_t. My question is am i missing another obvious method of allowing for a larger address space. as i would obviously preferer to try avoid deviating form current master.

Cheers

alejoseb commented 3 years ago

You are right about the transaction size and the memory map, the uint8_t was used in the original Arduino library and I did not change that. I think your approach to extend the memory map is correct, there is no other obvious method.

alejoseb commented 3 years ago

Solved in commit b2e6aa96