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Hi, I'm developing a project using a PIC18F4550 microcontroller and an LM044L LCD display. I need a library that converts hexadecimal values (int) to decimals.
Then I will display these decimal value ...

I already read this post, but he did not help me.n Sad

In that case, maybe email CCS as it says. Usually they respond pretty fast during business hours.

okay

I already read this post, but he did not help me.n Sad

Hi, I'm developing a MODBUS RTU RS-485 Master-Slave project and I'm using the examples that are in the CCS folder.
I'm trying to compile the file ex_modbus_slave.c but the CCS gives the error 44.
Wh ...

Unfortunately, that is the part that you will need to do the work yourself. Start by building the hardware and writing the basic blinking program, and start building up from there. Use the code provid ...

Sorry for my ignorance, I'm

Yes, you need to define MODBUS_SERIAL_RX_ENABLE and MODBUS_SERIAL_ENABLE_PIN as two IO pins (c4 and c5)

You also need to define these two:
MODBUS_SERIAL_TX_PIN PIN_ ...

To be clear, Modbus is not something that you can throw together in a few minutes...

There's a lot to understand:
hardware protocol
communication protocol
your own hardware interface to the prot ...

They are not directly.

If you are the slave, _you_ determine what is sent for any particular
register request. It could be a value from a variable, or just a constant.
Completely up to you.
The ...

If you read modbus.c comments at the header, it also tells you what kind of defines you need to make to make it work. You have not done all of them. For example, the DE and RE pins are not defined.
...

You will need to provide a modbus master driver for the master and a slave driver for the slave.

read_holding_registers will put the contents of the slave's holding registers into modbus_rx.data
...

One thing: I say that you should use MODBUS_INT_RDA for this because I notice that you are using C6 and C7, which are the hardware UART pins. If you really intend to use MODBUS_INT_EXT then you should ...

I notice a few things:
1. your DE and RE pins are still set to your TX and RX pins in your code. You need to set the DE and RE pins to what they are connected to, and also tell the modbus driver that ...

I notice a few things:
1. your DE and RE pins are still set to your TX and RX pins in your code. You need to set the DE and RE pins to what they are connected to, and also tell the modbus driver that ...

Can you show your code? You need to show the full setup, where you are trying to read the Modbus register, and where you try and store the incoming data. Try and write the most minimal code you can to ...

GPIO = general purpose input/output

You need to fix your hardware first. Going on without the proper hookups guarantees that you have no chance of getting it working.

So before you start playing ...