Table of Contents
ICnetAdr()
ICnetAdr() sets the start addresses of M, D and R memory.
void ICnetAdr(uint16_t m_offset, uint16_t d_offset, uint16_t r_offset = 0)
Commands
| Command | Arguments | Return Value | Operation |
|---|---|---|---|
ICnetAdr(m_offset, d_offset, r_offset) | uint16_t m_offsetuint16_t d_offsetuint16_t r_offset = 0 | void | Sets the start addresses of M, D and R memory. |
Example
This example uses the MPINO-16A8R8T RS-485 port Serial2, input D22, and transistor output D39.
void setup() { ICnetMem(64, 64, 16); // Set the M·D·R memory sizes used by Cnet Slave. ICnetAdr(0, 0, 0); // Set the start addresses of M·D·R memory. ICnetInit(Serial2, 1, 9600); // Set the communication port, station number and baud rate. if (M != nullptr) M[0] = false; } void loop() { ICnet(); // Check incoming requests and process Cnet Slave responses. if (M != nullptr) M[0] = digitalRead(22) == HIGH; if (D != nullptr) digitalWrite(39, D[0] ? HIGH : LOW); }
Precautions
- Keep calling
ICnet()inloop(). - Set M/D/R sizes within the available SRAM.
- When sharing memory with Modbus, check for duplicate allocation and address conventions. Both
ICnetMem()andImodbusRTUMem()reallocate sharedM/D. Assign final size management to only one of them and initialize both protocols after the last reallocation. - Allocation functions do not return success status. Check whether
M,DandRarenullptrbefore accessing them in user code.