void decodeIt(void)
{
if(received[0] == SlaveAddress){
if(checkCRC()){
if(received[1] == 0x01){
readCoil();
}
else if(received[1] == 0x02){
readInputCoil();
}
else if(received[1] == 0x03){
readReg();
}
else if(received[1] == 0x04){
readInputReg();
}
else if(received[1] == 0x05){
writeCoil();
}
else if(received[1] == 0x06){
writeReg();
}
else if(received[1] == 0x10){
writeMultipleRegs();
}
else if(received[1] == 0x0F){
writeMultipleCoils();
}
else{
response[0] = 0; //error this does nothing though..
}
}
}
modbusMessage = 0;
}
/* Private function ----------------------------------------------------------*/
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
uint8_t cnt=0;
/* Set the Vector Table base adress at 0x8004000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x4000);
/* LED0 -> PB0 LED1 -> PB1 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// Initialize protocol stack in RTU mode for a slave with address 10 = 0x0A
// MB_RTU, Device ID: 1, USART portL: 1 (este configurat in portserial.h, Baud rate: 38400, Parity: NONE)
eMBInit(MB_RTU, 1, 1, 38400, MB_PAR_NONE);
// Enable the Modbus Protocol Stack.
eMBEnable();
while(1)
{
// Reset the flag. It will only be set if the modbus pooling has a request
Modbus_Request_Flag = 0;
// Call the main polling loop of the Modbus protocol stack.
eMBPoll();
if (Modbus_Request_Flag) GPIO_SetBits(GPIOB , GPIO_Pin_0);
Delay(0xffff);
if (Modbus_Request_Flag) GPIO_ResetBits(GPIOB , GPIO_Pin_0);
cnt++;
if (cnt == 4) \
{
writeInputRegister(1, 111);
writeInputRegister(2, 222);
writeInputRegister(98, 111);
writeInputRegister(99, 222);
writeHoldingRegister(1, 333);
writeHoldingRegister(2, 444);
writeHoldingRegister(98, 333);
writeHoldingRegister(99, 444);
writeCoil(1, 0);
writeCoil(2, 1);
writeCoil(58, 1);
writeCoil(59, 0);
}
if (cnt == 8)
{
writeInputRegister(1, 222);
writeInputRegister(2, 111);
writeInputRegister(98, 222);
writeInputRegister(99, 111);
writeHoldingRegister(1, 444);
writeHoldingRegister(2, 333);
writeHoldingRegister(98, 444);
writeHoldingRegister(99, 333);
writeCoil(1, 1);
writeCoil(2, 0);
writeCoil(58, 0);
writeCoil(59, 1);
cnt = 0;
}
}
}