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answer build for voltage register

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This commit is contained in:
Rémi Heredero 2023-03-10 15:13:26 +01:00
parent d7d1d7021c
commit 9b271afdb2
1 changed files with 24 additions and 2 deletions
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26
modbus.c
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@ -40,12 +40,34 @@ void modbus_timer(void)
modbus_analyse_and_answer(); modbus_analyse_and_answer();
} }
extern uint16_t measure_voltage();
uint8_t modbus_analyse_and_answer(void) { uint8_t modbus_analyse_and_answer(void) {
// TODO -> complete the modbus analyse and answer // TODO -> complete the modbus analyse and answer
if(rx_buf[0] == modbusAddress){
tx_buf[0] = rx_buf[0];
tx_buf[1] = rx_buf[1];
switch(rx_buf[1]){
case READ_INPUT_REGISTERS:
tx_buf[2] = 2;
tx_buf[4] = input_registers[0];
tx_buf[3] = input_registers[0]>>8;
// todo choose register
break;
case READ_HOLDING_REGISTERS:
//todo
break;
case WRITE_SINGLE_REGISTER:
//todo
break;
// todo CRC
}
}
rx_buf[0] = 0; rx_buf[0] = 0;
// sprintf(tx_buf, "%i", modbusAddress, ); //
} }