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152 lines
4.4 KiB
C
152 lines
4.4 KiB
C
#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/wdt.h> // WatchDog
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#include <stdint.h>
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#include <string.h>
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#include "avrIOhelper/io-helper.h"
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#include "millis.h"
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#include "uart.h"
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#include "modbus.h"
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//FUNC headers
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static void avr_init(void);
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void timer0_init(void);
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void timer2_init(void);
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void print_network_information(void);
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void modbusGet(void) {
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if (modbusGetBusState() & (1<<ReceiveCompleted))
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{
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switch(rxbuffer[1]) {
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case fcPresetSingleRegister:
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case fcPresetMultipleRegisters:
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case fcReadHoldingRegisters:
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//;
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//uint16_t test;
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//modbusExchangeRegisters(&test,0,1);
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modbusExchangeRegisters((void *)outStates,0,NUMBER_OF_INPUT_BYTES/2);
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break;
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case fcReadInputRegisters:
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if(modbusRequestedAddress() < 100)
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modbusExchangeRegisters((void *)inStates,0,NUMBER_OF_INPUT_BYTES/2);
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else if(modbusRequestedAddress() < 200)
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modbusExchangeRegisters((void *)inStatesBothEdges,100,NUMBER_OF_INPUT_BYTES/2);
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else if(modbusRequestedAddress() < 300)
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modbusExchangeRegisters((void *)inStatesFallingEdge,200,NUMBER_OF_INPUT_BYTES/2);
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else if(modbusRequestedAddress() < 400)
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modbusExchangeRegisters((void *)inStatesRisingEdge,300,NUMBER_OF_INPUT_BYTES/2);
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break;
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case fcReadInputStatus:
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if(modbusRequestedAddress() < 100)
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modbusExchangeBits(inStates,0,NUMBER_OF_INPUT_BYTES*8);
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else if(modbusRequestedAddress() < 200)
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modbusExchangeBits(inStatesBothEdges,100,NUMBER_OF_INPUT_BYTES*8);
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else if(modbusRequestedAddress() < 300)
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modbusExchangeBits(inStatesFallingEdge,200,NUMBER_OF_INPUT_BYTES*8);
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else if(modbusRequestedAddress() < 400)
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modbusExchangeBits(inStatesRisingEdge,300,NUMBER_OF_INPUT_BYTES*8);
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break;
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case fcForceMultipleCoils:
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case fcForceSingleCoil:
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case fcReadCoilStatus:
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if(modbusRequestedAddress() < 100)
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modbusExchangeBits(outStates,0,NUMBER_OF_INPUT_BYTES*8);
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else if(modbusRequestedAddress() < 200)
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modbusExchangeBits(outStatesBlinking,100,NUMBER_OF_INPUT_BYTES*8);
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break;
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default:
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modbusSendException(ecIllegalFunction);
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break;
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}
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}
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}
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int main()
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{
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// INIT MCU
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avr_init();
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ioHelperInitBuffer();
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ioHelperIoConf();
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modbusSetAddress(4);
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modbusInit();
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timer2_init();
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uint32_t timer_blink_outs = millis();
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set_Output(LED_EXTR_FEHLER, BLINK);
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printf("moin\n");
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while(1)
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{
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wdt_reset(); // WDT reset at least every sec
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ioHelperReadPins();
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ioHelperDebounce();
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ioHelperEdgeDetector();
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modbusGet();
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// Toggle all outs which are set to blinking
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if(millis() - timer_blink_outs > 500){
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outStates[0] ^= outStatesBlinking[0];
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outStates[1] ^= outStatesBlinking[1];
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outStates[2] ^= outStatesBlinking[2];
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outStates[2] ^= outStatesBlinking[3];
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timer_blink_outs = millis();
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printf("bus state: %d\n", modbusGetBusState());
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printf("DE /RE state: %d\n", PORTJ & (_BV(5)|_BV(6)) );
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}
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ioHelperSetOuts();
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}
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}
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// Timer0
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// 1ms IRQ
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// Used for millis() timing
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void timer0_init()
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{
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TCCR0A = (1<<WGM01); //TIMER0 SET-UP: CTC MODE
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TCCR0B = (1<<CS01)|(1<<CS00); // PS 1:64
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OCR0A = 249; // 1ms reach for clear (16mz:64=>250kHz:250-=>1kHz)
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TIMSK0 |= 1<<OCIE0A; //IRQ on TIMER0 output compareA
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}
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void timer2_init()
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{
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TCCR2A = (1<<WGM21); //TIMER0 SET-UP: CTC MODE
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TCCR2B|=(1<<CS21); //prescaler 8
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OCR2A = 200;
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TIMSK2|=(1<<OCIE2A);
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}
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static void avr_init(void)
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{
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// Initialize device here.
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// WatchDog INIT
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wdt_enable(WDTO_8S); // set up wdt reset interval 2 second
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wdt_reset(); // wdt reset ~ every <2000ms
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timer0_init();// Timer0 millis engine init
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//timer3_init();
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uart_init();
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sei(); //re-enable global interrupts
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return;
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}
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ISR(TIMER2_COMPA_vect) { //this ISR is called 9765.625 times per second
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modbusTickTimer();
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}
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