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605 lines
11 KiB
C
605 lines
11 KiB
C
#include "hw.h"
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include <avr/eeprom.h>
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#include <stdlib.h>
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#include <string.h>
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#include "hbw.h"
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uint32_t my_address;
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uint8_t rind;
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uint16_t rcrc;
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uint32_t raddress;
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uint32_t rdest;
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uint8_t resc;
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uint8_t rctl;
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volatile uint8_t rready;
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uint8_t rmessage[62];
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uint8_t rlen;
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uint8_t sind;
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uint8_t sdisc;
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uint8_t sctl;
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uint16_t scrc;
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uint8_t sesc;
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uint32_t saddress;
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uint8_t slen;
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uint8_t smessage[62];
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uint16_t sdelay;
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uint8_t waitack;
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uint32_t aaddress;
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uint8_t asent;
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uint8_t gotack;
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uint8_t configled;
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uint8_t configbutton;
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uint8_t configstate;
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uint16_t configtimer;
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static uint16_t crc16shift(uint16_t crc, uint8_t data)
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{
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int stat, i;
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for (i=0; i<8; i++) {
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stat = crc & 0x8000;
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crc = crc << 1;
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if (data & 0x80)
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crc = crc | 1;
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if (stat)
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crc = crc ^ 0x1002;
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data = data << 1;
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}
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return crc;
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}
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static void readaddr(void)
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{
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// my_address=eeprom_read_dword((const uint32_t *)EESIZE-4);
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((uint8_t*)&my_address)[0]=eeprom_read_byte((const uint8_t *)EESIZE-4);
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((uint8_t*)&my_address)[1]=eeprom_read_byte((const uint8_t *)EESIZE-3);
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((uint8_t*)&my_address)[2]=eeprom_read_byte((const uint8_t *)EESIZE-2);
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((uint8_t*)&my_address)[3]=eeprom_read_byte((const uint8_t *)EESIZE-1);
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if (my_address == 0xFFFFFFFF)
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((uint8_t*)&my_address)[0] = 0x42;
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}
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static void send(uint8_t i,uint8_t crc)
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{
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if (bit_is_set(UCSR0A, UDRE0)) {
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if (sesc) {
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UDR0 = i & 0x7F;
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sind++;
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sesc = 0;
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return;
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}
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if (crc == 1) {
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scrc = crc16shift(scrc, i);
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}
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if (crc == 2) {
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scrc = crc16shift(scrc, 0);
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scrc = crc16shift(scrc, 0);
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i = (scrc >> 8) & 0xFF;
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}
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if ((i == 0xFD) || (i == 0xFC) || (i == 0xFE)) {
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UDR0 = 0xFC;
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sesc = 1;
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return;
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}
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UDR0 = i;
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sind++;
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}
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}
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void rloop(void)
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{
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if (!sind)
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return;
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if (sdisc) {
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if (sind == 1) {
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send(0x04,1);
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return;
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}
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if (sind == 2) {
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send(0x01,1);
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return;
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}
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if (sind == 3) {
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send((scrc >> 8) & 0xFF,2);
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return;
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}
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if (sind == 4) {
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send(scrc & 0xFF,0);
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return;
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}
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if (bit_is_set(UCSR0A, TXC0)) {
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PORTD &= ~(1<<SenderEnable);
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PORTD &= ~(1<<ReceiverDisable);
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sind = 0;
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sdisc = 0;
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}
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return;
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}
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if (sind < 5) {
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send(((uint8_t*)&saddress)[sind-1],1);
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return;
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}
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if (sind == 5) {
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send(sctl,1);
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return;
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}
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if (sind < 10) {
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send(((uint8_t*)&my_address)[sind-6],1);
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return;
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}
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if (sind == 10) {
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send(slen+2,1);
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return;
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}
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if (sind < slen+10) {
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send(smessage[sind-11],1);
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return;
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}
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if (sind == slen+10) {
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send(smessage[sind-11],1);
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return;
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}
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if (sind == slen+11) {
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send((scrc >> 8) & 0xFF,2);
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return;
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}
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if (sind == slen+12) {
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send(scrc & 0xFF,0);
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return;
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}
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if (bit_is_set(UCSR0A, TXC0)) {
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PORTD &= ~(1<<SenderEnable);
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PORTD &= ~(1<<ReceiverDisable);
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sind = 0;
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}
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}
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static uint8_t sendmsg(void)
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{
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if (sind)
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return 0;
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PORTD |= (1<<SenderEnable);
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PORTD |= (1<<ReceiverDisable);
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UCSR0A = (1<<TXC0);
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scrc = crc16shift(0xFFFF, 0xFD);
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UDR0 = 0xFD;
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sind = 1;
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sesc = 0;
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sdisc = 0;
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return ~0;
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}
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static uint8_t senddsc(void)
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{
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if (sind)
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return 0;
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PORTD |= (1<<SenderEnable);
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PORTD |= (1<<ReceiverDisable);
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UCSR0A = (1<<TXC0);
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scrc = crc16shift(0xFFFF, 0xFE);
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UDR0 = 0xFE;
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sind = 1;
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sesc = 0;
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sdisc = 1;
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return ~0;
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}
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static uint8_t is_bus_free(void)
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{
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if(sdelay - hbw_timer > 0x7FFF)
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return 1;
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return 0;
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}
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static void announce(void)
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{
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sctl = 0xF8;
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saddress = 0xFFFFFFFF;
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slen = 16;
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smessage[0] = 0x41;
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smessage[1] = 0;
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smessage[2] = HBWTYPE;
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smessage[3] = 0;
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smessage[4] = HBWMAJOR;
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smessage[5] = HBWMINOR;
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smessage[6] = HBWSERIAL0;
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smessage[7] = HBWSERIAL1;
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smessage[8] = HBWSERIAL2;
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smessage[9] = HBWSERIAL3;
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smessage[10] = HBWSERIAL4;
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smessage[11] = HBWSERIAL5;
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smessage[12] = HBWSERIAL6;
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smessage[13] = HBWSERIAL7;
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smessage[14] = HBWSERIAL8;
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smessage[15] = HBWSERIAL9;
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sendmsg();
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asent = 1;
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}
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void hbw_init(void)
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{
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DDRD |= (1<<SenderEnable);
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DDRD |= (1<<ReceiverDisable);
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PORTD &= ~(1<<SenderEnable);
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PORTD &= ~(1<<ReceiverDisable);
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#ifdef ConfigButton
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DDRD &= ~(1<<ConfigButton);
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PORTD |= (1<<ConfigButton);
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#endif
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#ifdef ConfigLED
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DDRD |= (1<<ConfigLED);
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PORTD &= ~(1<<ConfigLED);
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#endif
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UBRR0L = ((F_CPU/(BAUDRATE*16))-1) & 0xFF;
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UBRR0H = 0;
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UCSR0B = (1 << TXEN0) | (1 << RXEN0) | (1 << RXCIE0);
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UCSR0C = (1 << UPM01) | (1 << UCSZ01) | (1 << UCSZ00);
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OCR2A = 0xF9;
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TIMSK2 |= (1 << OCIE2A);
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TCCR2A |= (1 << WGM21);
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TCCR2B = TCCR2B | (1 << CS21) | (1 << CS20);
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rind = 0;
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sind = 0;
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sdisc = 0;
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rready = 0;
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asent = 0;
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hbw_timer = 0;
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gotack = 0;
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waitack = 0;
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configled = 0;
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configbutton = 0;
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configstate = 0;
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readaddr();
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srand(my_address);
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sdelay = 1000 + (rand() & 0x1F);
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sei();
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}
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static void process(void)
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{
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uint8_t seq,i;
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uint16_t addr;
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if ((rdest == my_address) &&
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(raddress == aaddress) &&
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waitack) {
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waitack = 0;
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gotack = 1;
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}
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if ((rdest == my_address) &&
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((rctl & 0x11) == 0x10)) {
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saddress = raddress;
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seq = (rctl >> 1) & 3;
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if(!rlen)
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return;
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switch (rmessage[0]) {
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case '@':
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if (rlen != 6)
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return;
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if (rmessage[1] == 'a') {
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eeprom_write_byte((uint8_t *)EESIZE-4, rmessage[2]);
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eeprom_write_byte((uint8_t *)EESIZE-3, rmessage[3]);
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eeprom_write_byte((uint8_t *)EESIZE-2, rmessage[4]);
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eeprom_write_byte((uint8_t *)EESIZE-1, rmessage[5]);
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readaddr();
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}
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slen = 0;
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sctl = 0x19 | (seq << 5);
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sendmsg();
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break;
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case 'h':
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smessage[0] = HBWTYPE;
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smessage[1] = 0;
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slen = 2;
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sctl = 0x18 | (seq << 5);
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sendmsg();
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break;
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case 'n':
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smessage[0] = HBWSERIAL0;
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smessage[1] = HBWSERIAL1;
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smessage[2] = HBWSERIAL2;
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smessage[3] = HBWSERIAL3;
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smessage[4] = HBWSERIAL4;
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smessage[5] = HBWSERIAL5;
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smessage[6] = HBWSERIAL6;
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smessage[7] = HBWSERIAL7;
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smessage[8] = HBWSERIAL8;
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smessage[9] = HBWSERIAL9;
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slen = 10;
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seq = (rctl >> 1) & 3;
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sctl = 0x18 | (seq << 5);
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sendmsg();
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break;
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case 'v':
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if (rlen != 2)
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return;
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smessage[0] = HBWMAJOR;
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smessage[1] = HBWMINOR;
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slen = 2;
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seq = (rctl >> 1) & 3;
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sctl = 0x18 | (seq << 5);
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sendmsg();
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break;
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case 'R':
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if (rlen != 4)
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return;
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if (rmessage[3] > 62)
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return;
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addr = (rmessage[1] >> 8) | rmessage[2];
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for (i = 0; i < rmessage[3]; i++)
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smessage[i] = eeprom_read_byte((const uint8_t *)addr+i);
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slen = rmessage[3];
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seq = (rctl >> 1) & 3;
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sctl = 0x18 | (seq << 5);
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sendmsg();
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break;
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case 'W':
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if (rlen <= 4)
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return;
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if (rlen != rmessage[3] + 4)
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return;
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addr = (rmessage[1] >> 8) | rmessage[2];
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for (i = 0; i < rmessage[3]; i++)
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eeprom_write_byte((uint8_t *)addr+i, rmessage[4+i]);
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slen = 0;
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sctl = 0x19 | (seq << 5);
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sendmsg();
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break;
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case 'x':
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case 's':
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if (rlen <= 2)
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return;
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hbw_set_channel(rmessage[1], rlen - 2, &(rmessage[2]));
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case 'S':
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if (rlen < 2)
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return;
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smessage[0] = 'i';
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smessage[1] = rmessage[1];
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slen = hbw_get_channel(rmessage[1], &(smessage[2])) + 2;
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seq = (rctl >> 1) & 3;
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sctl = 0x18 | (seq << 5);
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sendmsg();
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break;
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case 'C':
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hbw_read_config();
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slen = 0;
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sctl = 0x19 | (seq << 5);
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sendmsg();
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break;
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}
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}
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}
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static void eeprom_clear(void)
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{
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uint16_t i;
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for (i=0; i < EESIZE-4; i++)
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eeprom_write_byte((uint8_t *)i, 0xFF);
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}
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void hbw_loop(void)
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{
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rloop();
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if (rready) {
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process();
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rready = 0;
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}
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if (!asent) {
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if (is_bus_free()) {
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announce();
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}
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}
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#ifdef ConfigButton
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switch (configstate) {
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case 0:
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if (bit_is_clear(PIND, ConfigButton)) {
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configtimer = hbw_timer;
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configstate = 1;
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configled = 1;
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}
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break;
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case 1:
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if (((hbw_timer - configtimer) > 20) &&
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(bit_is_set(PIND, ConfigButton))) {
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asent = 0;
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configstate = 2;
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configtimer = hbw_timer;
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}
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if ((hbw_timer - configtimer) > 8000) {
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configstate = 3;
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configtimer = hbw_timer;
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}
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break;
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case 2:
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if ((hbw_timer - configtimer) > 2000) {
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configstate = 0;
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configled = 0;
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}
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break;
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case 3:
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configled = ((hbw_timer % 400) > 200)?0:1;
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if (bit_is_set(PIND, ConfigButton)) {
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configstate = 4;
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configtimer = hbw_timer;
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}
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break;
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case 4:
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configled = ((hbw_timer % 400) > 200)?0:1;
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if (((hbw_timer - configtimer) > 2000) &&
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(bit_is_set(PIND, ConfigButton))) {
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configstate = 0;
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configled = 0;
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}
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if (((hbw_timer - configtimer) > 20) &&
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(bit_is_clear(PIND, ConfigButton))) {
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configstate = 5;
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configled = 0;
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eeprom_clear();
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}
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break;
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case 5:
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if (((hbw_timer - configtimer) > 20) &&
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(bit_is_set(PIND, ConfigButton))) {
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configstate = 0;
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configled = 0;
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asent = 0;
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}
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}
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#endif
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#ifdef ConfigLED
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if (configled)
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PORTD |= (1<<ConfigLED);
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else
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PORTD &= ~(1<<ConfigLED);
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#endif
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}
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uint8_t hbw_send_channel(uint8_t channel, uint8_t length, uint8_t const * const data, uint32_t target_address)
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{
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if (gotack) {
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gotack = 0;
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waitack = 0;
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return 1;
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}
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if (!is_bus_free())
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return 0;
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if(waitack > 2) {
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waitack = 0;
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return 2;
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}
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slen = length + 2;
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sctl = 0xF8;
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aaddress = target_address;
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if(aaddress == 0) {
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((uint8_t*)&aaddress)[0]=eeprom_read_byte((const uint8_t *)2);
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((uint8_t*)&aaddress)[1]=eeprom_read_byte((const uint8_t *)3);
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((uint8_t*)&aaddress)[2]=eeprom_read_byte((const uint8_t *)4);
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((uint8_t*)&aaddress)[3]=eeprom_read_byte((const uint8_t *)5);
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// aaddress = eeprom_read_dword((const uint32_t *)2);
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}
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saddress = aaddress;
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smessage[0] = 'i';
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smessage[1] = channel;
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memcpy(&(smessage[2]), data, length);
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sendmsg();
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if (aaddress == 0xFFFFFFFF)
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return 1;
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waitack++;
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gotack = 0;
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sdelay = hbw_timer + 100 + (rand() & 0x1F);
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return 0;
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}
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ISR(USART_RX_vect)
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{
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uint8_t c;
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sdelay = hbw_timer + 100 + (rand() & 0x1F);
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c = UDR0;
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if (c == 0xFE) {
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rind = 255;
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resc = 0;
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}
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if (c == 0xFD) {
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rind = 0;
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resc = 0;
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rready = 0;
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rcrc =0xFFFF;
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}
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if (rind < 255) {
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if (c == 0xFC) {
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resc = 1;
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return;
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}
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if (resc)
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c = c | 0x80;
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rcrc = crc16shift(rcrc, c);
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resc = 0;
|
|
rind++;
|
|
}
|
|
if ((rind == 1) || (rind == 255))
|
|
return;
|
|
if (rind < 6) {
|
|
((uint8_t*)&rdest)[rind-2] = c;
|
|
return;
|
|
}
|
|
if (rind == 6) {
|
|
rctl = c;
|
|
return;
|
|
}
|
|
if (rind < 11) {
|
|
((uint8_t*)&raddress)[rind-7] = c;
|
|
return;
|
|
}
|
|
if (rind == 11) {
|
|
rlen = c;
|
|
return;
|
|
}
|
|
if ((rlen < 2) || (rlen > 64)) {
|
|
rind = 255;
|
|
return;
|
|
}
|
|
if ((rind < rlen + 10)) {
|
|
rmessage[rind-12] = c;
|
|
return;
|
|
}
|
|
if (rind == rlen + 10)
|
|
return;
|
|
if (rind == rlen + 11) {
|
|
rind = 255;
|
|
if (rcrc)
|
|
return;
|
|
rready = 1;
|
|
rlen = rlen - 2;
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
ISR(TIMER2_COMPA_vect)
|
|
{
|
|
cli();
|
|
hbw_timer++;
|
|
sei();
|
|
}
|