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493 lines
9.0 KiB
C
493 lines
9.0 KiB
C
7 years ago
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#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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uint8_t my_address[4];
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uint8_t rind;
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uint16_t rcrc;
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uint8_t raddress[4];
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uint8_t rdest[4];
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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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uint8_t saddress[4];
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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 asent;
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uint8_t waitack;
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uint8_t gotack;
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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[0]=eeprom_read_byte((const uint8_t *)EESIZE-4);
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my_address[1]=eeprom_read_byte((const uint8_t *)EESIZE-3);
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my_address[2]=eeprom_read_byte((const uint8_t *)EESIZE-2);
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my_address[3]=eeprom_read_byte((const uint8_t *)EESIZE-1);
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if ((my_address[0] == 0xFF) &&
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(my_address[1] == 0xFF) &&
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(my_address[2] == 0xFF) &&
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(my_address[3] == 0xFF))
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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(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(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[0] = 0xFF;
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saddress[1] = 0xFF;
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saddress[2] = 0xFF;
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saddress[3] = 0xFF;
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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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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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readaddr();
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srand(my_address[3]);
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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[0] == my_address[0]) &&
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(rdest[1] == my_address[1]) &&
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(rdest[2] == my_address[2]) &&
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(rdest[3] == my_address[3]) &&
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((rctl & 0x13) == 0x11)) {
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if (waitack) {
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waitack = 0;
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gotack = 1;
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}
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return;
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}
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if ((rdest[0] == my_address[0]) &&
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(rdest[1] == my_address[1]) &&
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(rdest[2] == my_address[2]) &&
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(rdest[3] == my_address[3]) &&
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((rctl & 0x11) == 0x10)) {
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saddress[0] = raddress[0];
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saddress[1] = raddress[1];
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saddress[2] = raddress[2];
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saddress[3] = raddress[3];
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seq = (rctl >> 1) & 3;
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switch (rmessage[0]) {
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case '@':
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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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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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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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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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hbw_set_channel(rmessage[1], rlen - 2, &(rmessage[2]));
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case 'S':
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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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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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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()) {
|
||
|
|
announce();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
uint8_t hbw_send_channel(uint8_t channel, uint8_t length, uint8_t const * const data, uint32_t target_address)
|
||
|
|
{
|
||
|
|
if (gotack) {
|
||
|
|
gotack = 0;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!is_bus_free())
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
if (waitack)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
slen = length + 2;
|
||
|
|
sctl = 0xF8;
|
||
|
|
saddress[0] = eeprom_read_byte((const uint8_t *)2);
|
||
|
|
saddress[1] = eeprom_read_byte((const uint8_t *)3);
|
||
|
|
saddress[2] = eeprom_read_byte((const uint8_t *)4);
|
||
|
|
saddress[3] = eeprom_read_byte((const uint8_t *)5);
|
||
|
|
smessage[0] = 'i';
|
||
|
|
smessage[1] = channel;
|
||
|
|
memcpy(&(smessage[2]), data, length);
|
||
|
|
sendmsg();
|
||
|
|
waitack = 1;
|
||
|
|
gotack = 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
ISR(USART_RX_vect)
|
||
|
|
{
|
||
|
|
uint8_t c;
|
||
|
|
|
||
|
|
sdelay = hbw_timer + 100 + (rand() & 0x1F);
|
||
|
|
|
||
|
|
c = UDR0;
|
||
|
|
if (c == 0xFE) {
|
||
|
|
rind = 255;
|
||
|
|
resc = 0;
|
||
|
|
}
|
||
|
|
if (c == 0xFD) {
|
||
|
|
rind = 0;
|
||
|
|
resc = 0;
|
||
|
|
rready = 0;
|
||
|
|
rcrc =0xFFFF;
|
||
|
|
}
|
||
|
|
if (rind < 255) {
|
||
|
|
if (c == 0xFC) {
|
||
|
|
resc = 1;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (resc)
|
||
|
|
c = c | 0x80;
|
||
|
|
rcrc = crc16shift(rcrc, c);
|
||
|
|
resc = 0;
|
||
|
|
rind++;
|
||
|
|
}
|
||
|
|
if ((rind == 1) || (rind == 255))
|
||
|
|
return;
|
||
|
|
if (rind < 6) {
|
||
|
|
rdest[rind-2] = c;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (rind == 6) {
|
||
|
|
rctl = c;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (rind < 11) {
|
||
|
|
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;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
ISR(TIMER2_COMPA_vect)
|
||
|
|
{
|
||
|
|
cli();
|
||
|
|
hbw_timer++;
|
||
|
|
sei();
|
||
|
|
}
|