void ows_spm()
{
uint8_t cmd = ows_recv();
uint16_t addr = ows_recv() << 8;
addr |= ows_recv();
switch(cmd) {
case 0x33: /* read program memory page */
ow_crc16_reset();
for(uint8_t i = 0; i < PGM_PAGE_SIZE; ++i) {
uint8_t c = pgm_read_byte_near(addr++);
ows_send(c);
ow_crc16_update(c);
}
addr = ow_crc16_get();
ows_send(addr >> 8);
ows_send(addr & 0xFF);
break;
case 0x3C: /* fill program memory page write buffer, return crc */
ow_crc16_reset();
for(uint8_t i = 0; i < PGM_PAGE_SIZE; i += 2) {
uint16_t w;
uint8_t c = ows_recv();
ow_crc16_update(c);
w = c << 8;
c = ows_recv();
w |= c;
boot_page_fill(addr + i, w);
}
addr = ow_crc16_get();
ows_send(addr >> 8);
ows_send(addr & 0xFF);
break;
case 0x5A: /* write page buffer */
write_page(addr);
ows_send(0);
ows_send(0);
ows_send(0);
break;
case 0xA5: /* read eeprom page */
break;
case 0xAA: /* write eeprom page */
break;
case 0xC3: /* jump to address */
break;
case 0xCC: /* read device id and page size */
break;
}
}
bool DS2408::updateCRC(){
// ((sDS2408*)(this->memory))->CRC = crc16( this->memory, 11 );
ow_crc16_reset();
for (int i=0;i<11;i++) ow_crc16_update(this->memory[i]);
((sDS2408*)(this->memory))->CRC = ow_crc16_get();
//Serial.print("CRC=");
//Serial.println( ((sDS2408*)(this->memory))->CRC, HEX);
}
bool DS2450::duty(OneWireHub * hub)
{
uint16_t memory_address;
uint16_t memory_address_start;
uint8_t b;
uint16_t crc;
ow_crc16_reset();
uint8_t done = hub->recv();
switch (done) {
// READ MEMORY
case 0xAA:
// Cmd
ow_crc16_update(0xAA);
// Adr1
b = hub->recv();
((uint8_t*)&memory_address)[0] = b;
ow_crc16_update(b);
// Adr2
b = hub->recv();
((uint8_t*)&memory_address)[1] = b;
ow_crc16_update(b);
memory_address_start = memory_address;
for (int i=0;i<8;i++){
uint8_t b = this->memory[memory_address+i];
hub->send(b);
}
crc = ow_crc16_get();
hub->send(((uint8_t*)&crc)[0]);
hub->send(((uint8_t*)&crc)[1]);
#ifdef DEBUG_DS2450
Serial.print("DS2450 : READ MEMORY : ");
Serial.println(memory_address_start, HEX);
#endif
break;
default:
#ifdef DEBUG_hint
Serial.print("DS2450=");
Serial.println(done, HEX);
#endif
break;
}
return TRUE;
}
bool DS2423::duty(OneWireHub * hub)
{
uint16_t memory_address;
uint16_t memory_address_start;
uint8_t b;
uint16_t crc;
ow_crc16_reset();
uint8_t done = hub->recv();
switch (done) {
// Read Memory + Counter
case 0xA5:
ow_crc16_update(0xA5);
// Adr1
b = hub->recv();
((uint8_t*)&memory_address)[0] = b;
ow_crc16_update(b);
// Adr2
b = hub->recv();
((uint8_t*)&memory_address)[1] = b;
ow_crc16_update(b);
memory_address_start = memory_address;
// data
for (int i=0;i<32;i++){
hub->send(0xff);
ow_crc16_update(0xff);
}
// cnt
hub->send(0x00);
ow_crc16_update(0x00);
hub->send(0x00);
ow_crc16_update(0x00);
hub->send(0x00);
ow_crc16_update(0x00);
hub->send(0x00);
ow_crc16_update(0x00);
// zero
hub->send(0x00);
ow_crc16_update(0x00);
hub->send(0x00);
ow_crc16_update(0x00);
hub->send(0x00);
ow_crc16_update(0x00);
hub->send(0x00);
ow_crc16_update(0x00);
// crc
crc = ow_crc16_get();
hub->send(((uint8_t*)&crc)[0]);
hub->send(((uint8_t*)&crc)[1]);
ow_crc16_reset();
#ifdef DEBUG_DS2423
Serial.print("DS2423 : Read Memory + Counter : ");
Serial.println(memory_address_start, HEX);
#endif
break;
default:
#ifdef DEBUG_hint
Serial.print("DS2423=");
Serial.println(done, HEX);
#endif
break;
}
return TRUE;
}
void ows_process_cmds()
{
uint16_t memory_address;
uint8_t b;
ow_crc16_reset();
switch(ows_recv())
{
case 0xAA: /* READ MEMORY */
ow_crc16_update(0xAA);
b = ows_recv();
((uint8_t*)&memory_address)[0] = b;
ow_crc16_update(b);
b = ows_recv();
((uint8_t*)&memory_address)[1] = b;
ow_crc16_update(b);
for(;;)
{
uint8_t b = ((uint8_t*)&memory)[memory_address];
ows_send(b);
ow_crc16_update(b);
if(errno)
break;
if((memory_address & 0x0F) == 0x0F) /* end of page */
{
uint16_t crc = ow_crc16_get();
ows_send(((uint8_t*)&crc)[0]);
ows_send(((uint8_t*)&crc)[1]);
ow_crc16_reset();
}
++memory_address;
if(memory_address >= sizeof(memory))
while(! errno)
ows_send(0xFF);
}
break;
case 0x55: /* WRITE MEMORY */
ow_crc16_update(0x55);
b = ows_recv();
((uint8_t*)&memory_address)[0] = b;
ow_crc16_update(b);
b = ows_recv();
((uint8_t*)&memory_address)[1] = b;
ow_crc16_update(b);
for(;;)
{
b = ows_recv();
if(errno)
break;
ow_crc16_update(b);
uint16_t crc = ow_crc16_get();
ows_send(((uint8_t*)&crc)[0]);
ows_send(((uint8_t*)&crc)[1]);
((uint8_t*)&memory)[memory_address] = b;
ows_send(b);
if(errno)
break;
++memory_address;
ow_crc16_reset();
ow_crc16_update(((uint8_t*)&memory_address)[0]);
ow_crc16_update(((uint8_t*)&memory_address)[1]);
}
break;
case 0x3C: /* CONVERT */
break;
default:
break;
}
}
