void send_dimmer_status(void)
{
UART_PUTS("Sending Dimmer Status:\r\n");
inc_packetcounter();
uint8_t bri = (uint8_t)current_brightness;
// Set packet content
pkg_header_init_dimmer_brightness_status();
pkg_header_set_senderid(device_id);
pkg_header_set_packetcounter(packetcounter);
msg_dimmer_brightness_set_brightness(bri);
pkg_header_calc_crc32();
UART_PUTF("CRC32 is %lx (added as first 4 bytes)\r\n", getBuf32(0));
UART_PUTF("Brightness: %u%%\r\n", bri);
rfm12_send_bufx();
}
int main ( void )
{
uint8_t aes_key_nr;
uint8_t loop = 0;
uint8_t loop2 = 0;
uint8_t data[22];
sbi(LED_DDR, LED_PIN);
// delay 1s to avoid further communication with uart or RFM12 when my programmer resets the MC after 500ms...
_delay_ms(1000);
request_queue_init();
// read packetcounter, increase by cycle and write back
packetcounter = eeprom_read_dword((uint32_t*)EEPROM_POS_PACKET_COUNTER) + PACKET_COUNTER_WRITE_CYCLE;
eeprom_write_dword((uint32_t*)0, packetcounter);
uart_init(true);
UART_PUTS ("\r\n");
UART_PUTS ("Open Home Control Base Station V1.0\r\n");
UART_PUTS ("(c) 2012 Uwe Freese, www.open-home-control.com\r\n");
UART_PUTF ("Packet counter: %lu\r\n", packetcounter);
UART_PUTS ("Waiting for incoming data. Press h for help.\r\n");
rfm12_init();
sei();
// ENCODE TEST
/*
uint8_t testlen = 64;
eeprom_read_block (aes_key, (uint8_t *)EEPROM_POS_AES_KEY, 32);
UART_PUTS("Using AES key ");
printbytearray((uint8_t *)aes_key, 32);
UART_PUTS("Before encryption: ");
printbytearray(bufx, testlen);
unsigned long crc = crc32(bufx, testlen);
UART_PUTF("CRC32 is %lx (added as last 4 bytes)\r\n", crc);
UART_PUTS("1\r\n");
crc = crc32(bufx, testlen - 4);
UART_PUTS("2\r\n");
setBuf32(testlen - 4, crc);
UART_PUTS("Before encryption (CRC added): ");
printbytearray(bufx, testlen);
UART_PUTS("1\r\n");
uint8_t aes_byte_count = aes256_encrypt_cbc(bufx, testlen);
UART_PUTS("2\r\n");
UART_PUTS("After encryption: ");
printbytearray(bufx, aes_byte_count);
UART_PUTF("String len = %u\r\n", aes_byte_count);
UART_PUTS("1\r\n");
aes256_decrypt_cbc(bufx, aes_byte_count);
UART_PUTS("2\r\n");
UART_PUTS("After decryption: ");
printbytearray(bufx, testlen);
crc = getBuf32(testlen - 4);
UART_PUTF("CRC32 is %lx (last 4 bytes from decrypted message)\r\n", crc);
printbytearray(bufx, testlen);
UART_PUTS("After decryption (CRC removed): ");
printbytearray(bufx, testlen);
UART_PUTF("String len = %u\r\n", testlen);
while(1);
*/
while (42)
{
if (rfm12_rx_status() == STATUS_COMPLETE)
{
uint8_t len = rfm12_rx_len();
if ((len == 0) || (len % 16 != 0))
{
UART_PUTF("Received garbage (%u bytes not multiple of 16): ", len);
printbytearray(bufx, len);
}
else // try to decrypt with all keys stored in EEPROM
{
uint32_t assumed_crc;
uint32_t actual_crc;
for(aes_key_nr = 0; aes_key_nr < AES_KEY_EEPROM_COUNT ; aes_key_nr++)
{
//strncpy((char *)bufx, (char *)rfm12_rx_buffer(), len);
memcpy(bufx, rfm12_rx_buffer(), len);
/*if (aes_key_nr == 0)
{
UART_PUTS("Before decryption: ");
printbytearray(bufx, len);
}*/
eeprom_read_block (aes_key, (uint8_t *)(EEPROM_POS_AES_KEY + aes_key_nr * 32), 32);
//UART_PUTS("Trying AES key ");
//printbytearray((uint8_t *)aes_key, 32);
aes256_decrypt_cbc(bufx, len);
//UART_PUTS("Decrypted bytes: ");
//printbytearray(bufx, len);
assumed_crc = getBuf32(len - 4);
actual_crc = crc32(bufx, len - 4);
//UART_PUTF("Received CRC32 would be %lx\r\n", assumed_crc);
//UART_PUTF("Re-calculated CRC32 is %lx\r\n", actual_crc);
if (assumed_crc == actual_crc)
{
//UART_PUTS("CRC correct, AES key found!\r\n");
UART_PUTF("Received (AES key %u): ", aes_key_nr);
printbytearray(bufx, len - 4);
decode_data(len - 4);
break;
}
}
if (assumed_crc != actual_crc)
{
UART_PUTS("Received garbage (CRC wrong after decryption).\r\n");
}
UART_PUTS("\r\n");
}
//uart_hexdump((char *)bufcontents, rfm12_rx_len());
//UART_PUTS("\r\n");
// tell the implementation that the buffer can be reused for the next data.
rfm12_rx_clear();
}
// send data, if waiting in send buffer
if (send_data_avail)
{
uint8_t i;
uint8_t data_len_raw = strlen(sendbuf) / 2 - 2;
// round data length to 6 + 16 bytes (including padding bytes)
uint8_t data_len = (((data_len_raw + 9) / 16) + 1) * 16 - 10;
// set aes key nr
aes_key_nr = hex_to_uint8((uint8_t *)sendbuf, 0);
//UART_PUTF("AES KEY = %u\r\n", aes_key_nr);
// set command id
uint8_t command_id = hex_to_uint8((uint8_t *)sendbuf, 2);
// set data
for (i = 0; i < data_len_raw; i++)
{
data[i] = hex_to_uint8((uint8_t *)sendbuf, 4 + 2 * i);
}
// set padding bytes
for (i = data_len_raw; i < data_len; i++)
{
data[i] = 0;
}
// send status packet immediately (command IDs are less than 128)
if (command_id < 128)
{
// set command id
bufx[5] = command_id;
// set data
memcpy(bufx + 6, data, data_len);
send_packet(aes_key_nr, data_len);
}
else // enqueue request (don't send immediately)
{
if (queue_request(data[0], command_id, aes_key_nr, data + 1))
{
UART_PUTS("Adding request to queue.\r\n");
}
else
{
UART_PUTS("Warning! Request queue full. Packet will not be sent.\r\n");
}
print_request_queue();
}
// clear send text buffer
send_data_avail = false;
rfm12_tick();
led_blink(200, 0, 1);
}
// flash LED every second to show the device is alive
if (loop == 50)
{
led_blink(10, 10, 1);
loop = 0;
if (set_repeat_request(packetcounter + 1)) // if request to repeat was found in queue
{
UART_PUTS("Repeating request.\r\n");
send_packet(0, 6);
print_request_queue();
}
// Auto-send something for debugging purposes...
if (loop2 == 50)
{
//strcpy(sendbuf, "008c0001003d");
//send_data_avail = true;
loop2 = 0;
}
else
{
loop2++;
}
}
else
{
_delay_ms(20);
}
rfm12_tick();
loop++;
process_rxbuf();
if (uart_timeout > 0)
{
uart_timeout--;
if (uart_timeout == 0)
{
UART_PUTS("*** UART user timeout. Input was ignored. ***\r\n");
}
}
}
// never called
// aes256_done(&aes_ctx);
}
// Show info about the received packets.
// This is only for debugging. The definition of all packets must be known at the PC program
// that's processing the data.
void decode_data(uint8_t len)
{
uint16_t u16;
int16_t s16;
uint32_t u32;
UART_PUTF("Sender ID=%u;", bufx[0]);
UART_PUTF("Packet Counter=%lu;", getBuf32(1));
uint8_t cmd = bufx[5];
UART_PUTF("Command ID=%u;", cmd);
switch (cmd)
{
case 1: // Generic Acknowledge
u32 = getBuf32(7);
UART_PUTS("Command Name=Generic Acknowledge;");
UART_PUTF("Request Sender ID=%u;", bufx[6]);
UART_PUTF("Request Packet Counter=%lu\r\n", u32);
remove_request(bufx[0], bufx[6], u32);
break;
case 10: // Temperature Sensor Status
UART_PUTS("Command Name=Temperature Sensor Status;");
s16 = (int16_t)getBuf16(7);
UART_PUTF("Battery=%u;", bufx[6]);
UART_PUTS("Temperature=");
printSigned(s16);
u16 = getBuf16(9);
UART_PUTF2("Humidity=%u.%02u;", u16 / 100, u16 % 100);
UART_PUTF("Brightness=%u", bufx[11]);
break;
case 20: // Power Switch Status
UART_PUTS("Command Name=Power Switch Status");
print_switch_state(3);
break;
case 21: // Power Switch Status Extended
UART_PUTS("Command Name=Power Switch Status Extended");
print_switch_state(8);
break;
case 30: // DateTime Status
UART_PUTS("Command Name=DateTime Status;");
UART_PUTF3("Date=%u-%02u-%02u;", bufx[6] + 2000, bufx[7], bufx[8]);
UART_PUTF3("Time=%02u:%02u:%02u", bufx[9], bufx[10], bufx[11]);
break;
case 140: // Power Switch Request
UART_PUTS("Command Name=Power Switch Request;");
uint16_t u16 = getBuf16(8);
UART_PUTF("Receiver ID=%u;", bufx[6]);
UART_PUTF("Switch Bitmask=%u;", bufx[7]); // TODO: Set binary mode like 00010110
UART_PUTF("Requested State=%u;", u16 & 0b1);
UART_PUTF("Timeout=%u", u16 >> 1);
break;
case 141: // Dimmer Request
UART_PUTS("Command Name=Dimmer Request;");
UART_PUTF("Receiver ID=%u;", bufx[6]);
UART_PUTF("Animation Mode=%u;", bufx[7] >> 5);
UART_PUTF("Dimmer Bitmask=%u;", bufx[7] & 0b111);
UART_PUTF("Timeout=%u;", getBuf16(8));
UART_PUTF("Start Brightness=%u;", bufx[10]);
UART_PUTF("End Brightness=%u", bufx[11]);
break;
default:
UART_PUTS("Command Name=Unknown;");
UART_PUTS("Data=");
printbytearray(bufx + 6, len - 6);
}
if (cmd != 1)
{
UART_PUTS("\r\n");
}
}
int main(void)
{
uint16_t send_status_timeout = 25;
uint32_t station_packetcounter;
uint32_t pos;
uint8_t button_state = 0;
uint8_t manual_dim_direction = 0;
// delay 1s to avoid further communication with uart or RFM12 when my programmer resets the MC after 500ms...
_delay_ms(1000);
util_init();
check_eeprom_compatibility(DEVICE_TYPE_DIMMER);
osccal_init();
// read packetcounter, increase by cycle and write back
packetcounter = eeprom_read_dword((uint32_t*)EEPROM_POS_PACKET_COUNTER) + PACKET_COUNTER_WRITE_CYCLE;
eeprom_write_dword((uint32_t*)EEPROM_POS_PACKET_COUNTER, packetcounter);
// read device id and write to send buffer
device_id = eeprom_read_byte((uint8_t*)EEPROM_POS_DEVICE_ID);
use_pwm_translation = 1; //eeprom_read_byte((uint8_t*)EEPROM_POS_USE_PWM_TRANSLATION);
// TODO: read (saved) dimmer state from before the eventual powerloss
/*for (i = 0; i < SWITCH_COUNT; i++)
{
uint16_t u16 = eeprom_read_word((uint16_t*)EEPROM_POS_SWITCH_STATE + i * 2);
switch_state[i] = (uint8_t)(u16 & 0b1);
switch_timeout[i] = u16 >> 1;
}*/
// read last received station packetcounter
station_packetcounter = eeprom_read_dword((uint32_t*)EEPROM_POS_STATION_PACKET_COUNTER);
led_blink(200, 200, 5);
#ifdef UART_DEBUG
uart_init(false);
UART_PUTS ("\r\n");
UART_PUTS ("smarthomatic Dimmer V1.0 (c) 2013 Uwe Freese, www.smarthomatic.org\r\n");
osccal_info();
UART_PUTF ("Device ID: %u\r\n", device_id);
UART_PUTF ("Packet counter: %lu\r\n", packetcounter);
UART_PUTF ("Use PWM translation table: %u\r\n", use_pwm_translation);
UART_PUTF ("Last received station packet counter: %u\r\n\r\n", station_packetcounter);
#endif
// init AES key
eeprom_read_block (aes_key, (uint8_t *)EEPROM_POS_AES_KEY, 32);
rfm12_init();
PWM_init();
io_init();
setPWMDutyCycle(0);
timer0_init();
// DEMO to measure the voltages of different PWM settings to calculate the pwm_lookup table
/*while (42)
{
uint16_t i;
for (i = 0; i <= 1024; i = i + 100)
{
UART_PUTF ("PWM value OCR1A: %u\r\n", i);
OCR1A = i;
led_blink(500, 6500, 1);
}
}*/
// DEMO 0..100..0%, using the pwm_lookup table and the translation table in EEPROM.
/*while (42)
{
float i;
for (i = 0; i <= 100; i = i + 0.05)
{
led_blink(10, 10, 1);
setPWMDutyCycle(i);
}
for (i = 99.95; i > 0; i = i - 0.05)
{
led_blink(10, 10, 1);
setPWMDutyCycle(i);
}
}*/
// set initial switch state
/*for (i = 0; i < SWITCH_COUNT; i++)
{
switchRelais(i, switch_state[i]);
}*/
sei();
// DEMO 30s
/*animation_length = 30;
animation_length = (uint32_t)((float)animation_length * 1000 / ANIMATION_CYCLE_MS);
start_brightness = 0;
end_brightness = 255;
animation_position = 0;*/
while (42)
{
if (rfm12_rx_status() == STATUS_COMPLETE)
{
uint8_t len = rfm12_rx_len();
if ((len == 0) || (len % 16 != 0))
{
UART_PUTF("Received garbage (%u bytes not multiple of 16): ", len);
printbytearray(bufx, len);
}
else // try to decrypt with all keys stored in EEPROM
{
memcpy(bufx, rfm12_rx_buffer(), len);
//UART_PUTS("Before decryption: ");
//printbytearray(bufx, len);
aes256_decrypt_cbc(bufx, len);
//UART_PUTS("Decrypted bytes: ");
//printbytearray(bufx, len);
uint32_t assumed_crc = getBuf32(len - 4);
uint32_t actual_crc = crc32(bufx, len - 4);
//UART_PUTF("Received CRC32 would be %lx\r\n", assumed_crc);
//UART_PUTF("Re-calculated CRC32 is %lx\r\n", actual_crc);
if (assumed_crc != actual_crc)
{
UART_PUTS("Received garbage (CRC wrong after decryption).\r\n");
}
else
{
//UART_PUTS("CRC correct, AES key found!\r\n");
UART_PUTS(" Received: ");
printbytearray(bufx, len - 4);
// decode command and react
uint8_t sender = bufx[0];
UART_PUTF(" Sender: %u\r\n", sender);
if (sender != 0)
{
UART_PUTF("Packet not from base station. Ignoring (Sender ID was: %u).\r\n", sender);
}
else
{
uint32_t packcnt = getBuf32(1);
UART_PUTF(" Packet Counter: %lu\r\n", packcnt);
// check received counter
if (0) //packcnt <= station_packetcounter)
{
UART_PUTF2("Received packet counter %lu is lower than last received counter %lu. Ignoring packet.\r\n", packcnt, station_packetcounter);
}
else
{
// write received counter
station_packetcounter = packcnt;
eeprom_write_dword((uint32_t*)EEPROM_POS_STATION_PACKET_COUNTER, station_packetcounter);
// check command ID
uint8_t cmd = bufx[5];
UART_PUTF(" Command ID: %u\r\n", cmd);
if (cmd != 141) // ID 141 == Dimmer Request
{
UART_PUTF("Received unknown command ID %u. Ignoring packet.\r\n", cmd);
}
else
{
// check device id
uint8_t rcv_id = bufx[6];
UART_PUTF(" Receiver ID: %u\r\n", rcv_id);
if (rcv_id != device_id)
{
UART_PUTF("Device ID %u does not match. Ignoring packet.\r\n", rcv_id);
}
else
{
// read animation mode and parameters
uint8_t animation_mode = bufx[7] >> 5;
// TODO: Implement support for multiple dimmers (e.g. RGB)
// uint8_t dimmer_bitmask = bufx[7] & 0b111;
animation_length = getBuf16(8);
start_brightness = bufx[10];
end_brightness = bufx[11];
UART_PUTF(" Animation Mode: %u\r\n", animation_mode); // TODO: Set binary mode like 00010110
//UART_PUTF(" Dimmer Bitmask: %u\r\n", dimmer_bitmask);
UART_PUTF(" Animation Time: %us\r\n", animation_length);
UART_PUTF(" Start Brightness: %u\r\n", start_brightness);
UART_PUTF(" End Brightness: %u\r\n", end_brightness);
animation_length = (uint32_t)((float)animation_length * 1000 / ANIMATION_CYCLE_MS);
animation_position = 0;
/* TODO: Write to EEPROM (?)
// write back switch state to EEPROM
switch_state[i] = req_state;
switch_timeout[i] = req_timeout;
eeprom_write_word((uint16_t*)EEPROM_POS_SWITCH_STATE + i * 2, u16);
*/
// send acknowledge
UART_PUTS("Sending ACK:\r\n");
// set device ID (base station has ID 0 by definition)
bufx[0] = device_id;
// update packet counter
packetcounter++;
if (packetcounter % PACKET_COUNTER_WRITE_CYCLE == 0)
{
eeprom_write_dword((uint32_t*)0, packetcounter);
}
setBuf32(1, packetcounter);
// set command ID "Generic Acknowledge"
bufx[5] = 1;
// set sender ID of request
bufx[6] = sender;
// set Packet counter of request
setBuf32(7, station_packetcounter);
// zero unused bytes
bufx[11] = 0;
// set CRC32
uint32_t crc = crc32(bufx, 12);
setBuf32(12, crc);
// show info
UART_PUTF(" CRC32: %lx\r\n", crc);
uart_putstr(" Unencrypted: ");
printbytearray(bufx, 16);
rfm12_sendbuf();
UART_PUTS(" Send encrypted: ");
printbytearray(bufx, 16);
UART_PUTS("\r\n");
rfm12_tick();
led_blink(200, 0, 1);
send_status_timeout = 25;
}
}
}
}
}
}
// tell the implementation that the buffer can be reused for the next data.
rfm12_rx_clear();
}
_delay_ms(ANIMATION_UPDATE_MS);
// React on button press.
// - abort animation
// - switch off, when brightness > 0
// - switch on otherwise
if (!(BUTTON_PORT & (1 << BUTTON_PIN))) // button press
{
if (button_state == 0)
{
UART_PUTS("Button pressed\r\n");
animation_length = 0;
animation_position = 0;
}
if (button_state < 5)
{
button_state++;
}
else // manual dimming
{
if (manual_dim_direction) // UP
{
if (current_brightness < 100)
{
current_brightness = (uint8_t)current_brightness / 2 * 2 + 2;
setPWMDutyCycle(current_brightness);
}
else
{
UART_PUTS("manual dimming DOWN\r\n");
manual_dim_direction = 0;
}
}
else // DOWN
{
if (current_brightness > 0)
{
current_brightness = (((uint8_t)current_brightness - 1) / 2) * 2;
setPWMDutyCycle(current_brightness);
}
else
{
UART_PUTS("manual dimming UP\r\n");
manual_dim_direction = 1;
}
}
}
}
else if (button_state && (BUTTON_PORT & (1 << BUTTON_PIN))) // button release
{
UART_PUTS("Button released\r\n");
if (button_state < 5) // short button press
{
if (current_brightness > 0)
{
UART_PUTS(" -> 0%\r\n");
setPWMDutyCycle(0);
}
else
{
UART_PUTS(" -> 100%\r\n");
setPWMDutyCycle(100);
}
}
else
{
// reverse dim direction
manual_dim_direction = !manual_dim_direction;
}
button_state = 0;
}
// update brightness according animation_position, updated by timer0
if (animation_length > 0)
{
pos = animation_position; // copy value to avoid that it changes in between by timer interrupt
UART_PUTF2("%lu/%lu, ", pos, animation_length);
if (pos == animation_length)
{
UART_PUTF("END Brightness %u%%, ", end_brightness * 100 / 255);
setPWMDutyCycle((float)end_brightness * 100 / 255);
animation_length = 0;
animation_position = 0;
}
else
{
float brightness = (start_brightness + ((float)end_brightness - start_brightness) * pos / animation_length) * 100 / 255;
UART_PUTF("Br.%u%%, ", (uint32_t)(brightness));
setPWMDutyCycle(brightness);
}
}
// send status from time to time
if (send_status_timeout == 0)
{
send_status_timeout = SEND_STATUS_EVERY_SEC * (1000 / ANIMATION_UPDATE_MS);
send_dimmer_status();
led_blink(200, 0, 1);
}
rfm12_tick();
send_status_timeout--;
checkSwitchOff();
}
