Tasmota/lib/esp-knx-ip-0.5.0/esp-knx-ip-send.cpp

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/**
* esp-knx-ip library for KNX/IP communication on an ESP8266
* Author: Nico Weichbrodt <envy>
* License: MIT
*/
#include "esp-knx-ip.h"
/**
* Send functions
*/
void ESPKNXIP::send(address_t const &receiver, knx_command_type_t ct, uint8_t data_len, uint8_t *data)
{
if (receiver.value == 0)
return;
#if SEND_CHECKSUM
uint32_t len = 6 + 2 + 8 + data_len + 1; // knx_pkt + cemi_msg + cemi_service + data + checksum
#else
uint32_t len = 6 + 2 + 8 + data_len; // knx_pkt + cemi_msg + cemi_service + data
#endif
DEBUG_PRINT(F("Creating packet with len "));
DEBUG_PRINTLN(len)
uint8_t buf[len];
knx_ip_pkt_t *knx_pkt = (knx_ip_pkt_t *)buf;
knx_pkt->header_len = 0x06;
knx_pkt->protocol_version = 0x10;
knx_pkt->service_type = __ntohs(KNX_ST_ROUTING_INDICATION);
knx_pkt->total_len.len = __ntohs(len);
cemi_msg_t *cemi_msg = (cemi_msg_t *)knx_pkt->pkt_data;
cemi_msg->message_code = KNX_MT_L_DATA_IND;
cemi_msg->additional_info_len = 0;
cemi_service_t *cemi_data = &cemi_msg->data.service_information;
cemi_data->control_1.bits.confirm = 0;
cemi_data->control_1.bits.ack = 0;
cemi_data->control_1.bits.priority = B11;
cemi_data->control_1.bits.system_broadcast = 0x01;
cemi_data->control_1.bits.repeat = 0x01;
cemi_data->control_1.bits.reserved = 0;
cemi_data->control_1.bits.frame_type = 0x01;
cemi_data->control_2.bits.extended_frame_format = 0x00;
cemi_data->control_2.bits.hop_count = 0x06;
cemi_data->control_2.bits.dest_addr_type = 0x01;
cemi_data->source = physaddr;
cemi_data->destination = receiver;
//cemi_data->destination.bytes.high = (area << 3) | line;
//cemi_data->destination.bytes.low = member;
cemi_data->data_len = data_len;
cemi_data->pci.apci = (ct & 0x0C) >> 2;
cemi_data->pci.tpci_seq_number = 0x00; // ???
cemi_data->pci.tpci_comm_type = KNX_COT_UDP; // ???
memcpy(cemi_data->data, data, data_len);
cemi_data->data[0] = (cemi_data->data[0] & 0x3F) | ((ct & 0x03) << 6);
#if SEND_CHECKSUM
// Calculate checksum, which is just XOR of all bytes
uint8_t cs = buf[0] ^ buf[1];
for (uint32_t i = 2; i < len - 1; ++i)
{
cs ^= buf[i];
}
buf[len - 1] = cs;
#endif
#ifdef ESP_KNX_DEBUG
DEBUG_PRINT(F("Sending packet:"));
for (int i = 0; i < len; ++i)
{
DEBUG_PRINT(F(" 0x"));
DEBUG_PRINT(buf[i], 16);
}
DEBUG_PRINTLN(F(""));
#endif
udp.beginPacketMulticast(MULTICAST_IP, MULTICAST_PORT, WiFi.localIP());
udp.write(buf, len);
udp.endPacket();
}
void ESPKNXIP::send_1bit(address_t const &receiver, knx_command_type_t ct, uint8_t bit)
{
uint8_t buf[] = {(uint8_t)(bit & 0b00000001)};
send(receiver, ct, 1, buf);
}
void ESPKNXIP::send_2bit(address_t const &receiver, knx_command_type_t ct, uint8_t twobit)
{
uint8_t buf[] = {(uint8_t)(twobit & 0b00000011)};
send(receiver, ct, 1, buf);
}
void ESPKNXIP::send_4bit(address_t const &receiver, knx_command_type_t ct, uint8_t fourbit)
{
uint8_t buf[] = {(uint8_t)(fourbit & 0b00001111)};
send(receiver, ct, 1, buf);
}
void ESPKNXIP::send_1byte_int(address_t const &receiver, knx_command_type_t ct, int8_t val)
{
uint8_t buf[] = {0x00, (uint8_t)val};
send(receiver, ct, 2, buf);
}
void ESPKNXIP::send_1byte_uint(address_t const &receiver, knx_command_type_t ct, uint8_t val)
{
uint8_t buf[] = {0x00, val};
send(receiver, ct, 2, buf);
}
void ESPKNXIP::send_2byte_int(address_t const &receiver, knx_command_type_t ct, int16_t val)
{
uint8_t buf[] = {0x00, (uint8_t)(val >> 8), (uint8_t)(val & 0x00FF)};
send(receiver, ct, 3, buf);
}
void ESPKNXIP::send_2byte_uint(address_t const &receiver, knx_command_type_t ct, uint16_t val)
{
uint8_t buf[] = {0x00, (uint8_t)(val >> 8), (uint8_t)(val & 0x00FF)};
send(receiver, ct, 3, buf);
}
void ESPKNXIP::send_2byte_float(address_t const &receiver, knx_command_type_t ct, float val)
{
float v = val * 100.0f;
int e = 0;
for (; v < -2048.0f; v /= 2)
++e;
for (; v > 2047.0f; v /= 2)
++e;
long m = round(v) & 0x7FF;
short msb = (short) (e << 3 | m >> 8);
if (val < 0.0f)
msb |= 0x80;
uint8_t buf[] = {0x00, (uint8_t)msb, (uint8_t)m};
send(receiver, ct, 3, buf);
}
void ESPKNXIP::send_3byte_time(address_t const &receiver, knx_command_type_t ct, uint8_t weekday, uint8_t hours, uint8_t minutes, uint8_t seconds)
{
weekday <<= 5;
uint8_t buf[] = {0x00, (uint8_t)(((weekday << 5) & 0xE0) | (hours & 0x1F)), (uint8_t)(minutes & 0x3F), (uint8_t)(seconds & 0x3F)};
send(receiver, ct, 4, buf);
}
void ESPKNXIP::send_3byte_date(address_t const &receiver, knx_command_type_t ct, uint8_t day, uint8_t month, uint8_t year)
{
uint8_t buf[] = {0x00, (uint8_t)(day & 0x1F), (uint8_t)(month & 0x0F), year};
send(receiver, ct, 4, buf);
}
void ESPKNXIP::send_3byte_color(address_t const &receiver, knx_command_type_t ct, uint8_t red, uint8_t green, uint8_t blue)
{
uint8_t buf[] = {0x00, red, green, blue};
send(receiver, ct, 4, buf);
}
void ESPKNXIP::send_4byte_int(address_t const &receiver, knx_command_type_t ct, int32_t val)
{
uint8_t buf[] = {0x00,
(uint8_t)((val & 0xFF000000) >> 24),
(uint8_t)((val & 0x00FF0000) >> 16),
(uint8_t)((val & 0x0000FF00) >> 8),
(uint8_t)((val & 0x000000FF) >> 0)};
send(receiver, ct, 5, buf);
}
void ESPKNXIP::send_4byte_uint(address_t const &receiver, knx_command_type_t ct, uint32_t val)
{
uint8_t buf[] = {0x00,
(uint8_t)((val & 0xFF000000) >> 24),
(uint8_t)((val & 0x00FF0000) >> 16),
(uint8_t)((val & 0x0000FF00) >> 8),
(uint8_t)((val & 0x000000FF) >> 0)};
send(receiver, ct, 5, buf);
}
void ESPKNXIP::send_4byte_float(address_t const &receiver, knx_command_type_t ct, float val)
{
uint8_t buf[] = {0x00, ((uint8_t *)&val)[3], ((uint8_t *)&val)[2], ((uint8_t *)&val)[1], ((uint8_t *)&val)[0]};
send(receiver, ct, 5, buf);
}