// 检查是否收到一个帧，在main里循环调用。
void inpertreter_checkFrame(void)
{
uint8_t i;
uint8_t rfBuf[INTERPRETER_ST_MAX_LEN];
const uint8_t validLen = interpreter_getBufferValidDataLen();
//
if(interpreter_status == INTERPRETER_ST_FINDING_55)
{
// 先要判断是否有足够的数据。
if(validLen < 1)
return;
if(interpreter_getAByte() == (uint8_t)0x55)
interpreter_status = INTERPRETER_ST_NEED_AA;
}
else if(interpreter_status == INTERPRETER_ST_NEED_AA)
{
if(validLen < 2)
return;
if(interpreter_getAByte() == (uint8_t)0xAA)
{
// 获取帧长度。
interpreter_status = interpreter_getAByte();
//
// 判断长度有效性。
if(interpreter_status > INTERPRETER_ST_MAX_LEN)
interpreter_status = INTERPRETER_ST_FINDING_55;
}
else
// 如果状态是NEED_AA，而实际不是，就重新FINDING_55。
interpreter_status = INTERPRETER_ST_FINDING_55;
}
else if(interpreter_status <= INTERPRETER_ST_MAX_LEN)
{
if(validLen < interpreter_status)
return;
for(i=0;i<interpreter_status;i++)
rfBuf[i] = interpreter_getAByte();
rf_transmit(rfBuf,interpreter_status);
interpreter_status = INTERPRETER_ST_FINDING_55;
}
else
interpreter_status = INTERPRETER_ST_FINDING_55;
}
void rf_broadcast(uint8_t type, uint8_t data)
{
uint8_t buffer[2] = {type, data};
rf_packet_t packet = {
.dest_addr = 0xFFFF,
.length = 2,
.data = buffer
};
rf_transmit(&packet);
}
void rf_broadcast_16(uint8_t type, uint16_t data)
{
uint8_t buffer[3] = {type, 0, 0};
*((uint16_t*)(&buffer[1])) = data;
rf_packet_t packet = {
.dest_addr = 0xFFFF,
.length = 3,
.data = buffer
};
rf_transmit(&packet);
}
void rf_tx(uint16_t addr, uint8_t type, uint8_t data)
{
uint8_t buffer[2] = {type, data};
rf_packet_t packet = {
.dest_addr = addr,
.length = 2,
.data = buffer
};
rf_transmit(&packet);
}
void rf_tx_16(uint16_t addr, uint8_t type, uint16_t data)
{
uint8_t buffer[3] = {type, 0, 0};
*((uint16_t*)(&buffer[1])) = data;
rf_packet_t packet = {
.dest_addr = addr,
.length = 3,
.data = buffer
};
rf_transmit(&packet);
}
void rf_transmit(rf_packet_t *packet)
{
uint8_t status;
do {
status = TRX_STATUS_struct.trx_status;
}
while((status == BUSY_TX) ||
(status == BUSY_TX_ARET) ||
(status == BUSY_RX) ||
(status == BUSY_RX_AACK));
TRX_STATE_struct.trx_cmd = CMD_PLL_ON;
while(TRX_STATUS_struct.trx_status != PLL_ON) ;
// print("In PLL_ON state.\n");
uint8_t length = packet->length + 13; // 2 byte FCF, 1 byte seq no, 4 bytes destination address, 4 bytes source address, ... data ..., 2 byte CRC
uint8_t *buffer = (uint8_t*)&TRXFBST;
buffer[0] = length;
// Reserved(1), Intra PAN(1), ACK req(1), Frame pend(1), Security(1), Frame type(3)
// Frame types:: 000: Beacon 001: Data 010: Ack 011: MAC command
if (packet->req_ack)
buffer[1] = 0b00100001; // FCF
else
buffer[1] = 0b00000001; // FCF
// Src adr mode(2), Frame ver.(2), Dest adr mode(2), Reserved(2)
// Adr modes: 00: None 01: Reserved 10: 16-bit 11: 64-bit
buffer[2] = 0b10001000; // FCF
buffer[3] = rf.seq_no++; // seq no
buffer[4] = rf.pan_id&0xFF;
buffer[5] = rf.pan_id>>8;
buffer[6] = packet->dest_addr&0xFF;
buffer[7] = packet->dest_addr>>8;
buffer[8] = rf.pan_id&0xFF;
buffer[9] = rf.pan_id>>8;
buffer[10] = rf.addr&0xFF; // Use address in packet?
buffer[11] = rf.addr>>8;
memcpy(buffer+12, packet->data, packet->length);
dbg_print("Transmitting packet");
TRX_STATE_struct.trx_cmd = CMD_TX_ARET_ON;
while (TRX_STATUS_struct.trx_status != TX_ARET_ON);
TRX_STATE_struct.trx_cmd = CMD_TX_START;
//while(TRX_STATUS_struct.trx_status != BUSY_TX);
}
