| | |
| | | }; |
| | | |
| | | /* Frames used in the ranging process. See NOTE 2 below. */ |
| | | static uint8 tx_poll_msg[] = {0x00, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x21, 0, 0}; |
| | | //static uint8 rx_resp_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'V', 'E', 'W', 'A', 0x10, 0x02, 0, 0, 0, 0}; |
| | | static uint8 tx_final_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| | | static uint8_t tx_poll_msg[] = {0x00, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x21, 0, 0}; |
| | | //static uint8_t rx_resp_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'V', 'E', 'W', 'A', 0x10, 0x02, 0, 0, 0, 0}; |
| | | static uint8_t tx_final_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| | | |
| | | //static uint8 rx_poll_msg[] = {0x00, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x21, 0, 0}; |
| | | static uint8 tx_resp_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'V', 'E', 'W', 'A', 0x10, 0x02, 0, 0, 0, 0}; |
| | | //static uint8 rx_final_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| | | //static uint8_t rx_poll_msg[] = {0x00, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x21, 0, 0}; |
| | | static uint8_t tx_resp_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'V', 'E', 'W', 'A', 0x10, 0x02, 0, 0, 0, 0}; |
| | | //static uint8_t rx_final_msg[] = {0x41, 0x88, 0, 0xCA, 0xDE, 'W', 'A', 'V', 'E', 0x23, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| | | |
| | | /* Frame sequence number, incremented after each transmission. */ |
| | | static uint32 frame_seq_nb = 0; |
| | | static uint32_t frame_seq_nb = 0; |
| | | |
| | | /* Hold copy of status register state here for reference, so reader can examine it at a breakpoint. */ |
| | | static uint32 status_reg = 0; |
| | | static uint32_t status_reg = 0; |
| | | |
| | | /* Buffer to store received response message. |
| | | * Its size is adjusted to longest frame that this example code is supposed to handle. */ |
| | | #define RX_BUF_LEN 24 |
| | | static uint8 rx_buffer[RX_BUF_LEN]; |
| | | static uint8_t rx_buffer[RX_BUF_LEN]; |
| | | |
| | | /* Time-stamps of frames transmission/reception, expressed in device time units. |
| | | * As they are 40-bit wide, we need to define a 64-bit int type to handle them. */ |
| | | typedef unsigned long long uint64; |
| | | static uint64 poll_tx_ts; |
| | | static uint64 resp_rx_ts; |
| | | static uint64 final_tx_ts; |
| | | static uint64_t poll_tx_ts; |
| | | static uint64_t resp_rx_ts; |
| | | static uint64_t final_tx_ts; |
| | | |
| | | /* Length of the common part of the message (up to and including the function code, see NOTE 2 below). */ |
| | | typedef signed long long int64; |
| | | static uint64 poll_rx_ts; |
| | | static uint64 resp_tx_ts; |
| | | static uint64 final_rx_ts; |
| | | static uint64_t poll_rx_ts; |
| | | static uint64_t resp_tx_ts; |
| | | static uint64_t final_rx_ts; |
| | | |
| | | static double tof; |
| | | |
| | |
| | | * |
| | | * @return 64-bit value of the read time-stamp. |
| | | */ |
| | | static uint64 get_tx_timestamp_u64(void) |
| | | static uint64_t get_tx_timestamp_u64(void) |
| | | { |
| | | uint8 ts_tab[5]; |
| | | uint64 ts = 0; |
| | | uint8_t ts_tab[5]; |
| | | uint64_t ts = 0; |
| | | int i; |
| | | dwt_readtxtimestamp(ts_tab); |
| | | for (i = 4; i >= 0; i--) |
| | |
| | | * |
| | | * @return 64-bit value of the read time-stamp. |
| | | */ |
| | | static uint64 get_rx_timestamp_u64(void) |
| | | static uint64_t get_rx_timestamp_u64(void) |
| | | { |
| | | uint8 ts_tab[5]; |
| | | uint64 ts = 0; |
| | | uint8_t ts_tab[5]; |
| | | uint64_t ts = 0; |
| | | int i; |
| | | dwt_readrxtimestamp(ts_tab); |
| | | for (i = 4; i >= 0; i--) |
| | |
| | | * |
| | | * @return none |
| | | */ |
| | | static void final_msg_set_ts(uint8 *ts_field, uint64 ts) |
| | | static void final_msg_set_ts(uint8_t *ts_field, uint64_t ts) |
| | | { |
| | | int i; |
| | | for (i = 0; i < FINAL_MSG_TS_LEN; i++) |
| | | { |
| | | ts_field[i] = (uint8) ts; |
| | | ts_field[i] = (uint8_t) ts; |
| | | ts >>= 8; |
| | | } |
| | | } |
| | | |
| | | static void final_msg_get_ts(const uint8 *ts_field, uint32 *ts) |
| | | static void final_msg_get_ts(const uint8_t *ts_field, uint32_t *ts) |
| | | { |
| | | int i; |
| | | *ts = 0; |
| | |
| | | |
| | | void Tag_App(void)//å鿍¡å¼(TAGæ ç¾) |
| | | { |
| | | uint32 frame_len; |
| | | uint32 final_tx_time; |
| | | uint32_t frame_len; |
| | | uint32_t final_tx_time; |
| | | |
| | | /* Write frame data to DW1000 and prepare transmission. See NOTE 7 below. */ |
| | | tx_poll_msg[ALL_MSG_SN_IDX] = frame_seq_nb; |
| | |
| | | dwt_setdelayedtrxtime(final_tx_time);//设置finalå
åéæ¶é´T5 |
| | | |
| | | /* Final TX timestamp is the transmission time we programmed plus the TX antenna delay. */ |
| | | final_tx_ts = (((uint64)(final_tx_time & 0xFFFFFFFE)) << 8) + TX_ANT_DLY;//finalå
å®é
åéæ¶é´æ¯è®¡ç®æ¶é´å ä¸åé天线delay |
| | | final_tx_ts = (((uint64_t)(final_tx_time & 0xFFFFFFFE)) << 8) + TX_ANT_DLY;//finalå
å®é
åéæ¶é´æ¯è®¡ç®æ¶é´å ä¸åé天线delay |
| | | |
| | | /* Write all timestamps in the final message. See NOTE 10 below. */ |
| | | final_msg_set_ts(&tx_final_msg[FINAL_MSG_POLL_TX_TS_IDX], poll_tx_ts);//å°T1ï¼T4ï¼T5åå
¥åéæ°æ® |
| | |
| | | dwt_writetxdata(sizeof(tx_final_msg), tx_final_msg, 0);//å°åéæ°æ®åå
¥DW1000 |
| | | dwt_writetxfctrl(sizeof(tx_final_msg), 0);//设å®åéæ°æ®é¿åº¦ |
| | | dwt_starttx(DWT_START_TX_DELAYED);//设å®ä¸ºå»¶è¿åé |
| | | |
| | | //è¿é为串å£è¾åº |
| | | // if (GPIO_ReadInputDataBit(GPIOA, SW2) != RESET) //éè¿æ¨ç å¼å
³å¤ææ°æ®è¾åºæ ¼å¼ |
| | | // { |
| | | // dID = TAG_ID; |
| | | // printf("TAG_ID: %2.0f ", dID); |
| | | // dID = ANCHOR_ID; |
| | | // printf("ANCHOR_ID: %2.0f ", dID); |
| | | // printf("Distance: %5.0f cm\n", (double)dist[TAG_ID]); |
| | | // } |
| | | // else |
| | | // { |
| | | // send[2] = ANCHOR_ID; |
| | | // send[3] = TAG_ID; |
| | | |
| | | // memcpy(&send[4], &dist[TAG_ID], 2); |
| | | // check = Checksum_u16(&send[2], 6); |
| | | // memcpy(&send[8], &check, 2); |
| | | // USART_puts(send, 10); |
| | | // } |
| | | |
| | | /* Poll DW1000 until TX frame sent event set. See NOTE 8 below. */ |
| | | while (!(dwt_read32bitreg(SYS_STATUS_ID) & SYS_STATUS_TXFRS))//䏿æ¥è¯¢è¯çç¶æç´å°åé宿 |
| | |
| | | |
| | | void Anchor_App(void) |
| | | { |
| | | uint32 frame_len; |
| | | uint32 resp_tx_time; |
| | | uint32_t frame_len; |
| | | uint32_t resp_tx_time; |
| | | |
| | | /* Clear reception timeout to start next ranging process. */ |
| | | dwt_setrxtimeout(0);//è®¾å®æ¥æ¶è¶
æ¶æ¶é´ï¼0使²¡æè¶
æ¶æ¶é´ |
| | |
| | | rx_buffer[ALL_MSG_SN_IDX] = 0; |
| | | if (rx_buffer[9] == 0x23) //夿æ¯å¦ä¸ºFinalå
|
| | | { |
| | | uint32 poll_tx_ts, resp_rx_ts, final_tx_ts; |
| | | uint32 poll_rx_ts_32, resp_tx_ts_32, final_rx_ts_32; |
| | | uint32_t poll_tx_ts, resp_rx_ts, final_tx_ts; |
| | | uint32_t poll_rx_ts_32, resp_tx_ts_32, final_rx_ts_32; |
| | | double Ra, Rb, Da, Db; |
| | | int64_t tof_dtu; |
| | | |
| | |
| | | final_msg_get_ts(&rx_buffer[FINAL_MSG_FINAL_TX_TS_IDX], &final_tx_ts); |
| | | |
| | | /* Compute time of flight. 32-bit subtractions give correct answers even if clock has wrapped. See NOTE 10 below. */ |
| | | poll_rx_ts_32 = (uint32)poll_rx_ts;//使ç¨32使°æ®è®¡ç® |
| | | resp_tx_ts_32 = (uint32)resp_tx_ts; |
| | | final_rx_ts_32 = (uint32)final_rx_ts; |
| | | poll_rx_ts_32 = (uint32_t)poll_rx_ts;//使ç¨32使°æ®è®¡ç® |
| | | resp_tx_ts_32 = (uint32_t)resp_tx_ts; |
| | | final_rx_ts_32 = (uint32_t)final_rx_ts; |
| | | Ra = (double)(resp_rx_ts - poll_tx_ts);//Tround1 = T4 - T1 |
| | | Rb = (double)(final_rx_ts_32 - resp_tx_ts_32);//Tround2 = T6 - T3 |
| | | Da = (double)(final_tx_ts - resp_rx_ts);//Treply2 = T5 - T4 |
| | | Db = (double)(resp_tx_ts_32 - poll_rx_ts_32);//Treply1 = T3 - T2 |
| | | tof_dtu = (int64)((Ra * Rb - Da * Db) / (Ra + Rb + Da + Db));//计ç®å
¬å¼ |
| | | tof_dtu = (int64_t)((Ra * Rb - Da * Db) / (Ra + Rb + Da + Db));//计ç®å
¬å¼ |
| | | |
| | | tof = tof_dtu * DWT_TIME_UNITS; |
| | | distance = tof * SPEED_OF_LIGHT;//è·ç¦»=å
é*é£è¡æ¶é´ |
| | |
| | | // dist[TAG_ID] = LP(dis, TAG_ID); //LP 为ä½é滤波å¨ï¼è®©æ°æ®æ´ç¨³å® |
| | | |
| | | LED0_BLINK; //æ¯æå䏿¬¡é讯åéªç䏿¬¡ |
| | | //è¿éä¾ä¸²å£è¾åº |
| | | // if (GPIO_ReadInputDataBit(GPIOA, SW2) != RESET) //éè¿æ¨ç å¼å
³å¤ææ°æ®è¾åºæ ¼å¼ |
| | | // { |
| | | // dID = TAG_ID; |
| | | // printf("TAG_ID: %2.0f ", dID); |
| | | // dID = ANCHOR_ID; |
| | | // printf("ANCHOR_ID: %2.0f ", dID); |
| | | // printf("Distance: %5.0f cm\n", (double)dist[TAG_ID]); |
| | | // } |
| | | // else |
| | | // { |
| | | // send[2] = ANCHOR_ID; |
| | | // send[3] = TAG_ID; |
| | | |
| | | // memcpy(&send[4], &dist[TAG_ID], 2); |
| | | // check = Checksum_u16(&send[2], 6); |
| | | // memcpy(&send[8], &check, 2); |
| | | // USART_puts(send, 10); |
| | | // } |
| | | |
| | | } |
| | | } |