void gzp_pairing_enable(bool enable) { gzll_states_t temp_gzll_state; temp_gzll_state = gzll_get_state(); if(gzp_pairing_enabled_f != enable) { gzll_goto_idle(); if(enable) { gzll_set_param(GZLL_PARAM_RX_PIPES, gzll_get_param(GZLL_PARAM_RX_PIPES) | (1 << GZP_PAIRING_PIPE)); } else { gzll_set_param(GZLL_PARAM_RX_PIPES, gzll_get_param(GZLL_PARAM_RX_PIPES) & ~(1 << GZP_PAIRING_PIPE)); gzp_id_req_stat = GZP_ID_REQ_IDLE; } gzp_pairing_enabled_f = enable; if(temp_gzll_state == GZLL_HOST_ACTIVE) { gzll_rx_start(); } } }
void mm_gzll_params(char * lcd_l0, char * lcd_l1, uint8_t buttons) { static xdata uint8_t gzll_param_page = 0; if(buttons & SUB_MENU_INC) { gzll_param_page = inc_mod(gzll_param_page, GZLL_DYN_PARAM_SIZE - 1); } if(buttons & SUB_MENU_DEC) { gzll_param_page = dec_mod(gzll_param_page, GZLL_DYN_PARAM_SIZE - 1); } if((buttons & VALUE_INC)) { gzll_set_param(gzll_param_page, inc_mod(gzll_get_param(gzll_param_page), gzll_get_param_max(gzll_param_page))); } if((buttons & VALUE_DEC)) { gzll_set_param(gzll_param_page, dec_mod(gzll_get_param(gzll_param_page), gzll_get_param_max(gzll_param_page))); } strcpy(lcd_l0, gzll_param_menu_header[gzll_param_page]); if(gzll_param_page == GZLL_PARAM_OUTPUT_POWER) { strcpy(lcd_l1, gzll_output_power[gzll_get_param(gzll_param_page)]); } else { sprintf(lcd_l1, "%u", gzll_get_param(gzll_param_page)); } }
void gzp_init() { uint8_t system_address[GZP_SYSTEM_ADDRESS_WIDTH]; // Read "chip id", of which 4 bytes (GZP_SYSTEM_ADDRESS_WIDTH) // are used as system address gzp_host_chip_id_read(system_address, GZP_SYSTEM_ADDRESS_WIDTH); // Set up radio parameters (addresses and channel subset) from system_address gzp_update_radio_params(system_address); // Only "data pipe" enabled by default gzll_set_param(GZLL_PARAM_RX_PIPES, gzll_get_param(GZLL_PARAM_RX_PIPES) | (1 << GZP_DATA_PIPE)); gzp_pairing_enabled_f = false; gzp_address_exchanged_f = false; gzp_id_req_stat = GZP_ID_REQ_IDLE; gzp_encrypted_user_data_length = 0; // Infinite RX timeout gzll_set_param(GZLL_PARAM_RX_TIMEOUT, 0); }
void main(void) { uint8_t payload[GZLL_MAX_PAYLOAD_LENGTH]; mcu_init(); gzll_init(); gzp_init(); gzp_pairing_enable(true); // Open pipe 2. (Pipe 0 and 1 are reserved by pairing library). gzll_set_param(GZLL_PARAM_RX_PIPES, gzll_get_param(GZLL_PARAM_RX_PIPES) | (1 << 2)); // Set P0 as output P0DIR = 0; EA = 1; // Enter host mode (start monitoring for data) gzll_rx_start(); for(;;) { // If gzpair_host_execute() returns true, a pairing request has been received gzp_host_execute(); // If Host ID request received if(gzp_id_req_received()) { // Always grant request gzp_id_req_grant(); } // If any data received (plaintext on pipe 2 or encrypted through Gazell pairing library) if((gzll_get_rx_data_ready_pipe_number() == 2) || (gzp_crypt_user_data_received())) { // Plaintext data received? if(gzll_rx_fifo_read(payload, NULL, NULL)) { // Write received payload[0] to port 0 P0 = payload[0]; } else { // Read data from Gazell pairing library gzp_crypt_user_data_read(payload, NULL); // Write received payload[0] to port 0 P0 = payload[0]; } } } }
void main(void) { uint8_t poll_cnt = 0; uint8_t payload[GZLL_MAX_PAYLOAD_LENGTH]; mcu_init(); gzll_init(); // Always run on 16MHz crystal oscillator hal_clk_set_16m_source(HAL_CLK_XOSC16M); // Use Gazell Link Layer synchronous device mode 2 for minimizing // transmit attempts gzll_set_param(GZLL_PARAM_DEVICE_MODE, 2); EA = 1; while(true) { // If gazell link layer idle if(gzll_get_state() == GZLL_IDLE) { // Send a packet for every 20 wakeup, equals every ~20 ms if(poll_cnt > 20) { // Read P0 and put in payload[0] payload[0] = ~P0; // Transmits 1 byte ( payload[0] ) to pipe 0 address gzll_tx_data(&payload[0], 1, 0); poll_cnt = 0; } } EA = 0; // If radio not active, enter "register retention" if(!gzll_radio_active()) { PWRDWN = 0x04; // Enter "register retention", will wake up on pre-tick } PWRDWN = 0x07; // Enter "standby", will wake up on tick EA = 1; poll_cnt++; } }
static void gzp_process_address_req(uint8_t* gzp_req) { uint8_t temp_rx_pipes, temp_host_mode; uint8_t pairing_resp[GZP_CMD_HOST_ADDRESS_RESP_PAYLOAD_LENGTH]; gzp_address_exchanged_f = false; gzll_goto_idle(); temp_rx_pipes = gzll_get_param(GZLL_PARAM_RX_PIPES); temp_host_mode = gzll_get_param(GZLL_PARAM_HOST_MODE); // If requesting Device within close proximity if(gzll_rx_power_high()) { gzll_set_param(GZLL_PARAM_RX_PIPES, 0); gzll_set_param(GZLL_PARAM_HOST_MODE, 0); gzll_set_param(GZLL_PARAM_RX_TIMEOUT, GZP_CLOSE_PROXIMITY_BACKOFF_RX_TIMEOUT); gzll_rx_fifo_flush(); // Start "proximity" back off period gzll_rx_start(); while(gzll_get_state() != GZLL_IDLE) ; // Build pairing response packet pairing_resp[0] = GZP_CMD_HOST_ADDRESS_RESP; gzp_host_chip_id_read(&pairing_resp[GZP_CMD_HOST_ADDRESS_RESP_ADDRESS], GZP_SYSTEM_ADDRESS_WIDTH); gzll_ack_payload_write(&pairing_resp[0], GZP_CMD_HOST_ADDRESS_RESP_PAYLOAD_LENGTH, 0); gzll_set_param(GZLL_PARAM_RX_TIMEOUT, GZP_STEP1_RX_TIMEOUT); // Enable only pairing pipe when waiting for pairing request step 1 gzll_set_param(GZLL_PARAM_RX_PIPES, (1 << GZP_PAIRING_PIPE)); gzll_rx_start(); while(gzll_get_state() != GZLL_IDLE) { if(gzll_rx_fifo_read(&gzp_req[0], NULL, NULL)) { // Validate step 1 of pairing request if(gzp_req[0] == GZP_CMD_HOST_ADDRESS_FETCH) { gzp_address_exchanged_f = true; } } } gzll_tx_fifo_flush(); gzll_rx_fifo_flush(); gzll_set_param(GZLL_PARAM_RX_TIMEOUT, 0); gzll_set_param(GZLL_PARAM_RX_PIPES, temp_rx_pipes); gzll_set_param(GZLL_PARAM_HOST_MODE, temp_host_mode); // Return to normal operation gzll_rx_start(); } else { gzll_set_param(GZLL_PARAM_RX_PIPES, temp_rx_pipes & ~(1 << GZP_PAIRING_PIPE)); gzll_set_param(GZLL_PARAM_RX_TIMEOUT, GZP_NOT_PROXIMITY_BACKOFF_RX_TIMEOUT); // Start "not proximity" backoff period gzll_rx_start(); } }
void gzp_host_execute() { uint8_t rx_pipe; uint8_t payload_length; uint8_t rx_payload[GZLL_MAX_FW_PAYLOAD_LENGTH]; gzp_address_exchanged_f = false; rx_pipe = gzll_get_rx_data_ready_pipe_number(); if((rx_pipe == GZP_PAIRING_PIPE) || ((rx_pipe == GZP_DATA_PIPE) && (gzp_encrypted_user_data_length == 0))) { gzll_rx_fifo_read(rx_payload, &payload_length, NULL); switch(rx_payload[0]) { case GZP_CMD_HOST_ADDRESS_REQ: gzp_process_address_req(rx_payload); break; #ifndef GZP_CRYPT_DISABLE case GZP_CMD_HOST_ID_REQ: gzp_process_id_req(rx_payload); break; case GZP_CMD_HOST_ID_FETCH: gzp_process_id_fetch(rx_payload); break; case GZP_CMD_KEY_UPDATE_PREPARE: gzp_process_key_update_prepare(); break; case GZP_CMD_KEY_UPDATE: gzp_process_key_update(rx_payload); break; case GZP_CMD_ENCRYPTED_USER_DATA: gzp_process_encrypted_user_data(rx_payload, payload_length); break; #endif case GZP_CMD_FETCH_RESP: default: break; } } // Restart reception if "not proximity backoff" period has elapsed if(gzll_get_state() == GZLL_IDLE) { gzll_set_param(GZLL_PARAM_RX_TIMEOUT, 0); if(gzp_pairing_enabled_f) { gzll_set_param(GZLL_PARAM_RX_PIPES, gzll_get_param(GZLL_PARAM_RX_PIPES) | (1 << GZP_PAIRING_PIPE)); } gzll_rx_start(); } #ifndef GZP_CRYPT_DISABLE gzp_session_counter_inc(); #endif }
bool gzp_address_req_send(uint8_t idx) { uint8_t i; bool retval = false; uint8_t address_req[GZP_CMD_HOST_ADDRESS_REQ_PAYLOAD_LENGTH]; uint8_t rx_payload[GZLL_MAX_PAYLOAD_LENGTH]; uint16_t temp_power, temp_tx_timeout, temp_device_mode; if(gzll_get_state() == GZLL_IDLE) { // Store parameters that are temporarily changed temp_tx_timeout = gzll_get_param(GZLL_PARAM_TX_TIMEOUT); temp_power = gzll_get_param(GZLL_PARAM_OUTPUT_POWER); temp_device_mode = gzll_get_param(GZLL_PARAM_DEVICE_MODE); // Modify parameters gzll_set_param(GZLL_PARAM_TX_TIMEOUT, GZP_REQ_TX_TIMEOUT); gzll_set_param(GZLL_PARAM_OUTPUT_POWER, GZP_POWER); gzll_set_param(GZLL_PARAM_DEVICE_MODE, 0); // Flush RX FIFO gzll_rx_fifo_flush(); // Build "request" packet address_req[0] = GZP_CMD_HOST_ADDRESS_REQ; // Send a number of packets in order to broadcast that devices not within // close proximity must back off. for(i = 0; i < GZP_MAX_BACKOFF_PACKETS; i++) { if(!gzp_tx_packet(address_req, GZP_CMD_HOST_ADDRESS_REQ_PAYLOAD_LENGTH, 0)) { break; } } gzp_delay_rx_periods(GZP_TX_ACK_WAIT_TIMEOUT); // Send message for fetching pairing response from host. address_req[0] = GZP_CMD_HOST_ADDRESS_FETCH; if(gzp_tx_packet(&address_req[0], GZP_CMD_HOST_ADDRESS_REQ_PAYLOAD_LENGTH, 0)) { // If pairing response received if(gzll_rx_fifo_read(rx_payload, NULL, NULL)) { if(rx_payload[0] == GZP_CMD_HOST_ADDRESS_RESP) { memcpy(gzp_system_address, &rx_payload[GZP_CMD_HOST_ADDRESS_RESP_ADDRESS], GZP_SYSTEM_ADDRESS_WIDTH); gzp_update_radio_params(&rx_payload[GZP_CMD_HOST_ADDRESS_RESP_ADDRESS]); pairing_list_addr_write(idx, gzp_system_address); retval = true; } } } else { gzp_delay_rx_periods(GZP_NOT_PROXIMITY_BACKOFF_RX_TIMEOUT - GZP_TX_ACK_WAIT_TIMEOUT); } gzp_delay_rx_periods(GZP_STEP1_RX_TIMEOUT); // Clean-up and restore parameters temporarily modified gzll_rx_fifo_flush(); gzll_tx_fifo_flush(); gzll_set_param(GZLL_PARAM_TX_TIMEOUT, temp_tx_timeout); gzll_set_param(GZLL_PARAM_OUTPUT_POWER, temp_power); gzll_set_param(GZLL_PARAM_DEVICE_MODE, temp_device_mode); } return retval; }