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121 lines
4.0 KiB
C
121 lines
4.0 KiB
C
/*
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* Copyright (C) 2019 Otto-von-Guericke-Universität Magdeburg
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup drivers_nrf24l01p_ng
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* @{
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*
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* @file
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* @brief Implementation of state transition procedures
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* for the NRF24L01+ (NG) transceiver
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*
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* @author Fabian Hüßler <fabian.huessler@ovgu.de>
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* @}
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*/
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#include <assert.h>
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#include <string.h>
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#define ENABLE_DEBUG 0
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#include "debug.h"
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#include "xtimer.h"
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#include "net/netopt.h"
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#include "nrf24l01p_ng_registers.h"
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#include "nrf24l01p_ng_communication.h"
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#include "nrf24l01p_ng_states.h"
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static void _restore_address_p0(const nrf24l01p_ng_t *dev)
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{
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uint8_t addr_buffer[NRF24L01P_NG_ADDR_WIDTH];
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memcpy(addr_buffer, NRF24L01P_NG_ADDR_P0(dev), NRF24L01P_NG_ADDR_WIDTH);
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nrf24l01p_ng_write_reg(dev, NRF24L01P_NG_REG_RX_ADDR_P0, addr_buffer,
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NRF24L01P_NG_ADDR_WIDTH);
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nrf24l01p_ng_reg8_write(dev, NRF24L01P_NG_REG_SETUP_AW,
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NRF24L01P_NG_FLG_AW(nrf24l01p_ng_valtoe_aw(NRF24L01P_NG_ADDR_WIDTH)));
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}
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void nrf24l01p_ng_transition_to_power_down(nrf24l01p_ng_t *dev)
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{
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DEBUG_PUTS("[nrf24l01p_ng] transition to POWER_DOWN");
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assert(dev->state & NRF24L01P_NG_TRANSITION_TO_POWER_DOWN);
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uint8_t config = NRF24L01P_NG_FLG_PWR_UP;
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nrf24l01p_ng_reg8_clear(dev, NRF24L01P_NG_REG_CONFIG, &config);
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dev->state = NRF24L01P_NG_STATE_POWER_DOWN;
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}
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void nrf24l01p_ng_transition_to_standby_1(nrf24l01p_ng_t *dev)
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{
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DEBUG_PUTS("[nrf24l01p_ng] transition to STANDBY_1");
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assert(dev->state & NRF24L01P_NG_TRANSITION_TO_STANDBY_1);
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switch (dev->state) {
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case NRF24L01P_NG_STATE_POWER_DOWN:
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gpio_clear(dev->params.pin_ce);
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uint8_t config = NRF24L01P_NG_FLG_PWR_UP;
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nrf24l01p_ng_reg8_set(dev, NRF24L01P_NG_REG_CONFIG, &config);
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xtimer_usleep(NRF24L01P_NG_DELAY_US_START_UP);
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break;
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case NRF24L01P_NG_STATE_RX_MODE:
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gpio_clear(dev->params.pin_ce);
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break;
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case NRF24L01P_NG_STATE_STANDBY_2:
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case NRF24L01P_NG_STATE_TX_MODE:
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gpio_clear(dev->params.pin_ce);
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_restore_address_p0(dev);
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/* TX finished with one packet */
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break;
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default:
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return;
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}
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dev->state = NRF24L01P_NG_STATE_STANDBY_1;
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}
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void nrf24l01p_ng_transition_to_standby_2(nrf24l01p_ng_t *dev)
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{
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DEBUG_PUTS("[nrf24l01p_ng] transition to STANDBY_2");
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assert(dev->state & NRF24L01P_NG_TRANSITION_TO_STANDBY_2);
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switch (dev->state) {
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case NRF24L01P_NG_STATE_STANDBY_1:;
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/* TX FIFO empty */
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uint8_t config = NRF24L01P_NG_FLG_PRIM_RX;
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nrf24l01p_ng_reg8_clear(dev, NRF24L01P_NG_REG_CONFIG, &config);
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gpio_set(dev->params.pin_ce);
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break;
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case NRF24L01P_NG_STATE_TX_MODE:
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gpio_set(dev->params.pin_ce);
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break;
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default:
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return;
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}
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dev->state = NRF24L01P_NG_STATE_STANDBY_2;
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}
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void nrf24l01p_ng_transition_to_rx_mode(nrf24l01p_ng_t *dev)
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{
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DEBUG_PUTS("[nrf24l01p_ng] transition to RX_MODE");
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assert(dev->state & NRF24L01P_NG_TRANSITION_TO_RX_MODE);
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if (nrf24l01p_ng_reg8_read(dev, NRF24L01P_NG_REG_FIFO_STATUS) &
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NRF24L01P_NG_FLG_RX_FULL) {
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nrf24l01p_ng_flush_rx(dev);
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}
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uint8_t config = NRF24L01P_NG_FLG_PRIM_RX;
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nrf24l01p_ng_reg8_set(dev, NRF24L01P_NG_REG_CONFIG, &config);
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gpio_set(dev->params.pin_ce);
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xtimer_usleep(NRF24L01P_NG_DELAY_US_RX_SETTLING);
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dev->state = NRF24L01P_NG_STATE_RX_MODE;
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}
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void nrf24l01p_ng_transition_to_tx_mode(nrf24l01p_ng_t *dev)
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{
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DEBUG_PUTS("[nrf24l01p_ng] transition to TX_MODE");
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assert(dev->state & NRF24L01P_NG_TRANSITION_TO_TX_MODE);
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/* TX FIFI not empty */
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uint8_t config = NRF24L01P_NG_FLG_PRIM_RX;
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nrf24l01p_ng_reg8_clear(dev, NRF24L01P_NG_REG_CONFIG, &config);
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dev->state = NRF24L01P_NG_STATE_TX_MODE;
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}
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