Import Mbed OS hard-float snapshot
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Beslan
356
connectivity/drivers/nfc/PN512/source/transceiver/pn512.c
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356
connectivity/drivers/nfc/PN512/source/transceiver/pn512.c
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/*
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* Copyright (c) 2013-2018, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* \file pn512.c
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* \copyright Copyright (c) ARM Ltd 2013
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* \author Donatien Garnier
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* \details PN512 implementation of the transceiver interface
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*/
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#define __DEBUG__ 4
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#ifndef __MODULE__
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#define __MODULE__ "pn512.c"
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#endif
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#include "stack/nfc_errors.h"
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#include "stdlib.h"
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#include "acore/ac_buffer.h"
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#include "transceiver/transceiver.h"
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#include "transceiver/protocols.h"
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#include "pn512_rf.h"
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#include "pn512_registers.h"
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#include "pn512_cmd.h"
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#include "pn512_hw.h"
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#include "pn512_irq.h"
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#include "pn512_poll.h"
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#include "pn512_transceive.h"
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#include "pn512_internal.h"
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#include "pn512.h"
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#define DEFAULT_READER_TRANSCEIVE_TIMEOUT 100
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#define DEFAULT_TARGET_TRANSCEIVE_TIMEOUT -1
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//Prototypes
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#include "pn512_internal.h"
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/** \addtogroup PN512
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* @{
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* \name Transceiver
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* \details Implementation of the transceiver interface
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* @{
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*/
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//PN 512 VTABLE
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static const transceiver_impl_t pn512_impl = {
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.set_protocols = pn512_set_protocols,
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.poll = pn512_poll,
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.transceive = pn512_transceive,
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.abort = pn512_abort,
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.set_crc = pn512_set_crc,
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.set_timeout = pn512_set_timeout,
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.set_transceive_options = pn512_set_transceive_options,
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.set_transceive_framing = pn512_set_transceive_framing,
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.set_write = pn512_set_write,
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.get_read = pn512_get_read,
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.set_last_byte_length = pn512_set_last_byte_length,
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.get_last_byte_length = pn512_get_last_byte_length,
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.set_first_byte_align = pn512_set_first_byte_align,
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.close = pn512_close,
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.sleep = pn512_sleep
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};
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/** Initialize PN512 transceiver
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* \param pPN512 pointer to pn512_t structure to initialize
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* \param pTransport pointer to already initialized nfc_transport_t structure
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* \return NFC_OK (0) on success or NFC_ERR_* error on failure
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*/
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nfc_err_t pn512_init(pn512_t *pPN512, nfc_transport_t *pTransport, nfc_scheduler_timer_t *pTimer)
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{
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////
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//For Self-test
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////
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#if NFC_PN512_SELFTEST
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const uint8_t null_array[25] = {0};
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#endif
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////
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uint8_t r;
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//Init transceiver
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transceiver_init((nfc_transceiver_t *)pPN512, pTransport, pTimer);
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//Init buffer
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ac_buffer_builder_init(&pPN512->readBufBldr, pPN512->payload, 256);
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pPN512->readFirstByteAlign = 0;
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pPN512->readLastByteLength = 8;
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pPN512->writeLastByteLength = 8;
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//Populate functions
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pPN512->transceiver.fn = &pn512_impl;
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//Init variables
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memset(&pPN512->config.initiators, 0, sizeof(nfc_tech_t));
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memset(&pPN512->config.targets, 0, sizeof(nfc_tech_t));
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pPN512->timeout = -1;
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pPN512->nextFrameMode = pn512_transceive_mode_transceive;
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pn512_hw_init(pPN512);
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pn512_registers_init(pPN512); //Cannot switch page now
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pn512_cmd_init(pPN512);
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pn512_cmd_exec(pPN512, PN512_CMD_SOFTRST);
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pn512_cmd_wait_idle(pPN512, -1);
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//pn512_registers_init(pPN512);
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//Put into known state
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pn512_registers_reset(pPN512);
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pPN512->transceive.mode = pn512_transceive_mode_idle;
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pn512_irq_clear(pPN512, PN512_IRQ_ALL);
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pn512_fifo_clear(pPN512);
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pn512_cmd_exec(pPN512, PN512_CMD_IDLE);
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pn512_cmd_wait_idle(pPN512, -1);
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pn512_rf_field_switch_off(pPN512);
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//Required for polling loop
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srand(4242);
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#if NFC_PN512_SELFTEST // Self test
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pn512_cmd_exec(pPN512, PN512_CMD_SOFTRST);
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pn512_cmd_wait_idle(pPN512, -1);
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const uint8_t null_array_buf[25] = {0}; //FIXME
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ac_buffer_t null_array;
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ac_buffer_init(&null_array, null_array_buf, 25);
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//Perform self test
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pn512_fifo_write(pPN512, &null_array);
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pn512_cmd_exec(pPN512, PN512_CMD_CONFIG);
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while (pn512_cmd_get(pPN512) != PN512_CMD_IDLE);
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pn512_register_write(pPN512, PN512_REG_AUTOTEST, 0x09);
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ac_buffer_init(&null_array, null_array_buf, 1);
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pn512_fifo_write(pPN512, &null_array);
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pn512_cmd_exec(pPN512, PN512_CMD_CRC);
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while (pn512_cmd_get(pPN512) != PN512_CMD_IDLE);
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DBGX_ENTER();
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NFC_DBG("Test result:");
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while (pn512_fifo_length(pPN512)) {
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ac_buffer_builder_t read_byte;
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ac_buffer_builder_init(&read_byte, null_array_buf, 1);
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pn512_fifo_read(pPN512, &read_byte);
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DBGX("%02x ", null_array_buf[0]);
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}
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DBGX("\n");
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DBGX_LEAVE();
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#endif
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r = pn512_register_read(pPN512, PN512_REG_VERSION);
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NFC_DBG_BLOCK(
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NFC_DBG("PN512 version %02x", r);
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)
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if ((r != 0x82) && (r != 0xB1) && (r != 0xB2)) {
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return NFC_ERR_UNSUPPORTED; //PN512 not found
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}
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return NFC_OK;
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}
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/** Get pointer to nfc_transceiver_t structure
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* \param pPN512 pointer to pn512_t instance
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* \return pointer to initialized nfc_transceiver_t instance
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*/
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nfc_transceiver_t *pn512_get_transceiver(pn512_t *pPN512)
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{
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return &pPN512->transceiver;
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}
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void pn512_set_protocols(nfc_transceiver_t *pTransceiver, nfc_tech_t initiators, nfc_tech_t targets, polling_options_t options)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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//If different, reconfigure
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if (memcmp(&initiators, &pPN512->config.initiators, sizeof(nfc_tech_t)) || memcmp(&targets, &pPN512->config.targets, sizeof(nfc_tech_t))) {
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pPN512->config.initiators = initiators;
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if (memcmp(&targets, &pPN512->config.targets, sizeof(nfc_tech_t))) {
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pPN512->config.targets = targets;
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pn512_poll_setup(pPN512);
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}
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pTransceiver->initiator_ntarget = false;
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memset(&pTransceiver->active_tech, 0, sizeof(nfc_tech_t));
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}
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pPN512->config.options = options;
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}
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void pn512_poll(nfc_transceiver_t *pTransceiver)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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pPN512->nextFrameMode = pn512_transceive_mode_transceive;
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pn512_poll_hw(pPN512, pn512_transceiver_callback);
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}
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void pn512_set_crc(nfc_transceiver_t *pTransceiver, bool crc_out, bool crc_in)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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pn512_framing_crc_set(pPN512, crc_out, crc_in);
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}
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void pn512_set_timeout(nfc_transceiver_t *pTransceiver, int timeout)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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pPN512->timeout = timeout;
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}
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void pn512_set_transceive_options(nfc_transceiver_t *pTransceiver, bool transmit, bool receive, bool repoll)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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if (transmit && receive) {
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pPN512->nextFrameMode = pn512_transceive_mode_transceive;
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} else if (transmit && repoll) {
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pPN512->nextFrameMode = pn512_transceive_mode_transmit_and_target_autocoll;
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} else if (transmit) {
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pPN512->nextFrameMode = pn512_transceive_mode_transmit;
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} else if (receive) {
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pPN512->nextFrameMode = pn512_transceive_mode_receive;
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} else {
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pPN512->nextFrameMode = pn512_transceive_mode_target_autocoll;
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}
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}
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void pn512_set_transceive_framing(nfc_transceiver_t *pTransceiver, nfc_framing_t framing)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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pn512_framing_set(pPN512, framing);
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//Switch NFC tech if NFC DEP
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if (pTransceiver->active_tech.nfc_nfc_dep_a
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|| pTransceiver->active_tech.nfc_nfc_dep_f_212
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|| pTransceiver->active_tech.nfc_nfc_dep_f_424) {
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//FIXME
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pTransceiver->active_tech.nfc_nfc_dep_a = 0;
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pTransceiver->active_tech.nfc_nfc_dep_f_212 = 0;
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pTransceiver->active_tech.nfc_nfc_dep_f_424 = 0;
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switch (framing) {
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case nfc_framing_target_a_106:
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case nfc_framing_initiator_a_106:
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pTransceiver->active_tech.nfc_nfc_dep_a = 1;
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break;
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case nfc_framing_target_f_212:
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case nfc_framing_initiator_f_212:
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pTransceiver->active_tech.nfc_nfc_dep_f_212 = 1;
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break;
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case nfc_framing_target_f_424:
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case nfc_framing_initiator_f_424:
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pTransceiver->active_tech.nfc_nfc_dep_f_424 = 1;
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break;
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default:
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break;
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}
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}
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}
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void pn512_set_write(nfc_transceiver_t *pTransceiver, ac_buffer_t *pWriteBuf)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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if (pWriteBuf == NULL) {
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ac_buffer_init(&pPN512->writeBuf, NULL, 0);
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return;
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}
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ac_buffer_dup(&pPN512->writeBuf, pWriteBuf);
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}
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ac_buffer_t *pn512_get_read(nfc_transceiver_t *pTransceiver)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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return ac_buffer_builder_buffer(&pPN512->readBufBldr);
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}
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void pn512_set_last_byte_length(nfc_transceiver_t *pTransceiver, size_t lastByteLength)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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if ((lastByteLength > 8) || (lastByteLength == 0)) {
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lastByteLength = 8;
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}
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pPN512->writeLastByteLength = lastByteLength;
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}
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void pn512_set_first_byte_align(nfc_transceiver_t *pTransceiver, size_t firstByteAlign)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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firstByteAlign &= 0x7;
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pPN512->readFirstByteAlign = firstByteAlign;
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}
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size_t pn512_get_last_byte_length(nfc_transceiver_t *pTransceiver)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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return pPN512->readLastByteLength;
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}
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void pn512_transceive(nfc_transceiver_t *pTransceiver)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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pn512_transceive_hw(pPN512, pPN512->nextFrameMode, pn512_transceiver_callback);
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pPN512->nextFrameMode = pn512_transceive_mode_transceive;
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}
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void pn512_abort(nfc_transceiver_t *pTransceiver)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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nfc_scheduler_dequeue_task(&pTransceiver->scheduler, true, &pPN512->transceiver.task);
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}
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void pn512_close(nfc_transceiver_t *pTransceiver)
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{
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//pn512_t* pPN512 = (pn512_t*) pTransceiver;
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(void) pTransceiver;
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//TODO
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return;
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}
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void pn512_sleep(nfc_transceiver_t *pTransceiver, bool sleep)
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{
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pn512_t *pPN512 = (pn512_t *) pTransceiver;
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if (sleep) {
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pn512_register_write(pPN512, PN512_REG_COMMAND, 0x30); //Receiver off + soft power down
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} else {
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pn512_register_write(pPN512, PN512_REG_COMMAND, 0x00);
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while (pn512_register_read(pPN512, PN512_REG_COMMAND) & 0x10);
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}
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}
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void pn512_transceiver_callback(pn512_t *pPN512, nfc_err_t ret)
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{
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transceiver_callback(&pPN512->transceiver, ret);
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}
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/**
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* @}
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* @}
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* */
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