154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
|
|
/*
|
|
* Copyright (c) 2013-2018, ARM Limited, All Rights Reserved
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
* not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
/**
|
|
* \file pn512_registers.c
|
|
* \copyright Copyright (c) ARM Ltd 2013
|
|
* \author Donatien Garnier
|
|
* \details Access to PN512 registers
|
|
*/
|
|
|
|
|
|
#define __DEBUG__ 0
|
|
#ifndef __MODULE__
|
|
#define __MODULE__ "pn512_registers.c"
|
|
#endif
|
|
#include "stack/nfc_errors.h"
|
|
|
|
#include "pn512_registers.h"
|
|
#include "pn512_hw.h"
|
|
#include "pn512.h"
|
|
|
|
#define REGISTER_PAGE(x) ((x)>>4)
|
|
#define REGISTER_ADDR(x) ((x)&0xF)
|
|
|
|
/** \addtogroup PN512
|
|
* \internal
|
|
* @{
|
|
* \name Registers
|
|
* @{
|
|
*/
|
|
|
|
static void pn512_register_switch_page_intl(pn512_t *pPN512, uint8_t page);
|
|
|
|
/** \internal Initialize underlying pn512_registers_t structure
|
|
* \param pPN512 pointer to pn512_t structure
|
|
*/
|
|
void pn512_registers_init(pn512_t *pPN512)
|
|
{
|
|
pPN512->registers.registers_page = 0;
|
|
}
|
|
|
|
#define PN512_CFG_INIT_LEN 9
|
|
static const uint8_t PN512_CFG_INIT_REGS[] = {
|
|
PN512_REG_DIVIEN,
|
|
PN512_REG_MODE,
|
|
PN512_REG_GSNOFF,
|
|
PN512_REG_RFCFG,
|
|
PN512_REG_CWGSP,
|
|
PN512_REG_MIFNFC,
|
|
PN512_REG_FELNFC2,
|
|
PN512_REG_RXSEL,
|
|
PN512_REG_TYPEB
|
|
};
|
|
static const uint8_t PN512_CFG_INIT_VALS[] = {
|
|
0x80,
|
|
0x3F,
|
|
0xF2,
|
|
0x68,
|
|
0x3F,
|
|
0x62,
|
|
0x80,
|
|
0x84,
|
|
0x00
|
|
}; //Timer: For now max prescaler, max reload value
|
|
|
|
/** \internal Switch to known (0) registers page, reset registers state
|
|
* \param pPN512 pointer to pn512_t structure
|
|
*/
|
|
void pn512_registers_reset(pn512_t *pPN512)
|
|
{
|
|
pn512_register_switch_page_intl(pPN512, 0);
|
|
for (int i = 0; i < PN512_CFG_INIT_LEN; i++) {
|
|
pn512_register_write(pPN512, PN512_CFG_INIT_REGS[i], PN512_CFG_INIT_VALS[i]);
|
|
}
|
|
}
|
|
|
|
/** \internal Write register
|
|
* \param pPN512 pointer to pn512_t structure
|
|
* \param address register address
|
|
* \param data value to write in register
|
|
*/
|
|
void pn512_register_write(pn512_t *pPN512, uint8_t address, uint8_t data)
|
|
{
|
|
NFC_DBG("Write [%02x] << %02x", address, data);
|
|
if (REGISTER_PAGE(address) != pPN512->registers.registers_page) {
|
|
pn512_register_switch_page_intl(pPN512, REGISTER_PAGE(address));
|
|
}
|
|
address = REGISTER_ADDR(address);
|
|
pn512_hw_write(pPN512, address, &data, 1);
|
|
}
|
|
|
|
/** \internal Read register
|
|
* \param pPN512 pointer to pn512_t structure
|
|
* \param address register address
|
|
* \return data value read from register
|
|
*/
|
|
uint8_t pn512_register_read(pn512_t *pPN512, uint8_t address)
|
|
{
|
|
uint8_t data;
|
|
NFC_DBG_BLOCK(
|
|
uint8_t __dbg_addr;
|
|
__dbg_addr = address; //FIXME
|
|
)
|
|
if (REGISTER_PAGE(address) != pPN512->registers.registers_page) {
|
|
pn512_register_switch_page_intl(pPN512, REGISTER_PAGE(address));
|
|
}
|
|
address = REGISTER_ADDR(address);
|
|
pn512_hw_read(pPN512, address, &data, 1);
|
|
NFC_DBG("Read [%02x] >> %02x", __dbg_addr, data);
|
|
return data;
|
|
}
|
|
|
|
void pn512_register_switch_page(pn512_t *pPN512, uint8_t address)
|
|
{
|
|
if (REGISTER_PAGE(address) != pPN512->registers.registers_page) {
|
|
pn512_register_switch_page_intl(pPN512, REGISTER_PAGE(address));
|
|
}
|
|
}
|
|
|
|
/** \internal Switch registers page
|
|
* \param pPN512 pointer to pn512_t structure
|
|
* \param page registers page
|
|
*/
|
|
void pn512_register_switch_page_intl(pn512_t *pPN512, uint8_t page)
|
|
{
|
|
uint8_t pageRegValue;
|
|
pageRegValue = (1 << 7) | page;
|
|
|
|
pn512_hw_write(pPN512, PN512_REG_PAGE, &pageRegValue, 1);
|
|
|
|
pPN512->registers.registers_page = page;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* @}
|
|
* @}
|
|
* */
|