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/**
* The MIT License (MIT)
*
* Copyright (c) 2013 Paulo B. de Oliveira Filho <pauloborgesfilho@gmail.com>
* Copyright (c) 2013 Claudio Takahasi <claudio.takahasi@gmail.com>
* Copyright (c) 2013 João Paulo Rechi Vita <jprvita@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <string.h>
#include <nrf51.h>
#include <nrf51_bitfields.h>
#include "nrf51822.h"
#include "radio.h"
#define MAX_BUF_LEN (RADIO_MAX_PDU_LEN + 1) /* S0, LEN
and S1 occupies 3 bytes, not 2 */
static radio_handler handler;
static uint8_t buf[MAX_BUF_LEN];
void RADIO_IRQHandler(void)
{
NRF_RADIO->EVENTS_END = 0UL;
}
void radio_register_handler(radio_handler hdlr)
{
handler = hdlr;
}
int16_t radio_init(void)
{
if (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0UL) {
NRF_CLOCK->TASKS_HFCLKSTART = 1UL;
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0UL);
}
NRF_RADIO->MODE = RADIO_MODE_MODE_Ble_1Mbit << RADIO_MODE_MODE_Pos;
NRF_RADIO->TXPOWER = RADIO_TXPOWER_TXPOWER_0dBm
<< RADIO_TXPOWER_TXPOWER_Pos;
NRF_RADIO->PCNF1 = (RADIO_PCNF1_WHITEEN_Enabled
<< RADIO_PCNF1_WHITEEN_Pos)
| (MAX_BUF_LEN << RADIO_PCNF1_MAXLEN_Pos)
| (3UL << RADIO_PCNF1_BALEN_Pos);
NRF_RADIO->RXADDRESSES = 1UL;
NRF_RADIO->TXADDRESS = 0UL;
NRF_RADIO->CRCCNF = (RADIO_CRCCNF_LEN_Three << RADIO_CRCCNF_LEN_Pos) |
(RADIO_CRCCNF_SKIP_ADDR_Skip << RADIO_CRCCNF_SKIP_ADDR_Pos);
NRF_RADIO->CRCPOLY = 0x100065B;
/* FIXME: These header sizes only works for advertise channel PDUs */
NRF_RADIO->PCNF0 = (1UL << RADIO_PCNF0_S0LEN_Pos) | /* 1 byte */
(6UL << RADIO_PCNF0_LFLEN_Pos) | /* 6 bits */
(2UL << RADIO_PCNF0_S1LEN_Pos); /* 2 bits */
NRF_RADIO->SHORTS = (RADIO_SHORTS_READY_START_Enabled
<< RADIO_SHORTS_READY_START_Pos)
| (RADIO_SHORTS_END_DISABLE_Enabled
<< RADIO_SHORTS_END_DISABLE_Pos);
NRF_RADIO->INTENSET = RADIO_INTENSET_END_Msk;
NVIC_SetPriority(RADIO_IRQn, IRQ_PRIORITY_HIGH);
NVIC_ClearPendingIRQ(RADIO_IRQn);
NVIC_EnableIRQ(RADIO_IRQn);
NRF_RADIO->PACKETPTR = (uint32_t) buf;
memset(buf, 0, sizeof(buf));
handler = NULL;
return 0;
}
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