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/*
* spreadspace avr utils
*
*
* Copyright (C) 2013 Christian Pointner <equinox@spreadspace.org>
* Othmar Gsenger <otti@wirdorange.org>
*
* This file is part of spreadspace avr utils.
*
* spreadspace avr utils is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* spreadspace avr utils is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
*/
#include "LUFA/Drivers/Peripheral/TWI.h"
#include <stdio.h>
#include "rda1846.h"
#include "rda1846_defines.h"
static uint8_t rda1846_write_register_raw(const uint8_t addr, const uint16_t data)
{
if(TWI_StartTransmission(RDA1846_CHIP_ADDR | TWI_ADDRESS_WRITE,10) != TWI_ERROR_NoError)
return 1;
if(!TWI_SendByte(addr | RDA1846_ADDR_W))
goto i2c_error;
if(!TWI_SendByte((uint8_t)(data>>8)))
goto i2c_error;
if(!TWI_SendByte((uint8_t)data))
goto i2c_error;
TWI_StopTransmission();
return 0;
i2c_error:
TWI_StopTransmission();
return 1;
}
static uint8_t rda1846_read_register_raw(const uint8_t addr, uint16_t* data)
{
if(TWI_StartTransmission(RDA1846_CHIP_ADDR | TWI_ADDRESS_WRITE,10) != TWI_ERROR_NoError)
return 1;
if(!TWI_SendByte(addr | RDA1846_ADDR_R))
goto i2c_error;
if(TWI_StartTransmission(RDA1846_CHIP_ADDR | TWI_ADDRESS_READ,10) != TWI_ERROR_NoError)
goto i2c_error;
uint8_t tmp;
if(!TWI_ReceiveByte(&tmp, 0))
goto i2c_error;
*data = tmp << 8;
if(!TWI_ReceiveByte(&tmp, 1))
goto i2c_error;
*data |= tmp;
TWI_StopTransmission();
return 0;
i2c_error:
TWI_StopTransmission();
return 1;
}
static uint8_t rda1846_write_register(const uint8_t addr, const uint16_t data)
{
if(addr < RDA1846_ADDR_LIMIT)
return rda1846_write_register_raw(addr, data);
if(addr > RDA1846_ADDR_LIMIT) {
uint8_t ret = rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 1);
if(ret) return ret;
ret = rda1846_write_register_raw(addr, data);
if(ret) return ret;
return rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 0);
}
return 1;
}
static uint8_t rda1846_read_register(const uint8_t addr, uint16_t* data)
{
if(addr < RDA1846_ADDR_LIMIT)
return rda1846_read_register_raw(addr, data);
if(addr > RDA1846_ADDR_LIMIT) {
uint8_t ret = rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 1);
if(ret) return ret;
ret = rda1846_read_register_raw(addr - RDA1846_ADDR_LIMIT + 1, data);
if(ret) return ret;
return rda1846_write_register_raw(RDA1846_ADDR_LIMIT, 0);
}
return 1;
}
void rda1846_init(void)
{
TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 200000));
// switch to 2m Band (134 ~ 174 MHz)
rda1846_write_register(RDA1846_REG_RF_BAND, RDA1846_RF_BAND_2M);
// set crystal frequency (12.288 MHz)
rda1846_write_register(RDA1846_REG_XTAL, RDA1846_XTAL_FREQ);
rda1846_write_register(RDA1846_REG_ADCLK, RDA1846_ADCLK_FREQ);
rda1846_write_register(RDA1846_REG_CLK_MODE, RDA1846_CLK_MODE);
rda1846_write_register(RDA1846_REG_CTL, RDA1846_CTL_CH_12K5 | RDA1846_CTL_RX_M_TX_M | RDA1846_CTL_RX);
rda1846_write_register(RDA1846_REG_INT, RDA1846_INT_DTMF_IDLE);
// use this if VOX, SQ, TXON_RF, RXON_RF are meant as outputs
rda1846_write_register(RDA1846_REG_GPIO, RDA1846_GPIO_7_VOX | RDA1846_GPIO_6_SQ |
RDA1846_GPIO_5_TXON_RF | RDA1846_GPIO_4_RXON_RF |
RDA1846_GPIO_2_INT);
// use this if VOX, SQ, TXON_RF, RXON_RF are meant as inputs
// rda1846_write_register(RDA1846_REG_GPIO, RDA1846_GPIO_2_INT);
rda1846_write_register(RDA1846_REG_TX_VOICE, RDA1846_TX_VOICE_NONE);
rda1846_write_register(RDA1846_REG_DTMF_CTL, RDA1846_DTMF_DUAL | RDA1846_DTMF_EN);
}
void rda1846_soft_reset(void)
{
rda1846_write_register(RDA1846_REG_CTL, RDA1846_CTL_SOFT_RST);
}
int16_t rda1846_get_rssi(void)
{
uint16_t data;
if(rda1846_read_register(RDA1846_REG_RSSI, &data))
return -1;
return (int16_t)data;
}
int16_t rda1846_get_vssi(void)
{
uint16_t data;
if(rda1846_read_register(RDA1846_REG_VSSI, &data))
return -1;
return (int16_t)data;
}
uint16_t rda1846_get_flags(void)
{
uint16_t data;
if(rda1846_read_register(RDA1846_REG_FLAG, &data))
return 0xFFFF;
return data;
}
uint8_t rda1846_get_dtmf(uint8_t* idx1, uint8_t* idx2, uint8_t* code)
{
uint16_t data;
if(rda1846_read_register(RDA1846_REG_DTMF_OUT, &data))
return 1;
if(idx1) *idx1 = (uint8_t)((data & 0x0380)>>7);
if(idx2) *idx2 = (uint8_t)((data & 0x0070)>>4);
if(code) *code = (uint8_t)(data & 0x000F);
return 0;
}
int32_t rda1846_get_freq_kHz(void)
{
int32_t freq;
uint16_t data;
uint8_t ret = rda1846_read_register(RDA1846_REG_FREQH, &data);
if(ret)
return -1;
freq = (((uint32_t)data)<<16);
ret = rda1846_read_register(RDA1846_REG_FREQL, &data);
if(ret)
return -1;
freq |= data;
return (freq>>3);
}
uint8_t rda1846_set_freq_kHz(int32_t freq)
{
if(freq < RDA1846_BAND_LOW || freq > RDA1846_BAND_HIGH)
return 1;
freq = freq<<3;
uint8_t ret = rda1846_write_register(RDA1846_REG_FREQH, (uint16_t)(freq>>16));
if(ret)
return 1;
return rda1846_write_register(RDA1846_REG_FREQL, (uint16_t)(freq & 0x0000FFFF));
}
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