cc2500_frsky_shared.c

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#include "cc2500_compat.h"
 
#include "peripherals/cc2500.h"
#include "cc2500_settings.h"
#include "cc2500_rx_spi_common.h"
#include "cc2500_common.h"
#include "cc2500_frsky_common.h"
#include "cc2500_frsky_d.h"
#include "cc2500_frsky_x.h"
#include "cc2500_frsky_shared.h"
 
// betaflight/src/main/rx/cc2500_frsky_shared.c  @ 766c90b
/*
 * This file is part of Cleanflight and Betaflight.
 *
 * Cleanflight and Betaflight are free software. You can redistribute
 * this software and/or modify this software under the terms of the
 * GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * Cleanflight and Betaflight are distributed in the hope that they
 * 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 this software.
 *
 * If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <stdbool.h>
 
//#include "platform.h"
 
#ifdef USE_RX_FRSKY_SPI
 
//#include "common/maths.h"
//
//#include "drivers/rx/rx_cc2500.h"
//#include "drivers/io.h"
//#include "drivers/time.h"
//
//#include "fc/config.h"
//
//#include "pg/rx.h"
//#include "pg/rx_spi.h"
//#include "pg/rx_spi_cc2500.h"
//
//#include "rx/rx.h"
//#include "rx/rx_spi.h"
//#include "rx/rx_spi_common.h"
//
//#include "rx/cc2500_common.h"
//#include "rx/cc2500_frsky_common.h"
//#include "rx/cc2500_frsky_d.h"
//#include "rx/cc2500_frsky_x.h"
//
//#include "cc2500_frsky_shared.h"
 
static rx_spi_protocol_e spiProtocol;
 
static timeMs_t start_time;
static uint8_t protocolState;
 
uint32_t missingPackets;
timeDelta_t timeoutUs;
 
static uint8_t calData[255][3];
static timeMs_t timeTunedMs;
uint8_t listLength;
static uint8_t bindIdx;
static int8_t bindOffset;
 
typedef uint8_t handlePacketFn(uint8_t * const packet, uint8_t * const protocolState);
typedef rx_spi_received_e processFrameFn(uint8_t * const packet);
typedef void setRcDataFn(uint16_t *rcData, const uint8_t *payload);
 
static handlePacketFn *handlePacket;
static processFrameFn *processFrame;
static setRcDataFn *setRcData;
 
static void initialise() {
    cc2500Reset();
    cc2500WriteReg(CC2500_02_IOCFG0,   0x01);
    cc2500WriteReg(CC2500_18_MCSM0,    0x18);
    cc2500WriteReg(CC2500_07_PKTCTRL1, 0x04);
    cc2500WriteReg(CC2500_3E_PATABLE,  0xFF);
    cc2500WriteReg(CC2500_0C_FSCTRL0,  0x00);
    cc2500WriteReg(CC2500_0D_FREQ2,    0x5C);
    cc2500WriteReg(CC2500_13_MDMCFG1,  0x23);
    cc2500WriteReg(CC2500_14_MDMCFG0,  0x7A);
    cc2500WriteReg(CC2500_19_FOCCFG,   0x16);
    cc2500WriteReg(CC2500_1A_BSCFG,    0x6C);
    cc2500WriteReg(CC2500_1B_AGCCTRL2, 0x03);
    cc2500WriteReg(CC2500_1C_AGCCTRL1, 0x40);
    cc2500WriteReg(CC2500_1D_AGCCTRL0, 0x91);
    cc2500WriteReg(CC2500_21_FREND1,   0x56);
    cc2500WriteReg(CC2500_22_FREND0,   0x10);
    cc2500WriteReg(CC2500_23_FSCAL3,   0xA9);
    cc2500WriteReg(CC2500_24_FSCAL2,   0x0A);
    cc2500WriteReg(CC2500_25_FSCAL1,   0x00);
    cc2500WriteReg(CC2500_26_FSCAL0,   0x11);
    cc2500WriteReg(CC2500_29_FSTEST,   0x59);
    cc2500WriteReg(CC2500_2C_TEST2,    0x88);
    cc2500WriteReg(CC2500_2D_TEST1,    0x31);
    cc2500WriteReg(CC2500_2E_TEST0,    0x0B);
    cc2500WriteReg(CC2500_03_FIFOTHR,  0x07);
    cc2500WriteReg(CC2500_09_ADDR,     0x00);
 
    switch (spiProtocol) {
    case RX_SPI_FRSKY_D:
        cc2500WriteReg(CC2500_17_MCSM1,    0x0C);
        cc2500WriteReg(CC2500_0E_FREQ1,    0x76);
        cc2500WriteReg(CC2500_0F_FREQ0,    0x27);
        cc2500WriteReg(CC2500_06_PKTLEN,   0x19);
        cc2500WriteReg(CC2500_08_PKTCTRL0, 0x05);
        cc2500WriteReg(CC2500_0B_FSCTRL1,  0x08);
        cc2500WriteReg(CC2500_10_MDMCFG4,  0xAA);
        cc2500WriteReg(CC2500_11_MDMCFG3,  0x39);
        cc2500WriteReg(CC2500_12_MDMCFG2,  0x11);
        cc2500WriteReg(CC2500_15_DEVIATN,  0x42);
 
        break;
    case RX_SPI_FRSKY_X:
        cc2500WriteReg(CC2500_17_MCSM1,    0x0C);
        cc2500WriteReg(CC2500_0E_FREQ1,    0x76);
        cc2500WriteReg(CC2500_0F_FREQ0,    0x27);
        cc2500WriteReg(CC2500_06_PKTLEN,   0x1E);
        cc2500WriteReg(CC2500_08_PKTCTRL0, 0x01);
        cc2500WriteReg(CC2500_0B_FSCTRL1,  0x0A);
        cc2500WriteReg(CC2500_10_MDMCFG4,  0x7B);
        cc2500WriteReg(CC2500_11_MDMCFG3,  0x61);
        cc2500WriteReg(CC2500_12_MDMCFG2,  0x13);
        cc2500WriteReg(CC2500_15_DEVIATN,  0x51);
 
        break;
    case RX_SPI_FRSKY_X_LBT:
        cc2500WriteReg(CC2500_17_MCSM1,    0x0E);
        cc2500WriteReg(CC2500_0E_FREQ1,    0x80);
        cc2500WriteReg(CC2500_0F_FREQ0,    0x00);
        cc2500WriteReg(CC2500_06_PKTLEN,   0x23);
        cc2500WriteReg(CC2500_08_PKTCTRL0, 0x01);
        cc2500WriteReg(CC2500_0B_FSCTRL1,  0x08);
        cc2500WriteReg(CC2500_10_MDMCFG4,  0x7B);
        cc2500WriteReg(CC2500_11_MDMCFG3,  0xF8);
        cc2500WriteReg(CC2500_12_MDMCFG2,  0x03);
        cc2500WriteReg(CC2500_15_DEVIATN,  0x53);
 
        break;
    default:
 
        break;
    }
 
    for(unsigned c = 0;c < 0xFF; c++)
    { //calibrate all channels
        cc2500Strobe(CC2500_SIDLE);
        cc2500WriteReg(CC2500_0A_CHANNR, c);
        cc2500Strobe(CC2500_SCAL);
        delayMicroseconds(900); //
        calData[c][0] = cc2500ReadReg(CC2500_23_FSCAL3);
        calData[c][1] = cc2500ReadReg(CC2500_24_FSCAL2);
        calData[c][2] = cc2500ReadReg(CC2500_25_FSCAL1);
    }
}
 
void initialiseData(bool inBindState)
{
    cc2500WriteReg(CC2500_0C_FSCTRL0, (uint8_t)rxCc2500SpiConfig()->bindOffset);
    cc2500WriteReg(CC2500_18_MCSM0, 0x8);
    cc2500WriteReg(CC2500_09_ADDR, inBindState ? 0x03 : rxCc2500SpiConfig()->bindTxId[0]);
    cc2500WriteReg(CC2500_07_PKTCTRL1, 0x0D);
    cc2500WriteReg(CC2500_19_FOCCFG, 0x16);
    if (!inBindState) {
        cc2500WriteReg(CC2500_03_FIFOTHR,  0x14);
    }
    delay(10);
}
 
static void initTuneRx(void)
{
    cc2500WriteReg(CC2500_19_FOCCFG, 0x14);
    timeTunedMs = millis();
    bindOffset = -126;
    cc2500WriteReg(CC2500_0C_FSCTRL0, (uint8_t)bindOffset);
    cc2500WriteReg(CC2500_07_PKTCTRL1, 0x0C);
    cc2500WriteReg(CC2500_18_MCSM0, 0x8);
 
    cc2500Strobe(CC2500_SIDLE);
    cc2500WriteReg(CC2500_23_FSCAL3, calData[0][0]);
    cc2500WriteReg(CC2500_24_FSCAL2, calData[0][1]);
    cc2500WriteReg(CC2500_25_FSCAL1, calData[0][2]);
    cc2500WriteReg(CC2500_0A_CHANNR, 0);
    cc2500Strobe(CC2500_SFRX);
    cc2500Strobe(CC2500_SRX);
}
 
static bool tuneRx(uint8_t *packet)
{
    if (bindOffset >= 126) {
        bindOffset = -126;
    }
    if ((millis() - timeTunedMs) > 50) {
        timeTunedMs = millis();
        bindOffset += 5;
        cc2500WriteReg(CC2500_0C_FSCTRL0, (uint8_t)bindOffset);
    }
    if (cc2500getGdo()) {
        uint8_t ccLen = cc2500ReadReg(CC2500_3B_RXBYTES | CC2500_READ_BURST) & 0x7F;
        if (ccLen) {
            cc2500ReadFifo(packet, ccLen);
            if (packet[ccLen - 1] & 0x80) {
                if (packet[2] == 0x01) {
                    uint8_t Lqi = packet[ccLen - 1] & 0x7F;
                    // higher lqi represent better link quality
                    if (Lqi > 50) {
                        rxCc2500SpiConfigMutable()->bindOffset = bindOffset;
                        return true;
                    }
                }
            }
        }
    }
 
    return false;
}
 
static void initGetBind(void)
{
    cc2500Strobe(CC2500_SIDLE);
    cc2500WriteReg(CC2500_23_FSCAL3, calData[0][0]);
    cc2500WriteReg(CC2500_24_FSCAL2, calData[0][1]);
    cc2500WriteReg(CC2500_25_FSCAL1, calData[0][2]);
    cc2500WriteReg(CC2500_0A_CHANNR, 0);
    cc2500Strobe(CC2500_SFRX);
    delayMicroseconds(20); // waiting flush FIFO
 
    cc2500Strobe(CC2500_SRX);
    listLength = 0;
    bindIdx = 0x05;
}
 
static bool getBind1(uint8_t *packet)
{
    // len|bind |tx
    // id|03|01|idx|h0|h1|h2|h3|h4|00|00|00|00|00|00|00|00|00|00|00|00|00|00|00|CHK1|CHK2|RSSI|LQI/CRC|
    // Start by getting bind packet 0 and the txid
    if (cc2500getGdo()) {
        uint8_t ccLen = cc2500ReadReg(CC2500_3B_RXBYTES | CC2500_READ_BURST) & 0x7F;
        if (ccLen) {
            cc2500ReadFifo(packet, ccLen);
            if (packet[ccLen - 1] & 0x80) {
                if (packet[2] == 0x01) {
                    if (packet[5] == 0x00) {
                        rxCc2500SpiConfigMutable()->bindTxId[0] = packet[3];
                        rxCc2500SpiConfigMutable()->bindTxId[1] = packet[4];
                        for (uint8_t n = 0; n < 5; n++) {
                            rxCc2500SpiConfigMutable()->bindHopData[packet[5] + n] =
                                packet[6 + n];
                        }
 
                        rxCc2500SpiConfigMutable()->rxNum = packet[12];
 
                        return true;
                    }
                }
            }
        }
    }
 
    return false;
}
 
static bool getBind2(uint8_t *packet)
{
    if (bindIdx <= 120) {
        if (cc2500getGdo()) {
            uint8_t ccLen = cc2500ReadReg(CC2500_3B_RXBYTES | CC2500_READ_BURST) & 0x7F;
            if (ccLen) {
                cc2500ReadFifo(packet, ccLen);
                if (packet[ccLen - 1] & 0x80) {
                    if (packet[2] == 0x01) {
                        if ((packet[3] == rxCc2500SpiConfig()->bindTxId[0]) &&
                            (packet[4] == rxCc2500SpiConfig()->bindTxId[1])) {
                            if (packet[5] == bindIdx) {
#if defined(DJTS)
                                if (packet[5] == 0x2D) {
                                    for (uint8_t i = 0; i < 2; i++) {
                                        rxCc2500SpiConfigMutable()->bindHopData[packet[5] + i] = packet[6 + i];
                                    }
                                    listLength = 47;
 
                                    return true;
                                }
#endif
 
                                for (uint8_t n = 0; n < 5; n++) {
                                    if (packet[6 + n] == packet[ccLen - 3] || (packet[6 + n] == 0)) {
                                        if (bindIdx >= 0x2D) {
                                            listLength = packet[5] + n;
 
                                            return true;
                                        }
                                    }
 
                                    rxCc2500SpiConfigMutable()->bindHopData[packet[5] + n] = packet[6 + n];
                                }
 
                                bindIdx = bindIdx + 5;
 
                                return false;
                            }
                        }
                    }
                }
            }
        }
 
        return false;
    } else {
        return true;
    }
}
 
rx_spi_received_e frSkySpiDataReceived(uint8_t *packet)
{
    rx_spi_received_e ret = RX_SPI_RECEIVED_NONE;
 
    switch (protocolState) {
    case STATE_INIT:
        if ((millis() - start_time) > 10) {
            initialise();
 
            protocolState = STATE_BIND;
        }
 
        break;
    case STATE_BIND:
        if (rxSpiCheckBindRequested(true) || rxCc2500SpiConfig()->autoBind) {
            rxSpiLedOn();
            initTuneRx();
 
            protocolState = STATE_BIND_TUNING;
        } else {
            protocolState = STATE_STARTING;
        }
 
        break;
    case STATE_BIND_TUNING:
       if (tuneRx(packet)) {
            initGetBind();
            initialiseData(true);
 
            protocolState = STATE_BIND_BINDING1;
        }
 
        break;
    case STATE_BIND_BINDING1:
        if (getBind1(packet)) {
            protocolState = STATE_BIND_BINDING2;
        }
 
        break;
    case STATE_BIND_BINDING2:
        if (getBind2(packet)) {
            cc2500Strobe(CC2500_SIDLE);
 
            protocolState = STATE_BIND_COMPLETE;
        }
 
        break;
    case STATE_BIND_COMPLETE:
        if (!rxCc2500SpiConfig()->autoBind) {
            writeEEPROM();
        } else {
            uint8_t ctr = 80;
            while (ctr--) {
                rxSpiLedToggle();
                delay(50);
            }
        }
 
        ret = RX_SPI_RECEIVED_BIND;
        protocolState = STATE_STARTING;
 
        break;
    default:
        ret = handlePacket(packet, &protocolState);
 
        break;
    }
 
    return ret;
}
 
rx_spi_received_e frSkySpiProcessFrame(uint8_t *packet)
{
    if (processFrame) {
        return processFrame(packet);
    }
 
    return RX_SPI_RECEIVED_NONE;
}
 
void frSkySpiSetRcData(uint16_t *rcData, const uint8_t *payload)
{
    setRcData(rcData, payload);
}
 
void nextChannel(uint8_t skip)
{
    static uint8_t channr = 0;
 
    channr += skip;
    while (channr >= listLength) {
        channr -= listLength;
    }
    cc2500Strobe(CC2500_SIDLE);
    cc2500WriteReg(CC2500_23_FSCAL3,
                    calData[rxCc2500SpiConfig()->bindHopData[channr]][0]);
    cc2500WriteReg(CC2500_24_FSCAL2,
                    calData[rxCc2500SpiConfig()->bindHopData[channr]][1]);
    cc2500WriteReg(CC2500_25_FSCAL1,
                    calData[rxCc2500SpiConfig()->bindHopData[channr]][2]);
    cc2500WriteReg(CC2500_0A_CHANNR, rxCc2500SpiConfig()->bindHopData[channr]);
    if (spiProtocol == RX_SPI_FRSKY_D) {
        cc2500Strobe(CC2500_SFRX);
    }
}
 
bool frSkySpiInit(const rxSpiConfig_t *rxSpiConfig, rxRuntimeConfig_t *rxRuntimeConfig)
{
    rxSpiCommonIOInit(rxSpiConfig);
    if (!cc2500SpiInit()) {
        return false;
    }
 
    spiProtocol = rxSpiConfig->rx_spi_protocol;
 
    switch (spiProtocol) {
    case RX_SPI_FRSKY_D:
        rxRuntimeConfig->channelCount = RC_CHANNEL_COUNT_FRSKY_D;
 
        handlePacket = frSkyDHandlePacket;
        setRcData = frSkyDSetRcData;
        frSkyDInit();
 
        break;
    case RX_SPI_FRSKY_X:
    case RX_SPI_FRSKY_X_LBT:
        rxRuntimeConfig->channelCount = RC_CHANNEL_COUNT_FRSKY_X;
 
        handlePacket = frSkyXHandlePacket;
#if defined(USE_RX_FRSKY_SPI_TELEMETRY) && defined(USE_TELEMETRY_SMARTPORT)
        processFrame = frSkyXProcessFrame;
#endif
        setRcData = frSkyXSetRcData;
        frSkyXInit(spiProtocol);
 
        break;
    default:
 
        break;
    }
 
#if defined(USE_RX_FRSKY_SPI_TELEMETRY)
    if (rssiSource == RSSI_SOURCE_NONE) {
        rssiSource = RSSI_SOURCE_RX_PROTOCOL;
    }
#endif
 
    missingPackets = 0;
    timeoutUs = 50;
 
    start_time = millis();
    protocolState = STATE_INIT;
 
    return true;
}
#endif