whoim2 commented 3 years ago

Hello, what i may generate 16ch pxx use pxx lib?

PumaFPV commented 3 years ago

Hello, do you want to talk to a R9m module? I've made my own code with the help of this lib and a pdf explaning how pxx works. I'm using an ESP32 so it is a little different. But i finally got something working using the same structre as this lib

whoim2 commented 3 years ago

Hello, do you want to talk to a R9m module? I've made my own code with the help of this lib and a pdf explaning how pxx works. I'm using an ESP32 so it is a little different. But i finally got something working using the same structre as this lib

Hello! No, i want talk to qczek lrs (qlrs) with 16ch from arduino 32u4, custom radio. If you send me simple code, im try to use it :) whoim@mail.ru

PumaFPV commented 3 years ago

`/*

This code is based on the work of MichaelCWarren, see original content on his github page R9M PXX/PCM is based on 20 bytes of data organised in the following structure:

1 - Head - 0111 1110 - 0x7E 2 - Rx nbr - 0000 0000 - 0x00 3 - Bind/Range - 0000 0000 - 0x00 / 0x05 Bind / 0x20 Range 4 - Flag2 - 0000 0000 5 - chan1 - 6 - Chan2/1 - 7 - Chan2 - 8 - Chan3 - 9 - Chan4/3 - 10- Chan4 - 11- Chan5 - 12- Chan6/5 - 13- Chan6 - 14- Chan7 - 15- Chan8/7 - 16- Chan8 - 17- Pwr EU/US - 0100 1000 - 0x48 EU 100mw 18- CRC - 19- CRC - 20- Tail - 0111 1110 - 0x7E

Infos for each packets: Bind/Range: 0000 0101 bind | 0010 0000 range Pwr/zone: EU 868: 0100 0000 10mw | 0100 1000 100mw | 0101 0000 500mw | 0101 1000 1W || US 915: 0000 0000 10mw | 0000 1000 100mw | 0001 0000 500mw | 0001 1000 1W CRC: CRC16 0x1189 Failsafe: Not found yet

*/

include <rom/crc.h>

define PXX_CHANNEL_WIDTH 2048

define PXX_UPPER_LOW 2049

define PXX_UPPER_HIGH 4094

define PXX_LOWER_LOW 1

define PXX_LOWER_HIGH 2046

define HEAD 0x7E //0x7C

define BIND 0x05

define RANGE 0x20

define EU_100_mw 0x48 // 0100 1000

define EU_10_mw 0x40 // 0100 0000

//-----Default values byte receiver_number = 0x00; byte power_zone = EU_10_mw; byte flag1 = 0x00; byte CRC_1 = 0x00; byte CRC_2 = 0x00;

byte byte1, byte2, byte3, byte4, byte5, byte6, byte7, byte8, byte9, byte10, byte11, byte12 = 0;

bool pulses[64]; int length = 0;

bool send_upper_channel;

int pcm_ones_count = 0;

int pcm_crc;

unsigned long interval_pxx = 9; unsigned long previous_millis_pxx = 0;

unsigned long interval_mlx = 5; unsigned long previous_millis_mlx = 0;

const uint16_t CRC_Short[] = { 0x0000, 0x1189, 0x2312, 0x329B, 0x4624, 0x57AD, 0x6536, 0x74BF, 0x8C48, 0x9DC1, 0xAF5A, 0xBED3, 0xCA6C, 0xDBE5, 0xE97E, 0xF8F7 };

uint16_t CRCTable(uint8_t val) { return CRC_Short[val&0x0F] ^ (0x1081 * (val>>4)); }

void crc( uint8_t data ) { pcm_crc = (pcm_crc<<8) ^ CRCTable((pcm_crc>>8)^data); }

void serial_bit(bool bit) { if(bit) { GPIO.out_w1ts = ((uint32_t)1 << 17); //gpio_sett_level(pin, state); delayMicroseconds(7); } else { GPIO.out_w1tc = ((uint32_t)1 << 17); delayMicroseconds(7);
} }

void put_pcm_part(bool bit) {

serial_bit(0);

if(bit) { serial_bit(0); }

serial_bit(1);

}

void put_pcm_bit(bool bit) { if(pcm_ones_count >= 5) { put_pcm_part(0); } if(bit) { pcm_ones_count++; put_pcm_part(1); } else { pcm_ones_count = 0; put_pcm_part(0); }

}

void put_pcm_byte(uint8_t byte) { crc(byte);

for(uint8_t i = 0; i < 8; i++) { put_pcm_bit(byte & 0x80); byte <<= 1;
} }

void put_pcm_head() { // send 7E, do not CRC // 01111110 put_pcm_part(0); put_pcm_part(1); put_pcm_part(1); put_pcm_part(1); put_pcm_part(1); put_pcm_part(1); put_pcm_part(1); put_pcm_part(0); }

uint16_t limit(uint16_t low, uint16_t val, uint16_t high) { if(val < low) { return low; }

if(val > high)
{
    return high;
}

return val;

}

void prepare_pxx(int16_t channels[16], byte rx_number, byte bind, byte power_zone) { uint16_t chan=0, chan_low=0;

length = 0;
pcm_crc = 0;
pcm_ones_count = 0;

/* preamble */
//putPcmPart(0);
//putPcmPart(0);
//putPcmPart(0);
//putPcmPart(0);

/* Sync */
put_pcm_part(0);
put_pcm_head();

// Rx Number
put_pcm_byte(rx_number);

// FLAG1 - Fail Safe Mode, nothing currently set, maybe want to do this
put_pcm_byte(0x00);

// FLAG2
put_pcm_byte(0x00);

if(send_upper_channel)
{
  put_pcm_byte(channels[0] & 0xFF);
  put_pcm_byte((channels[0] >> 8) | ((0x0F & channels[1]) << 4));
  put_pcm_byte(channels[1] >> 4);
  put_pcm_byte(channels[2] & 0xFF);
  put_pcm_byte((channels[2] >> 8) | ((0x0F & channels[3]) << 4));
  put_pcm_byte(channels[3] >> 4);
  put_pcm_byte(channels[4] & 0xFF);
  put_pcm_byte((channels[4] >> 8) | ((0x0F & channels[5]) << 4));
  put_pcm_byte(channels[5] >> 4);
  put_pcm_byte(channels[6] & 0xFF);
  put_pcm_byte((channels[6] >> 8) | ((0x0F & channels[7]) << 4));
  put_pcm_byte(channels[7] >> 4);
}
else
{
  put_pcm_byte((channels[8] + 2048) & 0xFF);
  put_pcm_byte(((channels[8] + 2048) >> 8) | ((0x0F & (channels[9] + 2048)) << 4));
  put_pcm_byte((channels[9] + 2048) >> 4);
  put_pcm_byte((channels[10] + 2048) & 0xFF);
  put_pcm_byte(((channels[10] + 2048) >> 8) | ((0x0F & (channels[11] + 2048)) << 4));
  put_pcm_byte((channels[11] + 2048) >> 4);
  put_pcm_byte((channels[12] + 2048) & 0xFF);
  put_pcm_byte(((channels[12] + 2048) >> 8) | ((0x0F & (channels[13]+ 2048)) << 4));
  put_pcm_byte((channels[13] + 2048) >> 4);
  put_pcm_byte((channels[14] + 2048) & 0xFF);
  put_pcm_byte(((channels[14] + 2048) >> 8) | ((0x0F & (channels[15] + 2048)) << 4));
  put_pcm_byte((channels[15] + 2048) >> 4);      
}

put_pcm_byte(power_zone); //10mw EU

// CRC16
chan = pcm_crc;
put_pcm_byte(chan>>8);
put_pcm_byte(chan);

// Sync
put_pcm_head();
GPIO.out_w1tc = ((uint32_t)1 << 17);
send_upper_channel = !send_upper_channel;

}`

PumaFPV commented 3 years ago

not perfect yet but it is working GPIO.out_w1tc = ((uint32_t)1 <<17); = digitalWrite(17, LOW); GPIO.out_w1ts = ((uint32_t)1 <<17); = digitalWrite(17, HIGH)

bzucak commented 2 years ago

Hello, do you want to talk to a R9m module? I've made my own code with the help of this lib and a pdf explaning how pxx works. I'm using an ESP32 so it is a little different. But i finally got something working using the same structre as this lib

Hello I'd like to use this code for comunication between arduino and R9M lite Pro module, I tried to use original Michaels code, but I dont know how to set the module and receiver to make it work. my steps was as follows:

Registration and binding The module with Receiver via taranis radio
setting the RX ID of the receiver same as Rx Number in code
Which worked very well with Radio controller
Only think i changed in code was to send on the channel1 sinewave in range 1000 to 2000us instead the CPPM decoding. other chanells set to 1000

After that I Connect Power and Tx output of Arduino on the PXX_out, but it seems it doesnot work. Module is powered, communication is running but receiver doesnot received any data.

Any hint what might be wrong or what to be done diferently?

You are also mentioned Bind/Range setup within packet. is it posible to bind receiver with arduino without RC Controller? how its worked?

thank you Bzucak

MichaelCWarren / PPMtoPXXArduino

pxx 16ch #1

include <rom/crc.h>

define PXX_CHANNEL_WIDTH 2048

define PXX_UPPER_LOW 2049

define PXX_UPPER_HIGH 4094

define PXX_LOWER_LOW 1

define PXX_LOWER_HIGH 2046

define HEAD 0x7E //0x7C

define BIND 0x05

define RANGE 0x20

define EU_100_mw 0x48 // 0100 1000

define EU_10_mw 0x40 // 0100 0000