Randomness

[d00616]

@mfalkvidd

@mfalkvidd said in Randomness:

@d00616 very nice! I can try on a rpi. What do I need to do to test, besides checking out your branch?

@mfalkvidd Thank you. Checkout and build should be enough.

I have measured the performance with this sketch, but this doesn't work on the Raspberry. By removing the "#define MY_HW_HAS_GETRANDOM", you can switch between old an new mode.

/*
 * The MySensors Arduino library handles the wireless radio link and protocol
 * between your home built sensors/actuators and HA controller of choice.
 * The sensors forms a self healing radio network with optional repeaters. Each
 * repeater and gateway builds a routing tables in EEPROM which keeps track of the
 * network topology allowing messages to be routed to nodes.
 *
 * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
 * Copyright (C) 2013-2015 Sensnology AB
 * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
 *
 * Documentation: http://www.mysensors.org
 * Support Forum: http://forum.mysensors.org
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 *******************************
 */
#include <stdint.h>
#include <pins_arduino.h>
//#define MY_DEBUG
//#define MY_DEBUG_VERBOSE_SIGNING
//#define MY_RADIO_NRF24
//#define MY_RADIO_NRF5_ESB
#define MY_SIGNING_SOFT
//#define MY_SIGNING_ATSHA204
//#define MY_SIGNING_NODE_WHITELISTING {{.nodeId = GATEWAY_ADDRESS,.serial = {0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x02,0x01}}}
#define MY_SIGNING_REQUEST_SIGNATURES
#ifndef MY_SIGNING_SOFT_RANDOMSEED_PIN
#define MY_SIGNING_SOFT_RANDOMSEED_PIN 7
#endif
#ifndef MY_SIGNING_ATSHA204_PIN
#define MY_SIGNING_ATSHA204_PIN 17
#endif
// Enable serial gateway
#define MY_GATEWAY_SERIAL

#include <MySensors.h>

void loop() {
 MyMessage data;
 Serial.print("signerAtsha204SoftGetNonce=");
 unsigned long start = micros();
 signerAtsha204SoftGetNonce(data);
 char *c = (char *)data.getCustom();
 Serial.println(micros()-start);

  delay(1000);
}

[mfalkvidd]

@d00616 Sorry, seems like I am in over my head here.

Do I need to run configure? If so, with which parameters? Then, do I run make? I tried this:

pi@raspberrypi ~/d00616/MySensors $ ./configure --my-gateway=ethernet --my-transport=nrf24 --my-rf24-irq-pin=15 --my-rf24-channel=119
[SECTION] Detecting target machine.
  [OK] machine detected: SoC=BCM2836, Type=rpi2, CPU=armv7l.
[SECTION] Detecting SPI driver.
  [OK] SPI driver detected:BCM.
[SECTION] Detecting init system.
  [OK] init system detected: sysvinit.
[SECTION] Saving configuration.
[SECTION] Cleaning previous builds.
[OK] Finished.
pi@raspberrypi ~/d00616/MySensors $ make
gcc -MT build/drivers/Linux/log.o -MMD -MP -march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -DMY_RADIO_NRF24 -DMY_GATEWAY_LINUX -DMY_DEBUG -DLINUX_SPI_BCM -DLINUX_ARCH_RASPBERRYPI -DRPI_TYPE=\"rpi2\" -DMY_RF24_CHANNEL=119 -DMY_RX_MESSAGE_BUFFER_FEATURE -DMY_RF24_IRQ_PIN=15  -Ofast -g -Wall -Wextra  -I. -I./core -I./drivers/Linux -I./drivers/BCM -c drivers/Linux/log.c -o build/drivers/Linux/log.o
g++ -MT build/drivers/Linux/IPAddress.o -MMD -MP -march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -DMY_RADIO_NRF24 -DMY_GATEWAY_LINUX -DMY_DEBUG -DLINUX_SPI_BCM -DLINUX_ARCH_RASPBERRYPI -DRPI_TYPE=\"rpi2\" -DMY_RF24_CHANNEL=119 -DMY_RX_MESSAGE_BUFFER_FEATURE -DMY_RF24_IRQ_PIN=15  -Ofast -g -Wall -Wextra  -I. -I./core -I./drivers/Linux -I./drivers/BCM -c drivers/Linux/IPAddress.cpp -o build/drivers/Linux/IPAddress.o
cc1plus: error: bad value (cortex-a7) for -mtune switch
Makefile:98: recipe for target 'build/drivers/Linux/IPAddress.o' failed
make: *** [build/drivers/Linux/IPAddress.o] Error 1

Or do I just compile the sketch? If so, how do I do that?

[d00616]

@mfalkvidd It requires the option "--my-signing=software --my-signing-request-signatures". But i don't know if it is all.

[mfalkvidd]

Sorry @d00616, seems like compiling is too hard for me. I am not able to get past the IPAddress.o error. I get the same problem when compiling against vanilla MySensors master so it's not your fault ;-)

[d00616]

@mfalkvidd said in Randomness:

Sorry @d00616, seems like compiling is too hard for me. I am not able to get past the IPAddress.o error. I get the same problem when compiling against vanilla MySensors master so it's not your fault ;-)

Thank you.

[mfalkvidd]

@d00616 I got a bit further by upgrading from gcc 4.6 to gcc 4.7 (and same for g++). Instructions here: http://helloraspberrypi.blogspot.se/2014/06/install-gcc-47-on-raspberry-pi-and-set.html

Now I can compile MySensors master, but not MySensors development. I'll create a separate thread for this.

[mfalkvidd]

@d00616 your branch compiles with the following settings on Raspberry Pi, if I revert 4c31e2 (see the other thread)

./configure --my-transport=nrf24 --my-gateway=serial --my-serial-is-pty --my-serial-pty=/dev/ttyMySensors2Gateway --spi-driver=BCM --my-signing=software --my-signing-request-signatures

I don't have any signing nodes and I don't know how to run the test sketch though.

[d00616]

@mfalkvidd said in Randomness:

./configure --my-transport=nrf24 --my-gateway=serial --my-serial-is-pty --my-serial-pty=/dev/ttyMySensors2Gateway --spi-driver=BCM --my-signing=software --my-signing-request-signatures

Thank you.

[d00616]

@mfalkvidd With "./configure --my-transport=nrf24 --my-gateway=serial --my-serial-is-pty --my-serial-pty=/dev/ttyMySensors2Gateway --spi-driver=SPIDEV --my-signing=software --my-signing-request-signatures" I can compile on my x86 machine.

Now, I can write some code to check the generated random data.

[d00616]

I have checked the hwGetentropy() on my x86 Linux. When https://github.com/mysensors/MySensors/pull/830 is merged, I create a new Pull Request.