vankxr

// An AP has max 64 words
// Bits 3:2 (the X in 0b????XX00) of the address are sent within the command, i.e. "SWDReadAP 3" = read from 0b????1100
// Bits 7:4 (the X in 0bXXXX??00) of the address are set in the SELECT register, i.e. "SWDWriteDP 2 0x??0000F?" = read from 0b1111??00

// The AHB-AP is on APSEL = 0
// The AAP is on APSEL = 255

// APSEL is the MSB of the SELECT register, i.e. "SWDWriteDP 2 0xFF0000?0" = set APSEL to 255

// Read the AP IDR

vankxr

#!/bin/sh

xtensa-lx106-elf-objcopy -W Cache_Read_Enable_New sdk/lib/libmain.a sdk/lib/libmain2.a
rm sdk/lib/libmain.a
mv sdk/lib/libmain2.a sdk/lib/libmain.a
cp sdk/lib/*.a xtensa-lx106-elf/xtensa-lx106-elf/sysroot/usr/lib/

rm xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/libgcc.a
cp sdk/lib/libgcc.a xtensa-lx106-elf/lib/gcc/xtensa-lx106-elf/4.8.5/

vankxr

#include <stdio.h>
#include <stdint.h>

uint32_t blend(uint32_t base, uint32_t new, float alpha)
{
    uint8_t base_r = (base >> 16) & 0xFF;
    uint8_t base_g = (base >> 8) & 0xFF;
    uint8_t base_b = (base >> 0) & 0xFF;
    
    uint8_t new_r = (new >> 16) & 0xFF;

vankxr

#!/bin/sh

wget http://packs.download.atmel.com/Atmel.SAME70_DFP.2.4.166.atpack
wget http://packs.download.atmel.com/Atmel.SAMS70_DFP.2.4.134.atpack
wget http://packs.download.atmel.com/Atmel.SAMV70_DFP.2.4.130.atpack
wget http://packs.download.atmel.com/Atmel.SAMV71_DFP.2.4.182.atpack
wget https://www.silabs.com/documents/public/cmsis-packs/SiliconLabs.GeckoPlatform_EFM32JG1B_DFP.2.7.0.pack
wget https://www.silabs.com/documents/public/cmsis-packs/SiliconLabs.GeckoPlatform_EFM32PG1B_DFP.2.7.0.pack
wget https://www.silabs.com/documents/public/cmsis-packs/SiliconLabs.GeckoPlatform_EFM32GG11B_DFP.2.7.0.pack
wget https://www.silabs.com/documents/public/cmsis-packs/SiliconLabs.GeckoPlatform_EFM32GG12B_DFP.2.7.0.pack

vankxr

const I2C = require("i2c-bus");

function psu_calc_checksum(addr, buf)
{
    let cs = (addr << 1);

    for(let i = 0; i < buf.length - 1; i++)
        cs += buf.readUInt8(i);

    buf.writeUInt8(((0xFF - cs) + 1) & 0xFF, buf.length - 1);

vankxr

const c = 299792458; // Speed of light
const f = 2400e6; // Hz
const lambda = c / f;
////////
const ref_dish_diameter = 1.2; // meters
const ref_dish_efficiency = 0.5;
const ref_dish_gain_db = 10 * Math.log10(ref_dish_efficiency * Math.pow((Math.PI * ref_dish_diameter) / lambda, 2));
const ref_symbol_rate = 250e3; // symbols per second
const ref_rx_ss = 8 - 8; // dBb (dB w.r.t the beacon) as seen by the tpx (0 dBb = 8 dB MER)
const ref_pwr_w = 30; // watts

vankxr

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>

// gcc -o hx_soc_gpio_pull_cfg hx_soc_gpio_pull_cfg.c
// Usage: hx_soc_gpio_pull_cfg <pin> <OFF|UP|DOWN>

vankxr

const k = Math.log2(16); // bits/symbol
const sr = 192e3; // Symbol rate
const fec = 4/5; // FEC rate
const ff = 64800; // FEC Frame size (16200 or 64800)
const gse = 3/4; // GSE rate
const rof = 0.20; // RRC roll-off factor
const pilots = false; // Pilots enabled
////////
function isclose(a, b, rel_tol=1e-02, abs_tol=0.0)
{

vankxr

int ncpus(void) {
    FILE *cmd = popen("grep '^processor' /proc/cpuinfo | wc -l", "r");

    if (cmd == NULL)
        return -1;

    unsigned nprocs;
    size_t n;
    char buff[8];