Raspberry Pi Forums

lilzz

.extern __bss_start
.extern __bss_end

ldr r0, =__bss_start
ldr r1, =__bss_end

what are the actual values of _bss_start and _bss_end?
They are not given specific values in startup.s file

lilzz

stevech wrote:Makes no sense because RPi is intrinsically Linux based and the I/O drivers are for Linux.

What the heck you talking about?

intrinsicaly LINUX?? LOL,

I/O drivers are for Linux?? Again LOL.

lilzz

https://github.com/jameswalmsley/RaspberryPi-FreeRTOS What's tools and process that generate the .ld , .mk files? How does it generate the linker file to link startup.S with application program? How does it generate the linker file to link FreeRTOS files with Pi Drivers files? any tutorial outthere ...

lilzz

% getconf -a | grep ^POSIX2_VERSION
POSIX2_VERSION 200809

So i decide to change it.

% setenv POSIX2_VERSION 199209

but I check again, getconf -a | grep ^POSIX2_VERSION

still shows POSIX2_VERSION 200809

why I cannot change that?

lilzz

I have a device interface with Pi.

It said its RF output power is 20dBm and 100mW.

what does it mean 20 dBm?

lilzz

it doesn't have symbolic solution or an equation.
Instead just plotting some numbers.

What can I learn from some plotting of graph?

Why people Octave is good for math?

Btw I am taking some math classed in college.

lilzz

I runs into a problem with one open sourced lipsolver but it couldn't handle it
so I try Garobi which is 2/3x faster it able to free up 2000 variables but it's a proprietary library.

anyone knows a really fast open source Lipsolver outhere?

lilzz

I like search for all email address that contains XXX@XXXX.edu The XXX can be any number of XXXs.
Can I do that with google search?

If Not, How should write something in Python/PHP to search the entire internet for a list of email addresses?

lilzz

struct Object
{
string objstring;

}

void Object::funct (...)
{

this->objstring=" this is a test";
}

Can I treat the structure like a class?

lilzz

invalid syntax.

Make no sense at all.

lilzz

example_db.append("object1", "object2")

print example_db

this cause an error.

why?

lilzz

I would like to dump the content inside the object tmp_np which is a UllmanSet which if you know a key then you know the position and if you know the position , you know the key. Is there a standard C++ container that's similar to the Ullmanset. Ullmanset 's index starts at 0 and Ullmanset1's index ...

lilzz

std::map<int, std::map<std::string, std::pair<int, std::string>>>mfvs;
I want to output the std::string the first part of inner map.

for (const auto& iter :mfvs)
{
std::cout << iter.second.first << "\n";
}
this gives me an error

lilzz

class1 has a member m_name Since std:vector <class1*> Myclass is a vector of pointer to a class, Myclass =the element of the vector, which is a pointer a class1 Myclass ->m_name =gets the N_name of class1. I trying output the m_name for ( int i = 0; i < Myclass.size(); i++) { std::cout << (Myclass )...

lilzz

@paeryn if std::set < class1, class 2> both class 1, class 2 has m_name, m_value for (const auto& iter : used) { iter.m_name //class2 or class2 m_name? iter.m_value //class1 or class 2 m_value? } your example is not clear

lilzz

ok, my mistake.
the above is for std::set instead of std::map

I need a way to output for std::set.

lilzz

It doesn't present class functions or class variable when I do iter.first.
iter.first error :request for member first in iter, which is of pointer type class1 * const (maybe you meant to use -> ?

Iter->first error: class class1 has no member named first

So it doesn't work.

lilzz

what if the std::map<object1, object2> used = {{obj1, obj2} {obj3, obj4}}; for (const auto& iter : used) { std::cout << "object1 name: " <<(iter.first.m_name) << "object2 name: " << iter.second.m_name << "\n"; } That doesn't seem to work. iter.first. there is auto fill in element in my ide.

lilzz

std::map<uint8_t, int> inst_used; for (uint8_t gc : main_classes) { extend( inst_used, 0); std::cout << inst_used; } The code crashed when I did std:cout to show the values of inst_used. std::map what's the best way to display the entire values of inst_used. I try to debug and single-step it but th...

lilzz

The code actually like this ibs >> device >> width >> height >> n_nets >> packages >> loc_pin_glb_num >> iolatch >> ieren >> extra_bits >> gbufin >> tile_colbuf_tile >> tile_type >> net_names >> tile_nets_idx >> tile_nonrouting_cbits >> extra_cell_tile >> extra_cell_type >> extra_cell_mfvs >> n_cell...

lilzz

nothing special about the ibstream . I don't see how it knows how to parse the data. class ibstream { private: std::istream &is; public: ibstream(std::istream &is_) : is(is_) {} void read(char *p, size_t n) { is.read(p, n); size_t rn = is.gcount(); if (is.bad() || rn != n) fatal(fmt("std::istream::r...

lilzz

std::string device; int width; int height; int n_tiles; int n_nets; int n_global_nets; std::map<int, int> net_global; std::map<std::string, Package> packages; std::map<Location, int> loc_pin_glb_num; ibstream &ibs ibs >> device >> width >> height >> n_nets >> packages >> loc_pin_glb_num There's dat...

lilzz

OK, I solved by using std::cout instead

lilzz

for (int i = 0; i < n_tiles; ++i) { for (const auto &p : tile_nets_idx[i]) { extend(tile_nets[i], net_names[p.first], p.second); } } Original code is as above. It runs fine. And I like to find out the values for p.first, p.second, net_names[p.first] so I modify the code as followed for (int i = 0; ...

lilzz

#include "vector.hh" #include <cstddef> #include <cassert> template<unsigned B> class BasedUllmanSet { size_t n; std::vector<int> key; BasedVector<unsigned, B> pos; public: BasedUllmanSet() : n(0) {} BasedUllmanSet(size_t cap) : n(0), key(cap), pos(cap) {} size_t capacity() const { return key.size(...

Search found 411 matches

startup.s file _bss_start and _bss_end

Re: What's tools and process to port Pi to FreeRTOS

What's tools and process to port Pi to FreeRTOS

why I can't change my POSIX2_VERSION?

RF interface device Output power

I am using Octave for math but it doesn't have symbolic

Searching for a really fast Open source Lipsolver

Can I do regular expression search with google?

Is it OK use "this" for Structure

Re: printing a database error

printing a database error

Dumping the contents inside the following objects.

output for nested std::map

Trying to output std::Vector <Class1*> MyClass

Re: How to output values of std::map

Re: How to output values of std::map

Re: How to output values of std::map

Re: How to output values of std::map

How to output values of std::map

Re: Parsing automatically??

Re: Parsing automatically??

Parsing automatically??

Re: segmentation fault when debugging

segmentation fault when debugging

what's this Ullmanset Class?