mirror
/
fm_transmitter
kopia lustrzana https://github.com/markondej/fm_transmitter
1
0
Forkuj 0
Kod Zgłoszenia Projekty Wydania Wiki Aktywność

Aarch64 support added

pull/138/head
Marcin Kondej 2021-03-15 04:26:08 +01:00
rodzic b20f4dd85d
commit c54fc2fcca
10 zmienionych plików z 42 dodań i 33 usunięć
Pokaż statystyki Ściągnij plik aktualizacji Ściągnij plik porównania Expand all files Collapse all files

15
README.md
Wyświetl plik

@ -4,13 +4,22 @@ Use the Raspberry Pi as an FM transmitter. Works on every Raspberry Pi board.
Just get an FM receiver, connect a 20 - 40 cm plain wire to the Raspberry Pi's GPIO4 (PIN 7 on GPIO header) to act as an antenna, and you are ready for broadcasting.
This project uses the general clock output to produce frequency modulated radio communication. It is based on an idea originally presented by [Oliver Mattos and Oskar Weigl](http://icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter) at [PiFM project](http://icrobotics.co.uk/wiki/index.php/Turning_the_Raspberry_Pi_Into_an_FM_Transmitter).
## How to use it
To use this project you will have to build the executable. First, clone this repository, then use `make` command as shown below:
## Installation and usage
To use this software you will have to build the executable. First, install required dependencies:
```
sudo apt-get update
sudo apt-get install make build-essential
```
Depending on OS (eg. Ubuntu Server 20.10) installing Broadcom libraries may be also required:
```
sudo apt-get install libraspberrypi-dev
```
After installing dependencies clone this repository and use `make` command in order to build executable:
```
git clone https://github.com/markondej/fm_transmitter
cd fm_transmitter
make
```
```
After a successful build you can start transmitting by executing the "fm_transmitter" program:
```
sudo ./fm_transmitter -f 102.0 acoustic_guitar_duet.wav

2
main.cpp → fm_transmitter.cpp
Wyświetl plik

@ -1,7 +1,7 @@
/*
FM Transmitter - use Raspberry Pi as FM transmitter
Copyright (c) 2020, Marcin Kondej
Copyright (c) 2021, Marcin Kondej
All rights reserved.
See https://github.com/markondej/fm_transmitter

2
mailbox.c
Wyświetl plik

@ -90,7 +90,7 @@ static int mbox_property(int file_desc, void *buf)
int ret_val = ioctl(file_desc, IOCTL_MBOX_PROPERTY, buf);
if (ret_val < 0) {
printf("ioctl_set_msg failed:%d\n", ret_val);
printf("ioctl_set_msg failed: %d\n", ret_val);
}
#ifdef DEBUG

10
makefile
Wyświetl plik

@ -1,13 +1,13 @@
EXECUTABLE = fm_transmitter
VERSION = 0.9.4
VERSION = 0.9.5
FLAGS = -Wall -O3 -std=c++11
TRANSMITTER = -fno-strict-aliasing -I/opt/vc/include
ifeq ($(GPIO21), 1)
TRANSMITTER += -DGPIO21
endif
all: main.o mailbox.o sample.o wave_reader.o transmitter.o
g++ -L/opt/vc/lib -o $(EXECUTABLE) main.o mailbox.o sample.o wave_reader.o transmitter.o -lm -lpthread -lbcm_host
all: fm_transmitter.o mailbox.o sample.o wave_reader.o transmitter.o
g++ -L/opt/vc/lib -o $(EXECUTABLE) fm_transmitter.o mailbox.o sample.o wave_reader.o transmitter.o -lm -lpthread -lbcm_host
mailbox.o: mailbox.c mailbox.h
g++ $(FLAGS) -c mailbox.c
@ -21,8 +21,8 @@ wave_reader.o: wave_reader.cpp wave_reader.hpp
transmitter.o: transmitter.cpp transmitter.hpp
g++ $(FLAGS) $(TRANSMITTER) -c transmitter.cpp
main.o: main.cpp
g++ $(FLAGS) -DVERSION=\"$(VERSION)\" -DEXECUTABLE=\"$(EXECUTABLE)\" -c main.cpp
fm_transmitter.o: fm_transmitter.cpp
g++ $(FLAGS) -DVERSION=\"$(VERSION)\" -DEXECUTABLE=\"$(EXECUTABLE)\" -c fm_transmitter.cpp
clean:
rm *.o

2
sample.cpp
Wyświetl plik

@ -1,7 +1,7 @@
/*
FM Transmitter - use Raspberry Pi as FM transmitter
Copyright (c) 2020, Marcin Kondej
Copyright (c) 2021, Marcin Kondej
All rights reserved.
See https://github.com/markondej/fm_transmitter

2
sample.hpp
Wyświetl plik

@ -1,7 +1,7 @@
/*
FM Transmitter - use Raspberry Pi as FM transmitter
Copyright (c) 2020, Marcin Kondej
Copyright (c) 2021, Marcin Kondej
All rights reserved.
See https://github.com/markondej/fm_transmitter

36
transmitter.cpp
Wyświetl plik

@ -1,7 +1,7 @@
/*
FM Transmitter - use Raspberry Pi as FM transmitter
Copyright (c) 2020, Marcin Kondej
Copyright (c) 2021, Marcin Kondej
All rights reserved.
See https://github.com/markondej/fm_transmitter
@ -127,13 +127,13 @@ class Peripherals
static Peripherals instance;
return instance;
}
inline uint32_t GetPhysicalAddress(volatile void *object) const {
return PERIPHERALS_PHYS_BASE + (reinterpret_cast<uint32_t>(object) - reinterpret_cast<uint32_t>(peripherals));
inline uintptr_t GetPhysicalAddress(volatile void *object) const {
return PERIPHERALS_PHYS_BASE + (reinterpret_cast<uintptr_t>(object) - reinterpret_cast<uintptr_t>(peripherals));
}
inline uint32_t GetVirtualAddress(uint32_t offset) const {
return reinterpret_cast<uint32_t>(peripherals) + offset;
inline uintptr_t GetVirtualAddress(uintptr_t offset) const {
return reinterpret_cast<uintptr_t>(peripherals) + offset;
}
inline static uint32_t GetVirtualBaseAddress() {
inline static uintptr_t GetVirtualBaseAddress() {
return (bcm_host_get_peripheral_size() == BCM2838_PERI_VIRT_BASE) ? BCM2838_PERI_VIRT_BASE : bcm_host_get_peripheral_address();
}
inline static float GetClockFrequency() {
@ -191,15 +191,15 @@ class AllocatedMemory
AllocatedMemory(const AllocatedMemory &) = delete;
AllocatedMemory(AllocatedMemory &&) = delete;
AllocatedMemory &operator=(const AllocatedMemory &) = delete;
inline uint32_t GetPhysicalAddress(volatile void *object) const {
return (memSize) ? memAddress + (reinterpret_cast<uint32_t>(object) - reinterpret_cast<uint32_t>(memAllocated)) : 0x00000000;
inline uintptr_t GetPhysicalAddress(volatile void *object) const {
return (memSize) ? memAddress + (reinterpret_cast<uintptr_t>(object) - reinterpret_cast<uintptr_t>(memAllocated)) : 0x00000000;
}
inline uint32_t GetAddress() const {
return reinterpret_cast<uint32_t>(memAllocated);
inline uintptr_t GetBaseAddress() const {
return reinterpret_cast<uintptr_t>(memAllocated);
}
private:
unsigned memSize, memHandle;
uint32_t memAddress;
uintptr_t memAddress;
void *memAllocated;
int mBoxFd;
};
@ -220,7 +220,7 @@ class Device
class ClockDevice : public Device
{
public:
ClockDevice(uint32_t clockAddress, unsigned divisor) {
ClockDevice(uintptr_t clockAddress, unsigned divisor) {
clock = reinterpret_cast<ClockRegisters *>(peripherals->GetVirtualAddress(clockAddress));
clock->ctl = (0x5a << 24) | 0x06;
std::this_thread::sleep_for(std::chrono::microseconds(1000));
@ -382,7 +382,7 @@ void Transmitter::TransmitViaCpu(WaveReader &reader, ClockOutput &output, unsign
std::this_thread::sleep_for(std::chrono::microseconds(BUFFER_TIME / 2));
auto finally = [&]() {
stopped = true;
stopped = true;
transmitterThread.join();
samples.clear();
};
@ -416,7 +416,7 @@ void Transmitter::TransmitViaDma(WaveReader &reader, ClockOutput &output, unsign
throw std::runtime_error("DMA channel number out of range (0 - 15)");
}
AllocatedMemory allocated(sizeof(uint32_t) * (bufferSize) + sizeof(DMAControllBlock) * (2 * bufferSize) + sizeof(uint32_t));
AllocatedMemory allocated(sizeof(uint32_t) * bufferSize + sizeof(DMAControllBlock) * (2 * bufferSize) + sizeof(uint32_t));
std::vector<Sample> samples = reader.GetSamples(bufferSize, stopped);
if (samples.empty()) {
@ -434,12 +434,12 @@ void Transmitter::TransmitViaDma(WaveReader &reader, ClockOutput &output, unsign
unsigned i, cbOffset = 0;
volatile DMAControllBlock *dmaCb = reinterpret_cast<DMAControllBlock *>(allocated.GetAddress());
volatile uint32_t *clkDiv = reinterpret_cast<uint32_t *>(reinterpret_cast<uint32_t>(dmaCb) + 2 * sizeof(DMAControllBlock) * bufferSize);
volatile uint32_t *pwmFifoData = reinterpret_cast<uint32_t *>(reinterpret_cast<uint32_t>(clkDiv) + sizeof(uint32_t) * bufferSize);
volatile DMAControllBlock *dmaCb = reinterpret_cast<DMAControllBlock *>(allocated.GetBaseAddress());
volatile uint32_t *clkDiv = reinterpret_cast<uint32_t *>(reinterpret_cast<uintptr_t>(dmaCb) + 2 * sizeof(DMAControllBlock) * bufferSize);
volatile uint32_t *pwmFifoData = reinterpret_cast<uint32_t *>(reinterpret_cast<uintptr_t>(clkDiv) + sizeof(uint32_t) * bufferSize);
for (i = 0; i < bufferSize; i++) {
float value = samples[i].GetMonoValue();
clkDiv[i] = (0x5a << 24) | (0xffffff & (clockDivisor - static_cast<int>(round(value * divisorRange))));
clkDiv[i] = (0x5a << 24) | (0xffffff & (clockDivisor - static_cast<int32_t>(round(value * divisorRange))));
dmaCb[cbOffset].transferInfo = (0x01 << 26) | (0x01 << 3);
dmaCb[cbOffset].srcAddress = allocated.GetPhysicalAddress(&clkDiv[i]);
dmaCb[cbOffset].dstAddress = peripherals.GetPhysicalAddress(&output.GetDivisor());

2
transmitter.hpp
Wyświetl plik

@ -1,7 +1,7 @@
/*
FM Transmitter - use Raspberry Pi as FM transmitter
Copyright (c) 2020, Marcin Kondej
Copyright (c) 2021, Marcin Kondej
All rights reserved.
See https://github.com/markondej/fm_transmitter

2
wave_reader.cpp
Wyświetl plik

@ -1,7 +1,7 @@
/*
FM Transmitter - use Raspberry Pi as FM transmitter
Copyright (c) 2020, Marcin Kondej
Copyright (c) 2021, Marcin Kondej
All rights reserved.
See https://github.com/markondej/fm_transmitter

2
wave_reader.hpp
Wyświetl plik

@ -1,7 +1,7 @@
/*
FM Transmitter - use Raspberry Pi as FM transmitter
Copyright (c) 2020, Marcin Kondej
Copyright (c) 2021, Marcin Kondej
All rights reserved.
See https://github.com/markondej/fm_transmitter