Add string based constructor for Buzzer and an example to initialize it

Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
This commit is contained in:
mihais 2018-03-29 18:03:59 +03:00 committed by Mihai Tudor Panu
parent 58ee51c767
commit 32b73a1d25
6 changed files with 65 additions and 78 deletions

View File

@ -7,6 +7,6 @@
int
main(int argc, char** argv)
{
upm::Buzzer buzzer("p:33,vol:1.0");
upm::Buzzer buzzer("p:32,vol:0.01,play:3800:500000");
return 0;
}

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@ -35,7 +35,7 @@ main(int argc, char** argv)
int chord[] = { BUZZER_DO, BUZZER_RE, BUZZER_MI, BUZZER_FA, BUZZER_SOL, BUZZER_LA, BUZZER_SI };
// create Buzzer instance
upm::Buzzer sound(5);
upm::Buzzer sound(32);
// print sensor name
std::cout << sound.name() << std::endl;

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@ -63,7 +63,7 @@ buzzer_context buzzer_init(int pin)
mraa_pwm_enable(dev->pwm, 1);
buzzer_set_volume(dev, 1.0);
buzzer_set_volume(dev, 0.01);
dev->initialized = true;
return dev;

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@ -30,7 +30,6 @@
#include <string>
#include <iostream>
#include "mraa/initio.hpp"
#include "upm_string_parser.hpp"
#include <upm_utilities.h>
#include "buzzer.hpp"
@ -46,73 +45,95 @@ Buzzer::Buzzer(int pinNumber) : m_buzzer(buzzer_init(pinNumber))
": buzzer_init() failed");
}
Buzzer::Buzzer(std::string initStr)
Buzzer::Buzzer(std::string initStr) : mraaIo(initStr)
{
mraa::MraaIo mraaIo(initStr);
mraa_io_descriptor* descs = mraaIo.getMraaDescriptors();
std::vector<std::string> upmTokens;
if (mraaIo.getLeftoverStr() != "") {
upmTokens = UpmStringParser::parse(mraaIo.getLeftoverStr());
upmTokens = UpmStringParser::parse(mraaIo.getLeftoverStr());
}
m_buzzer = nullptr;
if (!mraaIo.pwms.empty()) {
m_buzzer = mraaIo.pwms[0];
m_buzzer = (buzzer_context)malloc(sizeof(struct _buzzer_context));
if (!m_buzzer)
throw std::runtime_error(std::string(__FUNCTION__) +
": buzzer_init() failed");
m_buzzer->pwm = NULL;
m_buzzer->volume = 0.0;
m_buzzer->initialized = false;
// make sure MRAA is initialized
int mraa_rv;
if ((mraa_rv = mraa_init()) != MRAA_SUCCESS)
{
buzzer_close(m_buzzer);
throw std::runtime_error(std::string(__FUNCTION__) +
": mraa_init() failed");
}
if (m_buzzer == nullptr) {
throw std::runtime_error(std::string(__FUNCTION__) +
": null buzzer context");
if(!descs->pwms)
{
buzzer_close(m_buzzer);
throw std::runtime_error(std::string(__FUNCTION__) +
": mraa_pwm_init() failed");
}
else
{
if( !(m_buzzer->pwm = descs->pwms[0]) )
{
buzzer_close(m_buzzer);
throw std::runtime_error(std::string(__FUNCTION__) +
": mraa_pwm_init() failed");
}
}
mraa_pwm_enable(m_buzzer->pwm, 1);
volume = 1.0;
m_buzzer.enable(true);
/*
for (std::string tok : upmTokens) {
if (tok.substr(0, 4) == "vol:") {
// setVolume(::atof(tok.substr(4));
} else {}
}*/
if(tok.substr(0, 4) == "vol:") {
float vol = std::stof(tok.substr(4));
setVolume(vol);
}
if(tok.substr(0, 5) == "play:") {
std::string::size_type sz;
int note = std::stoi(tok.substr(5), &sz);
tok = tok.substr(5);
int delay = std::stoi(tok.substr(sz+1));
playSound(note, delay);
}
}
m_buzzer->initialized = true;
}
Buzzer::~Buzzer()
{
stopSound();
m_buzzer.enable(false);
buzzer_close(m_buzzer);
}
void Buzzer::setVolume(float vol)
{
volume = vol;
buzzer_set_volume(m_buzzer, vol);
}
float Buzzer::getVolume()
{
return volume;
return buzzer_get_volume(m_buzzer);
}
int Buzzer::playSound(int note, int delay)
{
if (m_buzzer.period_us(note) != MRAA_SUCCESS) {
cout << "period() error\n";
}
if (m_buzzer.write(volume * 0.5)) {
cout << "write() error\n";
}
if (delay >= 0) {
upm_delay_us(delay);
stopSound();
}
if (buzzer_play_sound(m_buzzer, note, delay))
throw std::runtime_error(std::string(__FUNCTION__) +
": buzzer_play_sound() failed");
return note;
}
void Buzzer::stopSound()
{
m_buzzer.period_us(1);
m_buzzer.write(0);
if (buzzer_stop_sound(m_buzzer))
throw std::runtime_error(std::string(__FUNCTION__) +
": buzzer_stop_sound() failed");
}

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@ -111,38 +111,6 @@ extern "C" {
*/
float buzzer_get_volume(const buzzer_context dev);
char** upm_parse_init_str(const char* str, const char* delims, int *num_tokens)
{
char *saveptr, *tok, *s, *p_str;
char **output = NULL;
size_t output_size = 0;
p_str = strdup(str);
for (s = p_str; ; s = NULL) {
tok = strtok_r(s, delims, &saveptr);
if (tok == NULL)
break;
output = (char**)realloc(output, (++output_size) * sizeof(char*));
output[output_size - 1] = (char*)calloc(strlen(tok) + 1, sizeof(char));
strncpy(output[output_size - 1], tok, strlen(tok));
}
*num_tokens = output_size;
free(p_str);
return output;
}
void upm_delete_parsed_str(char **str, int num_tokens)
{
for (int i = 0; i < num_tokens; ++i) {
free(str[i]);
}
free(str);
}
#ifdef __cplusplus
}
#endif

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@ -30,7 +30,8 @@
#include <string>
#include <vector>
#include <mraa/pwm.hpp>
//#include <buzzer.h>
#include <mraa/initio.hpp>
#include <buzzer.h>
namespace upm {
@ -74,7 +75,6 @@ namespace upm {
* Instantiates a Buzzer object based on a given string.
*
* @param initStr string containing specific information for Buzzer initialization.
* Usage: TODO
*/
Buzzer(std::string initStr);
@ -128,10 +128,8 @@ namespace upm {
protected:
std::string m_name;
mraa::Pwm m_buzzer;
float volume;
bool initialized;
//buzzer_context m_buzzer;
mraa::MraaIo mraaIo;
buzzer_context m_buzzer;
private:
/* Disable implicit copy and assignment operators */
Buzzer(const Buzzer&) = delete;