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#include "sclock.hpp"
GPTDriver *SClock::m_timer = &GPTD6;
unsigned int SClock::m_div = 1;
unsigned int SClock::m_runcount = 0;
const GPTConfig SClock::m_timer_config = {
#if defined(TARGET_PLATFORM_H7)
.frequency = 4800000,
#else
.frequency = 36000000,
#endif
.callback = nullptr,
.cr2 = TIM_CR2_MMS_1, /* TRGO */
.dier = 0
};
const std::array<unsigned int, 6> SClock::m_rate_divs = {{
#if defined(TARGET_PLATFORM_H7)
/* 8k */ 600,
/* 16k */ 300,
/* 20k */ 240,
/* 32k */ 150,
/* 48k */ 100,
/* 96k */ 50
#else
4500, 2250, 1800, 1125, 750, 375
#endif
}};
void SClock::begin()
{
gptStart(m_timer, &m_timer_config);
}
void SClock::start()
{
if (m_runcount++ == 0)
gptStartContinuous(m_timer, m_div);
}
void SClock::stop()
{
if (--m_runcount == 0)
gptStopTimer(m_timer);
}
void SClock::setRate(SClock::Rate rate)
{
m_div = m_rate_divs[static_cast<unsigned int>(rate)];
}
unsigned int SClock::getRate()
{
for (unsigned int i = 0; i < m_rate_divs.size(); ++i) {
if (m_rate_divs[i] == m_div)
return i;
}
return static_cast<unsigned int>(-1);
}
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