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Complete the CW keyer.

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This commit is contained in:
Jonathan Naylor 2020-04-16 21:15:15 +01:00
parent 4a5f985d02
commit 95e76f387c
3 changed files with 63 additions and 18 deletions
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61
FMKeyer.cpp
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@ -76,18 +76,20 @@ const uint8_t BIT_MASK_TABLE[] = {0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02
#define READ_BIT(p,i) (p[(i)>>3] & BIT_MASK_TABLE[(i)&7])
CFMKeyer::CFMKeyer() :
m_level(128 * 128),
m_wanted(false),
m_running(false),
m_poBuffer(),
m_poLen(0U)
m_poLen(0U),
m_poPos(0U),
m_dotLen(0U),
m_dotPos(0U),
m_audio(NULL),
m_audioLen(0U),
m_audioPos(0U)
{
}
uint8_t CFMKeyer::setParams(const char* text, uint8_t speed, uint16_t frequency, uint8_t level)
{
m_level = q15_t(level * 128);
for (uint8_t i = 0U; text[i] != '\0'; i++) {
for (uint8_t j = 0U; SYMBOL_LIST[j].c != 0U; j++) {
if (SYMBOL_LIST[j].c == text[i]) {
@ -107,27 +109,66 @@ uint8_t CFMKeyer::setParams(const char* text, uint8_t speed, uint16_t frequency,
}
}
q15_t value = q15_t(level * 128);
m_dotLen = 24000U / speed; // In samples
m_audioLen = 24000U / frequency; // In samples
m_audio = new q15_t[m_audioLen];
for (uint16_t i = 0U; i < m_audioLen; i++) {
if (i < (m_audioLen / 2U))
m_audio[i] = value;
else
m_audio[i] = -value;
}
return 0U;
}
void CFMKeyer::getAudio(q15_t* samples, uint8_t length)
{
if (!m_wanted && !m_running)
if (!m_wanted)
return;
for (uint8_t i = 0U; i < length; i++) {
bool b = READ_BIT(m_poBuffer, m_poPos);
if (b)
samples[i] += m_audio[m_audioPos];
m_audioPos++;
if (m_audioPos >= m_audioLen)
m_audioPos = 0U;
m_dotPos++;
if (m_dotPos >= m_dotLen) {
m_dotPos = 0U;
m_poPos++;
if (m_poPos >= m_poLen) {
stop();
return;
}
}
}
}
void CFMKeyer::start()
{
m_wanted = true;
m_wanted = true;
m_poPos = 0U;
m_dotPos = 0U;
m_audioPos = 0U;
}
void CFMKeyer::stop()
{
m_wanted = false;
m_running = false;
m_wanted = false;
m_poPos = 0U;
m_dotPos = 0U;
m_audioPos = 0U;
}
bool CFMKeyer::isRunning() const
{
return m_running;
return m_poPos > 0U || m_dotPos > 0U || m_audioPos > 0U;
}