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Change 1.2 kHz fill tone by a pseudo random fill (DMR DMO)

This commit is contained in:
Andy CA6JAU 2018-06-01 14:39:02 -04:00
parent eb33bdde5a
commit c86d53d9d4
1 changed files with 11 additions and 4 deletions
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15
DMRDMOTX.cpp
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@ -38,6 +38,13 @@ const uint8_t BIT_MASK_TABLE[] = {0x80U, 0x40U, 0x20U, 0x10U, 0x08U, 0x04U, 0x02
#define WRITE_BIT1(p,i,b) p[(i)>>3] = (b) ? (p[(i)>>3] | BIT_MASK_TABLE[(i)&7]) : (p[(i)>>3] & ~BIT_MASK_TABLE[(i)&7])
#define READ_BIT1(p,i) (p[(i)>>3] & BIT_MASK_TABLE[(i)&7])
// PR FILL pattern
const uint8_t PR_FILL[] =
{0x63U, 0xEAU, 0x00U, 0x76U, 0x6CU, 0x76U, 0xC4U, 0x52U, 0xC8U, 0x78U,
0x09U, 0x2DU, 0xB8U, 0x79U, 0x27U, 0x57U, 0x9BU, 0x31U, 0xBCU, 0x3EU,
0xEAU, 0x45U, 0xC3U, 0x30U, 0x49U, 0x17U, 0x93U, 0xAEU, 0x8BU, 0x6DU,
0xA4U, 0xA5U, 0xADU, 0xA2U, 0xF1U, 0x35U, 0xB5U, 0x3CU, 0x1EU};
const uint8_t DMR_SYNC = 0x5FU;
CDMRDMOTX::CDMRDMOTX() :
@ -66,11 +73,11 @@ void CDMRDMOTX::process()
m_poLen = m_txDelay;
} else {
for (unsigned int i = 0U; i < 72U; i++)
m_poBuffer[i] = DMR_SYNC;
for (unsigned int i = 0U; i < DMR_FRAME_LENGTH_BYTES; i++)
m_poBuffer[i + 39U] = m_fifo.get();
m_poBuffer[i] = m_fifo.get();
for (unsigned int i = 0U; i < 39U; i++)
m_poBuffer[i + DMR_FRAME_LENGTH_BYTES] = PR_FILL[i];
m_poLen = 72U;
}