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Imrpoved sound quality in analog_audio_app, and added Nyquist protection option to BBW filter for praline. (#3054)

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stafur
2026-02-28 17:36:01 -05:00
committed by GitHub
parent b013e68b17
commit 3a54b112ec
7 changed files with 225 additions and 74 deletions
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firmware/application/portapack.cpp
-19
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@@ -589,25 +589,6 @@ init_status_t init() {
clock_manager.init_clock_generator();
#ifdef PRALINE
// Force CLK4/CLK5 configuration BEFORE I2C bus stops
// This ensures the inversion bits are written while I2C is still active
// CLK4 (MAX2831): ON, Integer, PLLA, INVERTED, MS_Self, 4mA = 0x5D
clock_manager.si5351_write_register(20, 0x5D);
// CLK5 (RFFC5072): ON, Integer, PLLA, INVERTED, MS_Self, 6mA = 0x5E
clock_manager.si5351_write_register(21, 0x5E);
// Enable CLK4 and CLK5 outputs NOW (before I2C stops)
uint8_t reg3 = clock_manager.si5351_read_register(3);
reg3 &= ~0x30; // Clear bits 4 and 5 to enable
clock_manager.si5351_write_register(3, reg3);
// Wait for clocks to stabilize
chThdSleepMilliseconds(10);
#endif
i2c0.stop();
chThdSleepMilliseconds(10);