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maintain PLLA on XTAL and PLLB on CLKIN at all times (makes automatic clock source switching more reliable)

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This commit is contained in:
Michael Ossmann
2014-03-14 22:27:30 -06:00
parent ca04d7c04b
commit 15bda174c7
3 changed files with 43 additions and 34 deletions
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5
firmware/common/hackrf_core.c
View File

@ -268,7 +268,8 @@ void cpu_clock_init(void)
si5351c_power_down_all_clocks();
si5351c_set_crystal_configuration();
si5351c_enable_xo_and_ms_fanout();
si5351c_set_clock_source(PLL_SOURCE_XTAL);
si5351c_configure_pll_sources();
si5351c_configure_pll_multisynth();
#ifdef JELLYBEAN
/*
@ -324,7 +325,7 @@ void cpu_clock_init(void)
/* Set to 10 MHz, the common rate between Jellybean and Jawbreaker. */
sample_rate_set(10000000);
si5351c_configure_clock_control();
si5351c_set_clock_source(PLL_SOURCE_XTAL);
// soft reset
uint8_t resetdata[] = { 177, 0xac };
si5351c_write(resetdata, sizeof(resetdata));

65
firmware/common/si5351c.c
View File

@ -126,34 +126,34 @@ void si5351c_enable_xo_and_ms_fanout()
/*
* Register 15: PLL Input Source
* CLKIN_DIV=0 (Divide by 1)
* PLLB_SRC=0 (XTAL input)
* PLLA_SRC=0 (XTAL input)
* PLLA_SRC=0 (XTAL)
* PLLB_SRC=1 (CLKIN)
*/
void si5351c_configure_pll_sources(const enum pll_sources source)
void si5351c_configure_pll_sources(void)
{
uint8_t data[] = { 15, 0x00 };
if (source == PLL_SOURCE_CLKIN) {
data[1] = 0x0C;
}
uint8_t data[] = { 15, 0x08 };
si5351c_write(data, sizeof(data));
}
/* MultiSynth NA (PLL1) */
void si5351c_configure_pll1_multisynth(const enum pll_sources source)
/* MultiSynth NA (PLLA) and NB (PLLB) */
void si5351c_configure_pll_multisynth(void)
{
//init plla to (0x0e00+512)/128*25mhz xtal = 800mhz -> int mode
uint8_t data[] = { 26, 0x00, 0x01, 0x00, 0x0E, 0x00, 0x00, 0x00, 0x00 };
if (source == PLL_SOURCE_CLKIN) {
/* 10 MHz input on CLKIN instead of 25 MHz XTAL */
data[4] = 0x26;
}
si5351c_write(data, sizeof(data));
//~ data[0] =34;// pllb
//~ si5351c_write(data, sizeof(data));
/* 10 MHz input on CLKIN for PLLB */
data[0] = 34;
data[4] = 0x26;
si5351c_write(data, sizeof(data));
}
void si5351c_reset_pll(void)
{
/* reset PLLA and PLLB */
uint8_t data[] = { 177, 0xA0 };
si5351c_write(data, sizeof(data));
}
void si5351c_configure_multisynth(const uint_fast8_t ms_number,
@ -240,17 +240,26 @@ void si5351c_configure_clock_control()
#endif
#if (defined JAWBREAKER || defined HACKRF_ONE)
void si5351c_configure_clock_control()
void si5351c_configure_clock_control(const enum pll_sources source)
{
uint8_t pll;
if (source == PLL_SOURCE_CLKIN) {
/* PLLB on CLKIN */
pll = SI5351C_CLK_PLL_SRC_B;
} else {
/* PLLA on XTAL */
pll = SI5351C_CLK_PLL_SRC_A;
}
uint8_t data[] = {16
,SI5351C_CLK_FRAC_MODE | SI5351C_CLK_PLL_SRC(SI5351C_CLK_PLL_SRC_A) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_2MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(SI5351C_CLK_PLL_SRC_A) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_0_4) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_2MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(SI5351C_CLK_PLL_SRC_A) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_0_4) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_2MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(SI5351C_CLK_PLL_SRC_A) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_8MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(SI5351C_CLK_PLL_SRC_A) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_6MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(SI5351C_CLK_PLL_SRC_A) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_4MA)
,SI5351C_CLK_FRAC_MODE | SI5351C_CLK_PLL_SRC(pll) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_2MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(pll) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_0_4) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_2MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(pll) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_0_4) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_2MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(pll) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_8MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(pll) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_6MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(pll) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_4MA)
,SI5351C_CLK_POWERDOWN | SI5351C_CLK_INT_MODE /*not connected, but: plla int mode*/
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(SI5351C_CLK_PLL_SRC_A) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_8MA)
,SI5351C_CLK_INT_MODE | SI5351C_CLK_PLL_SRC(pll) | SI5351C_CLK_SRC(SI5351C_CLK_SRC_MULTISYNTH_SELF) | SI5351C_CLK_IDRV(SI5351C_CLK_IDRV_8MA)
};
si5351c_write(data, sizeof(data));
}
@ -283,9 +292,7 @@ void si5351c_configure_clock_control()
void si5351c_set_clock_source(const enum pll_sources source)
{
si5351c_configure_pll_sources(source);
si5351c_configure_pll1_multisynth(source);
si5351c_configure_clock_control(PLL_SOURCE_XTAL);
active_clock_source = source;
}

7
firmware/common/si5351c.h
View File

@ -67,12 +67,13 @@ void si5351c_disable_oeb_pin_control();
void si5351c_power_down_all_clocks();
void si5351c_set_crystal_configuration();
void si5351c_enable_xo_and_ms_fanout();
void si5351c_configure_pll_sources(const enum pll_sources source);
void si5351c_configure_pll1_multisynth(const enum pll_sources source);
void si5351c_configure_pll_sources(void);
void si5351c_configure_pll_multisynth(void);
void si5351c_reset_pll(void);
void si5351c_configure_multisynth(const uint_fast8_t ms_number,
const uint32_t p1, const uint32_t p2, const uint32_t p3,
const uint_fast8_t r_div);
void si5351c_configure_clock_control();
void si5351c_configure_clock_control(const enum pll_sources source);
void si5351c_enable_clock_outputs();
void si5351c_set_int_mode(const uint_fast8_t ms_number, const uint_fast8_t on);