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r divider configurable, added CLK5 for mixer reference input

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This commit is contained in:
Michael Ossmann
2012-06-13 16:02:40 -06:00
parent 287e64a9c0
commit 056ddd0601
3 changed files with 47 additions and 13 deletions
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9
firmware/common/hackrf_core.c
View File

@ -49,13 +49,16 @@ void cpu_clock_init(void)
si5351c_configure_pll1_multisynth();
/* MS0/CLK0 is the source for the MAX2837 clock input. */
si5351c_configure_multisynth(0, 2048, 0, 1); /* 40MHz */
si5351c_configure_multisynth(0, 2048, 0, 1, 0); /* 40MHz */
/* MS1/CLK1 is the source for the MAX5864 codec. */
si5351c_configure_multisynth(1, 4608, 0, 1); /* 20MHz */
si5351c_configure_multisynth(1, 4608, 0, 1, 1); /* 20MHz derived from MS0 */
/* MS4/CLK4 is the source for the LPC43xx microcontroller. */
si5351c_configure_multisynth(4, 8021, 1, 3); /* 12MHz */
si5351c_configure_multisynth(4, 8021, 1, 3, 0); /* 12MHz */
/* MS5/CLK5 is the source for the RFFC5071 mixer. */
si5351c_configure_multisynth(5, 1536, 1, 1, 0); /* 50MHz */
si5351c_configure_clock_control();
si5351c_enable_clock_outputs();

44
firmware/common/si5351c.c
View File

@ -87,7 +87,7 @@ void si5351c_disable_oeb_pin_control()
/* Power down all CLKx */
void si5351c_power_down_all_clocks()
{
uint8_t data[] = { 16, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80 };
uint8_t data[] = { 16, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0xC0, 0xC0 };
si5351c_write(data, sizeof(data));
}
@ -132,18 +132,27 @@ void si5351c_configure_pll1_multisynth()
}
void si5351c_configure_multisynth(const uint_fast8_t ms_number,
const uint32_t p1, const uint32_t p2, const uint32_t p3)
const uint32_t p1, const uint32_t p2, const uint32_t p3,
const uint_fast8_t r)
{
/*
* TODO: Check for p3 > 0? 0 has no meaning in fractional mode?
* And it makes for more jitter in integer mode.
*/
/*
* r is the r divider value encoded:
* 0 means divide by 1
* 1 means divide by 2
* 2 means divide by 4
* ...
* 7 means divide by 128
*/
const uint_fast8_t register_number = 42 + (ms_number * 8);
uint8_t data[] = {
register_number,
(p3 >> 8) & 0xFF,
(p3 >> 0) & 0xFF,
(0 << 4) | (0 << 2) | ((p1 >> 16) & 0x3),
(r << 4) | (0 << 2) | ((p1 >> 16) & 0x3),
(p1 >> 8) & 0xFF,
(p1 >> 0) & 0xFF,
(((p3 >> 16) & 0xF) << 4) | (((p2 >> 16) & 0xF) << 0),
@ -166,8 +175,22 @@ void si5351c_configure_multisynth( const uint_fast8_t ms_number,
* MS1_INT=1 (integer mode)
* MS1_SRC=0 (PLLA as source for MultiSynth 1)
* CLK1_INV=0 (not inverted)
* CLK1_SRC=3 (MS1 as input source)
* CLK1_SRC=3 (MS0 as input source)
* CLK1_IDRV=3 (8mA)
* CLK2:
* CLK2_PDN=0 (powered up)
* MS2_INT=1 (integer mode)
* MS2_SRC=0 (PLLA as source for MultiSynth 2)
* CLK2_INV=0 (not inverted)
* CLK2_SRC=3 (MS0 as input source)
* CLK2_IDRV=3 (8mA)
* CLK3:
* CLK3_PDN=0 (powered up)
* MS3_INT=1 (integer mode)
* MS3_SRC=0 (PLLA as source for MultiSynth 3)
* CLK3_INV=0 (not inverted)
* CLK3_SRC=3 (MS0 as input source)
* CLK3_IDRV=3 (8mA)
* CLK4:
* CLK4_PDN=0 (powered up)
* MS4_INT=0 (fractional mode -- to support 12MHz to LPC for USB DFU)
@ -175,16 +198,23 @@ void si5351c_configure_multisynth( const uint_fast8_t ms_number,
* CLK4_INV=0 (not inverted)
* CLK4_SRC=3 (MS4 as input source)
* CLK4_IDRV=3 (8mA)
* CLK5:
* CLK5_PDN=0 (powered up)
* MS5_INT=1 (integer mode)
* MS5_SRC=0 (PLLA as source for MultiSynth 5)
* CLK5_INV=0 (not inverted)
* CLK5_SRC=3 (MS5 as input source)
* CLK5_IDRV=3 (8mA)
*/
void si5351c_configure_clock_control()
{
uint8_t data[] = { 16, 0x4F, 0x4F, 0x80, 0x80, 0x0F, 0x80, 0x80, 0x80 };
uint8_t data[] = { 16, 0x4F, 0x4B, 0x4B, 0x4B, 0x0F, 0x4F, 0xC0, 0xC0 };
si5351c_write(data, sizeof(data));
}
/* Enable CLK outputs 0, 1, 4 only. */
/* Enable CLK outputs 0, 1, 4, 5 only. */
void si5351c_enable_clock_outputs()
{
uint8_t data[] = { 3, 0xEC };
uint8_t data[] = { 3, 0xCC };
si5351c_write(data, sizeof(data));
}

3
firmware/common/si5351c.h
View File

@ -40,7 +40,8 @@ void si5351c_enable_xo_and_ms_fanout();
void si5351c_configure_pll_sources_for_xtal();
void si5351c_configure_pll1_multisynth();
void si5351c_configure_multisynth(const uint_fast8_t ms_number,
const uint32_t p1, const uint32_t p2, const uint32_t p3);
const uint32_t p1, const uint32_t p2, const uint32_t p3,
const uint_fast8_t r);
void si5351c_configure_clock_control();
void si5351c_enable_clock_outputs();