Generate default clock signals
The "demo" from Adafruits Si5351 library is used to produce a working proof of concept which sets PLLA to 720MHz, PLLB to 705MHz and then Multisynth0, Multisynth1 and Multisynth2 to 120MHz, 12MHz and 13.56MHz respectively.
This commit is contained in:
parent
953649725b
commit
0395da78de
1 changed files with 73 additions and 0 deletions
|
@ -24,6 +24,9 @@
|
||||||
|
|
||||||
#define SI5351_ADDRESS 0x60
|
#define SI5351_ADDRESS 0x60
|
||||||
|
|
||||||
|
#define SI5351_REGISTER_3_OUTPUT_ENABLE_CONTROL 3
|
||||||
|
#define SI5351_REGISTER_177_PLL_RESET 177
|
||||||
|
|
||||||
#define SYM_ENTRY(SYM) { SYM, sizeof(SYM) / 2 }
|
#define SYM_ENTRY(SYM) { SYM, sizeof(SYM) / 2 }
|
||||||
|
|
||||||
static uint8_t EEMEM eeprom_contrast = 8;
|
static uint8_t EEMEM eeprom_contrast = 8;
|
||||||
|
@ -171,6 +174,69 @@ static volatile uint8_t enc = 0;
|
||||||
static volatile uint8_t value_contrast;
|
static volatile uint8_t value_contrast;
|
||||||
static volatile uint8_t value_backlight;
|
static volatile uint8_t value_backlight;
|
||||||
|
|
||||||
|
static const uint8_t m_si5351_regs_15to92_149to170[100][2] = {
|
||||||
|
// Init
|
||||||
|
{3, 0xFF},
|
||||||
|
{16, 0x4F}, /* CLK0 Control: 8mA drive, Multisynth 0 as CLK0 source, Clock
|
||||||
|
not inverted, Source = PLLA, Multisynth 0 in integer mode,
|
||||||
|
clock powered up */
|
||||||
|
{17, 0x4F}, /* CLK1 Control: 8mA drive, Multisynth 1 as CLK1 source, Clock
|
||||||
|
not inverted, Source = PLLA, Multisynth 1 in integer mode,
|
||||||
|
clock powered up */
|
||||||
|
{18, 0x6F}, /* CLK2 Control: 8mA drive, Multisynth 2 as CLK2 source, Clock
|
||||||
|
not inverted, Source = PLLB, Multisynth 2 in integer mode,
|
||||||
|
clock powered up */
|
||||||
|
{19, 0x80}, /* CLK3 Control: Not used ... clock powered down */
|
||||||
|
{20, 0x80}, /* CLK4 Control: Not used ... clock powered down */
|
||||||
|
{21, 0x80}, /* CLK5 Control: Not used ... clock powered down */
|
||||||
|
{22, 0x80}, /* CLK6 Control: Not used ... clock powered down */
|
||||||
|
{23, 0x80}, /* CLK7 Control: Not used ... clock powered down */
|
||||||
|
// PLL_A Setup (720MHz)
|
||||||
|
{26, 0x00},
|
||||||
|
{27, 0x05},
|
||||||
|
{28, 0x00},
|
||||||
|
{29, 0x0C},
|
||||||
|
{30, 0x66},
|
||||||
|
{31, 0x00},
|
||||||
|
{32, 0x00},
|
||||||
|
{33, 0x02},
|
||||||
|
// PLL_B Setup (705MHz)
|
||||||
|
{34, 0x02},
|
||||||
|
{35, 0x71},
|
||||||
|
{36, 0x00},
|
||||||
|
{37, 0x0C},
|
||||||
|
{38, 0x1A},
|
||||||
|
{39, 0x00},
|
||||||
|
{40, 0x00},
|
||||||
|
{41, 0x86},
|
||||||
|
// Multisynth0 Setup (120MHz)
|
||||||
|
{42, 0x00},
|
||||||
|
{43, 0x01},
|
||||||
|
{44, 0x00},
|
||||||
|
{45, 0x01},
|
||||||
|
{46, 0x00},
|
||||||
|
{47, 0x00},
|
||||||
|
{48, 0x00},
|
||||||
|
{49, 0x00},
|
||||||
|
// Multisynth1 Setup (12MHz)
|
||||||
|
{50, 0x00},
|
||||||
|
{51, 0x01},
|
||||||
|
{52, 0x00},
|
||||||
|
{53, 0x1C},
|
||||||
|
{54, 0x00},
|
||||||
|
{55, 0x00},
|
||||||
|
{56, 0x00},
|
||||||
|
{57, 0x00},
|
||||||
|
// Multisynth2 Setup (13.56MHz)
|
||||||
|
{58, 0x00},
|
||||||
|
{59, 0x01},
|
||||||
|
{60, 0x00},
|
||||||
|
{61, 0x18},
|
||||||
|
{62, 0x00},
|
||||||
|
{63, 0x00},
|
||||||
|
{64, 0x00},
|
||||||
|
{65, 0x00}};
|
||||||
|
|
||||||
static void spi_init(void) {
|
static void spi_init(void) {
|
||||||
SPI_DDR |= (1 << SPI_SCK) | (1 << SPI_MOSI) | (1 << SPI_SS);
|
SPI_DDR |= (1 << SPI_SCK) | (1 << SPI_MOSI) | (1 << SPI_SS);
|
||||||
SPI_PORT |= (1 << SPI_SS);
|
SPI_PORT |= (1 << SPI_SS);
|
||||||
|
@ -809,6 +875,13 @@ int main(void) {
|
||||||
(void) &twi_read_register;
|
(void) &twi_read_register;
|
||||||
(void) &twi_write_register;
|
(void) &twi_write_register;
|
||||||
|
|
||||||
|
for (uint16_t i = 0; i < sizeof(m_si5351_regs_15to92_149to170) / 2; i++)
|
||||||
|
twi_write_register(SI5351_ADDRESS, m_si5351_regs_15to92_149to170[i][0],
|
||||||
|
m_si5351_regs_15to92_149to170[i][1]);
|
||||||
|
|
||||||
|
twi_write_register(SI5351_ADDRESS, SI5351_REGISTER_177_PLL_RESET, 0xAC);
|
||||||
|
twi_write_register(SI5351_ADDRESS, SI5351_REGISTER_3_OUTPUT_ENABLE_CONTROL, 0x00);
|
||||||
|
|
||||||
// Enable interrupts
|
// Enable interrupts
|
||||||
sei();
|
sei();
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue