Chip-specific oscillator management functions.
Copyright (c) 2010-2018 Microchip Technology Inc. and its subsidiaries.
Macros | |
| #define | AVR32_SCIF_OSCCTRL32_MODE_CRYSTAL_AGC 0x00000001 |
| #define | AVR32_SCIF_OSCCTRL32_MODE_CRYSTAL_NO_AGC 0x00000004 |
| #define | AVR32_SCIF_OSCCTRL32_MODE_EXT_CLOCK 0x00000000 |
| #define | OSC0_MODE_VALUE UNDEFINED |
| Board-dependent value written to the MODE bitfield of PM_OSCCTRL(0) More... | |
| #define | OSC0_STARTUP_TIMEOUT UNDEFINED |
| Number of slow clock cycles to wait for OSC0 to start. More... | |
| #define | OSC0_STARTUP_VALUE UNDEFINED |
| Board-dependent value written to the STARTUP bitfield of PM_OSCCTRL(0) More... | |
| #define | OSC32_MODE_VALUE UNDEFINED |
| #define | OSC32_STARTUP_TIMEOUT UNDEFINED |
| #define | OSC32_STARTUP_VALUE UNDEFINED |
Oscillator identifiers | |
| #define | OSC_ID_OSC0 0 |
| External Oscillator 0. More... | |
| #define | OSC_ID_OSC32 1 |
| External 32 kHz oscillator. More... | |
| #define | OSC_ID_RC32K 2 |
| Internal 32 kHz RC oscillator. More... | |
| #define | OSC_ID_RC120M 3 |
| Internal 120 MHz RC oscillator. More... | |
| #define | OSC_ID_RCSYS 4 |
| Internal System RC oscillator. More... | |
OSC0 mode values | |
| #define | OSC_MODE_EXTERNAL AVR32_SCIF_OSCCTRL0_MODE_EXT_CLOCK |
| External clock connected to XIN. More... | |
| #define | OSC_MODE_XTAL AVR32_SCIF_OSCCTRL0_MODE_CRYSTAL |
| Crystal connected to XIN/XOUT. More... | |
OSC32 mode values | |
| #define | OSC32_MODE_EXTERNAL AVR32_SCIF_OSCCTRL32_MODE_EXT_CLOCK |
| External clock connected to XIN32. More... | |
| #define | OSC32_MODE_XTAL AVR32_SCIF_OSCCTRL32_MODE_CRYSTAL_AGC |
| Crystal connected to XIN32/XOUT32. More... | |
| #define | OSC32_MODE_XTAL_HC AVR32_SCIF_OSCCTRL32_MODE_CRYSTAL_NO_AGC |
| Crystal connected to XIN32/XOUT32 in high current mode. More... | |
OSC0 startup values | |
| #define | OSC_STARTUP_0 AVR32_SCIF_OSCCTRL0_STARTUP_0_RCOSC |
| 0 cycles More... | |
| #define | OSC_STARTUP_64 AVR32_SCIF_OSCCTRL0_STARTUP_64_RCOSC |
| 64 cycles (560 us) More... | |
| #define | OSC_STARTUP_128 AVR32_SCIF_OSCCTRL0_STARTUP_128_RCOSC |
| 128 cycles (1.1 ms) More... | |
| #define | OSC_STARTUP_2048 AVR32_SCIF_OSCCTRL0_STARTUP_2048_RCOSC |
| 2048 cycles (18 ms) More... | |
| #define | OSC_STARTUP_4096 AVR32_SCIF_OSCCTRL0_STARTUP_4096_RCOSC |
| 4096 cycles (36 ms) More... | |
| #define | OSC_STARTUP_8192 AVR32_SCIF_OSCCTRL0_STARTUP_8192_RCOSC |
| 8192 cycles (71 ms) More... | |
| #define | OSC_STARTUP_16384 AVR32_SCIF_OSCCTRL0_STARTUP_16384_RCOSC |
| 16384 cycles (142 ms) More... | |
OSC32 startup values | |
| #define | OSC32_STARTUP_0 AVR32_SCIF_OSCCTRL32_STARTUP_0_RCOSC |
| 0 cycles More... | |
| #define | OSC32_STARTUP_128 AVR32_SCIF_OSCCTRL32_STARTUP_128_RCOSC |
| 128 cycles (1.1 ms) More... | |
| #define | OSC32_STARTUP_8192 AVR32_SCIF_OSCCTRL32_STARTUP_8192_RCOSC |
| 8192 cycles (72.3 ms) More... | |
| #define | OSC32_STARTUP_16384 AVR32_SCIF_OSCCTRL32_STARTUP_16384_RCOSC |
| 16384 cycles (143 ms) More... | |
| #define | OSC32_STARTUP_65536 AVR32_SCIF_OSCCTRL32_STARTUP_65536_RCOSC |
| 65536 cycles (570 ms) More... | |
| #define | OSC32_STARTUP_131072 AVR32_SCIF_OSCCTRL32_STARTUP_131072_RCOSC |
| 131072 cycles (1.1 s) More... | |
| #define | OSC32_STARTUP_262144 AVR32_SCIF_OSCCTRL32_STARTUP_262144_RCOSC |
| 262144 cycles (2.3 s) More... | |
| #define | OSC32_STARTUP_524288 AVR32_SCIF_OSCCTRL32_STARTUP_524288_RCOSC |
| 524288 cycles (4.6 s) More... | |
Board-specific configuration parameters | |
The following definitions must be provided by the board code for all working oscillators on the board. | |
| #define | BOARD_OSC32_PINSEL 0 |
| If set to 1, use XIN32_2/XOUT32_2 pins for OSC32. More... | |
RC oscillator frequency limits | |
The frequency of the internal RC oscillators may drift a bit as a result of temperature changes. These definitions provide upper and lower limits which may be used to calculate upper and lower limits of timeouts, derived clock frequencies, etc. | |
| #define | OSC_RCSYS_NOMINAL_HZ 115000 |
| Nominal frequency of RCSYS in Hz. More... | |
| #define | OSC_RCSYS_MIN_HZ 100000 |
| Minimum frequency of RCSYS in Hz. More... | |
| #define | OSC_RCSYS_MAX_HZ 120000 |
| Maximum frequency of RCSYS in Hz. More... | |
| #define | OSC_RC32K_NOMINAL_HZ 32000 |
| Nominal frequency of RC32K in Hz. More... | |
| #define | OSC_RC32K_MIN_HZ 20000 |
| Minimum frequency of RC32K in Hz. More... | |
| #define | OSC_RC32K_MAX_HZ 44000 |
| Maximum frequency of RC32K in Hz. More... | |
| #define | OSC_RC120M_NOMINAL_HZ 120000000 |
| Nominal frequency of RC120M in Hz. More... | |
Functions | |
| void | osc_priv_disable_osc0 (void) |
| void | osc_priv_disable_osc32 (void) |
| void | osc_priv_disable_rc120m (void) |
| void | osc_priv_disable_rc32k (void) |
| void | osc_priv_enable_osc0 (void) |
| void | osc_priv_enable_osc32 (void) |
| void | osc_priv_enable_rc120m (void) |
| void | osc_priv_enable_rc32k (void) |
Oscillator Management | |
| static void | osc_enable (uint8_t id) |
| Enable oscillator id. More... | |
| static void | osc_disable (uint8_t id) |
| Disable oscillator id. More... | |
| static bool | osc_is_ready (uint8_t id) |
| Determine whether oscillator id is ready. More... | |
| static uint32_t | osc_get_rate (uint8_t id) |
| Return the frequency of oscillator id in Hz. More... | |
| #define AVR32_SCIF_OSCCTRL32_MODE_CRYSTAL_AGC 0x00000001 |
| #define AVR32_SCIF_OSCCTRL32_MODE_CRYSTAL_NO_AGC 0x00000004 |
| #define AVR32_SCIF_OSCCTRL32_MODE_EXT_CLOCK 0x00000000 |
1.8.5