Chip-specific oscillator management functions.
Copyright (c) 2010-2018 Microchip Technology Inc. and its subsidiaries.
Macros | |
| #define | BOARD_XOSC_STARTUP_CYCLES (BOARD_XOSC_HZ / 1000000 * BOARD_XOSC_STARTUP_US) |
| #define | CONFIG_XOSC_32KHZ_LPM |
| Define for enabling Low Power Mode for 32 kHz external oscillator. More... | |
| #define | CONFIG_XOSC_RANGE XOSC_RANGE_2TO9 |
| Board-dependent value that sets the frequency range of the external oscillator. More... | |
| #define | CONFIG_XOSC_STARTUP XOSC_STARTUP_16384 |
| Board-dependent value that determines the number of start-up cycles for external resonators, based on BOARD_XOSC_STARTUP_US. More... | |
| #define | XOSC_STARTUP_TIMEOUT (16384*(1000000/BOARD_XOSC_HZ)) |
| Number of us to wait for XOSC to start. More... | |
Oscillator identifiers | |
| #define | OSC_ID_RC2MHZ OSC_RC2MEN_bm |
| 2 MHz Internal RC Oscillator More... | |
| #define | OSC_ID_RC32MHZ OSC_RC32MEN_bm |
| 32 MHz Internal RC Oscillator More... | |
| #define | OSC_ID_RC32KHZ OSC_RC32KEN_bm |
| 32 KHz Internal RC Oscillator More... | |
| #define | OSC_ID_XOSC OSC_XOSCEN_bm |
| External Oscillator. More... | |
| #define | OSC_ID_RC8MHZ OSC_RC8MEN_bm |
| 8 MHz Internal RC Oscillator More... | |
| #define | OSC_ID_USBSOF 0xff |
| Reference from USB Start Of Frame. More... | |
External oscillator types | |
| #define | XOSC_TYPE_EXTERNAL 0 |
| External clock signal. More... | |
| #define | XOSC_TYPE_32KHZ 2 |
| 32.768 kHz resonator on TOSC More... | |
| #define | XOSC_TYPE_XTAL 3 |
| 0.4 to 16 MHz resonator on XTAL More... | |
XTAL resonator start-up cycles | |
| #define | XOSC_STARTUP_256 0 |
| 256 cycle start-up time More... | |
| #define | XOSC_STARTUP_1024 1 |
| 1 k cycle start-up time More... | |
| #define | XOSC_STARTUP_16384 2 |
| 16 k cycle start-up time More... | |
XTAL resonator frequency range | |
| #define | XOSC_RANGE_04TO2 OSC_FRQRANGE_04TO2_gc |
| 0.4 to 2 MHz frequency range More... | |
| #define | XOSC_RANGE_2TO9 OSC_FRQRANGE_2TO9_gc |
| 2 to 9 MHz frequency range More... | |
| #define | XOSC_RANGE_9TO12 OSC_FRQRANGE_9TO12_gc |
| 9 to 12 MHz frequency range More... | |
| #define | XOSC_RANGE_12TO16 OSC_FRQRANGE_12TO16_gc |
| 12 to 16 MHz frequency range More... | |
Functions | |
| static void | osc_enable_external (uint8_t id) |
| Enable external oscillator id. More... | |
| static void | osc_enable_internal (uint8_t id) |
| Enable internal oscillator id. More... | |
Oscillator Management | |
| static void | osc_disable (uint8_t id) |
| Disable oscillator id. More... | |
| static void | osc_enable (uint8_t id) |
| Enable 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... | |
XMEGA-Specific Oscillator Features | |
| static void | osc_enable_autocalibration (uint8_t id, uint8_t ref_id) |
| Enable DFLL-based automatic calibration of an internal oscillator. More... | |
| static void | osc_disable_autocalibration (uint8_t id) |
| Disable DFLL-based automatic calibration of an internal oscillator. More... | |
| static void | osc_user_calibration (uint8_t id, uint16_t calib) |
| Load a specific calibration value for the specified oscillator. More... | |
1.8.5