Chip-specific system clock management functions.
Copyright (c) 2009-2018 Microchip Technology Inc. and its subsidiaries.
Macros | |
| #define | AVR32_ACIFB_CLK_PBA 86 |
| #define | AVR32_ADCIFB_CLK_PBA 85 |
| #define | AVR32_AW_ADDRESS 0xFFFF7000 |
| #define | AVR32_AW_CLK_PBA 89 |
| #define | AVR32_CAT_CLK_PBA 87 |
| #define | AVR32_CORE_CLK_CPU_COUNT 16 |
| #define | AVR32_GLOC_CLK_PBA 88 |
| #define | AVR32_TC1_CLK_PBA 84 |
| #define | CONFIG_SYSCLK_CPU_DIV 0 |
| Configuration symbol for dividing the CPU clock frequency by \(2^{CONFIG\_SYSCLK\_CPU\_DIV}\). More... | |
| #define | CONFIG_SYSCLK_INIT_CPUMASK |
| Configuration symbol for the CPU clocks enabled at power-on after the sysclock module has been initialized. More... | |
| #define | CONFIG_SYSCLK_INIT_HSBMASK |
| Configuration symbol for the HSB clocks enabled at power-on after the sysclock module has been initialized. More... | |
| #define | CONFIG_SYSCLK_INIT_PBAMASK |
| Configuration symbol for the PBA clocks enabled at power-on after the sysclock module has been initialized. More... | |
| #define | CONFIG_SYSCLK_INIT_PBBMASK |
| Configuration symbol for the PBB clocks enabled at power-on after the sysclock module has been initialized. More... | |
| #define | CONFIG_SYSCLK_PBA_DIV 0 |
| Configuration symbol for dividing the PBA clock frequency by \(2^{CONFIG\_SYSCLK\_PBA\_DIV}\). More... | |
| #define | CONFIG_SYSCLK_PBB_DIV 0 |
| Configuration symbol for dividing the PBB clock frequency by \(2^{CONFIG\_SYSCLK\_PBB\_DIV}\). More... | |
System clock source | |
| #define | SYSCLK_SRC_RCSYS AVR32_PM_MCSEL_SLOW |
| System RC oscillator. More... | |
| #define | SYSCLK_SRC_OSC0 AVR32_PM_MCSEL_OSC0 |
| Oscillator 0. More... | |
| #define | SYSCLK_SRC_DFLL AVR32_PM_MCSEL_DFLL0 |
| Digital Frequency Locked Loop. More... | |
| #define | SYSCLK_SRC_RC120M AVR32_PM_MCSEL_RC120M |
| 120 MHz RC oscillator More... | |
Clocks derived from the CPU clock | |
| #define | SYSCLK_OCD AVR32_OCD_CLK_CPU |
| On-Chip Debug system. More... | |
| #define | SYSCLK_SYSTIMER AVR32_CORE_CLK_CPU_COUNT |
| COUNT/COMPARE registers. More... | |
Clocks derived from the HSB clock | |
| #define | SYSCLK_PDCA_HSB (AVR32_PDCA_CLK_HSB % 32) |
| PDCA memory interface. More... | |
| #define | SYSCLK_FLASHCDW_DATA (AVR32_FLASHCDW_CLK_HSB % 32) |
| Flash data interface. More... | |
| #define | SYSCLK_SAU_HSB (AVR32_SAU_CLK_HSB % 32) |
| Secure Access Unit HSB interface. More... | |
| #define | SYSCLK_PBA_BRIDGE (AVR32_HMATRIX_CLK_HSB_PBA_BRIDGE % 32) |
| HSB<->PBA bridge. More... | |
| #define | SYSCLK_PBB_BRIDGE (AVR32_HMATRIX_CLK_HSB_PBB_BRIDGE % 32) |
| HSB<->PBB bridge. More... | |
| #define | SYSCLK_EVENT (AVR32_PES_CLK_HSB % 32) |
| Peripheral Event System. More... | |
Clocks derived from the PBA clock | |
| #define | SYSCLK_PDCA_PB (AVR32_PDCA_CLK_PBA % 32) |
| PDCA peripheral bus interface. More... | |
| #define | SYSCLK_INTC (AVR32_INTC_CLK_PBA % 32) |
| Internal interrupt controller. More... | |
| #define | SYSCLK_PM (AVR32_PM_CLK_PBA % 32) |
| PM/RTC/EIM configuration. More... | |
| #define | SYSCLK_SCIF (AVR32_SCIF_CLK_PBA % 32) |
| System Control Interface. More... | |
| #define | SYSCLK_AST (AVR32_AST_CLK_PBA % 32) |
| Asynchronous Timer. More... | |
| #define | SYSCLK_WDT (AVR32_WDT_CLK_PBA % 32) |
| Watchdog Timer. More... | |
| #define | SYSCLK_EIC (AVR32_EIC_CLK_PBA % 32) |
| External Interrupt Controller. More... | |
| #define | SYSCLK_FREQM (AVR32_FREQM_CLK_PBA % 32) |
| Frequency Meter. More... | |
| #define | SYSCLK_GPIO (AVR32_GPIO_CLK_PBA % 32) |
| General-Purpose I/O. More... | |
| #define | SYSCLK_USART0 (AVR32_USART0_CLK_PBA % 32) |
| USART 0. More... | |
| #define | SYSCLK_USART1 (AVR32_USART1_CLK_PBA % 32) |
| USART 1. More... | |
| #define | SYSCLK_USART2 (AVR32_USART2_CLK_PBA % 32) |
| USART 2. More... | |
| #define | SYSCLK_USART3 (AVR32_USART3_CLK_PBA % 32) |
| USART 3. More... | |
| #define | SYSCLK_SPI (AVR32_SPI_CLK_PBA % 32) |
| SPI Controller. More... | |
| #define | SYSCLK_TWIM0 (AVR32_TWIM0_CLK_PBA % 32) |
| TWI Master 0. More... | |
| #define | SYSCLK_TWIM1 (AVR32_TWIM1_CLK_PBA % 32) |
| TWI Master 1. More... | |
| #define | SYSCLK_TWIS0 (AVR32_TWIS0_CLK_PBA % 32) |
| TWI Slave 0. More... | |
| #define | SYSCLK_TWIS1 (AVR32_TWIS1_CLK_PBA % 32) |
| TWI Slave 1. More... | |
| #define | SYSCLK_PWMA (AVR32_PWMA_CLK_PBA % 32) |
| Pulse Width Modulator. More... | |
| #define | SYSCLK_TC0 (AVR32_TC0_CLK_PBA % 32) |
| Timer/Counter 0. More... | |
| #define | SYSCLK_TC1 (AVR32_TC1_CLK_PBA % 32) |
| Timer/Counter 1. More... | |
| #define | SYSCLK_ADCIFB (AVR32_ADCIFB_CLK_PBA % 32) |
| A/D Converter. More... | |
| #define | SYSCLK_ACIFB (AVR32_ACIFB_CLK_PBA % 32) |
| Analog Comparator. More... | |
| #define | SYSCLK_CAT (AVR32_CAT_CLK_PBA % 32) |
| Capacitive Touch. More... | |
| #define | SYSCLK_GLOC (AVR32_GLOC_CLK_PBA % 32) |
| Glue Logic Controller. More... | |
| #define | SYSCLK_AW (AVR32_AW_CLK_PBA % 32) |
| aWire UART More... | |
Clocks derived from the PBB clock | |
| #define | SYSCLK_FLASHCDW_REGS (AVR32_FLASHC_CLK_PBB % 32) |
| Flash Controller registers. More... | |
| #define | SYSCLK_HMATRIX (AVR32_HMATRIX_CLK_PBB % 32) |
| HSB Matrix configuration. More... | |
| #define | SYSCLK_SAU_REGS (AVR32_SAU_CLK_PBB % 32) |
| Secure Access Unit register. More... | |
Example Configuration | |
| #define | CONFIG_SYSCLK_SOURCE SYSCLK_SRC_RCSYS |
| Clock source to use. More... | |
Functions | |
| void | sysclk_priv_disable_module (unsigned int bus_id, unsigned int module_index) |
| Disable a maskable module clock. More... | |
| void | sysclk_priv_enable_module (unsigned int bus_id, unsigned int module_index) |
| Enable a maskable module clock. More... | |
Querying the system clock and its derived clocks | |
The following functions may be used to query the current frequency of the system clock and the CPU and bus clocks derived from it. sysclk_get_main_hz() and sysclk_get_cpu_hz() can be assumed to be available on all platforms, although some platforms may define additional accessors for various chip-internal bus clocks. These are usually not intended to be queried directly by generic code. | |
| static uint32_t | sysclk_get_main_hz (void) |
| Return the current rate in Hz of the main system clock. More... | |
| static uint32_t | sysclk_get_cpu_hz (void) |
| Return the current rate in Hz of the CPU clock. More... | |
| static uint32_t | sysclk_get_hsb_hz (void) |
| Return the current rate in Hz of the High-Speed Bus clock. More... | |
| static uint32_t | sysclk_get_pba_hz (void) |
| Return the current rate in Hz of the Peripheral Bus A clock. More... | |
| static uint32_t | sysclk_get_pbb_hz (void) |
| Return the current rate in Hz of the Peripheral Bus B clock. More... | |
| static uint32_t | sysclk_get_peripheral_bus_hz (const volatile void *module) |
| Retrieves the current rate in Hz of the Peripheral Bus clock attached to the specified peripheral. More... | |
Enabling and disabling synchronous clocks | |
| static void | sysclk_enable_cpu_module (unsigned int index) |
| Enable a module clock derived from the CPU clock. More... | |
| static void | sysclk_disable_cpu_module (unsigned int index) |
| Disable a module clock derived from the CPU clock. More... | |
| static void | sysclk_enable_hsb_module (unsigned int index) |
| Enable a module clock derived from the HSB clock. More... | |
| static void | sysclk_disable_hsb_module (unsigned int index) |
| Disable a module clock derived from the HSB clock. More... | |
| static void | sysclk_enable_pba_module (unsigned int index) |
| Enable a module clock derived from the PBA clock. More... | |
| static void | sysclk_disable_pba_module (unsigned int index) |
| Disable a module clock derived from the PBA clock. More... | |
| void | sysclk_enable_pbb_module (unsigned int index) |
| Enable a module clock derived from the PBB clock. More... | |
| void | sysclk_disable_pbb_module (unsigned int index) |
| Disable a module clock derived from the PBB clock. More... | |
| static void | sysclk_enable_peripheral_clock (const volatile void *module) |
| Enable a peripheral's clock from its base address. More... | |
| static void | sysclk_disable_peripheral_clock (const volatile void *module) |
| Disable a peripheral's clock from its base address. More... | |
System Clock Source and Prescaler configuration | |
| void | sysclk_set_prescalers (unsigned int cpu_shift, unsigned int pba_shift, unsigned int pbb_shift) |
| Set system clock prescaler configuration. More... | |
| void | sysclk_set_source (uint_fast8_t src) |
| Change the source of the main system clock. More... | |
System Clock Initialization | |
| void | sysclk_init (void) |
| Initialize the synchronous clock system. More... | |
| #define AVR32_ACIFB_CLK_PBA 86 |
| #define AVR32_ADCIFB_CLK_PBA 85 |
| #define AVR32_AW_ADDRESS 0xFFFF7000 |
| #define AVR32_AW_CLK_PBA 89 |
| #define AVR32_CAT_CLK_PBA 87 |
| #define AVR32_CORE_CLK_CPU_COUNT 16 |
| #define AVR32_GLOC_CLK_PBA 88 |
| #define AVR32_TC1_CLK_PBA 84 |
1.8.5