49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
#ifndef __CLOCK_ENABLE_MANAGER_H__
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#define __CLOCK_ENABLE_MANAGER_H__
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#include <stdint.h>
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#include <stm32-gpio-macros.h>
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/**
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* @brief The RCC Enable Manager uses static memory with a fixed maximum
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*/
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#define RCC_ENABLE_MANAGER_STATIC 1U
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#if RCC_ENABLE_MANAGER_STATIC
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#define RCC_ENABLE_MANAGER_COUNT 30U
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#else
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#error "RCC Enable Manager not yet implemented with dynamic memory"
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#endif
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/**
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* @brief Enable Clock for peripheral by setting the corresponding bit (@p bit_no) to one
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*
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* This function also keeps a enable count on each bit that is set, in order to allow nested enables/disables
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*
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* If there is no more space to track a new register bit in memory (either due to the static limit or due to no remaining heap space),
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* the function still enables the peripheral clock but does not track it and returns -1
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*
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* @param rcc_enable_register
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* @param bit_no
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*
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* @return 0 if successful
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*/
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int rcc_manager_enable_clock(volatile uint32_t *rcc_enable_register, uint8_t bit_no);
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/**
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* @brief Disable clock for peripheral and decrement the enaböe-counter of that bit.
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*
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* If there is no bit entry in the counting table yet, teh peripheral clock is not disabled and error code
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* -1 is returned.
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*
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* If the count reaches zero, the element is removed from the list to make room for new ones
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*
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* @param rcc_enable_register Register to disable the bit in
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* @param bit_no Bit number (0 to 31) of the bit to disable
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* @return 0 if successful
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*/
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int rcc_manager_disable_clock(volatile uint32_t *rcc_enable_register, uint8_t bit_no);
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#endif /* __CLOCK_ENABLE_MANAGER_H__ */
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