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81 lines
2.4 KiB
81 lines
2.4 KiB
//
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// Utilities for parsing pins from settings to LL and resources
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//
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// Created by MightyPork on 2017/12/08.
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//
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#ifndef GEX_PIN_UTILS_H
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#define GEX_PIN_UTILS_H
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#include "platform.h"
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#include "resources.h"
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/**
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* Convert pin number to LL driver bitfield for working with the pin.
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*
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* @param pin_number - number 0..15
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* @param suc - set to false on failure, left unchanged on success.
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* @return LL_GPIO_PIN_x
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*/
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uint32_t pin2ll(uint8_t pin_number, bool *suc);
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/**
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* Convert pin name and number to a resource enum
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*
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* @param port_name - char 'A'..'Z'
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* @param pin_number - number 0..15
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* @param suc - set to false on failure, left unchanged on success
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* @return the resource, or R_NONE
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*/
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Resource pin2resource(char port_name, uint8_t pin_number, bool *suc);
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/**
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* Convert port name to peripheral instance
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*
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* @param port_name - char 'A'..'Z'
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* @param suc - set to false on failure, left unchanged on success.
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* @return instance
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*/
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GPIO_TypeDef *port2periph(char port_name, bool *suc);
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/** Parse a pin name PA0 or A0 to port name and pin number */
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bool parse_pin(const char *str, char *targetName, uint8_t *targetNumber);
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/** Parse a port name */
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bool parse_port(const char *value, char *targetName);
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/** Parse a list of pin numbers with ranges and commans/semicolons to a bitmask */
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uint16_t parse_pinmask(const char *value, bool *suc);
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/** Convert a pin bitmask to the ASCII format understood by str_parse_pinmask() */
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char * str_pinmask(uint16_t pins, char *buffer);
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/**
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* Spread packed port pins using a mask
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*
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* @param packed - packed bits, right-aligned (eg. 0b1111)
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* @param mask - positions of the bits (eg. 0x8803)
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* @return - bits spread to their positions (always counting from right)
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*/
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uint16_t port_spread(uint16_t packed, uint16_t mask);
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/**
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* Pack spread port pins using a mask
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*
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* @param spread - bits in a port register (eg. 0xFF02)
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* @param mask - mask of the bits we want to pack (eg. 0x8803)
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* @return - packed bits, right aligned (eg. 0b1110)
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*/
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uint16_t port_pack(uint16_t spread, uint16_t mask);
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/**
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* Set all GPIO resources held by unit to analog
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*
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* @param unit - holding unit
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*/
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void deinit_unit_pins(Unit *unit);
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error_t configure_gpio_alternate(char port_name, uint8_t pin_num, uint32_t af);
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error_t configure_sparse_pins(char port_name, uint16_t mask, GPIO_TypeDef **port_dest, uint32_t mode, uint32_t otype);
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#endif //GEX_PIN_UTILS_H
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