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gex-core/platform/pin_utils.h

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