You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
50 lines
2.8 KiB
50 lines
2.8 KiB
#pragma once
|
|
|
|
/**
|
|
General purpose calculation and bit manipulation utilities.
|
|
*/
|
|
|
|
// if max, go to zero. Else increment. wrape = wrap exclusive
|
|
#define inc_wrap(var, min, max) do { if ((var) >= (max - 1)) { (var) = (min); } else { (var)++; } } while(0)
|
|
#define inc_wrapi(var, min, max) inc_wrap((var), (min), (max) + 1)
|
|
|
|
// If zero, go to max. Else decrement. wrape = wrap exclusive
|
|
#define dec_wrap(var, min, max) do { if ((var) > (min)) { (var)--; } else { (var) = (max) - 1; } } while(0)
|
|
#define dec_wrapi(var, min, max) dec_wrap((var), (min), (max) + 1)
|
|
|
|
// === general bit manipulation with register ===
|
|
#define sbi(reg, bit) do { (reg) |= (1 << (uint8_t)(bit)); } while(0)
|
|
#define cbi(reg, bit) do { (reg) &= ~(1 << (uint8_t)(bit)); } while(0)
|
|
|
|
#define read_bit(reg, bit) ((((uint8_t)(reg)) >> (uint8_t)(bit)) & 0x1)
|
|
#define get_bit(reg, bit) read_bit(reg, bit)
|
|
#define bit_is_high(reg, bit) read_bit(reg, bit)
|
|
#define bit_is_low(reg, bit) !read_bit(reg, bit)
|
|
// Can't use bit_is_set, as it's redefined in sfr_def.h
|
|
|
|
#define write_bit(reg, bit, value) do { (reg) = ((reg) & ~(1 << (uint8_t)(bit))) | (((uint8_t)(value) & 0x1) << (uint8_t)(bit)); } while(0)
|
|
#define set_bit(reg, bit, value) write_bit(reg, bit, value)
|
|
#define toggle_bit(reg, bit) do { (reg) ^= (1 << (uint8_t)(bit)); } while(0)
|
|
|
|
// general pin manipulation - with pointer to register
|
|
#define sbi_p(reg_p, bit) do { (*(reg_p)) |= (1 << (uint8_t)(bit)); } while(0)
|
|
#define cbi_p(reg_p, bit) do { (*(reg_p)) &= ~(1 << (uint8_t)(bit)); } while(0)
|
|
|
|
#define read_bit_p(reg_p, bit) ((*(reg_p) >> (uint8_t)(bit)) & 0x1)
|
|
#define get_bit_p(reg_p, bit) read_bit_p(reg_p, bit)
|
|
|
|
#define write_bit_p(reg_p, bit, value) do { *(reg_p) = (*(reg_p) & ~(1 << ((uint8_t)(bit) & 0x1))) | (((uint8_t)(value) & 0x1) << (uint8_t)(bit)); } while(0)
|
|
#define set_bit_p(reg, bit, value) write_bit_p(reg_p, bit, value)
|
|
#define toggle_bit_p(reg_p, bit) do { *(reg_p) ^= (1 << (uint8_t)(bit)); } while(0)
|
|
|
|
#define write_low_nibble(reg, value) do { (reg) = ((reg) & 0xF0) | ((uint8_t)(value) & 0xF); } while(0)
|
|
#define write_high_nibble(reg, value) do { (reg) = ((reg) & 0x0F) | (((uint8_t)(value) & 0xF) << 4); } while(0)
|
|
|
|
|
|
// Check if value is in range A..B or B..A
|
|
#define in_range(x, low, high) ((((low) < (high)) && ((x) >= (low) && (x) < (high))) || (((low) > (high)) && ((x) < (low) && (x) >= (high))))
|
|
#define in_rangei(x, low, high) ((((low) <= (high)) && ((x) >= (low) && (x) <= (high))) || (((low) > (high)) && ((x) <= (low) && (x) >= (high))))
|
|
|
|
// Check if value is in range A..B. If B < A, matches all outside B..A
|
|
#define in_range_wrap(x, low, high) ((((low) < (high)) && ((x) >= (low) && (x) < (high))) || (((low) > (high)) && ((x) >= (low) || (x) < (high))))
|
|
#define in_range_wrapi(x, low, high) ((((low) <= (high)) && ((x) >= (low) && (x) <= (high))) || (((low) > (high)) && ((x) >= (low) || (x) <= (high))))
|
|
|