Last Updated on 2026-03-10 by researcher
WEXはTCEからの出力にデッドタイムを挿入したモータードライブ回路などの信号を生成できる。ただ、CLKPER同期処理なので分解能が最低50ns単位なのがちょっと惜しいかも．．．
N-MOSのみで構成するハーフ・ブリッジ４回路(フル・ブリッジ２回路)までの駆動信号を生成できるがMicrochip社の回路例ではデッドタイムを自動調整するゲートドライバー(MIC4605)が使われてたりするのをみると、なんとなくだけどWEXのデッドタイム機能ってあまり実用的ではないのかなぁ．．．とも思ったり。
【サンプル】
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#include "avr8_tce.h" #include "avr8_wex.h" void sample(void) { Wex::begin(); Wex::deadtime(Wex::DTI0 | Wex::DTI1, 2, 1); Wex::output(Wex::WO0 | Wex::WO1); Tce::begin(100000, Tce::WGMODE_DSTOP); Tce::pwmduty(Tce::CMP0, Tce::PWM_MAX_COUNT >> 1); /* duty = 50% */ Tce::run(); } |
【ライブラリ】
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/* avr8_wex.h - WEX Driver for Microchip AVR8 Series Copyright (c) 2026 Sasapea's Lab. All right reserved. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #pragma once #include "avr8_config.h" #if defined(WEX0) class Wex { public: /* Dead time insertion */ typedef enum { DTI0 = WEX_DTI0EN_bm, DTI1 = WEX_DTI1EN_bm, DTI2 = WEX_DTI2EN_bm, DTI3 = WEX_DTI3EN_bm } DTI; /* Dead time swap */ typedef enum { SWAP0 = WEX_SWAP0_bm, SWAP1 = WEX_SWAP1_bm, SWAP2 = WEX_SWAP2_bm, SWAP3 = WEX_SWAP3_bm } SWAP; /* WEX Output WOn */ typedef enum { WO_OFF = 0, WO0 = 0x01, WO1 = 0x02, WO2 = 0x04, WO3 = 0x08, WO4 = 0x10, WO5 = 0x20, WO6 = 0x40, WO7 = 0x80, } WO; /* Event Control */ typedef enum { EVENTA, EVENTB, EVENTC, } EVENT; /* Input Matrix select */ typedef enum { INMX_DIRECT = WEX_INMX_DIRECT_gc, /* Direct from TCE0 */ INMX_CWCMA = WEX_INMX_CWCMA_gc, /* Common Waveform Channel Mode A. Single WO */ INMX_CWCMB = WEX_INMX_CWCMB_gc /* Common Waveform Channel Mode B. WO from two PWM channels */ } INMX; /* Update Source select */ typedef enum { UPDSRC_TCPWM0 = WEX_UPDSRC_TCPWM0_gc, /* Timer/Counter for PWM 0 update condition */ UPDSRC_SW = WEX_UPDSRC_SW_gc /* Software update only. No hardware update condition */ } UPDSRC; /* Blanking Prescaler select */ typedef enum { BLANKPRESC_DIV1 = WEX_BLANKPRESC_DIV1_gc, /* No prescaling */ BLANKPRESC_DIV4 = WEX_BLANKPRESC_DIV4_gc, /* Divide CLK_PER by 4 */ BLANKPRESC_DIV16 = WEX_BLANKPRESC_DIV16_gc, /* Divide CLK_PER by 16 */ BLANKPRESC_DIV64 = WEX_BLANKPRESC_DIV64_gc /* Divide CLK_PER by 64 */ } BLANKPRESC; /* Blanking State select */ typedef enum { BLANKSTATE_OFF = WEX_BLANKSTATE_OFF_gc, /* Blanking off */ BLANKSTATE_ON = WEX_BLANKSTATE_ON_gc /* Blanking active */ } BLANKSTATE; /* Blanking Trigger select */ typedef enum { BLANKTRIG_NONE = WEX_BLANKTRIG_NONE_gc, /* No HW trigger (Software only) */ BLANKTRIG_TCE0UPD = WEX_BLANKTRIG_TCE0UPD_gc, /* TCE0 Update Condition */ BLANKTRIG_TCE0CMP0 = WEX_BLANKTRIG_TCE0CMP0_gc, /* TCE0 Compare 0 */ BLANKTRIG_TCE0CMP1 = WEX_BLANKTRIG_TCE0CMP1_gc, /* TCE0 Compare 1 */ BLANKTRIG_TCE0CMP2 = WEX_BLANKTRIG_TCE0CMP2_gc, /* TCE0 Compare 2 */ BLANKTRIG_TCE0CMP3 = WEX_BLANKTRIG_TCE0CMP3_gc /* TCE0 Compare 3 */ } BLANKTRIG; /* Fault Detection Action select */ typedef enum { FDACT_NONE = WEX_FDACT_NONE_gc, /* None. Fault Protection Disabled */ FDACT_LOW = WEX_FDACT_LOW_gc, /* Drive all pins low */ FDACT_CUSTOM = WEX_FDACT_CUSTOM_gc /* Drive all pins to setting defined by FAULTDRV and FAULTVAL */ } FDACT; /* Fault Detection Restart Mode select */ typedef enum { FDMODE_LATCHED = WEX_FDMODE_LATCHED_gc, /* Latched Mode. Output will remain in fault state until fault condition is no longer active and FDF is cleared by SW. */ FDMODE_CBC = WEX_FDMODE_CBC_gc /* Cycle-by-cycle mode. Waveform output will remain in fault state until fault condition is no longer active. */ } FDMODE; /* Fault Detection on Debug Break Detection select */ typedef enum { FDDBD_FAULT = WEX_FDDBD_FAULT_gc, /* OCD Break request is treated as a fault if fault protection is enabled */ FDDBD_IGNORE = WEX_FDDBD_IGNORE_gc /* OCD Breask request will not trigger a fault */ } FDDBD; /* Fault Event Filter Enable select */ typedef enum { FILTER_ZERO = WEX_FILTER_ZERO_gc, /* No digital filter */ FILTER_SAMPLE1 = WEX_FILTER_SAMPLE1_gc, /* One Sample */ FILTER_SAMPLE2 = WEX_FILTER_SAMPLE2_gc, /* Two Samples */ FILTER_SAMPLE3 = WEX_FILTER_SAMPLE3_gc, /* Three Samples */ FILTER_SAMPLE4 = WEX_FILTER_SAMPLE4_gc, /* Four Samples */ FILTER_SAMPLE5 = WEX_FILTER_SAMPLE5_gc, /* Five Samples */ FILTER_SAMPLE6 = WEX_FILTER_SAMPLE6_gc, /* Six Samples */ FILTER_SAMPLE7 = WEX_FILTER_SAMPLE7_gc /* Seven Samples */ } FILTER; /* WEX.INTCTRL bit masks and bit positions */ typedef enum { INTCTRL_FAULTDET = WEX_FAULTDET_bm /* Fault Detection Interrupt Enable bit mask. */ } INTCTRL; /* WEX.INTFLAGS bit masks and bit positions */ typedef enum { INTFLAGS_FAULTDET = WEX_FAULTDET_bm, /* Fault Detection Interrupt Enable bit mask. */ INTFLAGS_FDFEVA = WEX_FDFEVA_bm, /* Fault Detection Flag Event Input A bit mask. */ INTFLAGS_FDFEVB = WEX_FDFEVB_bm, /* Fault Detection Flag Event Input B bit mask. */ INTFLAGS_FDFEVC = WEX_FDFEVC_bm /* Fault Detection Flag Event Input C bit mask. */ } INTFLAGS; /* WEX.STATUS bit masks and bit positions */ typedef enum { STATUS_FDSTATE = WEX_FDSTATE_bm, /* Fault Detection State bit mask. */ STATUS_FDSEVA = WEX_FDSEVA_bm, /* Fault Detection State Event A bit mask. */ STATUS_FDSEVB = WEX_FDSEVB_bm, /* Fault Detection State Event B bit mask. */ STATUS_FDSEVC = WEX_FDSEVC_bm, /* Fault Detection State Event C bit mask. */ STATUS_BLANKSTATE = WEX_BLANKSTATE_bm /* Blanking State bit mask. */ } STATUS; /* Type of Callback Function */ typedef void (*callback_t)(INTFLAGS flags); Wex(void) { } /* virtual */ ~Wex(void) { } static void begin(bool pgm = false, INMX inmx = INMX_DIRECT, UPDSRC updsrc = UPDSRC_TCPWM0) { end(); WEX0.CTRLA = inmx | (pgm ? WEX_PGM_bm : 0); WEX0.CTRLB = updsrc; WEX0.CTRLC = 0; WEX0.EVCTRLA = 0; WEX0.EVCTRLB = 0; WEX0.EVCTRLC = 0; WEX0.BUFCTRL = 0; WEX0.BLANKCTRL = 0; WEX0.BLANKTIME = 0; WEX0.FAULTCTRL = 0; WEX0.FAULTDRV = 0; WEX0.FAULTOUT = 0; WEX0.INTCTRL = 0; WEX0.INTFLAGS = 0xFF; WEX0.DTLS = 0; WEX0.DTHS = 0; WEX0.DTBOTH = 0; WEX0.SWAP = 0; WEX0.PGMOVR = 0; WEX0.PGMOUT = 0; WEX0.OUTOVEN = 0; _callback = 0; } static void end(void) { WEX0.CTRLA = 0; } static void deadtime(/* DTI */ uint8_t dti, uint8_t ls, uint8_t hs) { WEX0.CTRLA = (WEX0.CTRLA & ~(WEX_DTI3EN_bm | WEX_DTI2EN_bm | WEX_DTI1EN_bm | WEX_DTI0EN_bm)) | dti; WEX0.DTLS = ls; WEX0.DTHS = hs; } static void swap(/* SWAP */ uint8_t swap) { WEX0.SWAP = swap; } static void output(/* WO */ uint8_t ovr) { WEX0.OUTOVEN = ovr; } static void pgmovr(/* WO */ uint8_t ovr) { WEX0.PGMOVR = ovr; } static void pgmout(/* WO */ uint8_t out) { WEX0.PGMOUT = out; } static /* WO */ uint8_t pgmout(void) { return WEX0.PGMOUT; } static void fault(FDACT act = FDACT_LOW, FDMODE mode = FDMODE_LATCHED, FDDBD dbd = FDDBD_FAULT) { WEX0.FAULTCTRL = dbd | mode | act; } static void faultovr(/* WO */ uint8_t drv, /* WO */ uint8_t out) { WEX0.FAULTDRV = drv; WEX0.FAULTOUT = out; } static void evctrl(EVENT event, bool enable = true, bool blank = true, FILTER filter = FILTER_SAMPLE3) { (&WEX0.EVCTRLA)[event] = filter | (blank ? WEX_BLANK_bm : 0) | (enable ? WEX_FAULTEI_bm : 0); } static void blank(BLANKPRESC presc = BLANKPRESC_DIV1, BLANKTRIG trig = BLANKTRIG_TCE0UPD, uint8_t time = 3) { WEX0.BLANKCTRL = presc | trig; WEX0.BLANKTIME = time; } static STATUS status(void) { return (STATUS)WEX0.STATUS; } static void update(void) { command(CMD_UPDATE); } static void fault(bool set) { command(set ? CMD_FAULTSET : CMD_FAULTCLR); } static void blank(bool set) { command(set ? CMD_BLANKSET : CMD_BLANKCLR); } static void callback(callback_t func) { _callback = func; } static void interrupt(INTCTRL ctrl = INTCTRL_FAULTDET, bool enable = true) { if (enable) { WEX0.INTFLAGS = ctrl; #if CONFIG_WEX_ISR WEX0.INTCTRL |= ctrl; #endif } else { #if CONFIG_WEX_ISR WEX0.INTCTRL &= ~ctrl; #endif WEX0.INTFLAGS = ctrl; } } static void poll(void) { #if !CONFIG_WEX_ISR isr(); #endif } private: /* Command select */ typedef enum { CMD_NONE = WEX_CMD_NONE_gc, /* No Command */ CMD_UPDATE = WEX_CMD_UPDATE_gc, /* Force update of Dead-time, SWAP and PGM buffer registers. */ CMD_FAULTSET = WEX_CMD_FAULTSET_gc, /* Set Fault Detection */ CMD_FAULTCLR = WEX_CMD_FAULTCLR_gc, /* Clear Fault Detection */ CMD_BLANKSET = WEX_CMD_BLANKSET_gc, /* Set SW Blanking */ CMD_BLANKCLR = WEX_CMD_BLANKCLR_gc /* Clear SW Blanking */ } CMD; static callback_t _callback; #if CONFIG_WEX_ISR friend void wex_isr(void); #endif static inline void isr(void) { uint8_t flags = WEX0.INTFLAGS = WEX0.INTFLAGS; if (flags && _callback) _callback((INTFLAGS)flags); } static void command(CMD cmd = CMD_NONE) { WEX0.CTRLC = cmd; } }; #endif |
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/* avr8_wex.cpp - WEX Driver for Microchip AVR8 Series Copyright (c) 2026 Sasapea's Lab. All right reserved. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #include "avr8_wex.h" #if defined(WEX0) Wex::callback_t Wex::_callback; #if CONFIG_WEX_ISR inline void wex_isr(void) { Wex::isr(); } ISR(WEX0_FAULTDET_vect) { wex_isr(); } #endif #endif |
【関連投稿】
Microchip AVR8 用のライブラリを自作する。(GPIO)
Microchip AVR8 用のライブラリを自作する。(FUSE)
Microchip AVR8 用のライブラリを自作する。(CLOCK)
Microchip AVR8 用のライブラリを自作する。(RESET)
Microchip AVR8 用のライブラリを自作する。(PORTMUX)
Microchip AVR8 用のライブラリを自作する。(USART)
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Microchip AVR8 用のライブラリを自作する。(TCA)
Microchip AVR8 用のライブラリを自作する。(TCB)
Microchip AVR8 用のライブラリを自作する。(VREF)
Microchip AVR8 用のライブラリを自作する。(DAC)
Microchip AVR8 用のライブラリを自作する。(AC)
Microchip AVR8 用のライブラリを自作する。(ADC)
Microchip AVR8 用のライブラリを自作する。(ZCD)
Microchip AVR8 用のライブラリを自作する。(SPI)
Microchip AVR8 用のライブラリを自作する。(TWI)
Microchip AVR8 用のライブラリを自作する。(MAIN)
Microchip AVR8 用のライブラリを自作する。(CONFIG)
Microchip AVR8 用のライブラリを自作する。(ALARM)
Microchip AVR8 用のライブラリを自作する。(TASK)
Microchip AVR8 用のライブラリを自作する。(CCL)
Microchip AVR8 用のライブラリを自作する。(TCD)
Microchip AVR8 用のライブラリを自作する。(TCE)
Microchip AVR8 用のライブラリを自作する。(WEX)
Microchip AVR8 用のライブラリを自作する。(TCF)
Microchip AVR8 用のライブラリを自作する。(DOWNLOAD)