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add ledc and sigma-delta api
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‎cores/esp32/esp32-hal-ledc.c‎

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include"esp32-hal.h"
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#include"freertos/FreeRTOS.h"
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#include"freertos/task.h"
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#include"freertos/semphr.h"
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#include"rom/ets_sys.h"
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#include"esp32-hal-matrix.h"
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#include"soc/dport_reg.h"
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#include"soc/ledc_reg.h"
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#include"soc/ledc_struct.h"
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xSemaphoreHandle_ledc_sys_lock;
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#defineLEDC_MUTEX_LOCK() do{} while (xSemaphoreTake(_ledc_sys_lock, portMAX_DELAY) != pdPASS)
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#defineLEDC_MUTEX_UNLOCK() xSemaphoreGive(_ledc_sys_lock)
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/*
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* LEDC Chan to Group/Channel/Timer Mapping
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** ledc: 0 => Group: 0, Channel: 0, Timer: 0
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** ledc: 1 => Group: 0, Channel: 1, Timer: 0
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** ledc: 2 => Group: 0, Channel: 2, Timer: 1
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** ledc: 3 => Group: 0, Channel: 3, Timer: 1
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** ledc: 4 => Group: 0, Channel: 4, Timer: 2
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** ledc: 5 => Group: 0, Channel: 5, Timer: 2
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** ledc: 6 => Group: 0, Channel: 6, Timer: 3
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** ledc: 7 => Group: 0, Channel: 7, Timer: 3
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** ledc: 8 => Group: 1, Channel: 0, Timer: 0
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** ledc: 9 => Group: 1, Channel: 1, Timer: 0
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** ledc: 10 => Group: 1, Channel: 2, Timer: 1
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** ledc: 11 => Group: 1, Channel: 3, Timer: 1
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** ledc: 12 => Group: 1, Channel: 4, Timer: 2
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** ledc: 13 => Group: 1, Channel: 5, Timer: 2
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** ledc: 14 => Group: 1, Channel: 6, Timer: 3
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** ledc: 15 => Group: 1, Channel: 7, Timer: 3
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*/
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//uint32_t frequency = (80MHz or 1MHz)/((div_num / 256.0)*(1 << bit_num));
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voidledcSetupTimer(uint8_tchan, uint32_tdiv_num, uint8_tbit_num, boolapb_clk)
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{
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ledc_dev_t*ledc_dev= (volatileledc_dev_t*)(DR_REG_LEDC_BASE);
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uint8_tgroup=(chan/8), timer=((chan/2)%4);
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staticbooltHasStarted= false;
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if(!tHasStarted){
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tHasStarted= true;
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SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_LEDC_CLK_EN);
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CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_LEDC_RST);
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ledc_dev->conf.apb_clk_sel=1;//LS use apb clock
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_ledc_sys_lock=xSemaphoreCreateMutex();
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}
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LEDC_MUTEX_LOCK();
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ledc_dev->timer_group[group].timer[timer].conf.div_num=div_num;//18 bit (10.8) This register is used to configure parameter for divider in timer the least significant eight bits represent the decimal part.
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ledc_dev->timer_group[group].timer[timer].conf.bit_num=bit_num;//5 bit This register controls the range of the counter in timer. the counter range is [0 2**bit_num] the max bit width for counter is 20.
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ledc_dev->timer_group[group].timer[timer].conf.tick_sel=apb_clk;//apb clock
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if(group){
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ledc_dev->timer_group[group].timer[timer].conf.low_speed_update=1;//This bit is only useful for low speed timer channels, reserved for high speed timers
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}
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ledc_dev->timer_group[group].timer[timer].conf.pause=0;
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ledc_dev->timer_group[group].timer[timer].conf.rst=1;//This bit is used to reset timer the counter will be 0 after reset.
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ledc_dev->timer_group[group].timer[timer].conf.rst=0;
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LEDC_MUTEX_UNLOCK();
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}
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uint32_tledcSetupTimerFreq(uint8_tchan, uint32_tfreq, uint8_tbit_num)
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{
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uint64_tclk_freq=APB_CLK_FREQ;
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clk_freq <<= 8;//div_num is 8 bit decimal
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uint32_tdiv_num= (clk_freq >> bit_num) / freq;
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boolapb_clk= true;
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if(div_num>LEDC_DIV_NUM_HSTIMER0_V){
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clk_freq /= 80;
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div_num= (clk_freq >> bit_num) / freq;
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if(div_num>LEDC_DIV_NUM_HSTIMER0_V){
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div_num=LEDC_DIV_NUM_HSTIMER0_V;//lowest clock possible
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}
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apb_clk= false;
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} elseif(div_num<256){
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div_num=256;//highest clock possible
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}
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ledcSetupTimer(chan, div_num, bit_num, apb_clk);
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return (clk_freq >> bit_num) / div_num;
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}
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voidledcSetupChannel(uint8_tchan, uint8_tidle_level)
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{
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uint8_tgroup=(chan/8), channel=(chan%8), timer=((chan/2)%4);
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ledc_dev_t*ledc_dev= (volatileledc_dev_t*)(DR_REG_LEDC_BASE);
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LEDC_MUTEX_LOCK();
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ledc_dev->channel_group[group].channel[channel].conf0.timer_sel=timer;//2 bit Selects the timer to attach 0-3
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ledc_dev->channel_group[group].channel[channel].conf0.idle_lv=idle_level;//1 bit This bit is used to control the output value when channel is off.
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ledc_dev->channel_group[group].channel[channel].hpoint.hpoint=0;//20 bit The output value changes to high when timer selected by channel has reached hpoint
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ledc_dev->channel_group[group].channel[channel].conf1.duty_inc=1;//1 bit This register is used to increase the duty of output signal or decrease the duty of output signal for high speed channel
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ledc_dev->channel_group[group].channel[channel].conf1.duty_num=1;//10 bit This register is used to control the number of increased or decreased times for channel
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ledc_dev->channel_group[group].channel[channel].conf1.duty_cycle=1;//10 bit This register is used to increase or decrease the duty every duty_cycle cycles for channel
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ledc_dev->channel_group[group].channel[channel].conf1.duty_scale=0;//10 bit This register controls the increase or decrease step scale for channel.
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ledc_dev->channel_group[group].channel[channel].duty.duty=0;
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ledc_dev->channel_group[group].channel[channel].conf0.sig_out_en=0;//This is the output enable control bit for channel
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ledc_dev->channel_group[group].channel[channel].conf1.duty_start=0;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
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if(group){
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ledc_dev->channel_group[group].channel[channel].conf0.val &= ~BIT(4);
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} else{
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ledc_dev->channel_group[group].channel[channel].conf0.clk_en=0;
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}
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LEDC_MUTEX_UNLOCK();
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}
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uint32_tledcSetup(uint8_tchan, uint32_tfreq, uint8_tbit_num)
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{
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if(chan>15){
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return0;
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}
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uint32_tres_freq=ledcSetupTimerFreq(chan, freq, bit_num);
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ledcSetupChannel(chan, LOW);
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returnres_freq;
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}
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voidledcWrite(uint8_tchan, uint32_tduty)
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{
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if(chan>15){
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return;
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}
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uint8_tgroup=(chan/8), channel=(chan%8);
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ledc_dev_t*ledc_dev= (volatileledc_dev_t*)(DR_REG_LEDC_BASE);
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LEDC_MUTEX_LOCK();
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ledc_dev->channel_group[group].channel[channel].duty.duty=duty << 4;//25 bit (21.4)
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if(duty){
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ledc_dev->channel_group[group].channel[channel].conf0.sig_out_en=1;//This is the output enable control bit for channel
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ledc_dev->channel_group[group].channel[channel].conf1.duty_start=1;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
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if(group){
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ledc_dev->channel_group[group].channel[channel].conf0.val |= BIT(4);
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} else{
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ledc_dev->channel_group[group].channel[channel].conf0.clk_en=1;
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}
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} else{
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ledc_dev->channel_group[group].channel[channel].conf0.sig_out_en=0;//This is the output enable control bit for channel
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ledc_dev->channel_group[group].channel[channel].conf1.duty_start=0;//When duty_num duty_cycle and duty_scale has been configured. these register won't take effect until set duty_start. this bit is automatically cleared by hardware.
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if(group){
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ledc_dev->channel_group[group].channel[channel].conf0.val &= ~BIT(4);
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} else{
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ledc_dev->channel_group[group].channel[channel].conf0.clk_en=0;
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}
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}
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LEDC_MUTEX_UNLOCK();
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}
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uint32_tledcRead(uint8_tchan)
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{
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if(chan>15){
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return0;
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}
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ledc_dev_t*ledc_dev= (volatileledc_dev_t*)(DR_REG_LEDC_BASE);
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returnledc_dev->channel_group[chan/8].channel[chan%8].duty.duty >> 4;
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}
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voidledcAttachPin(uint8_tpin, uint8_tchan)
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{
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if(chan>15){
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return;
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}
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pinMode(pin, OUTPUT);
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pinMatrixOutAttach(pin, ((chan/8)?LEDC_LS_SIG_OUT0_IDX:LEDC_HS_SIG_OUT0_IDX) + (chan%8), false, false);
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}
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voidledcDetachPin(uint8_tpin)
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{
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pinMatrixOutDetach(pin, false, false);
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}

‎cores/esp32/esp32-hal-ledc.h‎

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef_ESP32_HAL_LEDC_H_
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#define_ESP32_HAL_LEDC_H_
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#ifdef__cplusplus
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extern"C"{
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#endif
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#include<stdint.h>
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#include<stdbool.h>
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//channel 0-15 resolution 1-16bits freq limits depend on resolution
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uint32_tledcSetup(uint8_tchannel, uint32_tfreq, uint8_tresolution_bits);
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voidledcWrite(uint8_tchannel, uint32_tduty);
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uint32_tledcRead(uint8_tchannel);
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voidledcAttachPin(uint8_tpin, uint8_tchannel);
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voidledcDetachPin(uint8_tpin);
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#ifdef__cplusplus
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}
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#endif
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#endif/* _ESP32_HAL_LEDC_H_ */

‎cores/esp32/esp32-hal-sd.c‎

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include"esp32-hal.h"
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#include"freertos/FreeRTOS.h"
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#include"freertos/task.h"
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#include"freertos/semphr.h"
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#include"rom/ets_sys.h"
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#include"esp32-hal-matrix.h"
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#include"soc/gpio_sd_reg.h"
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#include"soc/gpio_sd_struct.h"
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xSemaphoreHandle_sd_sys_lock;
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#defineSD_MUTEX_LOCK() do{} while (xSemaphoreTake(_sd_sys_lock, portMAX_DELAY) != pdPASS)
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#defineSD_MUTEX_UNLOCK() xSemaphoreGive(_sd_sys_lock)
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uint32_tsdSetup(uint8_tchannel, uint32_tfreq) //chan 0-7 freq 1220-312500
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{
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if(channel>7){
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return0;
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}
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staticbooltHasStarted= false;
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if(!tHasStarted){
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tHasStarted= true;
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_sd_sys_lock=xSemaphoreCreateMutex();
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}
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gpio_sd_dev_t*gpio_sd_dev= (volatilegpio_sd_dev_t*)(DR_REG_GPIO_SD_BASE);
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uint32_tprescale= (10000000/(freq*32)) -1;
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if(prescale>0xFF){
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prescale=0xFF;
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}
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SD_MUTEX_LOCK();
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gpio_sd_dev->channel[channel].prescale=prescale;
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gpio_sd_dev->cg.clk_en=0;
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gpio_sd_dev->cg.clk_en=1;
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SD_MUTEX_UNLOCK();
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return10000000/((prescale+1) *32);
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}
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voidsdWrite(uint8_tchannel, uint8_tduty) //chan 0-7 duty 8 bit
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{
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if(channel>7){
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return;
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}
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duty+=128;
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gpio_sd_dev_t*gpio_sd_dev= (volatilegpio_sd_dev_t*)(DR_REG_GPIO_SD_BASE);
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SD_MUTEX_LOCK();
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gpio_sd_dev->channel[channel].duty=duty;
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SD_MUTEX_UNLOCK();
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}
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uint8_tsdRead(uint8_tchannel) //chan 0-7
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{
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if(channel>7){
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return0;
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}
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gpio_sd_dev_t*gpio_sd_dev= (volatilegpio_sd_dev_t*)(DR_REG_GPIO_SD_BASE);
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returngpio_sd_dev->channel[channel].duty-128;
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}
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voidsdAttachPin(uint8_tpin, uint8_tchannel) //channel 0-7
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{
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if(channel>7){
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return;
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}
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pinMode(pin, OUTPUT);
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pinMatrixOutAttach(pin, GPIO_SD0_OUT_IDX+channel, false, false);
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}
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voidsdDetachPin(uint8_tpin)
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{
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pinMatrixOutDetach(pin, false, false);
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}

‎cores/esp32/esp32-hal-sd.h‎

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// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef_ESP32_HAL_SD_H_
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#define_ESP32_HAL_SD_H_
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#ifdef__cplusplus
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extern"C"{
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#endif
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#include<stdint.h>
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#include<stdbool.h>
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//channel 0-7 freq 1220-312500 duty 0-255
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uint32_tsdSetup(uint8_tchannel, uint32_tfreq);
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voidsdWrite(uint8_tchannel, uint8_tduty);
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uint8_tsdRead(uint8_tchannel);
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voidsdAttachPin(uint8_tpin, uint8_tchannel);
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voidsdDetachPin(uint8_tpin);
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#ifdef__cplusplus
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}
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#endif
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#endif/* _ESP32_HAL_SD_H_ */

‎cores/esp32/esp32-hal.h‎

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#include"esp32-hal-gpio.h"
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#include"esp32-hal-spi.h"
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#include"esp32-hal-i2c.h"
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#include"esp32-hal-ledc.h"
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#include"esp32-hal-sd.h"
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#include"esp_system.h"
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uint32_tmicros();

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