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feat(pwm): update pwm lib for release/v2.xx

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1. Add API to stop PWM.
    2. Add API to set the phase of each PWM channel.
    3. Add pwm example.
This commit is contained in:
kooho
2018-05-24 15:30:06 +08:00
committed by hou wen xiang
parent 581aec0631
commit c905a09a24
9 changed files with 908 additions and 73 deletions
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144
examples/pwm_test/user/user_main.c Normal file
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/*
* ESPRESSIF MIT License
*
* Copyright (c) 2015 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
*
* Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP8266 only, in which case,
* it is free of charge, to any person obtaining a copy of this software and associated
* documentation files (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#include "esp_common.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "pwm.h"
#define PWM_0_OUT_IO_MUX PERIPHS_IO_MUX_MTDI_U
#define PWM_0_OUT_IO_NUM 12
#define PWM_0_OUT_IO_FUNC FUNC_GPIO12
#define PWM_1_OUT_IO_MUX PERIPHS_IO_MUX_MTCK_U
#define PWM_1_OUT_IO_NUM 13
#define PWM_1_OUT_IO_FUNC FUNC_GPIO13
#define PWM_2_OUT_IO_MUX PERIPHS_IO_MUX_MTMS_U
#define PWM_2_OUT_IO_NUM 14
#define PWM_2_OUT_IO_FUNC FUNC_GPIO14
#define PWM_3_OUT_IO_MUX PERIPHS_IO_MUX_MTDO_U
#define PWM_3_OUT_IO_NUM 15
#define PWM_3_OUT_IO_FUNC FUNC_GPIO15
//PWM period 500us(2Khz)
#define PWM_PERIOD (500)
/******************************************************************************
* FunctionName : user_rf_cal_sector_set
* Description : SDK just reversed 4 sectors, used for rf init data and paramters.
* We add this function to force users to set rf cal sector, since
* we don't know which sector is free in user's application.
* sector map for last several sectors : ABCCC
* A : rf cal
* B : rf init data
* C : sdk parameters
* Parameters : none
* Returns : rf cal sector
*******************************************************************************/
uint32 user_rf_cal_sector_set(void)
{
flash_size_map size_map = system_get_flash_size_map();
uint32 rf_cal_sec = 0;
switch (size_map) {
case FLASH_SIZE_4M_MAP_256_256:
rf_cal_sec = 128 - 5;
break;
case FLASH_SIZE_8M_MAP_512_512:
rf_cal_sec = 256 - 5;
break;
case FLASH_SIZE_16M_MAP_512_512:
case FLASH_SIZE_16M_MAP_1024_1024:
rf_cal_sec = 512 - 5;
break;
case FLASH_SIZE_32M_MAP_512_512:
case FLASH_SIZE_32M_MAP_1024_1024:
rf_cal_sec = 1024 - 5;
break;
case FLASH_SIZE_64M_MAP_1024_1024:
rf_cal_sec = 2048 - 5;
break;
case FLASH_SIZE_128M_MAP_1024_1024:
rf_cal_sec = 4096 - 5;
break;
default:
rf_cal_sec = 0;
break;
}
return rf_cal_sec;
}
/******************************************************************************
* FunctionName : user_init
* Description : entry of user application, init user function here
* Parameters : none
* Returns : none
*******************************************************************************/
//pwm out_put io
uint32 io_info[][3] = {
{ PWM_0_OUT_IO_MUX, PWM_0_OUT_IO_FUNC, PWM_0_OUT_IO_NUM },
{ PWM_1_OUT_IO_MUX, PWM_1_OUT_IO_FUNC, PWM_1_OUT_IO_NUM },
{ PWM_2_OUT_IO_MUX, PWM_2_OUT_IO_FUNC, PWM_2_OUT_IO_NUM },
{ PWM_3_OUT_IO_MUX, PWM_3_OUT_IO_FUNC, PWM_3_OUT_IO_NUM },
};
//dutys table
uint32 dutys[][4] = {
{250, 250, 250, 250},
};
//phase table
int phase[][4] = {
{0, 0, 50, -50},
};
void user_init(void)
{
printf("SDK version:%s\n", system_get_sdk_version());
pwm_init(PWM_PERIOD, dutys[0], 4, io_info);
pwm_set_channel_reverse(0x1<<0);
pwm_set_phases(phase[0]);
pwm_start();
int count = 0;
while(1) {
if(count == 20) {
//channel0, 1 output hight level.
//channel2, 3 output low level.
pwm_stop(0x3);
printf("PWM stop\n");
} else if(count == 30){
pwm_start();
printf("PWM re-start\n");
count = 0;
}
count++;
vTaskDelay(1000 / portTICK_RATE_MS);
}
}