MAA version 0.2.0 moves to a standard C API
* Removed all C++ code and renamed all .cxx extensions to .c * All functions are renamed to maa_ and modules are for example called maa_pwm * Cmake can now 'make doc' using a Doxyfile.in to create documentation * examples/ have been updated but swig generated API is untested Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Brendan Le Foll
202
src/pwm/pwm.c
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202
src/pwm/pwm.c
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/*
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* Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include "pwm.h"
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static int
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maa_pwm_setup_duty_fp(pwm_t* dev)
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{
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char bu[64];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/duty_cycle", dev->chipid, dev->pin);
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if ((dev->duty_fp = fopen(bu, "r+b")) == NULL) {
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return 1;
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}
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return 0;
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}
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static void
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maa_pwm_write_period(pwm_t* dev, int period)
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{
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FILE *period_f;
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char bu[64];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/period", dev->chipid, dev->pin);
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if ((period_f = fopen(bu, "r+b")) == NULL) {
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fprintf(stderr, "Failed to open period for writing!\n");
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}
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fprintf(period_f, "%d", period);
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fclose(period_f);
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}
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static void
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maa_pwm_write_duty(pwm_t* dev, int duty)
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{
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if (dev->duty_fp == NULL) {
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maa_pwm_setup_duty_fp(dev);
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}
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fprintf(dev->duty_fp, "%d", duty);
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rewind(dev->duty_fp);
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fflush(dev->duty_fp);
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}
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static int
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maa_pwm_get_period(pwm_t* dev)
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{
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FILE *period_f;
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char bu[64];
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char output[16];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/period", dev->chipid, dev->pin);
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if ((period_f = fopen(bu, "rb")) == NULL) {
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fprintf(stderr, "Failed to open period for reading!\n");
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return 0;
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}
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fgets(output, 16, period_f);
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fclose(period_f);
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return atoi(output);
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}
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static int
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maa_pwm_get_duty(pwm_t* dev)
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{
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if (dev->duty_fp == NULL) {
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maa_pwm_setup_duty_fp(dev);
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}
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char output[16];
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fgets(output, 16, dev->duty_fp);
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fseek(dev->duty_fp, SEEK_SET, 0);
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return atoi(output);
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}
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int
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maa_pwm_init(pwm_t* dev, int chipin, int pin)
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{
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dev = malloc(sizeof *dev);
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dev->chipid = chipin;
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dev->pin = pin;
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FILE *export_f;
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char buffer[64];
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snprintf(buffer, 64, "/sys/class/pwm/pwmchip%d/export", dev->chipid);
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if ((export_f = fopen(buffer, "w")) == NULL) {
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fprintf(stderr, "Failed to open export for writing!\n");
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} else {
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fprintf(export_f, "%d", dev->pin);
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fclose(export_f);
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maa_pwm_setup_duty_fp(dev);
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}
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return 0;
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}
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void
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maa_pwm_write(pwm_t* dev, float percentage)
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{
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maa_pwm_write_duty(dev, percentage * maa_pwm_get_period(dev));
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}
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float
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maa_pwm_read(pwm_t* dev)
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{
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float output = maa_pwm_get_duty(dev) / (float) maa_pwm_get_period(dev);
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return output;
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}
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void
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maa_pwm_period(pwm_t* dev, float seconds)
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{
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maa_pwm_period_ms(dev, seconds*1000);
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}
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void
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maa_pwm_period_ms(pwm_t* dev, int ms)
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{
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maa_pwm_period_us(dev, ms*1000);
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}
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void
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maa_pwm_period_us(pwm_t* dev, int us)
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{
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maa_pwm_write_period(dev, us*1000);
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}
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void
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maa_pwm_pulsewidth(pwm_t* dev, float seconds)
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{
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maa_pwm_pulsewidth_ms(dev, seconds*1000);
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}
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void
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maa_pwm_pulsewidth_ms(pwm_t* dev, int ms)
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{
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maa_pwm_pulsewidth_us(dev, ms*1000);
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}
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void
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maa_pwm_pulsewidth_us(pwm_t* dev, int us)
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{
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maa_pwm_write_duty(dev, us*1000);
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}
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void
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maa_pwm_enable(pwm_t* dev, int enable)
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{
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int status;
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if (enable != 0) {
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status = 1;
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} else {
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status = enable;
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}
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FILE *enable_f;
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char bu[64];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/enable", dev->chipid, dev->pin);
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if ((enable_f = fopen(bu, "w")) == NULL) {
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fprintf(stderr, "Failed to open export for writing!\n");
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} else {
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fprintf(enable_f, "%d", status);
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fclose(enable_f);
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}
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//Do Something
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}
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void
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maa_pwm_close(pwm_t* dev)
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{
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maa_pwm_enable(dev, 0);
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FILE *unexport_f;
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char buffer[64];
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snprintf(buffer, 64, "/sys/class/pwm/pwmchip%d/unexport", dev->chipid);
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if ((unexport_f = fopen(buffer, "w")) == NULL) {
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fprintf(stderr, "Failed to open unexport for writing!\n");
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} else {
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fprintf(unexport_f, "%d", dev->pin);
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fclose(unexport_f);
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}
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free(dev);
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}
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204
src/pwm/pwm.cxx
204
src/pwm/pwm.cxx
@@ -1,204 +0,0 @@
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/*
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* Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include "pwm.h"
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using namespace maa;
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PWM::PWM(int chipin, int pinin)
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{
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chipid = chipin;
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pin = pinin;
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FILE *export_f;
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char buffer[64];
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snprintf(buffer, 64, "/sys/class/pwm/pwmchip%d/export", chipid);
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if((export_f = fopen(buffer, "w")) == NULL) {
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fprintf(stderr, "Failed to open export for writing!\n");
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} else {
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fprintf(export_f, "%d", pin);
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fclose(export_f);
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setup_duty_fp();
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}
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}
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void
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PWM::write(float percentage)
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{
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write_duty(percentage*get_period());
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}
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float
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PWM::read()
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{
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float output = get_duty() / (float) get_period();
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return output;
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}
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void
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PWM::period(float seconds)
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{
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period_ms(seconds*1000);
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}
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void
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PWM::period_ms(int ms)
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{
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period_us(ms*1000);
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}
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void
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PWM::period_us(int us)
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{
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write_period(us*1000);
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}
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void
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PWM::pulsewidth(float seconds)
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{
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pulsewidth_ms(seconds*1000);
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}
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void
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PWM::pulsewidth_ms(int ms)
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{
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pulsewidth_us(ms*1000);
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}
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void
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PWM::pulsewidth_us(int us)
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{
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write_duty(us*1000);
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}
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void
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PWM::enable(int enable)
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{
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int status;
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if(enable != 0) {
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status = 1;
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} else {
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status = enable;
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}
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FILE *enable_f;
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char bu[64];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/enable", chipid, pin);
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if((enable_f = fopen(bu, "w")) == NULL) {
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fprintf(stderr, "Failed to open export for writing!\n");
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} else {
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fprintf(enable_f, "%d", status);
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fclose(enable_f);
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}
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//Do Something
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}
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void
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PWM::close()
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{
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enable(0);
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FILE *unexport_f;
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char buffer[64];
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snprintf(buffer, 64, "/sys/class/pwm/pwmchip%d/unexport", chipid);
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if((unexport_f = fopen(buffer, "w")) == NULL) {
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fprintf(stderr, "Failed to open unexport for writing!\n");
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} else {
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fprintf(unexport_f, "%d", pin);
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fclose(unexport_f);
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}
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}
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void
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PWM::write_period(int period)
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{
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FILE *period_f;
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char bu[64];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/period", chipid, pin);
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if((period_f = fopen(bu, "r+b")) == NULL) {
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fprintf(stderr, "Failed to open period for writing!\n");
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} else {
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fprintf(period_f, "%d", period);
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fclose(period_f);
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}
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}
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void
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PWM::write_duty(int duty)
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{
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if(duty_fp == NULL) {
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setup_duty_fp();
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}
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fprintf(duty_fp, "%d", duty);
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rewind(duty_fp);
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fflush(duty_fp);
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}
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int
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PWM::setup_duty_fp()
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{
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char bu[64];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/duty_cycle", chipid, pin);
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if((duty_fp = fopen(bu, "r+b")) == NULL) {
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return 1;
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} else {
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return 0;
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}
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return 1;
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}
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int
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PWM::get_period()
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{
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FILE *period_f;
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char bu[64];
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char output[16];
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sprintf(bu, "/sys/class/pwm/pwmchip%d/pwm%d/period", chipid, pin);
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if((period_f = fopen(bu, "rb")) == NULL) {
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fprintf(stderr, "Failed to open period for reading!\n");
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return 0;
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} else {
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fgets(output, 16, period_f);
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fclose(period_f);
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return atoi(output);
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}
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}
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int
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PWM::get_duty()
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{
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if(duty_fp == NULL) {
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setup_duty_fp();
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}
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char output[16];
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fgets(output, 16, duty_fp);
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fseek(duty_fp, SEEK_SET, 0);
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return atoi(output);
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}
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