project/commands/cmd_pwm.c

   1 /**************************************************************************/
   2 /*!
   3     @file     cmd_sysinfo.c
   4     @author   K. Townsend (microBuilder.eu)
   5
   6     @brief    Code to execute for cmd_sysinfo in the 'core/cmd'
   7               command-line interpretter.
   8
   9     @section LICENSE
  10
  11     Software License Agreement (BSD License)
  12
  13     Copyright (c) 2010, microBuilder SARL
  14     All rights reserved.
  15
  16     Redistribution and use in source and binary forms, with or without
  17     modification, are permitted provided that the following conditions are met:
  18     1. Redistributions of source code must retain the above copyright
  19     notice, this list of conditions and the following disclaimer.
  20     2. Redistributions in binary form must reproduce the above copyright
  21     notice, this list of conditions and the following disclaimer in the
  22     documentation and/or other materials provided with the distribution.
  23     3. Neither the name of the copyright holders nor the
  24     names of its contributors may be used to endorse or promote products
  25     derived from this software without specific prior written permission.
  26
  27     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
  28     EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  29     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  30     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
  31     DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  32     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  33     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  34     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  35     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  36     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /**************************************************************************/
  39 #include <stdio.h>
  40
  41 #include "projectconfig.h"
  42 #include "core/cmd/cmd.h"
  43 #include "core/systick/systick.h"
  44 #include "core/iap/iap.h"
  45 #include "project/commands.h"       // Generic helper functions
  46 #include "core/pwm/pwm.h"
  47
  48 #ifdef CFG_PRINTF_UART
  49   #include "core/uart/uart.h"
  50 #endif
  51
  52 /**************************************************************************/
  53 /*!
  54     PWM command handler
  55 */
  56 /**************************************************************************/
  57 uint8_t pwmStarted = 0;
  58
  59 void cmd_pwm(uint8_t argc, char **argv) {
  60     int32_t frequencyTicks = 65535;
  61     int32_t dutyCycle = 25;
  62
  63     if(argc > 0) {
  64         getNumber (argv[0], &dutyCycle);
  65         if(dutyCycle < 1 || dutyCycle > 100) {
  66             printf("Invalid duty cycle. Duty cycle must be [1 .. 65535]%s", CFG_PRINTF_NEWLINE);
  67             return;
  68         }
  69
  70         if(argc > 1) {
  71             getNumber (argv[1], &frequencyTicks);
  72             if(frequencyTicks < 0 || frequencyTicks > 0xffff) {
  73                 printf("Invalid frequency. Frequency must be [1 .. 65535]%s", CFG_PRINTF_NEWLINE);
  74                 return;
  75             }
  76         } else {
  77             frequencyTicks = 65535;
  78         }
  79     } else {
  80         dutyCycle = 25;
  81
  82     }
  83
  84     if(! pwmStarted) {
  85         printf("Initializing PWM%s", CFG_PRINTF_NEWLINE);
  86         pwmInit();
  87     }
  88
  89     printf("Setting frequency ticks to %u%s", (uint16_t) frequencyTicks, CFG_PRINTF_NEWLINE);
  90     pwmSetFrequencyInTicks(frequencyTicks);
  91     printf("Setting duty cycle to %u%s", (uint16_t) dutyCycle, CFG_PRINTF_NEWLINE);
  92     pwmSetDutyCycle(dutyCycle);
  93     if(! pwmStarted) {
  94         pwmStart();
  95         pwmStarted = 1;
  96     }
  97 }