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77 lines
1.3 KiB
77 lines
1.3 KiB
/** @file voltmeter1.c
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@author M. P. Hayes, UCECE
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@date 1 February 2013
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@brief Simple message display program
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@defgroup voltmeter1 Simple voltmeter
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*/
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#include "system.h"
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#include "task.h"
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#include "tinygl.h"
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#include "adc.h"
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#include "../fonts/font3x5_1.h"
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/* Define polling rates in Hz. */
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#define DISPLAY_TASK_RATE 250
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#define ADC_TASK_RATE 1
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#define ADC_AIN 3
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static void adc_task_init (void)
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{
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adc_init ();
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adc_enable (ADC_AIN);
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}
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static void adc_task (__unused__ void *data)
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{
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uint8_t count;
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char str[3];
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count = adc_measure (ADC_AIN);
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str[0] = ((count / 10) % 10) + '0';
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str[1] = (count % 10) + '0';
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str[2] = 0;
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tinygl_text (str);
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}
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static void display_task_init (void)
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{
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tinygl_init (DISPLAY_TASK_RATE);
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tinygl_font_set (&font3x5_1);
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tinygl_text_mode_set (TINYGL_TEXT_MODE_STEP);
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tinygl_text_dir_set (TINYGL_TEXT_DIR_ROTATE);
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}
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static void display_task (__unused__ void *data)
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{
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tinygl_update ();
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}
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int main (void)
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{
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task_t tasks[] =
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{
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{.func = display_task, .period = TASK_RATE / DISPLAY_TASK_RATE},
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{.func = adc_task, .period = TASK_RATE / ADC_TASK_RATE},
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};
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system_init ();
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display_task_init ();
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adc_task_init ();
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task_schedule (tasks, ARRAY_SIZE (tasks));
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return 0;
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}
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