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 */
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 */
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#include "stm32l1xx_hal.h"
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#include "stm32l1xx_hal.h"
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#include "ap_math.h"
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#include "ap_math.h"
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#include "font.h"
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#include "font.h"
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#include "SSD1306.h"
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#include "SSD1306.h"
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#include "dials.h"
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// this is the number of degrees between top centre of scale and
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// left or right hand end of scale : 90 degrees produces a semicircle.
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static uint16_t a1 = 90;
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static uint16_t a1 = 90;
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static uint8_t xo = 64;
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static uint8_t xo = 64;
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static uint8_t yo = 64;
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static uint8_t yo = 64;
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static uint8_t siz = 32;
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static uint8_t siz = 32;
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/* percent is integer from 0 to 100 */
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/* position is integer from 0 to SINE_STEPS */
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void
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void
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dial_draw_needle (uint16_t percent)
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dial_draw_needle (uint16_t position)
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{
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{
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  int ang = SINE_SCALING * ((percent - 50) * a1) / 50;
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  int ang = SINE_SCALING * ((position - (SINE_STEPS/2)) * a1) / (SINE_STEPS/2);
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  int si = ap_sin (ang);
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  int si = ap_sin (ang);
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  int co = ap_cos (ang);
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  int co = ap_cos (ang);
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  /* calculate a shift for a second side of the needle */
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  /* calculate a shift for a second side of the needle */