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scope.c
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/*
* Copyright (c) 2019-2020, Alex Taradov <alex@taradov.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*- Includes ----------------------------------------------------------------*/
#include <stdint.h>
#include <stdbool.h>
#include "gd32f4xx.h"
#include "hal_gpio.h"
#include "utils.h"
#include "lcd.h"
#include "timer.h"
#include "images.h"
#include "common.h"
#include "config.h"
#include "buttons.h"
#include "capture.h"
#include "scope.h"
/*- Definitions -------------------------------------------------------------*/
#define ZERO_POINT 0x80
#define GRID_CENTER_X 160
#define GRID_CENTER_Y 120
#define GRID_LEFT 10
#define GRID_RIGHT 310
#define GRID_TOP 20
#define GRID_BOTTOM 220
#define GRID_WIDTH 300
#define GRID_HEIGHT 200
#define GRID_DIV_PX 25
#define GRID_DIVS_H 12
#define GRID_DIVS_V 10
#define STATUS_LINE_Y 223
#define STATUS_LINE_HEIGHT 16
#define MINIVIEW_WIDTH 160
#define CALIB_AREA_LEFT 140
#define CALIB_AREA_WIDTH (LCD_WIDTH - CALIB_AREA_LEFT)
#define MAX_SAMPLE_RATE_LIMIT 13
#define TOAST_TIMEOUT 1500
#define TOAST_COLOR LCD_COLOR(255, 255, 0)
#define WAIT_STATE_HOLDOFF 100
#define BG_COLOR LCD_COLOR(0, 0, 0)
#define TRACE_COLOR LCD_COLOR(255, 255, 0)
#define TRACE_FILLED_COLOR LCD_COLOR(0, 255, 0)
#define TRACE_CLIP_COLOR LCD_COLOR(255, 0, 0)
#define TRACE_INVALID_COLOR LCD_COLOR(255, 0, 0)
#define GRID_BG_COLOR LCD_COLOR(0, 0, 0)
#define GRID_FG_COLOR LCD_COLOR(200, 200, 200)
#define MV_FRAME_COLOR LCD_COLOR(230, 230, 230)
#define HSCALE_COLOR LCD_COLOR(255, 255, 255)
#define HPOS_COLOR LCD_COLOR(255, 180, 50)
#define VSCALE_COLOR LCD_COLOR(255, 255, 0)
#define TRIGGER_LEVEL_COLOR LCD_COLOR(50, 255, 255)
#define TRIGGER_MODE_COLOR LCD_COLOR(0, 255, 0)
#define CAPTURE_STOP_COLOR LCD_COLOR(255, 0, 0)
#define CAPTURE_WAIT_COLOR LCD_COLOR(255, 180, 50)
#define CAPTURE_TRIG_COLOR LCD_COLOR(0, 255, 0)
#define SR_LIMIT_COLOR LCD_COLOR(250, 50, 50)
#define SR_COLOR LCD_COLOR(0, 230, 0)
#define MIN_TRIGGER_LEVEL -100 // px
#define MAX_TRIGGER_LEVEL 100 // px
#define MIN_HORIZONTAL_POSITION -2000000000 // 2 seconds
#define MAX_HORIZONTAL_POSITION 2000000000 // 2 seconds
#define MIN_VERTICAL_POSITION (-10 * GRID_DIV_PX)
#define MAX_VERTICAL_POSITION ( 10 * GRID_DIV_PX)
enum
{
CALIB_ZERO,
CALIB_DELTA,
CALIB_SCALE,
CALIB_OFFSET,
};
/*- Types -------------------------------------------------------------------*/
typedef struct
{
uint8_t min[GRID_WIDTH];
uint8_t max[GRID_WIDTH];
uint8_t flags[GRID_WIDTH];
} DisplayBuffer;
/*- Constants ---------------------------------------------------------------*/
static const char *hs_str[HS_COUNT] =
{
" 50\x01ns", // ns
"100\x01ns", "200\x01ns", "500\x01ns",
" 1\x01us", " 2\x01us", " 5\x01us", // us
" 10\x01us", " 20\x01us", " 50\x01us",
"100\x01us", "200\x01us", "500\x01us",
" 1\x01ms", " 2\x01ms", " 5\x01ms", // ms
" 10\x01ms", " 20\x01ms", " 50\x01ms",
"100\x01ms", "200\x01ms", "500\x01ms",
};
static const int hs_div_value[HS_COUNT] =
{
50, 100, 200, 500, // ns
1000, 2000, 5000, 10000, 20000, 50000, 100000, 200000, 500000, // us
1000000, 2000000, 5000000, 10000000, 20000000, 50000000, 100000000, 200000000, 500000000, // ms
};
static const int hs_px_value[HS_COUNT] = // in ns
{
2, 4, 8, 20, // ns
40, 80, 200, 400, 800, 2000, 4000, 8000, 20000, // us
40000, 80000, 200000, 400000, 800000, 2000000, 4000000, 8000000, 20000000, // ms
};
static const char *vs_str[VS_COUNT] =
{
" 50\x01mV", "100\x01mV", "200\x01mV", "500\x01mV", " 1\x01V ", " 2\x01V ", " 5\x01V ", " 10\x01V ",
};
static const int vs_px_value[VS_COUNT] =
{
2, 4, 8, 20, 40, 80, 200, 400,
};
/*- Variables ---------------------------------------------------------------*/
static uint16_t *g_grid_data[GRID_WIDTH];
static uint16_t g_grid_column_0[240];
static uint16_t g_grid_column_1[240];
static uint16_t g_grid_column_2[240];
static uint16_t g_grid_column_3[240];
static uint16_t g_grid_column_4[240];
static DataBuffer g_data_buffer;
static DisplayBuffer g_display_buffer;
static int g_trace_column = (GRID_WIDTH-1);
static bool g_toast_active = false;
static int g_toast_timer = TIMER_DISABLE;
static int g_state = -1;
static int g_state_timer = TIMER_DISABLE;
static bool g_calibration_mode = false;
static bool g_calibration_dual_channel = false;
static int g_calibration_parameter = CALIB_ZERO;
/*- Implementations ---------------------------------------------------------*/
//-----------------------------------------------------------------------------
static void grid_init(void)
{
// Setup column data
for (int y = 0; y < 199; y++)
g_grid_column_0[y] = GRID_BG_COLOR;
for (int y = 0; y < 199; y++)
g_grid_column_1[y] = (4 == (y % 5)) ? GRID_FG_COLOR : GRID_BG_COLOR;
for (int y = 0; y < 199; y++)
g_grid_column_2[y] = (24 == (y % 25)) ? GRID_FG_COLOR : GRID_BG_COLOR;
g_grid_column_2[0] = GRID_FG_COLOR;
g_grid_column_2[1] = GRID_FG_COLOR;
g_grid_column_2[98] = GRID_FG_COLOR;
g_grid_column_2[100] = GRID_FG_COLOR;
g_grid_column_2[197] = GRID_FG_COLOR;
g_grid_column_2[198] = GRID_FG_COLOR;
for (int y = 0; y < 199; y++)
g_grid_column_3[y] = (4 == (y % 5)) ? GRID_FG_COLOR : GRID_BG_COLOR;
g_grid_column_3[0] = GRID_FG_COLOR;
g_grid_column_3[1] = GRID_FG_COLOR;
g_grid_column_3[2] = GRID_FG_COLOR;
g_grid_column_3[98] = GRID_FG_COLOR;
g_grid_column_3[100] = GRID_FG_COLOR;
g_grid_column_3[196] = GRID_FG_COLOR;
g_grid_column_3[197] = GRID_FG_COLOR;
g_grid_column_3[198] = GRID_FG_COLOR;
for (int y = 0; y < 199; y++)
g_grid_column_4[y] = (24 == (y % 25)) ? GRID_FG_COLOR : GRID_BG_COLOR;
// Assign columns
for (int x = 0; x < 299; x++)
g_grid_data[x] = g_grid_column_0;
for (int x = 4; x < 299; x += 5)
g_grid_data[x] = g_grid_column_2;
for (int x = 24; x < 299; x += 25)
g_grid_data[x] = g_grid_column_3;
g_grid_data[0] = g_grid_column_1;
g_grid_data[1] = g_grid_column_1;
g_grid_data[2] = g_grid_column_4;
g_grid_data[148] = g_grid_column_1;
g_grid_data[150] = g_grid_column_1;
g_grid_data[296] = g_grid_column_4;
g_grid_data[297] = g_grid_column_1;
g_grid_data[298] = g_grid_column_1;
}
//-----------------------------------------------------------------------------
static void toast_show(void)
{
if (!g_toast_active)
lcd_fill_rect(GRID_LEFT, GRID_BOTTOM+1, GRID_WIDTH+1, STATUS_LINE_HEIGHT, BG_COLOR);
lcd_set_color(BG_COLOR, TOAST_COLOR);
g_toast_active = true;
g_toast_timer = TOAST_TIMEOUT;
}
//-----------------------------------------------------------------------------
static bool trace_ready(void)
{
return (g_trace_column == (GRID_WIDTH-1));
}
//-----------------------------------------------------------------------------
static void redraw_trace(void)
{
if (trace_ready())
g_trace_column = 0;
}
//-----------------------------------------------------------------------------
static void update_column_from_image(int index, uint16_t *column, int x, int y, const Image *image)
{
int image_col = index - x + image->ox + 1;
if (image_col < 0 || image_col > (image->width-1))
return;
for (int i = 0; i < image->height; i++)
{
int color = image->data[i * image->width + image_col];
if (color)
column[y + i] = color;
}
}
//-----------------------------------------------------------------------------
static void update_from_display_buffer(uint16_t *column, DisplayBuffer *db)
{
bool clip_h = db->flags[g_trace_column] & SAMPLE_FLAG_CLIP_H;
bool clip_l = db->flags[g_trace_column] & SAMPLE_FLAG_CLIP_L;
int color;
if (db->flags[g_trace_column] & SAMPLE_FLAG_VALID)
{
if (clip_h || clip_l)
color = TRACE_CLIP_COLOR;
else if (db->flags[g_trace_column] & SAMPLE_FLAG_FILLED)
color = TRACE_FILLED_COLOR;
else
color = TRACE_COLOR;
for (int y = db->min[g_trace_column]; y <= db->max[g_trace_column]; y++)
column[y] = color;
}
else
{
column[GRID_HEIGHT/2-1] = TRACE_INVALID_COLOR;
}
if (clip_h)
{
for (int i = 0; i < 3; i++)
column[i] = TRACE_CLIP_COLOR;
}
if (clip_l)
{
for (int i = 0; i < 3; i++)
column[GRID_HEIGHT-2 - i] = TRACE_CLIP_COLOR;
}
}
//-----------------------------------------------------------------------------
static void draw_trace(void)
{
uint16_t column[GRID_HEIGHT];
if (trace_ready())
return;
for (int i = 0; i < GRID_HEIGHT; i++)
column[i] = g_grid_data[g_trace_column][i];
update_from_display_buffer(column, &g_display_buffer);
if (config.horizontal_position_px < -(GRID_WIDTH/2-1))
{
update_column_from_image(g_trace_column, column, GRID_WIDTH-1, 1, &image_trigger_offset_right);
}
else if (config.horizontal_position_px > (GRID_WIDTH/2-1))
{
update_column_from_image(g_trace_column, column, 1, 1, &image_trigger_offset_left);
}
else
{
int pos = GRID_WIDTH/2 - config.horizontal_position_px;
update_column_from_image(g_trace_column, column, pos, 0, &image_trigger_offset);
}
lcd_draw_buf(GRID_LEFT+1 + g_trace_column, GRID_TOP+1, 1, GRID_HEIGHT-1, column);
g_trace_column++;
}
//-----------------------------------------------------------------------------
static void draw_grid_frame(void)
{
lcd_vline(10, 20, 220, GRID_FG_COLOR);
lcd_vline(310, 20, 220, GRID_FG_COLOR);
lcd_hline(10, 310, 20, GRID_FG_COLOR);
lcd_hline(10, 310, 220, GRID_FG_COLOR);
}
//-----------------------------------------------------------------------------
static void draw_ac_dc(void)
{
if (g_toast_active)
return;
lcd_draw_image(54, STATUS_LINE_Y, config.ac_coupling ? &image_ac : &image_dc);
}
//-----------------------------------------------------------------------------
static void draw_horizontal_scale(void)
{
if (g_toast_active)
return;
lcd_set_color(BG_COLOR, HSCALE_COLOR);
lcd_puts(82, STATUS_LINE_Y, hs_str[config.horizontal_scale]);
}
//-----------------------------------------------------------------------------
static void draw_horizontal_position(void)
{
char *str;
if (g_toast_active || g_calibration_mode)
return;
str = format_time(config.horizontal_position, true);
lcd_set_color(BG_COLOR, HPOS_COLOR);
lcd_puts(236, STATUS_LINE_Y, str);
}
//-----------------------------------------------------------------------------
static void draw_vertical_position(bool toast)
{
int y = GRID_CENTER_Y - config.vertical_position;
lcd_fill_rect(0, GRID_TOP-4, 9, GRID_HEIGHT+9, BG_COLOR);
if (y < GRID_TOP)
lcd_draw_image(GRID_LEFT-5, GRID_TOP, &image_reference_level_up);
else if (y > GRID_BOTTOM)
lcd_draw_image(GRID_LEFT-5, GRID_BOTTOM, &image_reference_level_down);
else
lcd_draw_image(GRID_LEFT-2, y, &image_reference_level);
if (toast)
{
char *str;
toast_show();
lcd_puts(GRID_LEFT, STATUS_LINE_Y, "Vertical position");
str = format_divisions((config.vertical_position * 100) / GRID_DIV_PX, true);
lcd_puts(GRID_LEFT + 140, STATUS_LINE_Y, str);
str = format_voltage(config.vertical_position_mv, true);
lcd_puts(GRID_LEFT + 226, STATUS_LINE_Y, str);
}
}
//-----------------------------------------------------------------------------
static void draw_vertical_scale(void)
{
if (g_toast_active)
return;
lcd_set_color(BG_COLOR, VSCALE_COLOR);
lcd_puts(10, STATUS_LINE_Y, vs_str[config.vertical_scale]);
}
//-----------------------------------------------------------------------------
static void draw_trigger_level(void)
{
char *str;
lcd_fill_rect(GRID_RIGHT+2, GRID_TOP-4, 8, GRID_HEIGHT+9, BG_COLOR);
lcd_draw_image(GRID_RIGHT+2, GRID_CENTER_Y - config.trigger_level,
&image_trigger_level);
if (g_toast_active || g_calibration_mode)
return;
str = format_voltage(config.trigger_level_mv - config.vertical_position_mv, true);
lcd_set_color(BG_COLOR, TRIGGER_LEVEL_COLOR);
lcd_puts(148, STATUS_LINE_Y, str);
}
//-----------------------------------------------------------------------------
static void draw_trigger_edge(void)
{
if (g_toast_active || g_calibration_mode)
return;
if (TRIGGER_EDGE_RISE == config.trigger_edge)
lcd_draw_image(140, STATUS_LINE_Y, &image_trigger_edge_rise);
else if (TRIGGER_EDGE_FALL == config.trigger_edge)
lcd_draw_image(140, STATUS_LINE_Y, &image_trigger_edge_fall);
else
lcd_draw_image(140, STATUS_LINE_Y, &image_trigger_edge_both);
}
//-----------------------------------------------------------------------------
static void draw_trigger_mode(void)
{
char *str;
if (TRIGGER_MODE_AUTO == config.trigger_mode)
str = "AUTO";
else if (TRIGGER_MODE_NORMAL == config.trigger_mode)
str = "NORM";
else
str = "SNGL";
lcd_set_color(BG_COLOR, TRIGGER_MODE_COLOR);
lcd_puts(10, 4, str);
}
//-----------------------------------------------------------------------------
static void draw_capture_state(void)
{
int state = capture_get_state();
int color = BG_COLOR;
char *str = "";
if (g_state == state)
return;
if (CAPTURE_STATE_STOP == state)
{
color = CAPTURE_STOP_COLOR;
str = "STOP";
}
else if (CAPTURE_STATE_WAIT == state)
{
color = CAPTURE_WAIT_COLOR;
str = "WAIT";
}
else if (CAPTURE_STATE_TRIG == state)
{
color = CAPTURE_TRIG_COLOR;
str = "TRIG";
}
lcd_set_color(BG_COLOR, color);
lcd_puts(46, 4, str);
g_state = state;
}
//-----------------------------------------------------------------------------
static void draw_miniview(int trigger_offset, int window_offset, int window_width)
{
static const uint8_t wave_pattern[8] = { 1, 0, 0, 1, 2, 3, 3, 2 };
uint16_t buf[8];
for (int x = -MINIVIEW_WIDTH/2+1; x < MINIVIEW_WIDTH/2; x++)
{
bool inside = ((x > window_offset) && (x < (window_offset + window_width)));
bool edge = ((x == window_offset) || (x == (window_offset + window_width - 1)));
if (edge)
{
for (int i = 0; i < 8; i++)
buf[i] = MV_FRAME_COLOR;
}
else
{
for (int i = 0; i < 8; i++)
buf[i] = BG_COLOR;
buf[2 + wave_pattern[x % sizeof(wave_pattern)]] = inside ? TRACE_COLOR : MV_FRAME_COLOR;
if (inside)
{
buf[0] = MV_FRAME_COLOR;
buf[7] = MV_FRAME_COLOR;
}
}
lcd_draw_buf(GRID_CENTER_X + x, 7, 1, 8, buf);
}
#define LEFT (GRID_CENTER_X - MINIVIEW_WIDTH/2)
#define RIGHT (GRID_CENTER_X + MINIVIEW_WIDTH/2)
lcd_fill_rect(LEFT - image_trigger_mv.width/2, 1, MINIVIEW_WIDTH + image_trigger_mv.width,
image_trigger_mv.height, BG_COLOR);
lcd_draw_image(GRID_CENTER_X + trigger_offset, 5, &image_trigger_mv);
lcd_vline(LEFT, 6, 15, MV_FRAME_COLOR);
lcd_hline(LEFT, LEFT+2, 6, MV_FRAME_COLOR);
lcd_hline(LEFT, LEFT+2, 15, MV_FRAME_COLOR);
lcd_vline(RIGHT, 6, 15, MV_FRAME_COLOR);
lcd_hline(RIGHT-2, RIGHT, 6, MV_FRAME_COLOR);
lcd_hline(RIGHT-2, RIGHT, 15, MV_FRAME_COLOR);
#undef LEFT
#undef RIGHT
}
//-----------------------------------------------------------------------------
static void draw_sample_rates(int sample_rate_limit, int sample_rate)
{
char *str;
lcd_set_font(FONT_SMALL);
str = format_sps(sample_rate_limit);
lcd_set_color(BG_COLOR, SR_LIMIT_COLOR);
lcd_puts(252, 2, str);
str = format_sps(sample_rate);
lcd_set_color(BG_COLOR, SR_COLOR);
lcd_puts(252, 10, str);
lcd_set_font(FONT_LARGE);
}
//-----------------------------------------------------------------------------
static void update_sample_rate(void)
{
int64_t hp_abs = (config.horizontal_position < 0) ? -config.horizontal_position : config.horizontal_position;
int64_t window_time = (int64_t)hs_div_value[config.horizontal_scale] * GRID_DIVS_H;
int64_t period = BASE_SAMPLE_PERIOD;
int64_t trigger_margin, trigger_offset;
int64_t buffer_time, required_time;
int64_t window_offset;
int64_t denom;
int sample_rate = BASE_SAMPLE_RATE;
int sample_rate_limit;
int trigger_offset_px, window_offset_px, window_width_px;
int sr_divider = config.sample_rate_limit;
for (int i = 0; i < config.sample_rate_limit; i++)
{
period *= 2;
sample_rate /= 2;
}
sample_rate_limit = sample_rate;
while (1)
{
trigger_margin = period * TRIGGER_MARGIN_SAMPLES;
required_time = trigger_margin + hp_abs + window_time/2;
buffer_time = (int64_t)CAPTURE_BUFFER_SIZE * period;
if (required_time < window_time)
required_time = window_time;
if (required_time < buffer_time)
break;
sr_divider++;
period *= 2;
sample_rate /= 2;
}
g_calibration_dual_channel = (sr_divider == 0);
denom = buffer_time - window_time/2 - trigger_margin;
trigger_offset = -config.horizontal_position * (buffer_time/2 - trigger_margin) / denom;
window_offset = trigger_offset + config.horizontal_position;
capture_set_horizontal_parameters(sr_divider, CAPTURE_BUFFER_SIZE/2 + trigger_offset / period);
denom = period * CAPTURE_BUFFER_SIZE;
trigger_offset_px = (trigger_offset * MINIVIEW_WIDTH) / denom;
window_offset_px = ((window_offset - window_time/2) * MINIVIEW_WIDTH) / denom;
window_width_px = (window_time * MINIVIEW_WIDTH) / denom;
if (window_offset_px == 0)
window_offset_px = -1;
if (window_width_px < 3)
window_width_px = 3;
draw_miniview(trigger_offset_px, window_offset_px, window_width_px);
draw_sample_rates(sample_rate_limit, sample_rate);
}
//-----------------------------------------------------------------------------
static int clip_for_display(int value)
{
value = GRID_HEIGHT/2-1 - value;
if (value > (GRID_HEIGHT-2))
value = (GRID_HEIGHT-2);
else if (value < 0)
value = 0;
return value;
}
//---------------------------------------------------------------------
static void close_gaps(DisplayBuffer *db)
{
for (int i = 0; i < GRID_WIDTH-1; i++)
{
if ((db->flags[i] & SAMPLE_FLAG_VALID) && (db->flags[i+1] & SAMPLE_FLAG_VALID))
{
if (db->max[i] < (db->min[i+1]-1))
{
int avg = (db->max[i] + db->min[i+1]) / 2;
db->max[i] = avg;
db->min[i+1] = avg+1;
}
else if (db->min[i] > (db->max[i+1] + 1))
{
int avg = (db->min[i] + db->max[i+1]) / 2;
db->min[i] = avg;
db->max[i+1] = avg-1;
}
}
}
}
//-----------------------------------------------------------------------------
static void update_display(void)
{
int scale = vs_px_value[config.vertical_scale];
g_data_buffer.size = GRID_WIDTH;
capture_get_data(&g_data_buffer);
for (int i = 0; i < GRID_WIDTH; i++)
{
int min = (g_data_buffer.min[i] - g_data_buffer.vertical_position) / scale + config.vertical_position;
int max = (g_data_buffer.max[i] - g_data_buffer.vertical_position) / scale + config.vertical_position;
g_display_buffer.min[i] = clip_for_display(max);
g_display_buffer.max[i] = clip_for_display(min);
g_display_buffer.flags[i] = g_data_buffer.flags[i];
}
close_gaps(&g_display_buffer);
redraw_trace();
}
//-----------------------------------------------------------------------------
static void change_horizontal_scale(int delta)
{
if ((delta < 0 && config.horizontal_scale == 0) ||
(delta > 0 && config.horizontal_scale == HS_LAST))
return;
config.horizontal_scale += delta;
config.horizontal_position_px = config.horizontal_position / hs_px_value[config.horizontal_scale];
config.horizontal_period = hs_px_value[config.horizontal_scale];
draw_horizontal_scale();
draw_horizontal_position();
update_sample_rate();
update_display();
}
//-----------------------------------------------------------------------------
static void change_horizontal_position(int delta)
{
int div = hs_px_value[config.horizontal_scale];
if ((delta < 0 && config.horizontal_position <= MIN_HORIZONTAL_POSITION) ||
(delta > 0 && config.horizontal_position >= MAX_HORIZONTAL_POSITION))
return;
config.horizontal_position_px = config.horizontal_position / div + delta;
config.horizontal_position = (int64_t)config.horizontal_position_px * div;
draw_horizontal_position();
update_sample_rate();
update_display();
}
//-----------------------------------------------------------------------------
static void change_vertical_scale(int delta)
{
if ((delta < 0 && config.vertical_scale == 0) ||
(delta > 0 && config.vertical_scale == VS_LAST))
return;
config.vertical_scale += delta;
config.vertical_mult = config.calib_vs_mult[config.vertical_scale];
config.vertical_position_mv = config.vertical_position * vs_px_value[config.vertical_scale];
config.trigger_level_mv = config.trigger_level * vs_px_value[config.vertical_scale];
capture_set_vertical_parameters();
capture_set_trigger_level(config.trigger_level_mv);
draw_vertical_scale();
draw_trigger_level();
update_display();
}
//-----------------------------------------------------------------------------
static void change_vertical_position(int delta)
{
if ((delta < 0 && config.vertical_position <= MIN_VERTICAL_POSITION) ||
(delta > 0 && config.vertical_position >= MAX_VERTICAL_POSITION))
return;
config.vertical_position += delta;
config.vertical_position_mv = config.vertical_position * vs_px_value[config.vertical_scale];
capture_set_vertical_parameters();
draw_vertical_position(true);
draw_trigger_level();
update_display();
}
//-----------------------------------------------------------------------------
static void change_trigger_level(int delta)
{
if ((delta < 0 && config.trigger_level == MIN_TRIGGER_LEVEL) ||
(delta > 0 && config.trigger_level == MAX_TRIGGER_LEVEL))
return;
config.trigger_level += delta;
config.trigger_level_mv = config.trigger_level * vs_px_value[config.vertical_scale];
capture_set_trigger_level(config.trigger_level_mv);
draw_trigger_level();
}
//-----------------------------------------------------------------------------
static void change_sample_rate_limit(int delta)
{
if ((delta < 0 && config.sample_rate_limit == 0) ||
(delta > 0 && config.sample_rate_limit == MAX_SAMPLE_RATE_LIMIT))
return;
config.sample_rate_limit += delta;
update_sample_rate();
}
//-----------------------------------------------------------------------------
static void change_calibration_value(int delta, bool shift)
{
if (shift)
{
if (g_calibration_parameter == CALIB_OFFSET)
g_calibration_parameter = CALIB_ZERO;
else
g_calibration_parameter++;
lcd_fill_rect(CALIB_AREA_LEFT, GRID_BOTTOM+1, CALIB_AREA_WIDTH, STATUS_LINE_HEIGHT, BG_COLOR);
return;
}
if (g_calibration_parameter == CALIB_ZERO)
{
config.calib_dac_zero += delta;
if (config.calib_dac_zero < 1900)
config.calib_dac_zero = 1900;
else if (config.calib_dac_zero > 2200)
config.calib_dac_zero = 2200;
}
else if (g_calibration_parameter == CALIB_DELTA)
{
config.calib_channel_delta += delta;
if (config.calib_channel_delta < -64)
config.calib_channel_delta = -64;
else if (config.calib_channel_delta > 64)
config.calib_channel_delta = 64;
}
else if (g_calibration_parameter == CALIB_SCALE)
{
config.calib_vs_mult[config.vertical_scale] += delta;
if (config.calib_vs_mult[config.vertical_scale] < 0)
config.calib_vs_mult[config.vertical_scale] = 0;
else if (config.calib_vs_mult[config.vertical_scale] > 4000000)
config.calib_vs_mult[config.vertical_scale] = 4000000;
}
else if (g_calibration_parameter == CALIB_OFFSET)
{
config.calib_dac_mult[config.vertical_scale] += delta;
if (config.calib_dac_mult[config.vertical_scale] < 0)
config.calib_dac_mult[config.vertical_scale] = 0;
else if (config.calib_dac_mult[config.vertical_scale] > 100000)
config.calib_dac_mult[config.vertical_scale] = 100000;
}
capture_set_vertical_parameters();
}
//-----------------------------------------------------------------------------
static void draw_calibration_info(void)
{
static const char *labels[] = { "Z", "D", "S", "O" };
char *str;
lcd_set_color(BG_COLOR, LCD_WHITE_COLOR);
if (!g_toast_active)
lcd_puts(CALIB_AREA_LEFT, STATUS_LINE_Y, labels[g_calibration_parameter]);
g_data_buffer.size = GRID_WIDTH;
if (g_calibration_parameter == CALIB_ZERO || g_calibration_parameter == CALIB_DELTA)
{
if ((g_calibration_parameter == CALIB_ZERO) == g_calibration_dual_channel)
lcd_set_color(BG_COLOR, LCD_RED_COLOR);
capture_get_raw_data(g_data_buffer.max, GRID_WIDTH/2);
if (g_calibration_dual_channel)
{
for (int i = 1; i < GRID_WIDTH/2; i += 2)
g_data_buffer.max[i] = rbit8(g_data_buffer.max[i]) + config.calib_channel_delta;
}
if (!g_toast_active)
{
str = format_raw_data(g_data_buffer.max, 4);
lcd_puts(CALIB_AREA_LEFT + 24, STATUS_LINE_Y, str);
}
#define PIXEL_SIZE 15
for (int i = 0; i < GRID_WIDTH/2; i++)
{
g_data_buffer.max[i] -= ZERO_POINT;
g_data_buffer.min[i] = g_data_buffer.max[i];
if (0 == i % PIXEL_SIZE)
{
g_data_buffer.max[GRID_WIDTH/2 + i] = 0;
g_data_buffer.min[GRID_WIDTH/2 + i] = 0;
}
else
{
int value = g_data_buffer.max[i / PIXEL_SIZE] * PIXEL_SIZE;
g_data_buffer.max[GRID_WIDTH/2 + i] = value + PIXEL_SIZE/2;
g_data_buffer.min[GRID_WIDTH/2 + i] = value - PIXEL_SIZE/2;
}
}
for (int i = 0; i < GRID_WIDTH; i++)
{
g_display_buffer.min[i] = clip_for_display(g_data_buffer.max[i]);
g_display_buffer.max[i] = clip_for_display(g_data_buffer.min[i]);
g_display_buffer.flags[i] = SAMPLE_FLAG_VALID;
}
redraw_trace();
}
else // if (g_calibration_parameter == CALIB_SCALE || g_calibration_parameter == CALIB_OFFSET)
{
update_display();
int vmin = g_data_buffer.min_value;
int vmax = g_data_buffer.max_value;
int vpos = g_data_buffer.vertical_position;
if (!g_toast_active)
{
str = format_voltage(vmin - vpos, true);
lcd_puts(CALIB_AREA_LEFT + 12, STATUS_LINE_Y, str);
str = format_voltage(vmax - vpos, true);
lcd_puts(CALIB_AREA_LEFT + 96, STATUS_LINE_Y, str);
}
}
}
//-----------------------------------------------------------------------------
static void draw_status_line(void)
{
lcd_fill_rect(GRID_LEFT, GRID_BOTTOM+1, GRID_WIDTH+1, STATUS_LINE_HEIGHT, BG_COLOR);
draw_vertical_scale();
draw_ac_dc();
draw_horizontal_scale();
draw_horizontal_position();
draw_trigger_level();
draw_trigger_edge();
}
//-----------------------------------------------------------------------------
void scope_buttons_handler(int buttons)
{
bool shift = (buttons & BTN_SHIFT);
bool repeat = (buttons & BTN_REPEAT);
if ((buttons & BTN_UP) && (buttons & BTN_DOWN))
{
config.vertical_position = 0;
config.vertical_position_mv = 0;
capture_set_vertical_parameters();
draw_vertical_position(true);
update_display();
}
else if (buttons & BTN_UP)
{
if (shift)
change_vertical_scale(1);
else
change_vertical_position(1);
}
else if (buttons & BTN_DOWN)
{
if (shift)
change_vertical_scale(-1);
else
change_vertical_position(-1);
}
else if ((buttons & BTN_LEFT) && (buttons & BTN_RIGHT))
{
config.horizontal_position = 0;
config.horizontal_position_px = 0;
draw_horizontal_position();
update_sample_rate();
update_display();
}
else if (buttons & BTN_LEFT)
{
if (shift)
change_horizontal_scale(-1);
else
change_horizontal_position(1);
}
else if (buttons & BTN_RIGHT)
{
if (shift)
change_horizontal_scale(1);
else
change_horizontal_position(-1);
}
else if (buttons & BTN_TRIG)
{
if (repeat || g_calibration_mode)
return;