What do you want to achieve?
I’m trying with the same code both on the simulator for windows and on my board. I would like to get two graphs on two different lines. On the simulator everything is OK, While on my custom board it doesn’t work.
Obviously I have already tested writing/displaying static things on the screen and it works perfectly
What have you tried so far?
Code to reproduce
static lv_obj_t* chart;
static lv_chart_series_t* series;
static lv_obj_t* chart2;
static lv_chart_series_t* series2;
#define CHART_POINT_COUNT 100
static void update_chart_cb(lv_timer_t* timer)
{
static int t=0 ,t1 = 100;
int new_sample = (lv_trigo_sin(t % 360) * 50) / LV_TRIGO_SIN_MAX + 50;
lv_chart_set_next_value(chart, series, new_sample);
t += 10;
int new_sample2 = (lv_trigo_sin(t1 % 360) * 50) / LV_TRIGO_SIN_MAX + 50;
lv_chart_set_next_value(chart2, series2, new_sample2);
t1 += 10;
}
static void analytics_create(lv_obj_t * parent)
{
lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_COLUMN);
chart = lv_chart_create(parent);
lv_obj_set_size(chart, lv_pct(100), lv_pct(50));
lv_obj_align(chart, LV_ALIGN_TOP_MID, 0, 0);
lv_chart_set_type(chart, LV_CHART_TYPE_LINE);
lv_chart_set_range(chart, LV_CHART_AXIS_PRIMARY_Y, 0, 100);
lv_chart_set_point_count(chart, CHART_POINT_COUNT);
lv_chart_set_update_mode(chart, LV_CHART_UPDATE_MODE_SHIFT); // sposta i dati
series = lv_chart_add_series(chart, lv_palette_main(LV_PALETTE_RED), LV_CHART_AXIS_PRIMARY_Y);
chart2 = lv_chart_create(parent);
lv_obj_set_size(chart2, lv_pct(100), lv_pct(50));
lv_obj_align(chart2, LV_ALIGN_BOTTOM_MID,0,0);
lv_chart_set_type(chart2, LV_CHART_TYPE_LINE);
lv_chart_set_range(chart2, LV_CHART_AXIS_PRIMARY_Y, 0, 100);
lv_chart_set_point_count(chart2, CHART_POINT_COUNT);
lv_chart_set_update_mode(chart2, LV_CHART_UPDATE_MODE_SHIFT);
series2 = lv_chart_add_series(chart2, lv_palette_main(LV_PALETTE_BLUE), LV_CHART_AXIS_PRIMARY_Y);
lv_timer_create(update_chart_cb, 50, NULL);
}
Screenshot and/or video
Environment
- MCU/MPU/Board: STM32F746BGT6
- LVGL version: 9.3.0