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保留总显示数字4位

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不吃油炸鸡
2025-11-02 16:20:55 +08:00
parent 868efce68d
commit fd3b6f088e
1 changed files with 45 additions and 41 deletions
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86
Power_Pico/User/GUI/screens/ui_mainPage.c
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@@ -8,6 +8,7 @@
#include "data_queue.h"
#include "math.h"
#include "BL24C02.h" // system settings
#include "rtc.h" // elapsed time
lv_obj_t * ui_HomeScreen = NULL;
static lv_obj_t * ui_ButVal = NULL;
@@ -48,69 +49,72 @@ void ui_main_page_key_handler(uint8_t key_id)
}
}
static void fmt_sig4(char *buf, size_t size, float v)
{
if (!isfinite(v)) { snprintf(buf, size, "--"); return; }
if (fabsf(v) < 1e-9f) v = 0.0f; // 处理接近零的值
float av = fabsf(v);
int int_digits = (av >= 1.0f) ? ((int)floorf(log10f(av)) + 1) : 0;
if(int_digits >= 4) {
snprintf(buf, size, "%.0f", roundf(v));
return;
}
int decimals = (int_digits == 0) ? 3 : (4 - int_digits); // 确保总数字为 4
snprintf(buf, size, "%.*f", decimals, v);
}
static void set_val_cur_label(float voltage, float current)
{
char buf[16];
// voltage
sprintf(buf, "%.2f", voltage);
// voltage (单位: V) -> 4 位有效数字
fmt_sig4(buf, sizeof(buf), voltage);
lv_label_set_text(ui_LabelValt, buf);
// current
if (fabs(current) >= 1000000.0) {
current = current / 1000000.0;
sprintf(buf, "%.2f", current); // 保留 2 位小数
// current (原始单位: uA)
float cur_uA = current;
float cur_abs_uA = fabsf(cur_uA);
float cur_disp = 0.0f;
if (cur_abs_uA >= 1e6f) {
cur_disp = cur_uA / 1e6f; // A
fmt_sig4(buf, sizeof(buf), cur_disp);
lv_label_set_text(ui_LabelCur, buf);
lv_label_set_text(ui_LabelUnitCur, "A");
} else if(fabs(current) >= 1000.0) {
current = current / 1000.0;
if(fabs(current) >= 100.0) {
sprintf(buf, "%.1f", current);
}
else {
sprintf(buf, "%.2f", current);
}
} else if (cur_abs_uA >= 1e3f) {
cur_disp = cur_uA / 1e3f; // mA
fmt_sig4(buf, sizeof(buf), cur_disp);
lv_label_set_text(ui_LabelCur, buf);
lv_label_set_text(ui_LabelUnitCur, "mA");
} else {
if(fabs(current) >= 100.0) {
sprintf(buf, "%.1f", current);
}
else {
sprintf(buf, "%.2f", current);
}
cur_disp = cur_uA; // uA
fmt_sig4(buf, sizeof(buf), cur_disp);
lv_label_set_text(ui_LabelCur, buf);
lv_label_set_text(ui_LabelUnitCur, "uA");
}
// set power
float power = voltage * current; // in uW
if(fabs(power) >= 1000000.0) {
power = power / 1000000.0;
sprintf(buf, "%.2f", power);
// power = V * A，按 W/mW/uW 选择单位，4 位有效数字
float power_W = voltage * (cur_uA / 1e6f);
float p_abs = fabsf(power_W);
if (p_abs >= 1.0f) {
fmt_sig4(buf, sizeof(buf), power_W); // W
lv_label_set_text(ui_LabelEnerge, buf);
lv_label_set_text(ui_LabelUnitEnerge, "W");
} else if(fabs(power) >= 1000.0) {
power = power / 1000.0;
if(fabs(power) >= 100.0) {
sprintf(buf, "%.1f", power);
}
else {
sprintf(buf, "%.2f", power);
}
} else if (p_abs >= 1e-3f) {
fmt_sig4(buf, sizeof(buf), power_W * 1e3f); // mW
lv_label_set_text(ui_LabelEnerge, buf);
lv_label_set_text(ui_LabelUnitEnerge, "mW");
} else {
if(fabs(power) >= 100.0) {
sprintf(buf, "%.1f", power);
}
else {
sprintf(buf, "%.2f", power);
}
fmt_sig4(buf, sizeof(buf), power_W * 1e6f); // uW
lv_label_set_text(ui_LabelEnerge, buf);
lv_label_set_text(ui_LabelUnitEnerge, "uW");
}
// set time
// time
uint8_t hours = 0, minutes = 0, seconds = 0;
GetElapsedTime_HMS(&hours, &minutes, &seconds);
sprintf(buf, "%02d:%02d:%02d", hours, minutes, seconds);
snprintf(buf, sizeof(buf), "%02d:%02d:%02d", hours, minutes, seconds);
lv_label_set_text(ui_LabelTime, buf);
}