I have a function named *oled_write_temp* in a.c, if i dont declare it in
a.h , then i will get the wrong supply value in the function within main
call, why?
if i declare it in a.h, then all is right
void oled_write_temp(float set_temp, const float supply, float return_temp)
> {
>
> int base_x = 12, base_y = 60;
>
> char buffer[20] = {0};
>
> *printf("supply_temp %f at %s\n", supply, __FUNCTION__);*
>
> snprintf(buffer, 20, "SUPPLY:%.2f", supply);
> printf("supply_temp string %s\n", buffer);
>
> oled_clear_area(base_x, base_y + 16, 122, base_y + 32);
> OLED_ShowString(base_x, base_y + 16, buffer, 16, 1);
>
> memset(buffer, 0, sizeof(buffer));
> snprintf(buffer, 20, "RETURN:%.2f", return_temp);
> OLED_ShowString(base_x, base_y + 36, buffer, 16, 1);
>
> memset(buffer, 0, sizeof(buffer));
> snprintf(buffer, 20, "SET :%.2f", set_temp);
> OLED_ShowString(base_x, base_y + 56, buffer, 16, 1);
>
> }
>
ps: watch line *printf("supply_temp %f at %s\n", supply, __FUNCTION__);*
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