rarias/coffee
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Use average temperature over 16 samples

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This commit is contained in:
Rodrigo Arias Mallo 2025-10-13 21:09:06 +02:00
parent c2e823dfb5
commit ebd47ee2c5
1 changed files with 16 additions and 2 deletions
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18
barista/barista.ino
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@ -63,6 +63,8 @@ struct input {
enum logic btn[MAX_BTN]; enum logic btn[MAX_BTN];
} g_in; } g_in;
#define MAX_SAMPLES 16
struct state { struct state {
enum machine_state mstate; enum machine_state mstate;
unsigned long brewing_t0; unsigned long brewing_t0;
@ -70,8 +72,11 @@ struct state {
unsigned long heating_t0; unsigned long heating_t0;
unsigned long hot_t0; unsigned long hot_t0;
int ntc_i; /* Next available place */
float ntc_R; float ntc_R;
float ntc_T; float ntc_last_T;
float ntc_array_T[MAX_SAMPLES];
float ntc_T; /* average */
struct btn btn[MAX_BTN]; struct btn btn[MAX_BTN];
enum buzz_state buzz_state; enum buzz_state buzz_state;
@ -114,7 +119,16 @@ void do_input(struct input *input)
void proc_ntc(struct state *state, const struct input *input) void proc_ntc(struct state *state, const struct input *input)
{ {
state->ntc_R = ntc_resistance(input->ntc_V); state->ntc_R = ntc_resistance(input->ntc_V);
state->ntc_T = ntc_temp(state->ntc_R); state->ntc_last_T = ntc_temp(state->ntc_R);
state->ntc_array_T[state->ntc_i++] = state->ntc_last_T;
if (state->ntc_i >= MAX_SAMPLES)
state->ntc_i = 0;
float avg = 0;
for (int i = 0; i < MAX_SAMPLES; i++)
avg += state->ntc_array_T[i];
state->ntc_T = avg / MAX_SAMPLES;
} }
void proc_buttons(struct state *state, const struct input *input) void proc_buttons(struct state *state, const struct input *input)