Set up the lux sensor abstraction

display-i2c/main.c

@@ -1,6 +1,68 @@
+#include <dio.h>
 #include <display.h>
-#include <stdio.h>
 #include <i2c.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef enum {
+    ls_ok,
+    ls_unrecognized,
+    ls_not_responding,
+    ls_powered_down,
+} lux_sensor_status_e;
+
+typedef struct lux_sensor_s lux_sensor_t;
+
+struct lux_sensor_s {
+    uint16_t (*read_total_lux)(void *, lux_sensor_status_e *);
+    uint16_t (*read_ir)(void *, lux_sensor_status_e *);
+    uint16_t (*read_visible)(void *, lux_sensor_status_e *);
+
+    void *impl;
+};
+
+uint16_t tsl2561_read_total_lux(void *sensor, lux_sensor_status_e *status) {
+    if (*status != ls_ok) return 0;
+
+    return 0;
+}
+
+uint16_t tsl2561_read_ir(void *sensor, lux_sensor_status_e *status) {
+    if (*status != ls_ok) return 0;
+
+    return 0;
+}
+
+uint16_t tsl2561_read_visible(void *sensor, lux_sensor_status_e *status) {
+    if (*status != ls_ok) return 0;
+
+    return 0;
+}
+
+lux_sensor_t tsl2561_init(dio_t clock, dio_t data) {
+    i2c_bus_t *bus = malloc(sizeof(i2c_bus_t));
+    bus->sda = data;
+    bus->scl = clock;
+    return (lux_sensor_t){
+        .read_total_lux = tsl2561_read_total_lux,
+        .read_ir = tsl2561_read_ir,
+        .read_visible = tsl2561_read_visible,
+        .impl = (void *)bus,
+    };
+}
+
+uint16_t ls_read_total_lux(lux_sensor_t *sensor, lux_sensor_status_e *status) {
+    return sensor->read_total_lux(sensor->impl, status);
+}
+
+uint16_t ls_read_ir(lux_sensor_t *sensor, lux_sensor_status_e *status) {
+    return sensor->read_ir(sensor->impl, status);
+}
+
+uint16_t ls_read_visible(lux_sensor_t *sensor, lux_sensor_status_e *status) {
+    return sensor->read_visible(sensor->impl, status);
+}
+
 
 int main(void) {
     display_t display = {
@@ -11,12 +73,25 @@ int main(void) {
         },
     };
 
+    lux_sensor_t sensor = tsl2561_init(
+        (dio_t){ .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 5 },
+        (dio_t){ .ddr = &DDRB, .port = &PORTB, .pin = &PINB, .addr = 6 }
+    );
+
     int count = 0;
     while (1) {
+        lux_sensor_status_e sensor_status = ls_ok;
         display_init(&display);
+        uint16_t total_lux = ls_read_total_lux(&sensor, &sensor_status);
+        uint16_t ir = ls_read_ir(&sensor, &sensor_status);
 
         char msg[15];
-        snprintf(msg, 15, "[%d]", count);
+        if (sensor_status == ls_ok) {
+            snprintf(msg, 20, "[%d] %d %d", count, total_lux, ir);
+        } else {
+            snprintf(msg, 20, "[%d] error", count);
+        }
+
         display_clear(&display);
         display_write_message(&display, msg);
         _delay_ms(1000);