barebones 'hello world' project

1 files changed, 41 insertions, 134 deletions

diff --git a/Sensor Watch Starter Project/app/app.c b/Sensor Watch Starter Project/app/app.c
index 1ada8a3f..eb862767 100644
--- a/Sensor Watch Starter Project/app/app.c
+++ b/Sensor Watch Starter Project/app/app.c
@@ -7,129 +7,30 @@ void uart_putc(char c);
 void uart_puts(char *s);
 
 typedef enum ApplicationMode {
-    MODE_TIME,
-    MODE_SENSE,
-    MODE_SET_HOUR,
-    MODE_SET_MINUTE,
-    MODE_SET_SECOND
+    MODE_HELLO = 0,
+    MODE_THERE
 } ApplicationMode;
 
+typedef enum LightColor {
+    COLOR_OFF = 0,
+    COLOR_RED = 1,
+    COLOR_GREEN = 2,
+    COLOR_YELLOW = 3
+} LightColor;
+
 typedef struct ApplicationState {
     ApplicationMode mode;
-    bool light_pressed;
-    bool mode_pressed;
-    bool alarm_pressed;
-    bool light_on;
-    uint16_t dig_T1; /**< dig_T1 cal register. */
-    int16_t dig_T2;  /**<  dig_T2 cal register. */
-    int16_t dig_T3;  /**< dig_T3 cal register. */
+    LightColor color;
 } ApplicationState;
 
 ApplicationState applicationState;
 
 void cb_light_pressed() {
-    applicationState.light_pressed = true;
+    applicationState.color = (applicationState.color + 1) % 4;
 }
 
 void cb_mode_pressed() {
-    applicationState.mode_pressed = true;
-}
-
-void cb_alarm_pressed() {
-    applicationState.alarm_pressed = true;
-}
-
-void cb_tick() {
-    ;
-}
-#define BMP280_REGISTER_DIG_T1 0x88
-#define BMP280_REGISTER_DIG_T2 0x8A
-#define BMP280_REGISTER_DIG_T3 0x8C
-#define BMP280_REGISTER_SOFTRESET 0xE0
-#define BMP280_REGISTER_STATUS 0xF3
-#define BMP280_REGISTER_CONTROL 0xF4
-#define BMP280_REGISTER_CONFIG 0xF5
-#define BMP280_REGISTER_PRESSUREDATA 0xF7
-#define BMP280_REGISTER_TEMPDATA 0xFA
-
-uint16_t read8(uint8_t reg) {
-    uint8_t val;
-    watch_i2c_send(0x77, &reg, 1);
-    watch_i2c_receive(0x77, &val, 1);
-    return val;
-}
-
-uint16_t read16(uint8_t reg) {
-    uart_puts("\nReading 2 bytes... ");
-    uint8_t buf[2];
-    watch_i2c_send(0x77, &reg, 1);
-    watch_i2c_receive(0x77, (uint8_t *)&buf, 2);
-    uart_puts("received!\n");
-    char buf2[32] = {0};
-    sprintf(buf2, "buf has values: %#02x, %#02x", buf[0], buf[1]);
-    uart_puts(buf2);
-
-    return (buf[0] << 8) | buf[1];
-}
-
-uint32_t read24(uint8_t reg) {
-    uart_puts("\nReading 3 bytes... ");
-    uint32_t value;
-    uint8_t buf[3];
-
-    watch_i2c_send(0x77, &reg, 1);
-    watch_i2c_receive(0x77, (uint8_t *)&buf, 3);
-    uart_puts("received!\n");
-    char buf2[33] = {0};
-    sprintf(buf2, "buf has values: %#02x, %#02x, %#02x", buf[0], buf[1], buf[2]);
-    uart_puts(buf2);
-
-    value = buf[0];
-    value <<= 8;
-    value |= buf[1];
-    value <<= 8;
-    value |= buf[2];
-
-    return value;
-}
-
-uint16_t read16_LE(uint8_t reg) {
-  uint16_t temp = read16(reg);
-  return (temp >> 8) | (temp << 8);
-}
-
-int16_t readS16(uint8_t reg) { 
-    return (int16_t)read16(reg); 
-}
-
-int16_t readS16_LE(uint8_t reg) {
-  return (int16_t)read16_LE(reg);
-}
-
-void print_temperature() {
-    int32_t var1, var2;
-    int32_t t_fine;
-
-    int32_t adc_T = read24(BMP280_REGISTER_TEMPDATA);
-    adc_T >>= 4;
-
-    var1 = ((((adc_T >> 3) - ((int32_t)applicationState.dig_T1 << 1))) *
-        ((int32_t)applicationState.dig_T2)) >>
-        11;
-
-    var2 = (((((adc_T >> 4) - ((int32_t)applicationState.dig_T1)) *
-        ((adc_T >> 4) - ((int32_t)applicationState.dig_T1))) >>
-        12) *
-        ((int32_t)applicationState.dig_T3)) >>
-        14;
-
-    t_fine = var1 + var2;
-
-    float T = ((t_fine * 5 + 128) >> 8) / 100.0;
-
-    char buf[32] = {0};
-    sprintf(buf, "\n\nTemp is %3.2f degrees C", T);
-    uart_puts(buf);
+    applicationState.mode = (applicationState.mode + 1) % 2;
 }
 
 /**
@@ -143,26 +44,14 @@ void print_temperature() {
  */
 void app_init() {
     memset(&applicationState, 0, sizeof(applicationState));
+
+    watch_enable_led(false);
+
     watch_enable_buttons();
     watch_register_button_callback(BTN_LIGHT, cb_light_pressed);
+    watch_register_button_callback(BTN_MODE, cb_mode_pressed);
 
-    watch_enable_date_time();
-    watch_enable_tick_callback(cb_tick);
-    
     watch_enable_display();
-    watch_enable_led();
-    watch_enable_i2c();
-
-    uart_puts("\n\nI2C Driver Test\n");
-    uint8_t reset_cmd[] = {0xE0, 0xB6};
-    watch_i2c_send(0x77, reset_cmd, 2);
-    uart_puts("Reset BMP280\n");
-    applicationState.dig_T1 = read16_LE(BMP280_REGISTER_DIG_T1);
-    applicationState.dig_T2 = readS16_LE(BMP280_REGISTER_DIG_T2);
-    applicationState.dig_T3 = readS16_LE(BMP280_REGISTER_DIG_T3);
-
-    uint8_t ctrl_cmd[] = {0xF4, 0xA3};
-    watch_i2c_send(0x77, ctrl_cmd, 2);
 }
 
 /**
@@ -172,9 +61,6 @@ void app_init() {
  * a press on one of the buttons).
  */
 void app_prepare_for_sleep() {
-    applicationState.light_pressed = false;
-    applicationState.mode_pressed = false;
-    applicationState.alarm_pressed = false;
 }
 
 /**
@@ -182,12 +68,33 @@ void app_prepare_for_sleep() {
  * STANDBY sleep mode.
  */
 void app_wake_from_sleep() {
-
 }
 
+/**
+ * @brief the app_loop function is called once on app startup and then again each time
+ * the watch STANDBY sleep mode.
+ */
 void app_loop() {
-    if (applicationState.light_pressed) {
-        print_temperature();
+    switch (applicationState.color) {
+        case COLOR_RED:
+            watch_set_led_red();
+            break;
+        case COLOR_GREEN:
+            watch_set_led_green();
+            break;
+        case COLOR_YELLOW:
+            watch_set_led_yellow();
+            break;
+        default:
+            applicationState.color = COLOR_OFF;
+            watch_set_led_off();
+    }
+    switch (applicationState.mode) {
+        case MODE_HELLO:
+            watch_display_string("Hello", 5);
+            break;
+        case MODE_THERE:
+            watch_display_string("there", 5);
+            break;
     }
-    uart_putc('.');
 }