move user application code to app folder

Sensor Watch Starter Project/app/app.c

@@ -0,0 +1,193 @@
+#include <stdio.h>
+#include <string.h>
+#include "app.h"
+
+// these are implemented in main.c, just want to have access to them here.
+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
+} ApplicationMode;
+
+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. */
+} ApplicationState;
+
+ApplicationState applicationState;
+
+void cb_light_pressed() {
+    applicationState.light_pressed = true;
+}
+
+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);
+}
+
+/**
+ * @brief the app_init function is like setup() in Arduino. It is called once when the
+ * program begins. You should set pin modes and enable any peripherals you want to
+ * set up (real-time clock, I2C, etc.)
+ * 
+ * @note If your app enters the ultra-low power BACKUP sleep mode, this function will 
+ * be called again when it wakes from that deep sleep state. In this state, the RTC will
+ * still be configured with the correct date and time.
+ */
+void app_init() {
+    memset(&applicationState, 0, sizeof(applicationState));
+    watch_enable_buttons();
+    watch_register_button_callback(BTN_LIGHT, cb_light_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);
+}
+
+/**
+ * @brief the app_prepare_for_sleep function is called before the watch goes into the
+ * STANDBY sleep mode. In STANDBY mode, most peripherals are shut down, and no code
+ * will run until the watch receives an interrupt (generally either the 1Hz tick or
+ * a press on one of the buttons).
+ */
+void app_prepare_for_sleep() {
+    applicationState.light_pressed = false;
+    applicationState.mode_pressed = false;
+    applicationState.alarm_pressed = false;
+}
+
+/**
+ * @brief the app_wake_from_sleep function is called after the watch wakes from the
+ * STANDBY sleep mode.
+ */
+void app_wake_from_sleep() {
+
+}
+
+void app_loop() {
+    if (applicationState.light_pressed) {
+        print_temperature();
+    }
+    uart_putc('.');
+}

Sensor Watch Starter Project/app/app.h

@@ -0,0 +1,29 @@
+/**
+  * Header file for Sensor Watch application
+  * 
+  * Ideally you should implement your app entirely within these functions, as well as any
+  * interrupt callbacks you register with the watch API. The general flow is as follows:
+  * 
+  * 1. main.c configures the watch
+  * 2. main.c calls your app_init() function. 
+  *      - You may wish to enable some functionality and peripherals here.
+  *      - You should definitely set up some wake-up sources here.
+  * 3. main.c calls your app_loop() function. 
+  *      - Run code and update your UI here.
+  * 4. main.c calls your app_prepare_for_sleep() function.
+  *      - Consider resetting any state that was set in your wakeup callback here.
+  *      - You may also want to disable / depower external sensors or peripherals here.
+  * 5. main.c enters the STANDBY sleep mode.
+  *      - No user code will run, and the watch will enter a low power mode.
+  *      - The watch will remain in this state until something from (2) wakes it.
+  * 6. main.c calls your app_wake_from_sleep() function.
+  *      - You may wish to re-enable any peripherals you disabled.
+  *      - After this, execution resumes at step (3).
+  */
+
+#include "watch.h"
+
+void app_init();
+void app_loop();
+void app_prepare_for_sleep();
+void app_wake_from_sleep();

Sensor Watch Starter Project/hw/driver_init.c

@@ -25,25 +25,6 @@ struct pwm_descriptor PWM_0;
 
 struct pwm_descriptor PWM_1;
 
-void ADC_0_PORT_init(void)
-{
-
-	// Disable digital pin circuitry
-	gpio_set_pin_direction(A1, GPIO_DIRECTION_OFF);
-
-	gpio_set_pin_function(A1, PINMUX_PB01B_ADC_AIN9);
-
-	// Disable digital pin circuitry
-	gpio_set_pin_direction(A2, GPIO_DIRECTION_OFF);
-
-	gpio_set_pin_function(A2, PINMUX_PB02B_ADC_AIN10);
-
-	// Disable digital pin circuitry
-	gpio_set_pin_direction(A0, GPIO_DIRECTION_OFF);
-
-	gpio_set_pin_function(A0, PINMUX_PB04B_ADC_AIN12);
-}
-
 void ADC_0_CLOCK_init(void)
 {
 	hri_mclk_set_APBCMASK_ADC_bit(MCLK);
@@ -53,12 +34,10 @@ void ADC_0_CLOCK_init(void)
 void ADC_0_init(void)
 {
 	ADC_0_CLOCK_init();
-	ADC_0_PORT_init();
 	adc_sync_init(&ADC_0, ADC, (void *)NULL);
 }
 
-void EXTERNAL_IRQ_0_init(void)
+void EXTERNAL_IRQ_0_init(void) {
-{
 	hri_gclk_write_PCHCTRL_reg(GCLK, EIC_GCLK_ID, CONF_GCLK_EIC_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
 	hri_mclk_set_APBAMASK_EIC_bit(MCLK);
 
@@ -104,19 +83,16 @@ void EXTERNAL_IRQ_0_init(void)
 	ext_irq_init();
 }
 
-void CALENDAR_0_CLOCK_init(void)
+void CALENDAR_0_CLOCK_init(void) {
-{
 	hri_mclk_set_APBAMASK_RTC_bit(MCLK);
 }
 
-void CALENDAR_0_init(void)
+void CALENDAR_0_init(void) {
-{
 	CALENDAR_0_CLOCK_init();
 	calendar_init(&CALENDAR_0, RTC);
 }
 
-void I2C_0_PORT_init(void)
+void I2C_0_PORT_init(void) {
-{
 
 	gpio_set_pin_pull_mode(SDA,
 	                       // <y> Pull configuration
@@ -139,129 +115,89 @@ void I2C_0_PORT_init(void)
 	gpio_set_pin_function(SCL, PINMUX_PB31C_SERCOM1_PAD1);
 }
 
-void I2C_0_CLOCK_init(void)
+void I2C_0_CLOCK_init(void) {
-{
 	hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM1_GCLK_ID_CORE, CONF_GCLK_SERCOM1_CORE_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
 	hri_gclk_write_PCHCTRL_reg(GCLK, SERCOM1_GCLK_ID_SLOW, CONF_GCLK_SERCOM1_SLOW_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
 	hri_mclk_set_APBCMASK_SERCOM1_bit(MCLK);
 }
 
-void I2C_0_init(void)
+void I2C_0_init(void) {
-{
 	I2C_0_CLOCK_init();
 	i2c_m_sync_init(&I2C_0, SERCOM1);
 	I2C_0_PORT_init();
 }
 
-void delay_driver_init(void)
+void delay_driver_init(void) {
-{
 	delay_init(SysTick);
 }
 
-void PWM_0_PORT_init(void)
+void PWM_0_PORT_init(void) {
-{
-
 	gpio_set_pin_function(RED, PINMUX_PA20E_TC3_WO0);
-
 	gpio_set_pin_function(GREEN, PINMUX_PA21E_TC3_WO1);
 }
 
-void PWM_0_CLOCK_init(void)
+void PWM_0_CLOCK_init(void) {
-{
 	hri_mclk_set_APBCMASK_TC3_bit(MCLK);
 	hri_gclk_write_PCHCTRL_reg(GCLK, TC3_GCLK_ID, CONF_GCLK_TC3_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
 }
 
-void PWM_0_init(void)
+void PWM_0_init(void) {
-{
 	PWM_0_CLOCK_init();
 	PWM_0_PORT_init();
 	pwm_init(&PWM_0, TC3, _tc_get_pwm());
 }
 
-void PWM_1_PORT_init(void)
+void PWM_1_PORT_init(void) {
-{
-
 	gpio_set_pin_function(BUZZER, PINMUX_PA27F_TCC0_WO5);
 }
 
-void PWM_1_CLOCK_init(void)
+void PWM_1_CLOCK_init(void) {
-{
 	hri_mclk_set_APBCMASK_TCC0_bit(MCLK);
 	hri_gclk_write_PCHCTRL_reg(GCLK, TCC0_GCLK_ID, CONF_GCLK_TCC0_SRC | (1 << GCLK_PCHCTRL_CHEN_Pos));
 }
 
-void PWM_1_init(void)
+void PWM_1_init(void) {
-{
 	PWM_1_CLOCK_init();
 	PWM_1_PORT_init();
 	pwm_init(&PWM_1, TCC0, _tcc_get_pwm());
 }
 
-void SEGMENT_LCD_0_PORT_init(void)
+void SEGMENT_LCD_0_PORT_init(void) {
-{
-
 	gpio_set_pin_function(COM0, PINMUX_PB06B_SLCD_LP0);
-
 	gpio_set_pin_function(COM1, PINMUX_PB07B_SLCD_LP1);
-
 	gpio_set_pin_function(COM2, PINMUX_PB08B_SLCD_LP2);
-
 	gpio_set_pin_function(SEG0, PINMUX_PB09B_SLCD_LP3);
-
 	gpio_set_pin_function(SEG1, PINMUX_PA04B_SLCD_LP4);
-
 	gpio_set_pin_function(SEG2, PINMUX_PA05B_SLCD_LP5);
-
 	gpio_set_pin_function(SEG3, PINMUX_PA06B_SLCD_LP6);
-
 	gpio_set_pin_function(SEG4, PINMUX_PA07B_SLCD_LP7);
-
 	gpio_set_pin_function(SEG5, PINMUX_PA08B_SLCD_LP11);
-
 	gpio_set_pin_function(SEG6, PINMUX_PA09B_SLCD_LP12);
-
 	gpio_set_pin_function(SEG7, PINMUX_PA10B_SLCD_LP13);
-
 	gpio_set_pin_function(SEG8, PINMUX_PA11B_SLCD_LP14);
-
 	gpio_set_pin_function(SEG9, PINMUX_PB11B_SLCD_LP21);
-
 	gpio_set_pin_function(SEG10, PINMUX_PB12B_SLCD_LP22);
-
 	gpio_set_pin_function(SEG11, PINMUX_PB13B_SLCD_LP23);
-
 	gpio_set_pin_function(SEG12, PINMUX_PB14B_SLCD_LP24);
-
 	gpio_set_pin_function(SEG13, PINMUX_PB15B_SLCD_LP25);
-
 	gpio_set_pin_function(SEG14, PINMUX_PA12B_SLCD_LP28);
-
 	gpio_set_pin_function(SEG15, PINMUX_PA13B_SLCD_LP29);
-
 	gpio_set_pin_function(SEG16, PINMUX_PA14B_SLCD_LP30);
-
 	gpio_set_pin_function(SEG17, PINMUX_PA15B_SLCD_LP31);
-
 	gpio_set_pin_function(SEG18, PINMUX_PA16B_SLCD_LP32);
-
 	gpio_set_pin_function(SEG19, PINMUX_PA17B_SLCD_LP33);
-
 	gpio_set_pin_function(SEG20, PINMUX_PA18B_SLCD_LP34);
-
 	gpio_set_pin_function(SEG21, PINMUX_PA19B_SLCD_LP35);
-
 	gpio_set_pin_function(SEG22, PINMUX_PB16B_SLCD_LP42);
-
 	gpio_set_pin_function(SEG23, PINMUX_PB17B_SLCD_LP43);
 }
+
 /**
  * \brief SLCD initialization function
  *
  * Enables SLCD peripheral, clocks and initializes SLCD driver
  */
-void SEGMENT_LCD_0_init(void)
+void SEGMENT_LCD_0_init(void) {
-{
 	hri_mclk_set_APBCMASK_SLCD_bit(SLCD);
 	slcd_sync_init(&SEGMENT_LCD_0, SLCD);
 	SEGMENT_LCD_0_PORT_init();

Sensor Watch Starter Project/hw/watch.c

@@ -7,19 +7,17 @@
 
 #include "watch.h"
 #include <stdlib.h>
-#include <string.h>
 
-void watch_init(Watch *watch) {
+void watch_init() {
-	memset(watch, 0, sizeof(*watch));
 	// use switching regulator
 	SUPC->VREG.bit.SEL = 1;
 	while(!SUPC->STATUS.bit.VREGRDY);
-	// TODO: use performance level 0
+	// TODO: use performance level 0?
 //	_set_performance_level(0);
 //	hri_pm_write_PLCFG_PLDIS_bit(PM, true);
 }
 
-const uint8_t Character_Set[] =
+static const uint8_t Character_Set[] =
 {
     0b00000000, //  
     0b00000000, // !
@@ -118,10 +116,7 @@ const uint8_t Character_Set[] =
     0b00000001, // ~
 };
 
-void watch_enable_display(Watch *watch) {
+static const uint64_t Segment_Map[] = {
-	if (watch->display_enabled) return;
-
-	static const uint64_t segmap[] = {
     0x4e4f0e8e8f8d4d0d, // Position 8
     0xc8c4c4c8b4b4b0b,  // Position 9
     0xc049c00a49890949, // Position 6
@@ -132,25 +127,25 @@ void watch_enable_display(Watch *watch) {
     0xc041804000018a81, // Position 3
     0xc043420203048382, // Position 4
     0xc045440506468584, // Position 5
-	};
+};
-	watch->num_chars = 10;
-	watch->segment_map = &segmap[0];
 
+static const uint8_t Num_Chars = 10;
+
+void watch_enable_display() {
 	SEGMENT_LCD_0_init();
 	slcd_sync_enable(&SEGMENT_LCD_0);
-	watch->display_enabled = true;
 }
 
-void watch_display_pixel(Watch *watch, uint8_t com, uint8_t seg) {
+void watch_display_pixel(uint8_t com, uint8_t seg) {
 	slcd_sync_seg_on(&SEGMENT_LCD_0, SLCD_SEGID(com, seg));
 }
 
-void watch_clear_pixel(Watch *watch, uint8_t com, uint8_t seg) {
+void watch_clear_pixel(uint8_t com, uint8_t seg) {
 	slcd_sync_seg_off(&SEGMENT_LCD_0, SLCD_SEGID(com, seg));
 }
 
-void watch_display_character(Watch *watch, uint8_t character, uint8_t position) {
+void watch_display_character(uint8_t character, uint8_t position) {
-	uint64_t segmap = watch->segment_map[position];
+	uint64_t segmap = Segment_Map[position];
 	uint64_t segdata = Character_Set[character - 0x20];
 
 	for (int i = 0; i < 8; i++) {
@@ -169,43 +164,40 @@ void watch_display_character(Watch *watch, uint8_t character, uint8_t position)
 	}
 }
 
-void watch_display_string(Watch *watch, char *string, uint8_t position) {
+void watch_display_string(char *string, uint8_t position) {
 	size_t i = 0;
 	while(string[i] != 0) {
-		watch_display_character(watch, string[i], position + i);
+		watch_display_character(string[i], position + i);
 		i++;
-		if (i >= watch->num_chars) break;
+		if (i >= Num_Chars) break;
 	}
 }
 
-void watch_enable_buttons(Watch *watch) {
+void watch_enable_buttons() {
 	EXTERNAL_IRQ_0_init();
 }
 
-void watch_register_button_callback(Watch *watch, const uint32_t pin, ext_irq_cb_t callback) {
+void watch_register_button_callback(const uint32_t pin, ext_irq_cb_t callback) {
 	ext_irq_register(pin, callback);
 }
 
-void watch_enable_led(Watch *watch) {
+static bool PWM_0_enabled = false;
-	if (watch->led_enabled) return;
 
-	PWM_0_init();
+void watch_enable_led() {
+    if (!PWM_0_enabled) PWM_0_init();
+    PWM_0_enabled = true;
 	pwm_set_parameters(&PWM_0, 10000, 0);
 	pwm_enable(&PWM_0);
 	
-	watch->led_enabled = true;
 	watch_set_led_off();
 }
 
-void watch_disable_led(Watch *watch) {
+void watch_disable_led() {
-	if (!watch->led_enabled) return;
-
 	gpio_set_pin_function(RED, GPIO_PIN_FUNCTION_OFF);
 	gpio_set_pin_function(GREEN, GPIO_PIN_FUNCTION_OFF);
 
 	pwm_disable(&PWM_0);
-	
+    PWM_0_enabled = false;
-	watch->led_enabled = false;
 }
 
 void watch_set_led_color(uint16_t red, uint16_t green) {
@@ -225,12 +217,9 @@ void watch_set_led_off() {
 	watch_set_led_color(0, 0);
 }
 
-void watch_enable_date_time(Watch *watch) {
+void watch_enable_date_time() {
-	if (watch->calendar_enabled) return;
 	CALENDAR_0_init();
 	calendar_enable(&CALENDAR_0);
-	
-	watch->calendar_enabled = true;
 }
 
 void watch_set_date_time(struct calendar_date_time date_time) {
@@ -248,15 +237,19 @@ static void tick_callback(struct calendar_dev *const dev) {
 	tick_user_callback();
 }
 
-void watch_enable_tick(ext_irq_cb_t callback) {
+void watch_enable_tick_callback(ext_irq_cb_t callback) {
 	tick_user_callback = callback;
 	// TODO: rename this method to reflect that it now sets the PER7 interrupt.
 	_tamper_register_callback(&CALENDAR_0.device, &tick_callback);
 }
 
-void watch_enable_analog(Watch *watch, const uint8_t pin) {
+static bool ADC_0_ENABLED = false;
-	if (!watch->adc_enabled) ADC_0_init();
 
+void watch_enable_analog(const uint8_t pin) {
+	if (!ADC_0_ENABLED) ADC_0_init();
+    ADC_0_ENABLED = true;
+
+	gpio_set_pin_direction(pin, GPIO_DIRECTION_OFF);
 	switch (pin) {
 		case A0:
 			gpio_set_pin_function(A0, PINMUX_PB04B_ADC_AIN12);
@@ -270,7 +263,6 @@ void watch_enable_analog(Watch *watch, const uint8_t pin) {
 		default:
 			return;
 	}
-	gpio_set_pin_direction(pin, GPIO_DIRECTION_OFF);
 }
 
 void watch_enable_digital_input(const uint8_t pin) {
@@ -278,15 +270,30 @@ void watch_enable_digital_input(const uint8_t pin) {
 	gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF);
 }
 
+void watch_enable_pull_up(const uint8_t pin) {
+    gpio_set_pin_pull_mode(pin, GPIO_PULL_UP);
+}
+
+void watch_enable_pull_down(const uint8_t pin) {
+    gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN);
+}
+
+bool watch_get_pin_level(const uint8_t pin, const bool level) {
+    return gpio_get_pin_level(pin);
+}
+
 void watch_enable_digital_output(const uint8_t pin) {
 	gpio_set_pin_direction(pin, GPIO_DIRECTION_OUT);
 	gpio_set_pin_function(pin, GPIO_PIN_FUNCTION_OFF);
 }
 
+void watch_set_pin_level(const uint8_t pin, const bool level) {
+    gpio_set_pin_level(pin, level);
+}
+
 struct io_descriptor *I2C_0_io;
 
-void watch_enable_i2c(Watch *watch) {
+void watch_enable_i2c() {
-	if (watch->i2c_enabled) return;
 	I2C_0_init();
 	i2c_m_sync_get_io_descriptor(&I2C_0, &I2C_0_io);
 	i2c_m_sync_enable(&I2C_0);

Sensor Watch Starter Project/hw/watch.h

@@ -13,50 +13,41 @@
 #include "hpl_calendar.h"
 #include "hal_ext_irq.h"
 
-typedef struct Watch {
+void watch_init();
-	bool display_enabled;
-	bool led_enabled;
-	bool buzzer_enabled;
-	bool calendar_enabled;
-	bool adc_enabled;
-	bool i2c_enabled;
-	bool spi_enabled;
-	bool eic_enabled;
 
-	uint8_t num_chars;
+void watch_enable_display();
-	const uint64_t* segment_map;
+void watch_display_pixel(uint8_t com, uint8_t seg);
-} Watch;
+void watch_display_string(char *string, uint8_t position);
 
-void watch_init(Watch *watch);
+void watch_enable_led();
-
+void watch_disable_led();
-void watch_enable_display(Watch *watch);
-void watch_display_pixel(Watch *watch, uint8_t com, uint8_t seg);
-void watch_display_string(Watch *watch, char *string, uint8_t position);
-
-void watch_enable_led(Watch *watch);
-void watch_disable_led(Watch *watch);
 void watch_set_led_color(uint16_t red, uint16_t green);
 void watch_set_led_red();
 void watch_set_led_green();
 void watch_set_led_off();
 
-void watch_enable_date_time(Watch *watch);
+void watch_enable_date_time();
 void watch_set_date_time(struct calendar_date_time date_time);
 void watch_get_date_time(struct calendar_date_time *date_time);
 
-void watch_enable_tick(ext_irq_cb_t callback);
+void watch_enable_tick_callback(ext_irq_cb_t callback);
 
-void watch_enable_analog(Watch *watch, const uint8_t pin);
+void watch_enable_analog(const uint8_t pin);
 
-void watch_enable_buttons(Watch *watch);
+void watch_enable_buttons();
-void watch_register_button_callback(Watch *watch, const uint32_t pin, ext_irq_cb_t callback);
+void watch_register_button_callback(const uint32_t pin, ext_irq_cb_t callback);
 
 void watch_enable_digital_input(const uint8_t pin);
+void watch_enable_pull_up(const uint8_t pin);
+void watch_enable_pull_down(const uint8_t pin);
+bool watch_get_pin_level(const uint8_t pin, const bool level);
+
 void watch_enable_digital_output(const uint8_t pin);
+void watch_set_pin_level(const uint8_t pin, const bool level);
 
 struct io_descriptor *I2C_0_io;
 
-void watch_enable_i2c(Watch *watch);
+void watch_enable_i2c();
 void watch_i2c_send(int16_t addr, uint8_t *buf, uint16_t length);
 void watch_i2c_receive(int16_t addr, uint8_t *buf, uint16_t length);
 

Sensor Watch Starter Project/main.c

@@ -39,13 +39,12 @@
 #include "hal_gpio.h"
 #include "atmel_start_pins.h"
 #include "watch.h"
+#include "app.h"
 
 //-----------------------------------------------------------------------------
 HAL_GPIO_PIN(UART_TX,   B, 0)
 HAL_GPIO_PIN(UART_RX,   B, 2)
 
-Watch watch;
-
 //-----------------------------------------------------------------------------
 static void uart_init(uint32_t baud) {
     uint64_t br = (uint64_t)65536 * (CONF_CPU_FREQUENCY - 16 * baud) / CONF_CPU_FREQUENCY;
@@ -73,52 +72,35 @@ static void uart_init(uint32_t baud) {
 }
 
 //-----------------------------------------------------------------------------
-static void uart_putc(char c) {
+void uart_putc(char c) {
     while (!(SERCOM3->USART.INTFLAG.reg & SERCOM_USART_INTFLAG_DRE));
     SERCOM3->USART.DATA.reg = c;
 }
 
 //-----------------------------------------------------------------------------
-static void uart_puts(char *s) {
+void uart_puts(char *s) {
     while (*s) uart_putc(*s++);
 }
 
 //-----------------------------------------------------------------------------
 static void sys_init(void) {
+    uart_puts("init_mcu\n");
 	init_mcu();
-    watch_init(&watch);
+    uart_puts("watch_init\n");
-    watch_enable_display(&watch);
+    watch_init();
-    watch_enable_led(&watch);
+    uart_puts("app_init\n");
-    watch_enable_date_time(&watch);
+    app_init();
-    watch_enable_analog(&watch, A0);
-    watch_enable_buttons(&watch);
-    watch_enable_i2c(&watch);
 }
 
 //-----------------------------------------------------------------------------
 int main(void) {
-    sys_init();
     uart_init(115200);
+    sys_init();
 
-    char buf[20] = {0};
-
-    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");
-	uint8_t chip_id_cmd = 0xD0;
-	uint8_t chip_id = 0;
-	watch_i2c_send(0x77, &chip_id_cmd, 1);
-    uart_puts("Chip ID... ");
-	watch_i2c_receive(0x77, &chip_id, 1);
-    uart_puts("received!\n");
-    sprintf(buf, "Chip ID is %#02x", chip_id);
-    uart_puts(buf);
-    uart_puts("\nDone\n");
-
-    uint16_t red = 0;
-    uint16_t green = 0;
     while (1) {
+        app_loop();
+        app_prepare_for_sleep();
+        sleep(4);
     }
 
     return 0;

Sensor Watch Starter Project/make/Makefile

@@ -56,6 +56,7 @@ INCLUDES += \
   -I../hri/ \
   -I../config/ \
   -I../hw/ \
+  -I../app/ \
   -I..
 
 SRCS += \
@@ -63,6 +64,7 @@ SRCS += \
   ../startup_saml22.c \
   ../hw/driver_init.c \
   ../hw/watch.c \
+  ../app/app.c \
   ../hal/src/hal_adc_sync.c \
   ../hal/src/hal_atomic.c \
   ../hal/src/hal_calendar.c \