/**
* \brief The main application.
*/
int main(void)
{
uint8_t i;
uint8_t temperature[BUFFER_SIZE];
uint8_t light[BUFFER_SIZE];
char value_disp[5];
uint32_t adc_value;
uint32_t light_value;
double temp;
/* Initialize clocks. */
sysclk_init();
/* Initialize GPIO states. */
board_init();
/* Configure ADC for light sensor. */
configure_adc();
/* Initialize at30tse. */
at30tse_init();
/* Configure IO1 buttons. */
configure_buttons();
/* Initialize SPI and SSD1306 controller. */
ssd1306_init();
ssd1306_clear();
/* Clear internal buffers. */
for (i = 0; i < BUFFER_SIZE; ++i) {
temperature[i] = 0;
light[i] = 0;
}
/* Show the start info. */
multi_language_show_start_info();
/* Wait 3 seconds to show the above message. */
delay_s(3);
/* Check for valid firmware in SD card. */
check_valid_firmware();
while (true) {
/* Set the trigger and jump to bootloader */
if (reset_flag) {
jump_to_bootloader();
}
/* Refresh page title only if necessary. */
if (app_mode_switch > 0) {
app_mode = (app_mode + 1) % 3;
/* Clear screen. */
ssd1306_clear();
ssd1306_set_page_address(0);
ssd1306_set_column_address(0);
if (app_mode == 0) {
/* Temperature mode. */
ioport_set_pin_level(OLED1_LED1_PIN, OLED1_LED1_ACTIVE);
ioport_set_pin_level(OLED1_LED2_PIN, !OLED1_LED2_ACTIVE);
ioport_set_pin_level(OLED1_LED3_PIN, !OLED1_LED3_ACTIVE);
multi_language_show_temperature_info();
} else if (app_mode == 1) {
/* Light mode. */
ioport_set_pin_level(OLED1_LED2_PIN, OLED1_LED2_ACTIVE);
ioport_set_pin_level(OLED1_LED1_PIN, !OLED1_LED1_ACTIVE);
ioport_set_pin_level(OLED1_LED3_PIN, !OLED1_LED3_ACTIVE);
multi_language_show_light_info();
} else {
/* SD mode. */
ioport_set_pin_level(OLED1_LED3_PIN, OLED1_LED3_ACTIVE);
ioport_set_pin_level(OLED1_LED1_PIN, !OLED1_LED1_ACTIVE);
ioport_set_pin_level(OLED1_LED2_PIN, !OLED1_LED2_ACTIVE);
sd_listing_pos = 0;
/* Show SD card info. */
display_sd_info();
}
app_mode_switch = 0;
}
/* Shift graph buffers. */
for (i = 0; i < (BUFFER_SIZE - 1); ++i) {
temperature[i] = temperature[i + 1];
light[i] = light[i + 1];
}
/* Get temperature. */
if (at30tse_read_temperature(&temp) == TWI_SUCCESS) {
/* Don't care about negative temperature. */
if (temp < 0) {
temp = 0;
}
/* Update temperature for display. */
/* Note: rescale to 0~24 for better rendering. */
if (temp > 40) {
temperature[BUFFER_SIZE - 1] = 24;
} else {
temperature[BUFFER_SIZE - 1] = (uint8_t)temp * 24 / 40;
}
} else {
/* Error print zero values. */
temperature[BUFFER_SIZE - 1] = 0;
}
/* Get light sensor information. */
/* Rescale to 0~24 for better rendering. */
adc_start_software_conversion(ADC);
adc_value = adc_channel_get_value(ADC, ADC_CHANNEL_0);
light[BUFFER_SIZE - 1] = 24 - adc_value * 24 / 1024;
if (app_mode == 0) {
/* Display temperature in text format. */
sprintf(value_disp, "%d", (uint8_t)temp);
ssd1306_set_column_address(98);
ssd1306_write_command(SSD1306_CMD_SET_PAGE_START_ADDRESS(0));
ssd1306_write_text(" ");
/* Avoid character overlapping. */
if (temp < 10) {
ssd1306_clear_char();
}
ssd1306_write_text(value_disp);
/* Display degree symbol. */
ssd1306_write_data(0x06);
ssd1306_write_data(0x06);
ssd1306_write_text("c");
/* Refresh graph. */
ssd1306_draw_graph(0, 2, BUFFER_SIZE, 2, temperature);
} else if (app_mode == 1) {
light_value = 100 - (adc_value * 100 / 1024);
sprintf(value_disp, "%lu", light_value);
ssd1306_set_column_address(98);
ssd1306_write_command(SSD1306_CMD_SET_PAGE_START_ADDRESS(0));
ssd1306_write_text(" ");
/* Avoid character overlapping. */
if (light_value < 10) {
ssd1306_clear_char();
}
ssd1306_write_text(value_disp);
ssd1306_write_text("%");
/* Avoid character overlapping. */
if (light_value < 100) {
ssd1306_clear_char();
}
/* Refresh graph. */
ssd1306_draw_graph(0, 2, BUFFER_SIZE, 2, light);
} else {
/**
* Refresh screen if card was inserted/removed or
* browsing content.
*/
if (sd_update == 1) {
/* Clear screen. */
ssd1306_clear();
ssd1306_set_page_address(0);
ssd1306_set_column_address(0);
if (sd_listing_pos == 0) {
/* Show SD card info. */
display_sd_info();
} else {
/* List SD card files. */
display_sd_files_unicode();
}
sd_update = 0;
}
}
/* Wait and stop screen flickers. */
delay_ms(150);
if (app_mode_switch == 0) {
pio_enable_interrupt(OLED1_PIN_PUSHBUTTON_1_PIO,
OLED1_PIN_PUSHBUTTON_1_MASK);
}
if (sd_update == 0) {
pio_enable_interrupt(OLED1_PIN_PUSHBUTTON_2_PIO,
OLED1_PIN_PUSHBUTTON_2_MASK);
pio_enable_interrupt(OLED1_PIN_PUSHBUTTON_3_PIO,
OLED1_PIN_PUSHBUTTON_3_MASK);
}
}
}
int main(void)
{
uint8_t i;
uint8_t temperature[BUFFER_SIZE];
uint8_t light[BUFFER_SIZE];
uint8_t value_disp[5];
uint32_t adc_value;
double temp;
// Initialize clocks.
sysclk_init();
// Initialize GPIO states.
board_init();
// Configure ADC for light sensor.
configure_adc();
// Initialize at30tse.
at30tse_init();
// Configure IO1 buttons.
configure_buttons();
// Initialize SPI and SSD1306 controller.
ssd1306_init();
ssd1306_clear();
// Clear internal buffers.
for (i = 0; i < BUFFER_SIZE; ++i)
{
temperature[i] = 0;
light[i] = 0;
}
while (true)
{
/* Refresh page title only if necessary. */
if (app_mode_switch > 0)
{
app_mode = app_mode_switch - 1;
// Clear screen.
ssd1306_clear();
ssd1306_set_page_address(0);
ssd1306_set_column_address(0);
/* Temperature mode. */
if (app_mode == 0)
{
ioport_set_pin_level(IO1_LED1_PIN, IO1_LED1_ACTIVE);
ioport_set_pin_level(IO1_LED2_PIN, !IO1_LED2_ACTIVE);
ioport_set_pin_level(IO1_LED3_PIN, !IO1_LED3_ACTIVE);
ssd1306_write_text("Temperature sensor:");
}
/* Light mode. */
else if (app_mode == 1)
{
ioport_set_pin_level(IO1_LED2_PIN, IO1_LED2_ACTIVE);
ioport_set_pin_level(IO1_LED1_PIN, !IO1_LED1_ACTIVE);
ioport_set_pin_level(IO1_LED3_PIN, !IO1_LED3_ACTIVE);
ssd1306_write_text("Light sensor:");
}
/* SD mode. */
else
{
ioport_set_pin_level(IO1_LED3_PIN, IO1_LED3_ACTIVE);
ioport_set_pin_level(IO1_LED1_PIN, !IO1_LED1_ACTIVE);
ioport_set_pin_level(IO1_LED2_PIN, !IO1_LED2_ACTIVE);
display_sd_info();
}
app_mode_switch = 0;
}
// Shift graph buffers.
for (i = 0; i < BUFFER_SIZE - 1; ++i)
{
temperature[i] = temperature[i + 1];
light[i] = light[i + 1];
}
// Get temperature in a range from 0 to 40 degrees.
if (at30tse_read_temperature(&temp) == TWI_SUCCESS)
{
// Don't care about negative temperature.
if (temp < 0)
temp = 0;
// Update temperature for display.
// Note: -12 in order to rescale for better rendering.
if (temp < 12)
temperature[BUFFER_SIZE - 1] = 0;
else
temperature[BUFFER_SIZE - 1] = temp - 12;
}
else
{
// Error print zero values.
temperature[BUFFER_SIZE - 1] = 0;
}
// Get light sensor information.
// Rescale for better rendering.
adc_start(ADC);
adc_value = adc_get_channel_value(ADC, ADC_CHANNEL_4);
light[BUFFER_SIZE - 1] = 24 - adc_value * 24 / 4096;
// Print temperature in text format.
if (app_mode == 0)
{
sprintf(value_disp, "%d", (uint8_t)temp);
ssd1306_set_column_address(95);
ssd1306_write_command(SSD1306_CMD_SET_PAGE_START_ADDRESS(0));
ssd1306_write_text(" ");
ssd1306_write_text(value_disp);
// Display degree symbol.
ssd1306_write_data(0x06);
ssd1306_write_data(0x06);
ssd1306_write_text("c");
// Refresh graph.
ssd1306_draw_graph(0, 1, BUFFER_SIZE, 3, temperature);
}
else if (app_mode == 1)
{
sprintf(value_disp, "%lu", 100 - (adc_value * 100 / 4096));
ssd1306_set_column_address(98);
ssd1306_write_command(SSD1306_CMD_SET_PAGE_START_ADDRESS(0));
ssd1306_write_text(" ");
ssd1306_write_text(value_disp);
ssd1306_write_text("%");
// Refresh graph.
ssd1306_draw_graph(0, 1, BUFFER_SIZE, 3, light);
}
else
{
// Is card has been inserted or removed?
if (sd_status_update == 1)
{
// Clear screen.
ssd1306_clear();
ssd1306_set_page_address(0);
ssd1306_set_column_address(0);
// Show SD card info.
display_sd_info();
sd_status_update = 0;
}
}
/* Wait and stop screen flickers. */
delay_ms(50);
}
}