/**
* \brief Test MCP980X
*
* This test reads temperature values returned by MCP980X every 100ms and check if the temperature is delightful.
*
* \param test Current test case.
*/
static void run_mcp980x_test(const struct test_case *test)
{
/* Initialize MCP980X driver. */
mcp980x_init();
/* Set MCP980X configuration.
* Disable ONE-SHOT mode;
* 12-bit ADC resolution;
* 2 fault queue cycles;
* Active-high alert polarity;
* Alert output in interrupt mode;
* Disable shutdown mode.
*/
mcp980x_set_configuration(
MCP980X_CONFIG_RESOLUTION_12_BIT |
MCP980X_CONFIG_FAULT_QUEUE_2 |
MCP980X_CONFIG_ALERT_POLARITY_ACTIVE_HIGH |
MCP980X_CONFIG_INTERRUPT_MODE);
uint32_t i = 0;
uint32_t ul_unused = 0;
for (; i < MCP980X_MAX_SAMPLES; i++) {
/* Enable One-Shot mode to perform a single temperature measurement. */
if (TWI_SUCCESS != mcp980x_one_shot_mode()) {
mcp980x_test_flag = 1;
break;
}
/* Retrieve ambient temperature every 100ms. */
mdelay(100);
if (TWI_SUCCESS != mcp980x_get_temperature(&temp_buf[i], &ul_unused)) {
mcp980x_test_flag = 1;
break;
}
}
/* Test1: if TWI bus operation is successful */
test_assert_true(test, mcp980x_test_flag == 0, "Test1: TWI bus operation is aborted!");
/* Test2: if the temperature values returned are correct */
for (i = 0; i < MCP980X_MAX_SAMPLES; i++) {
if ((temp_buf[i] > MCP980X_HIGHEST_TEMP) || (temp_buf[i] < MCP980X_LOWEST_TEMP)) {
mcp980x_test_flag = 1;
break;
}
}
test_assert_true(test, mcp980x_test_flag == 0, "Test2: The temperature is undelightful!");
/* Test3: if the temperature change is reasonable */
volatile int8_t temp_delta = 0;
for (i = 0; i < (MCP980X_MAX_SAMPLES - 1); i++) {
temp_delta = (temp_buf[i] > temp_buf[i + 1]) ?
(temp_buf[i] - temp_buf[i + 1]) : (temp_buf[i + 1] - temp_buf[i]);
if (temp_delta > MCP980X_TEMP_DELTA) {
mcp980x_test_flag = 1;
break;
}
}
test_assert_true(test, mcp980x_test_flag == 0, "Test3: The temperature change is unreasonable!");
}
/**
* \brief Application entry point for TWI temperature sensor example.
*
* \return Unused (ANSI-C compatibility).
*/
int main(void)
{
int8_t temperature_int = 0;
uint32_t temperature_dec = 0;
/* Initialize the SAM system */
sysclk_init();
board_init();
/* Initialize the console UART */
configure_console();
/* Output example information */
puts(STRING_HEADER);
/* Configure systick for 1 ms */
printf("Configure system tick to get 1ms tick period.\n\r");
if (SysTick_Config(sysclk_get_cpu_hz() / 1000)) {
printf("-E- Systick configuration error\n\r");
while (1) {
/* Capture error */
}
}
/* Initialize MCP980X driver. */
mcp980x_init();
/* Set MCP980X configuration.
* Disable ONE-SHOT mode;
* 12-bit ADC resolution;
* 2 fault queue cycles;
* Active-high alert polarity;
* Alert output in interrupt mode;
* Disable shutdown mode.
*/
mcp980x_set_configuration(
MCP980X_CONFIG_RESOLUTION_12_BIT |
MCP980X_CONFIG_FAULT_QUEUE_2 |
MCP980X_CONFIG_ALERT_POLARITY_ACTIVE_HIGH |
MCP980X_CONFIG_INTERRUPT_MODE);
/* Set temperature limit and then get it. */
mcp980x_set_temperature_limit(TEMP_LIMIT_MAX, TEMP_LIMIT_DEC);
mcp980x_get_temperature_limit(&temperature_int, &temperature_dec);
printf("Temperature Limit: %d.%04lu\r\n", temperature_int,
(unsigned long)temperature_dec);
/* Set temperature hysteresis and then get it. */
mcp980x_set_temperature_hysteresis(TEMP_LIMIT_MIN, TEMP_LIMIT_DEC);
mcp980x_get_temperature_hysteresis(&temperature_int, &temperature_dec);
printf("Temperature Hysteresis: %d.%04lu\r\n", temperature_int,
(unsigned long)temperature_dec);
while (1) {
/* Enable One-Shot mode to perform a single temperature measurement. */
if (TWI_SUCCESS != mcp980x_one_shot_mode()) {
break;
}
/* Retrieve ambient temperature every second and print it. */
mdelay(1000);
if (TWI_SUCCESS !=
mcp980x_get_temperature(&temperature_int,
&temperature_dec)) {
break;
}
printf("Ambient Temperature: %d.%04lu\r\n", temperature_int,
(unsigned long)temperature_dec);
}
printf("TWI bus operation error!\r\n");
while (1) {
/* Do nothing */
}
}