/** \brief This function puts all devices to sleep.
*/
void sha204_sleep_all(void)
{
uint8_t i;
for (i = 1; i < SHA204_DEVICE_COUNT; i++) {
sha204p_set_device_id(sha204_i2c_address(i));
// Send Sleep command.
sha204p_sleep();
}
}
uint8_t atsha204Class::sha204c_resync(uint8_t size, uint8_t *response)
{
// Try to re-synchronize without sending a Wake token
// (step 1 of the re-synchronization process).
uint8_t ret_code = sha204p_resync(size, response);
if (ret_code == SHA204_SUCCESS)
return ret_code;
// We lost communication. Send a Wake pulse and try
// to receive a response (steps 2 and 3 of the
// re-synchronization process).
(void)sha204p_sleep();
ret_code = sha204c_wakeup(response);
// Translate a return value of success into one
// that indicates that the device had to be woken up
// and might have lost its TempKey.
return (ret_code == SHA204_SUCCESS ? SHA204_RESYNC_WITH_WAKEUP : ret_code);
}
/**
* \brief This function runs a SHA204 Wakeup / Sleep test.
*
* This test wakes up the device, reads its Wakeup response,
* and sends a Sleep command. It then sends a command and
* expects a response timeout to verify that the device has
* gone to sleep.
*
* \param test current test case
*/
static void test_sha204_wakeup(const struct test_case *test)
{
uint8_t sha204_status = SHA204_SUCCESS;
// Catch watchdog timeout in case no Security Xplained board is connected.
if ((reset_cause_get_causes() & CHIP_RESET_CAUSE_WDT) != CHIP_RESET_CAUSE_WDT) {
reset_cause_clear_causes(CHIP_RESET_CAUSE_POR |
CHIP_RESET_CAUSE_EXTRST |
CHIP_RESET_CAUSE_BOD_CPU |
CHIP_RESET_CAUSE_OCD |
CHIP_RESET_CAUSE_SOFT | CHIP_RESET_CAUSE_SPIKE);
} else {
wdt_disable();
reset_cause_clear_causes(CHIP_RESET_CAUSE_WDT);
test_assert_false(test, sha204_status == SHA204_SUCCESS, "No Device.");
return;
}
/* Start watchdog timer. */
wdt_set_timeout_period(WDT_TIMEOUT_PERIOD_250CLK); // 250 ms
wdt_enable();
uint8_t response[DEVREV_RSP_SIZE];
success = false;
sha204_status = sha204c_wakeup(response);
// The TWI_M driver is not hanging. We can disable the watchdog now.
wdt_disable();
test_assert_true(test, sha204_status == SHA204_SUCCESS, "Sending Wakeup token failed.");
sha204_status = sha204p_sleep();
test_assert_true(test, sha204_status == SHA204_SUCCESS, "Sending Sleep command failed.");
// Make sure the device is asleep. The code below works only for TWI, not for SWI,
// because there is no acknowledging of a TWI address for SWI.
uint8_t command[DEVREV_COUNT] = {DEVREV_COUNT, SHA204_DEVREV, 0, 0, 0, 0x03, 0x5d};
sha204_status = sha204p_send_command(sizeof(command), command);
test_assert_false(test, sha204_status == SHA204_SUCCESS, "Device is not asleep.");
success = true;
}
/**
* \brief This function runs a SHA204 Read test on all four devices.
*
* This test wakes up the devices, reads their TWI addresses from
* their Config zone, and sends them back to sleep. The test fails if
* there are communication failures or the TWI addresses do not match.
*
* \param test current test case
*/
static void test_all_devices(const struct test_case *test)
{
test_assert_true(test, success, "Previous test failed.");
success = false;
uint8_t sha204_status;
uint8_t i;
uint8_t twi_address;
uint8_t twi_address_retrieved = 0;
uint8_t command[READ_COUNT];
uint8_t response[READ_4_RSP_SIZE];
sha204_status = sha204p_wakeup();
test_assert_true(test, sha204_status == SHA204_SUCCESS, "Sending Wakeup token failed.");
// Address 16 holds the TWI address.
struct sha204_read_parameters args =
{.tx_buffer = command, .rx_buffer = response, .zone = SHA204_ZONE_CONFIG, .address = 16};
// Read TWI address from all four devices that are mounted on the Security Xplained extension board.
for (i = 0; i < SHA204_DEVICE_COUNT; i++) {
twi_address = sha204_i2c_address(i);
sha204p_set_device_id(twi_address);
memset(response, 0, sizeof(response));
success = false;
sha204_status = sha204m_read(&args);
if (sha204_status != SHA204_SUCCESS)
break;
twi_address_retrieved = args.rx_buffer[SHA204_BUFFER_POS_DATA] & 0xFE;
if (twi_address_retrieved != twi_address)
break;
sha204_status = sha204p_sleep();
if (sha204_status != SHA204_SUCCESS)
break;
success = true;
}
// Sleep remaining devices in case one of them failed.
for (; i < SHA204_DEVICE_COUNT; i++) {
twi_address = sha204_i2c_address(i);
sha204p_set_device_id(twi_address);
sha204p_sleep();
}
test_assert_true(test, sha204_status == SHA204_SUCCESS, "Communication error.");
test_assert_true(test, twi_address_retrieved == twi_address, "TWI address does not match.");
success = true;
}
//! \name Unit test configuration
//@{
/**
* \def CONF_TEST_USART
* \brief USART to redirect STDIO to
*/
/**
* \def CONF_TEST_BAUDRATE
* \brief Baudrate of USART
*/
/**
* \def CONF_TEST_CHARLENGTH
* \brief Character length (bits) of USART
*/
/**
* \def CONF_TEST_PARITY
* \brief Parity mode of USART
*/
/**
* \def CONF_TEST_STOPBITS
* \brief Stop bit configuration of USART
*/
//@}
/**
* \brief This function runs ATSHA204 component unit tests.
*/
int main (void)
{
const usart_serial_options_t usart_serial_options =
{
.baudrate = CONF_TEST_BAUDRATE,
.charlength = CONF_TEST_CHARLENGTH,
.paritytype = CONF_TEST_PARITY,
.stopbits = CONF_TEST_STOPBITS,
};
sysclk_init();
board_init();
pmic_init();
sleepmgr_init();
stdio_serial_init(CONF_TEST_USART, &usart_serial_options);
// Enable low level interrupts
pmic_enable_level(PMIC_LVL_LOW);
// Enable interrupt requests
cpu_irq_enable();
// Define all the test cases
DEFINE_TEST_CASE(sha204_test1, NULL, test_sha204_wakeup, NULL,
"Testing Wakeup / Sleep");
DEFINE_TEST_CASE(sha204_test2, NULL, test_all_devices, NULL,
"Testing all devices");
// Put test case addresses in an array
DEFINE_TEST_ARRAY(sha204_tests) = {
&sha204_test1,
&sha204_test2
};
// Define the test suite
DEFINE_TEST_SUITE(sha204_suite, sha204_tests,
"XMEGA ATSHA204 component test suite");
// Run all tests in the test suite
test_suite_run(&sha204_suite);
while (1) {
// Loop for infinity
}
}
