/**
* \brief Test physical loop-back with some characters in sunc mode.
*
* This function sends a character over USART on loop back to verify that init
* and sending/receiving works. A jumper is connected on the USART.
*
* \param test Current test case.
*/
static void run_loopback_syncmode_test(const struct test_case *test)
{
uint8_t out_c = 'c';
uint8_t in_c = 0;
port_pin_t sck_pin;
sysclk_enable_module(POWER_RED_REG0, PRUSART0_bm);
usart_set_mode(&CONF_UNIT_USART, USART_CMODE_SYNCHRONOUS_gc);
sck_pin = IOPORT_CREATE_PIN(PORTE, 2);
ioport_configure_port_pin(ioport_pin_to_port(sck_pin),
ioport_pin_to_mask(sck_pin),
IOPORT_DIR_OUTPUT | IOPORT_INIT_HIGH );
usart_spi_set_baudrate(&CONF_UNIT_USART, CONF_UNIT_BAUDRATE,
sysclk_get_source_clock_hz());
usart_tx_enable(&CONF_UNIT_USART);
usart_rx_enable(&CONF_UNIT_USART);
usart_putchar(&CONF_UNIT_USART, out_c);
in_c = usart_getchar(&CONF_UNIT_USART);
test_assert_true(test, in_c == out_c,
"Read character through sync mode is not correct: %d != %d", in_c, out_c);
}
/**
* \brief Initialize USART in SPI master mode.
*
* This function initializes the USART module in SPI master mode using the
* usart_spi_options_t configuration structure and CPU frequency.
*
* \param usart The USART module.
* \param opt The RS232 configuration option.
*/
void usart_init_spi(USART_t *usart, const usart_spi_options_t *opt)
{
usart->UBRR = 0;
usart_enable_module_clock(usart);
usart_set_mode(usart, USART_CMODE_MSPI_gc);
if (opt->spimode == 1 || opt->spimode == 3) {
usart->UCSRnC |= USART_UCPHA_bm;
} else {
usart->UCSRnC &= ~USART_UCPHA_bm;
}
if (opt->spimode == 2 || opt->spimode == 3) {
usart->UCSRnC |= USART_UCPOL_bm;
} else {
usart->UCSRnC &= ~USART_UCPOL_bm;
}
if (opt->data_order) {
usart->UCSRnC |= USART_DORD_bm;
} else {
usart->UCSRnC &= ~USART_DORD_bm;
}
usart_spi_set_baudrate(usart, opt->baudrate,
sysclk_get_source_clock_hz());
usart_tx_enable(usart);
usart_rx_enable(usart);
}
/**
* \brief Initialize USART in RS232 mode.
*
* This function initializes the USART module in RS232 mode using the
* usart_rs232_options_t configuration structure and CPU frequency.
*
* \param usart The USART module.
* \param opt The RS232 configuration option.
*
* \retval true if the initialization was successful
* \retval false if the initialization failed (error in baud rate calculation)
*/
bool usart_init_rs232(USART_t *usart, const usart_rs232_options_t *opt)
{
bool result;
usart_enable_module_clock(usart);
usart_set_mode(usart, USART_CMODE_ASYNCHRONOUS_gc);
usart_format_set(usart, opt->charlength, opt->paritytype,
opt->stopbits);
result = usart_set_baudrate(usart, opt->baudrate,
sysclk_get_source_clock_hz());
usart_tx_enable(usart);
usart_rx_enable(usart);
return result;
}
/**
* \brief Initialize USART in SPI master mode.
*
* This function initializes the USART module in SPI master mode using the
* usart_spi_options_t configuration structure and CPU frequency.
*
* \param usart The USART module.
* \param opt The RS232 configuration option.
*/
void usart_init_spi(USART_t *usart, const usart_spi_options_t *opt)
{
usart->UBRR = 0;
usart_enable_module_clock(usart);
usart_set_mode(usart, USART_CMODE_MSPI_gc);
port_pin_t sck_pin;
#ifdef USARTA0
if ((uintptr_t)usart == (uintptr_t)&UCSR0A) {
sck_pin = IOPORT_CREATE_PIN(PORTE, 2);
ioport_configure_port_pin(ioport_pin_to_port(sck_pin),
ioport_pin_to_mask(sck_pin),
IOPORT_DIR_OUTPUT | IOPORT_INIT_HIGH );
}
#endif
#ifdef USARTA1
if ((uintptr_t)usart == (uintptr_t)&UCSR1A) {
sck_pin = IOPORT_CREATE_PIN(PORTD, 5);
ioport_configure_port_pin(ioport_pin_to_port(sck_pin),
ioport_pin_to_mask(sck_pin),
IOPORT_DIR_OUTPUT | IOPORT_INIT_HIGH );
}
#endif
if (opt->spimode == 1 || opt->spimode == 3) {
usart->UCSRnC |= USART_UCPHA_bm;
} else {
usart->UCSRnC &= ~USART_UCPHA_bm;
}
if (opt->spimode == 2 || opt->spimode == 3) {
usart->UCSRnC |= USART_UCPOL_bm;
} else {
usart->UCSRnC &= ~USART_UCPOL_bm;
}
if (opt->data_order) {
usart->UCSRnC |= USART_DORD_bm;
} else {
usart->UCSRnC &= ~USART_DORD_bm;
}
usart_spi_set_baudrate(usart, opt->baudrate,
sysclk_get_source_clock_hz());
usart_tx_enable(usart);
usart_rx_enable(usart);
}
