rtems_status_code can_open( const lpc176x_can_number minor, can_freq freq )
{
const can_driver_entry *const can_driver = &can_driver_table[ minor ];
rtems_status_code sc = RTEMS_INVALID_NUMBER;
if ( CAN_DRIVER_IS_MINOR_VALID( minor ) ) {
/*Enable CAN and acceptance filter modules.*/
sc =
lpc176x_module_enable( can_driver->module, LPC176X_MODULE_PCLK_DEFAULT );
RTEMS_CHECK_SC( sc, "enable can module" );
sc = lpc176x_module_enable( LPC176X_MODULE_ACCF,
LPC176X_MODULE_PCLK_DEFAULT );
RTEMS_CHECK_SC( sc, "enable acceptance filter" );
/*Set pin functions.*/
setpins( minor );
can_reset( can_driver );
can_driver->device->IER = CAN_DEFAULT_INTERRUPT_CONFIGURATION;
sc = can_frequency( can_driver, freq );
RTEMS_CHECK_SC( sc, "Configure CAN frequency" );
can_initialize();
acceptance_filter_device->AFMR = CAN_ACCF_AFMR_ACCBP; /*Bypass Filter.*/
}
return sc;
}
static bool lpc176x_uart3_probe(rtems_termios_device_context *ctx)
{
(void)ctx;
lpc176x_module_enable( LPC176X_MODULE_UART_3, LPC176X_MODULE_PCLK_DEFAULT );
lpc176x_pin_select( LPC176X_PIN_UART_3_TXD, LPC176X_PIN_FUNCTION_10 );
lpc176x_pin_select( LPC176X_PIN_UART_3_RXD, LPC176X_PIN_FUNCTION_10 );
return true;
}
/**
* @brief Initialize the rtc device.
*/
void bsp_rtc_initialize( void )
{
/* Enable module power */
lpc176x_module_enable( LPC176X_MODULE_RTC, LPC176X_MODULE_PCLK_DEFAULT );
/* Enable the RTC and use external clock */
RTC_CCR = RTC_CCR_CLKEN | RTC_CCR_CLKSRC;
/* Disable interrupts */
RTC_CIIR = 0U;
RTC_CISS = 0U;
RTC_AMR = 0xFFU;
/* Clear interrupts */
RTC_ILR = RTC_ILR_RTCCIF | RTC_ILR_RTCALF | RTC_ILR_RTSSF;
}
/**
* @brief Enables the watchdog module, sets wd clock and wd timer.
*
* @param tcount Timer's out value.
* @return RTEMS_SUCCESSFUL if the configuration was done successfully.
*/
static inline rtems_status_code enable_module_and_set_clocksel(
const lpc176x_microseconds tcount )
{
rtems_status_code status_code;
/* Sets clock. */
LPC176X_WDCLKSEL = LPC176X_WWDT_CLKSEL_WDSEL_PCLK;
/* Enables the watchdog module. */
status_code = lpc176x_module_enable( LPC176X_MODULE_WD,
LPC176X_MODULE_PCLK_DEFAULT );
RTEMS_CHECK_SC( status_code, "Enabling the watchdog module." );
/* Set the watchdog timer constant value. */
LPC176X_WDTC = ( LPC176X_CCLK / LPC176X_WD_PRESCALER_DIVISOR ) * tcount;
return status_code;
}
