/**
* \brief Initializes a ISO7816 interface device.
*
* \param p_usart_opt Pointer to an ISO7816 instance.
* \param ul_mck USART module input clock frequency.
* \param ul_rst_pin_idx Control smart card RST pin index.
*/
unsigned int iso7816_init(const usart_iso7816_opt_t *p_usart_opt,
uint32_t ul_mck, uint32_t ul_rst_pin_idx)
{
/* Pin RST of ISO7816 initialize. */
gs_ul_rst_pin_idx = ul_rst_pin_idx;
#if defined(SMART_CARD_USING_GPIO)
gpio_set_pin_low(gs_ul_rst_pin_idx);
#elif defined(SMART_CARD_USING_IOPORT)
ioport_set_pin_level(gs_ul_rst_pin_idx, IOPORT_PIN_LEVEL_LOW);
#endif
/* Init the global variable for ISO7816. */
g_ul_clk = ul_mck;
if(usart_init_iso7816(ISO7816_USART, p_usart_opt, g_ul_clk)){
return 1;
}
/* Disable interrupts. */
usart_disable_interrupt(ISO7816_USART, 0xffffffff);
/* Write the Timeguard Register. */
usart_set_tx_timeguard(ISO7816_USART, 5);
/* Enable TX and RX. */
usart_enable_rx(ISO7816_USART);
//usart_enable_tx(ISO7816_USART);
return 0;
}
/**
* \brief USART RS485 mode configuration.
*
* Configure USART in RS485 mode, asynchronous, 8 bits, 1 stop bit,
* no parity, 256000 bauds and enable its transmitter and receiver.
*/
void configure_usart(void)
{
const sam_usart_opt_t usart_console_settings = {
BOARD_USART_BAUDRATE,
US_MR_CHRL_8_BIT,
US_MR_PAR_NO,
US_MR_NBSTOP_1_BIT,
US_MR_CHMODE_NORMAL,
/* This field is only used in IrDA mode. */
0
};
/* Enable the peripheral clock in the PMC. */
sysclk_enable_peripheral_clock(BOARD_ID_USART);
/* Configure USART in RS485 mode. */
//jsi 7feb16 we want rs232 not rs485 for our application usart_init_rs485(BOARD_USART, &usart_console_settings,
//jsi 7feb16 we want rs232 not rs485 for our application sysclk_get_cpu_hz());
usart_init_rs232(BOARD_USART, &usart_console_settings, sysclk_get_cpu_hz());
/* enable transmitter timeguard, 4 bit period delay. */
usart_set_tx_timeguard(BOARD_USART, 4);
/* Disable all the interrupts. */
usart_disable_interrupt(BOARD_USART, ALL_INTERRUPT_MASK);
/* Enable TX & RX function. */
usart_enable_tx(BOARD_USART);
usart_enable_rx(BOARD_USART);
/* Configure and enable interrupt of USART. */
NVIC_EnableIRQ(USART_IRQn);
}
