With TX and RX shorted and using pull-up resistor I succesfully got ATR sequence, PPS bytes 2 times (I presume one of them is because of tx and rx being shorted) and byte sequence (one time) using TI TM4C123. So, not understanding why did this happen I thought I'll try ISO 7816 support and check what I get. Hooked up I/O to Rx (pull-up added) and tried to send or get something with no success at all. What could be a problem?
Code for init:
void UART1Init(void){
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB); /* Enable PORT B which is used UART1 */
SysCtlPeripheralEnable(SYSCTL_PERIPH_UART1); /* Enabling UART1 peripheral */
while(!SysCtlPeripheralReady(SYSCTL_PERIPH_UART1)){ /* If peripheral is not configured, wait a bit */
}
GPIOPinConfigure(GPIO_PB0_U1RX); /* Configure pins to make sure no other peripheral takes it after accidentally */
GPIOPinConfigure(GPIO_PB1_U1TX);
GPIOPinTypeUART(GPIO_PORTB_BASE, GPIO_PIN_0 | GPIO_PIN_1);
UARTClockSourceSet(UART1_BASE, UART_CLOCK_SYSTEM); /* Use System oscillator for UART1 */
UARTStdioConfig(1, 9600, 50000000); /* Configure UART1 baudrate using Main Clok */
UARTParityModeSet(UART1_BASE, UART_CONFIG_PAR_EVEN);
UARTSmartCardEnable(UART1_BASE); /* Turning on Smart Card mode */
}
