ZedBoard UART 1 Rx

xuartps_low_echo_example is an example pointed to by my projects board support package for ps7_uart_1. This is running as a standalone application and putty is configured to 115200 baud, 8 data bits, 1 stop bit, and no parity or flow control. I also ran the self_test which configures UART 1 to loopback mode and it worked. xuartps_low_echo_example source follows.

#include "xparameters.h"
#include "xstatus.h"
#include "xil_types.h"
#include "xil_assert.h"
#include "xuartps_hw.h"

/************************** Constant Definitions ***************************/

/*
* The following constants map to the XPAR parameters created in the
* xparameters.h file. They are defined here such that a user can easily
* change all the needed parameters in one place.
*/
#define UART_BASEADDRttXPAR_XUARTPS_0_BASEADDR
#define UART_CLOCK_HZttXPAR_XUARTPS_0_CLOCK_HZ
/*
* The following constant controls the length of the buffers to be sent
* and received with the device. This constant must be 32 bytes or less so the
* entire buffer will fit into the TX and RX FIFOs of the device.
*/
#define TEST_BUFFER_SIZEt16

#define CHAR_ESCtt0x1bt/* 'ESC' character is used as terminator */

/**************************** Type Definitions *****************************/

/***************** Macros (Inline Functions) Definitions *******************/

/************************** Function Prototypes ****************************/

int UartPsEchoExample(u32 UartBaseAddress);

/************************** Variable Definitions ***************************/

/*
* The following buffers are used in this example to send and receive data
* with the UART.
*/
u8 SendBuffer[TEST_BUFFER_SIZE];t/* Buffer for Transmitting Data */


/***************************************************************************/
/**
*
* Main function to call the Uart Echo example.
*
* @paramtNone
*
* @returntXST_SUCCESS if successful, XST_FAILURE if unsuccessful
*
* @notettNone
*
****************************************************************************/
int main(void)
{
tint Status;

t/*
t * Run the Uart Echo example , specify the Base Address that is
t * generated in xparameters.h
t */
tStatus = UartPsEchoExample(UART_BASEADDR);
tif (Status != XST_SUCCESS) {
ttreturn XST_FAILURE;
t}

treturn XST_SUCCESS;
}


/**************************************************************************/
/**
*
* This function does a minimal test on the UART device using the hardware
* interface.
*
* @paramtUartBaseAddress is the base address of the device
*
* @returntXST_SUCCESS if successful, XST_FAILURE if unsuccessful
*
* @notettNone.
*
**************************************************************************/
int UartPsEchoExample(u32 UartBaseAddress)
{
tint Index;
tu32 Running;
tu8 RecvChar;
tu32 CntrlRegister;

tCntrlRegister = XUartPs_ReadReg(UartBaseAddress, XUARTPS_CR_OFFSET);

t/*
t * Enable TX and RX for the device
t */
tXUartPs_WriteReg(UartBaseAddress, XUARTPS_CR_OFFSET,
ttt  ((CntrlRegister & ~XUARTPS_CR_EN_DIS_MASK) |
ttt   XUARTPS_CR_TX_EN | XUARTPS_CR_RX_EN));
t/*
t * Initialize the send buffer bytes with a pattern to send and the
t * the receive buffer bytes to zero
t */
tfor (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
ttSendBuffer[Index] = Index + '0';
t}

t/*
t * Send the entire transmit buffer.
t */
tfor (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
tt/*
tt * Wait until there is space in TX FIFO
tt */
tt while (XUartPs_IsTransmitFull(UartBaseAddress));

tt/*
tt * Write the byte into the TX FIFO
tt */
ttXUartPs_WriteReg(UartBaseAddress, XUARTPS_FIFO_OFFSET,
tttt  SendBuffer[Index]);
t}

tRunning = TRUE;
twhile (Running) {
tt /*
tt  * Wait until there is data
tt  */
ttwhile (!XUartPs_IsReceiveData(UartBaseAddress));

ttRecvChar = XUartPs_ReadReg(UartBaseAddress,
ttttt    XUARTPS_FIFO_OFFSET);

tt/* Change the capitalization */
ttif (('a' <= RecvChar) && ('z' >= RecvChar)) {
ttt/* Convert the Capital letter to a small. */
tttRecvChar = RecvChar - 'a' + 'A';
tt}
ttelse if (('A' <= RecvChar) && ('Z' >= RecvChar)) {
ttt/* Convert the small letter to a Capital. */
tttRecvChar = RecvChar - 'A' + 'a';
tt}
ttelse if (CHAR_ESC == RecvChar) {
tttRunning = FALSE;
tt}

tt/* Echo the character back */
ttXUartPs_WriteReg(UartBaseAddress,  XUARTPS_FIFO_OFFSET,
tttt  RecvChar);
t}

treturn XST_SUCCESS;
}

xuartps_low_echo_example is an example pointed to by my projects board support package for ps7_uart_1. This is running as a standalone application and putty is configured to 115200 baud, 8 data bits, 1 stop bit, and no parity or flow control. I also ran the self_test which configures UART 1 to loopback mode and it worked. xuartps_low_echo_example source follows.

#include "xparameters.h"
#include "xstatus.h"
#include "xil_types.h"
#include "xil_assert.h"
#include "xuartps_hw.h"

/************************** Constant Definitions ***************************/

/*
* The following constants map to the XPAR parameters created in the
* xparameters.h file. They are defined here such that a user can easily
* change all the needed parameters in one place.
*/
#define UART_BASEADDRttXPAR_XUARTPS_0_BASEADDR
#define UART_CLOCK_HZttXPAR_XUARTPS_0_CLOCK_HZ
/*
* The following constant controls the length of the buffers to be sent
* and received with the device. This constant must be 32 bytes or less so the
* entire buffer will fit into the TX and RX FIFOs of the device.
*/
#define TEST_BUFFER_SIZEt16

#define CHAR_ESCtt0x1bt/* 'ESC' character is used as terminator */

/**************************** Type Definitions *****************************/

/***************** Macros (Inline Functions) Definitions *******************/

/************************** Function Prototypes ****************************/

int UartPsEchoExample(u32 UartBaseAddress);

/************************** Variable Definitions ***************************/

/*
* The following buffers are used in this example to send and receive data
* with the UART.
*/
u8 SendBuffer[TEST_BUFFER_SIZE];t/* Buffer for Transmitting Data */


/***************************************************************************/
/**
*
* Main function to call the Uart Echo example.
*
* @paramtNone
*
* @returntXST_SUCCESS if successful, XST_FAILURE if unsuccessful
*
* @notettNone
*
****************************************************************************/
int main(void)
{
tint Status;

t/*
t * Run the Uart Echo example , specify the Base Address that is
t * generated in xparameters.h
t */
tStatus = UartPsEchoExample(UART_BASEADDR);
tif (Status != XST_SUCCESS) {
ttreturn XST_FAILURE;
t}

treturn XST_SUCCESS;
}


/**************************************************************************/
/**
*
* This function does a minimal test on the UART device using the hardware
* interface.
*
* @paramtUartBaseAddress is the base address of the device
*
* @returntXST_SUCCESS if successful, XST_FAILURE if unsuccessful
*
* @notettNone.
*
**************************************************************************/
int UartPsEchoExample(u32 UartBaseAddress)
{
tint Index;
tu32 Running;
tu8 RecvChar;
tu32 CntrlRegister;

tCntrlRegister = XUartPs_ReadReg(UartBaseAddress, XUARTPS_CR_OFFSET);

t/*
t * Enable TX and RX for the device
t */
tXUartPs_WriteReg(UartBaseAddress, XUARTPS_CR_OFFSET,
ttt  ((CntrlRegister & ~XUARTPS_CR_EN_DIS_MASK) |
ttt   XUARTPS_CR_TX_EN | XUARTPS_CR_RX_EN));
t/*
t * Initialize the send buffer bytes with a pattern to send and the
t * the receive buffer bytes to zero
t */
tfor (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
ttSendBuffer[Index] = Index + '0';
t}

t/*
t * Send the entire transmit buffer.
t */
tfor (Index = 0; Index < TEST_BUFFER_SIZE; Index++) {
tt/*
tt * Wait until there is space in TX FIFO
tt */
tt while (XUartPs_IsTransmitFull(UartBaseAddress));

tt/*
tt * Write the byte into the TX FIFO
tt */
ttXUartPs_WriteReg(UartBaseAddress, XUARTPS_FIFO_OFFSET,
tttt  SendBuffer[Index]);
t}

tRunning = TRUE;
twhile (Running) {
tt /*
tt  * Wait until there is data
tt  */
ttwhile (!XUartPs_IsReceiveData(UartBaseAddress));

ttRecvChar = XUartPs_ReadReg(UartBaseAddress,
ttttt    XUARTPS_FIFO_OFFSET);

tt/* Change the capitalization */
ttif (('a' <= RecvChar) && ('z' >= RecvChar)) {
ttt/* Convert the Capital letter to a small. */
tttRecvChar = RecvChar - 'a' + 'A';
tt}
ttelse if (('A' <= RecvChar) && ('Z' >= RecvChar)) {
ttt/* Convert the small letter to a Capital. */
tttRecvChar = RecvChar - 'A' + 'a';
tt}
ttelse if (CHAR_ESC == RecvChar) {
tttRunning = FALSE;
tt}

tt/* Echo the character back */
ttXUartPs_WriteReg(UartBaseAddress,  XUARTPS_FIFO_OFFSET,
tttt  RecvChar);
t}

treturn XST_SUCCESS;
}