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/*****************************************************************************/
/**
* @file xmbox_tapp_example.c
*
* This file contains a design example for using the Mailbox hardware and
* driver XMbox
*
* This example attempts to send a known message through the mailbox from
* the processor identified as 0 (XPAR_CPU_ID=0) to the other processor.
* The message is received by the receiver and the test passes.
* Since the application is running on two seperate processors, the
* initiator declares success when the message is sent and the receiver
* declares success when the message is received. There is no feedback
* to the initiator so a terminal is required for each processor to verify
* that the test passed for both sides.
*
* The example assumes there are two processors availabile in the system that
* are expected to inter-communicate. If Mailbox is connected to only one
* Processor then Data has to be sent from one port and should be received
* from another port.
*
* This example has been tested on ML505 Hardware Evaluation board.
*
* @note
*
* These code fragments will illustrate how the XMbox component can be used to:
* - Initialize the Mailbox core
* - pass data between two processors.
*
*
*<pre>
* MODIFICATION HISTORY:
*
* Ver Who Date Changes
* ----- ---- -------- -----------------------------------------------
* 1.00a va First release
* 1.00a ecm 06/09/07 Cleanup, new coding standard, check into XCS
* 1.01a ecm 08/28/08 converted to testapp example
* 1.01a ecm 10/28/08 corrected output to match the requirements for TestApp
* integration.
* 2.00a hm 04/09/09 Added receiving data from the other processor.
* 3.01a sdm 05/06/10 Cleanup for coding guidelines and removed printfs
*</pre>
*****************************************************************************/
/**************************** Include Files **********************************/
#include "xmbox.h"
#include "xstatus.h"
#include "xparameters.h"
/************************** Constant Definitions *****************************/
/*
* If the XPAR_CPU_ID != 0 for this instance, the only other option is 1
* to make the example work. It is possible that there are more than
* 2 processors in the system but there must always be a 0
*/
#if XPAR_CPU_ID != 0
#define MY_CPU_ID 1
#else
#define MY_CPU_ID XPAR_CPU_ID
#endif /* XPAR_CPU_ID != 0 */
#define MSGSIZ 1024 /* Size of the buffer for received message */
#define HELLO_SIZE 40
#define TIMEOUT_MAX_COUNT 0xF0000000 /* Max count to wait for the message */
/*
* 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 MBOX_DEVICE_ID XPAR_MBOX_0_DEVICE_ID
/**************************** Type Definitions *******************************/
#define printf xil_printf /* A smaller footprint printf */
/***************** Macros (Inline Functions) Definitions *********************/
/************************** Variable Definitions *****************************/
static XMbox Mbox; /* Instance of the Mailbox driver */
/* Buffer for storing received the message */
char RecvMsg[MSGSIZ] __attribute__ ((aligned(4)));
u32 Temp1pad = 0; /* alignment */
/* Sent Message */
char *ProducerHello = "Hello! The Producer greets the Consumer...";
/************************** Function Prototypes ******************************/
int MailboxExample(u16 MboxDeviceId);
static int MailboxExample_Send(XMbox *MboxInstancePtr, int CPU_Id);
static int MailboxExample_Receive(XMbox *MboxInstancePtr, int CPU_Id);
/*****************************************************************************/
/**
* This function is the main function for the mailbox example.
*
* @param None.
*
* @return XST_SUCCESS if successful, XST_FAILURE if unsuccessful.
*
* @note None.
*
*****************************************************************************/
#ifndef TESTAPP_GEN
int main(void)
{
printf ("MailboxExample :\tStarts for CPU %d.\r\n", MY_CPU_ID);
if (MailboxExample(MBOX_DEVICE_ID) != XST_SUCCESS) {
printf("MailboxExample :\tFailed.\r\n");
printf("MailboxExample :\tEnds.\r\n");
return XST_FAILURE;
}
printf("MailboxExample :\tSucceeded.\r\n");
printf("MailboxExample :\tEnds for CPU %d.\r\n", MY_CPU_ID);
return XST_SUCCESS;
}
#endif
/*****************************************************************************/
/**
*
* This function sends a message to and receives a message from the other
* processor.
*
* @param MboxDeviceID is the device Id of the MailBox.
*
* @return - XST_SUCCESS if the test passes.
* - XST_FAILURE if the test fails.
*
* @note None.
*
******************************************************************************/
int MailboxExample(u16 MboxDeviceId)
{
XMbox_Config *ConfigPtr;
int Status;
/*
* Lookup configuration data in the device configuration table.
* Use this configuration info down below when initializing this
* component.
*/
ConfigPtr = XMbox_LookupConfig(MboxDeviceId );
if (ConfigPtr == (XMbox_Config *)NULL) {
return XST_FAILURE;
}
/*
* Perform the rest of the initialization.
*/
Status = XMbox_CfgInitialize(&Mbox, ConfigPtr, ConfigPtr->BaseAddress);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/* Send the hello */
Status = MailboxExample_Send(&Mbox, MY_CPU_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
/* Receive the hello and verify the message */
Status = MailboxExample_Receive(&Mbox, MY_CPU_ID);
if (Status != XST_SUCCESS) {
return XST_FAILURE;
}
return XST_SUCCESS;
}
/*****************************************************************************/
/**
*
* This function sends the hello message to the other processor.
*
* @param MboxInstancePtr is the instance pointer for the XMbox.
* @param CPU_Id is the CPU ID for the program that is running on.
*
* @return - XST_SUCCESS if the send succeeds.
* - XST_FAILURE if the send fails.
*
* @note None.
*
******************************************************************************/
static int MailboxExample_Send(XMbox *MboxInstancePtr, int CPU_Id)
{
int Status;
u32 Nbytes;
u32 BytesSent;
Nbytes = 0;
while (Nbytes != HELLO_SIZE) {
/* Write a message to the mbox */
Status = XMbox_Write(MboxInstancePtr,
(u32 *)((u8 *)ProducerHello + Nbytes),
HELLO_SIZE - Nbytes,
&BytesSent);
if (Status == XST_SUCCESS)
Nbytes += BytesSent;
}
return XST_SUCCESS;
}
/*****************************************************************************/
/**
*
* This function receives a message from the other processor and verifies that
* it's the expected message.
*
* @param MboxInstancePtr is the instance pointer for the XMbox.
* @param CPU_Id is the CPU ID for the program that is running on.
*
* @return - XST_SUCCESS if the receive succeeds.
* - XST_FAILURE if the receive fails.
*
* @note None.
*
******************************************************************************/
static int MailboxExample_Receive(XMbox *MboxInstancePtr, int CPU_Id)
{
int Status;
u32 Nbytes;
u32 BytesRcvd;
int Timeout;
Nbytes = 0;
Timeout = 0;
while (Nbytes < HELLO_SIZE) {
/* Read a message from the mbox */
Status = XMbox_Read(MboxInstancePtr,
(u32 *)(RecvMsg + Nbytes),
HELLO_SIZE - Nbytes, &BytesRcvd);
if (Status == XST_SUCCESS)
Nbytes += BytesRcvd;
if (Timeout++ > TIMEOUT_MAX_COUNT)
return XST_FAILURE;
}
/* Compare the recieved the message is the same as we expect */
if (memcmp(RecvMsg, ProducerHello, HELLO_SIZE)) {
return XST_FAILURE;
} else {
return XST_SUCCESS;
}
}