Scope
This is a driver and network middleware for the MSP432E401Y microcontroller with built-in Ethernet MAC.
Prerequisites
Ensure that driverlib for the MSP432E4 is installed and added to the include path for the project.
Recommendation
When a MAC address changes or when there is a change in the network setup, it is recommended to perform a hard reset of the microcontroller in lieu of resetting only the MAC hardware.
List of Tasks
The tasks listed in the table below are implemented internally by the driver (NetworkInterface.c).
| Task Name | Purpose |
|---|---|
| prvEMACDeferredInterruptHandlerTaskRX | RX Task |
| prvEMACDeferredInterfaceOutputTaskTX | TX Task |
| prvCheckLinkUpOrDownNetStateTask | Network State Checking Task (link up/down, network state & reset) |
The tasks listed in the table below are implemented by additional code provided as an example related to how the driver might be used in an application (NetworkMiddleware.c). The additional code does not have to be used and is only provided to be useful.
| Task Name | Purpose |
|---|---|
| prvNetworkResetTask | Task to periodically reset the network (if required) |
Example Code
#include "NetworkInterface.h"
#include "NetworkMiddleware.h"
void setup_wired_ethernet()
{
struct InternalNetworkInterfaceMSP432EConfig config;
vGetInternalNetworkInterfaceMSP432EConfigDefaults(&config);
config.setMACAddrInternal = false; /* true if the MAC address is to be read from microcontroller flash */
config.MACAddr[0] = 0x70; /* replace with a custom MAC address */
config.MACAddr[1] = 0xFF;
config.MACAddr[2] = 0x76;
config.MACAddr[3] = 0x1C;
config.MACAddr[4] = 0xC1;
config.MACAddr[5] = 0xD0;
vPublicSetupEMACNetwork(config);
/* setup the network stack middleware */
const char *devname = "device";
struct InternalNetworkMiddlewareData setupData;
strncpy(setupData.deviceName, devname, strlen(devname));
setupData.resetNetworkTaskEveryXSeconds = 86400; /* Restart the network every 24 hours (86400 seconds) only when setupData.resetNetworkTaskRunning == true */
setupData.resetNetworkTaskRunning = false; /* Run the network task to reset the network every so often (i.e. to periodically obtain a new IP address) */
/* set the static IP address */
vConvertOctetsToAddr(setupData.ucIPAddress, 192, 168, 1, 9);
vConvertOctetsToAddr(setupData.ucNetMask, 255, 255, 255, 0);
vConvertOctetsToAddr(setupData.ucGatewayAddress, 192, 168, 1, 1);
vConvertOctetsToAddr(setupData.ucDNSServerAddress, 192, 168, 1, 1);
vPublicSetupFreeRTOSTasks(setupData);
/*
Start the RTOS scheduler by calling vTaskStartScheduler()
Use publicPreventNetworkReset() to block the network reset during a critical section of the code
Set the device name using vPublicSetupDeviceName()
*/
}
Contact
Nicholas J. Kinar (n.kinar@usask.ca) or FreeRTOS Forums