Library Description

The library covers necessary functions for the usage of the ETH Click board.
It allows user to enable, disable and reset the device, also, user can check the interrupt state.

Key functions:

• uint8_t eth_checkInrerrupt() - Function checks the state of the interrupt pin.
• void eth_reset() - Function is used to reset the device.
• void eth_enable() - Function is used to enable the device.

Examples description

The application is composed of three sections :

• System Initialization - Initializes SPI module, LOG and GPIO structures, sets CS and RST pins as output and INT pin as input.
• Application Initialization - Initalizes SPI driver.
• Application Task - This is an example that shows the capabilities of the ETH click by establishing mini web server that shows greating message.

void applicationTask()
{
    SPI_Ethernet_doPacket();
}

Additional Functions :

• uint16_t SPI_Ethernet_UserTCP( char *remoteHost, uint16_t remotePort, uint16_t localPort, uint16_t reqLength, uint8_t *flags ) - This is TCP module
   routine. It is internally called by the library. The user accesses to the TCP/HTTP request by using some of the SPI_Ethernet_get routines.
   The user puts data in the transmit buffer by using some of the SPI_Ethernet_put routines. The function must return the length in bytes of the TCP/HTTP
   reply, or 0 if there is nothing to transmit. If there is no need to reply to the TCP/HTTP requests, just define this function with return(0)
   as a single statement.
• uint16_t SPI_Ethernet_UserUDP( char *remoteHost, uint16_t remotePort, uint16_t destPort, uint16_t reqLength, uint8_t *flags ) - This is UDP module
   routine. It is internally called by the library. The user accesses to the UDP request by using some of the SPI_Ethernet_get routines. The user puts data
   in the transmit buffer by using some of the SPI_Ethernet_put routines. The function must return the length in bytes of the UDP reply, or 0 if nothing
   to transmit. If you don't need to reply to the UDP requests, just define this function with a return(0) as single statement.

Other mikroE Libraries used in the example:

• SPI
• SPI_Ethernet
• Conversions

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.