Zilog EZ80F91AZA Instrukcja Użytkownika Pobierz pdf (Strona 19)

UM007518-1211 EMAC Configuration

Zilog Real-Time Kernel: eZ80

CPU

User Manual

Example

To configure UART for a 57600 bps baud rate, 8 data bits, 1 stop bit and no parity, and to

specify the use of the

SERSET_ONLCR and SERSET_IGNHUP flags, the following code line

must be entered in the

serparams array:

{57600, 8, 1, PARNONE, SERSET_ONLCR | SERSET_IGNHUP}

EMAC Configuration

The configurable parameters for the EMAC driver are located in the emac_conf.c

source file that accompanies the RZK release in the following path:

<ZDSII installed directory>\Program Files\Zilog\

ZDSII_eZ80Acclaim!_A.B.C\ZTP\ZTPX.Y.Z_Lib\RZK\Conf

To change any of the EMAC parameters, include this file in the project and set the appro-

priate values, as defined in Table 4.

serparams settings (cont’d) SERSET_SYNC This Flag directs UART driver to use a

synchronous I/O routine to transfer data

over the serial port. Synchronous I/O

operations require UART driver to poll

for the underlying UART hardware

instead of using interrupts. This polling

instance is not efficient and usually

results in many lost characters. Zilog

does not recommend the use of this

Flag setting.

SERSET_IGNHUP If the serial driver detects the loss of a

valid Carrier Detect signal, the driver

assumes that the physical link is dis-

connected by the remote end of the

serial connection. As a result, UART

driver automatically closes the underly-

ing serial device and terminates all of

the PPP or serial communications. If

this Flag is included in the serparams

structure, then UART driver ignores the

loss of the valid Carrier Detect signal.

Table 3. Configurable UART Drivers (Continued)

Variable/Macro Default Value Description/Valid Values

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 39 40

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Zilog EZ80F91AZA Instrukcja Użytkownika Strona 19