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int rn_write(int handle, int regno, char *data,
int datalen);
Writes a string to the specified device and register. Waits for results.
mation to determine that the peripheral card is connected to a master.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to establish the
handle.
regno is the command register number as designated by each device.
data is a pointer to the address of the string to write to the device.
datalen is the number of bytes to write (0–15).
NOTE: A data length of 0 will transmit the one-byte command register number.
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the peripheral
card is not connected to the master, and -2 means that the data length was greater than 15.
SEE ALSO
rn_read
int rn_read(int handle, int regno, char *recdata,
int datalen);
Reads a string from the specified device and register. Waits for results.
information to determine that the peripheral card is connected to a master.
PARAMETERS
handle is an address index to device information. Use rn_device() or rn_find() to establish the
handle.
regno is the command register number as designated by each device.
recdata is a pointer to the address of the string to read from the device.
datalen is the number of bytes to read (0–15).
NOTE: A data length of 0 will transmit the one-byte command register number.
RETURN VALUE
The status byte from the previous command. -1 means that device information indicates the peripheral
card is not connected to the master, and -2 means that the data length was greater than 15.
SEE ALSO
rn_write
90
check device infor-
This function will
check device
This function will
Wolf (BL2600)
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