UNIOUT pin, device, command
UNIOUT pin, device, command, (data)
UNIOUT pin, device, command, address, address, (data, data...)
Pin - is a variable/constant which specifies the i/o pin to use.
Device - is the UNI/O type, %10100000 for EEPROM devices
Command - is the write type command, either
UNI_WRITE write UNI_WREN write enable UNI_WRDI write disable UNI_WRSR write status UNI_ERAL erase all UNI_SETAL set all
Address - is the 2 byte address required by UNI_WRITE.
Data - is the information to write.
Write data to the UNI/O device.
Note that the UNI/O parts have a 16 byte page boundary. A single write cannot go over a page boundary (ie a multiple of 16). This means, for instance, you may write 10 bytes in one UNI_WRITE command from address 0 up, but not 10 bytes from address 10 upwards, as this would overlap a page boundary (byte 16).
The 'uniout' command allows data to be written to an external UNI/O part such as the 11LCxxx series EEPROM chips. UNI/O parts only require one i/o pin to connect to the PICAXE microcontroller. A 4k7 pullup resistor is not technically required by the UNI/O specification, but is highly recommended.
Note that when first powered up (after a power-on or brown out reset) the UNI/O device is in a special low-power standby mode. It is necessary to 'wake' the device, via a rising edge pulse (using the pulsout command), before the uniin / uniout commands will function correctly.
This command cannot be used on the following pins due to silicon restrictions:
20X2 C.6 = fixed input
- Code Example:
reset_uni: pulsout C.3, 1 ; ESSENTIAL - enable device via a rising edge pulse main: inc b1 uniout C.3, %10100000, UNI_WRSR, (0) ; clear status uniout C.3, %10100000, UNI_WREN ; write enable uniout C.3, %10100000, UNI_WRITE, 0, 1, (b1) ; write pause 10 ; wait for write uniout C.3, %10100000, UNI_WRDI ; write disable pause 1000 ; wait uniin C.3, %10100000, UNI_READ, 0, 1, (b2) ; read debug ; display goto main ; loopCopy Code Submit an Example
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