6 – urom_movedp1dec, 7 – urom_movebp, 8 – urom_movebpinc – Maxim Integrated DS4830A Optical Microcontroller User Manual
Page 235: Ds4830a user’s guide
DS4830A User’s Guide
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25.3.6 – UROM_moveDP1dec
Function
UROM_moveDP1dec
Summary
Reads the byte/word value pointed to by DP[1], then decrements DP[1].
Inputs
DP[1]: Address to read from data space (include 8000h offset if reading from flash).
Outputs
GR: Data byte/word read. DP[1] is decremented.
Destroys
None
Notes:
• Before calling this function, DPC should be set appropriately to configure DP[1] for byte or word mode.
• The address passed to this function should be based on the data memory mapping for the utility ROM, as
shown in Figure 25-1. When a byte mode address is used, CDA0 must be set appropriately to access
either the upper or lower half of program flash memory.
• This function automatically selects DP[1] as the data pointer before reading the byte/word value.
•
Implemented as: move GR, @DP[1]--
25.3.7 – UROM_moveBP
Function
UROM_moveBP
Summary
Reads the byte/word value pointed to by BP[OFFS].
Inputs
BP[OFFS]: Address to read from data space (include 8000h offset if reading from flash).
Outputs
GR: Data byte/word read.
Destroys
None.
Notes:
• Before calling this function, DPC should be set appropriately to configure BP[OFFS] for byte or word mode.
• The address passed to this function should be based on the data memory mapping for the utility ROM, as
shown in Figure 25-1. When a byte mode address is used, CDA0 must be set appropriately to access
either the upper or lower half of program flash memory.
• This function automatically selects BP[OFFS] as the data pointer before reading the byte/word value.
• Implemented as: move GR, @
BP[OFFS]
25.3.8 – UROM_moveBPinc
Function
UROM_moveBPinc
Summary
Reads the byte/word value pointed to by BP[OFFS], then increments OFFS.
Inputs
BP[OFFS]: Address to read from data space (include 8000h offset if reading from flash).
Outputs
GR: Data byte/word read. OFFS is incremented.
Destroys
None
Notes:
• Before calling this function, DPC should be set appropriately to configure BP[OFFS] for byte or word mode.
• The address passed to this function should be based on the data memory mapping for the utility ROM, as
shown in Figure 25-1. When a byte mode address is used, CDA0 must be set appropriately to access
either the upper or lower half of program flash memory.
• This function automatically selects BP[OFFS] as the data pointer before reading the byte/word value.
• Implemented as: move GR, @
BP[OFFS++]