A Limitation Item About The C Language - Renesas M16C FAMILY User Manual

5.2.2 A limitation item about the C language

When using Renesas C compiler. It is necessary to change a start up file (ncrt0.a30 and
sect30.inc).
(1) The change point of "ncrt0.a30"
(a) Initialize standard I/O
The UARTi setting is modified in the I/O initialization treatment. Therefore, to
ensure that the I/O initialization treatment is not called up, comment it out.
--> Applicable MCUs
All MCUs
(b) Reset treatment (after reset, this program will start)
The interrupt enable flag is cleared and communication is disabled after the
LDINTB instruction. Therefore, execute the interrupt enable setting immediately
after the LDINTB instruction.
--> Applicable MCUs
M16C/10, M16C/1N, M16C/62A(M), M16C/6N(M306NAFG, M306NABFC only)
M16C/24, M3062GF8N, M16C/80
(c) Variable Vector process (INTERRUPT VECTOR ADDRESS definition)
The initial setting of the relocatable vector table (variable vector table) will cause
the program to overlap with the monitor memory area. Set the address so that it
does not overlap with the memory area.
--> Applicable MCUs
All MCUs except R8C/Tiny
(2) The change point of "sect30.inc"
(a) UARTi receive interrupt vector address setting
The user must set the UARTi receive interrupt address for communication between
the monitor program and the debugger. Set the interrupts as indicated below
applicable MCUs.
--> Applicable MCUs
UART1 receive interrupt (FF900h): M16C/24, M16C/62A(M), M3062GF8N
UART0 receive interrupt (FF900h): M16C/10, M16C/1N
UART1 receive interrupt (FFF900h): M16C/80
M16C/6N(M306NAFG, M306NBFC only)
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