n76E003使用SDCC

只看该作者 · 2020-10-21 20:20

https://github.com/wkaster/N76E003/tree/master/N76_sdcc

只看该作者 · 2020-10-21 20:22

只看该作者 · 2020-10-21 20:22

Example:

Keil C51 code:
--------------

mov TA, #0xAA ; TA = 0xAA
mov TA, #0x55 ; TA = 0x55 {'U'}
orl SFRS, #0x01       ; SFRS |= 0x01
SDCC non corrected code:
--------------------------

mov TA, #0xAA    ; TA = 0xAA
mov TA, #0x55    ; TA = 0x55 {'U'}
mov R6, SFRS ; R6 = SFRS
orl 0x06, #0x01    ; 0x06 |= 0x01
mov SFRS, R6 ; SFRS = R6
Solution 1
Use a peep.def file containing:

replace {
  mov  %1,%2
  orl  a%1,%3
  mov  %2,%1
} by {
  orl  %2,%3
}

Solution 2 (Thanks to Vladimir Shevtsov / MrFeek)
Make a modified SFR_Macro.h replacing all "|=" statments

Example:

Replace this:  #define  set_SMOD PCON |= SET_BIT7; // Original
By this:          #define  set_SMOD _asm_ ("orl _PCON,#0x80");  // SDCC compatible

Disable Power-On Reset (POR)
Nuvoton (strongly) recommends disable POR at startup. See section 24.1 of
the datasheet for more information. That could be done using the
"_sdcc_external_startup" function as shown below.

unsigned char _sdcc_external_startup (void)
{
__asm
mov 0xC7, #0xAA
mov 0xC7, #0x55
mov 0xFD, #0x5A
mov 0xC7, #0xAA
mov 0xC7, #0x55
mov 0xFD, #0xA5
__endasm;
return 0;
}

只看该作者 · 2020-11-10 13:45

SDCC是什么工具还是芯片？

只看该作者 · 2020-11-10 13:45

有C语言的例程吗

只看该作者 · 2020-11-10 13:45

我只能说我没看懂

只看该作者 · 2020-11-10 13:46

能实现什么功能呢

只看该作者 · 2020-11-10 13:46

先去网址学习一下再说