MS51BSP_SDCC

Nuvoton MS51 series BSP for Small Device C Compiler (SDCC).
Now support MS51FB9AE_MS51XB9AE_MS51XB9BE (MS51_16K). Hello World tested.

Usage

1. Download and install SDCC. Check "Add to system path" in the end of installation.
   http://sdcc.sourceforge.net/
2. Download and install Nuvoton Nu-Link command tool. Add to system path manually.
   https://www.nuvoton.com/tool-and-software/software-development-tool/programmer
3. Restart your computer.
4. Refer to "SampleCode/Template/Project_temp/SDCC/". Simply clone and double click "buildall.bat".

Nuvoton MS51FB9AE

• It's a 25-cent 1T machine cycle enhanced 8051 microcontroller.
• Internal 24MHz high-speed oscillator.
• Internal 10KHz low-speed oscillator provide low power operating.
• 16KB program flash with 128-Byte security protection area.
• 256-Byte IRAM and additional 1KB XRAM.
• 12-bit ADC, 16-bit PWM, two UART and one I2C.
• Pin interrupt on most I/O pins.
• Support ICP (In-circuit programming)
• Support ISP (In-system programming)
• Support IAP (In-application programming), provide EEPROM purpose.
• Pin to pin compatible with N76E003AT20 and STM8S003.

Change

1. SFR define.

/* Keil */
sfr P0 = 0x80;
sbit P07 = P0^7;

/* SDCC */
__sfr __at (0x80) P0;
__sbit __at (0x87) P07;

2. __code, __data, __xdata

Add or replace

1. Add asm macro to replace Keil's intrins.h
2. Add "buildall.bat".
3. Add "loadflash.bat".
4. Add "putchar.c" for printf().