众里寻她兜错路，蓦然回首，她却在那库函数！
一直以来我未曾在网上找到一个专门解析eeprom块编程的库函数，要么遇到的就说库函数太烂了，自己写挺好，要么就是王志杰的例程，这对于初学者来说无非是件很悲催的事情，今天我就了了这个心愿，给后来者栽棵树，希望能茁壮成长！
我个人觉得stm8s的库函数很强大，用起来很方便，看着她的源代码也是那么的有条理，堪称规范，对于初学者来说她的库函数代码很值得学习，学习她的思路，她的布局会使你获益匪浅！
步入正题，先上代码！（我用的是STVD4.3.2 外挂Cosmic4.3.4**版）如有需要我会上传分享给大家，这里不讨论开发环境孰好孰坏，用好了奥拓便是奥迪,就这么简单！
/* MAIN.C file
*
* Copyright (c) 2002-2005 STMicroelectronics
*/
#include "stm8s.h"
#include <stdio.h>
int _fctcpy(char name);
main()
{
u8 block_buff[128] ={0};
u8 i = 0;
u8 c = 0;
_fctcpy('F');
CLK_DeInit();
CLK_HSICmd(ENABLE);
CLK_SYSCLKConfig(CLK_PRESCALER_HSIDIV1);
UART1_DeInit();
UART1_Init((u32)115200, UART1_WORDLENGTH_8D, UART1_STOPBITS_1, UART1_PARITY_NO,
UART1_SYNCMODE_CLOCK_DISABLE,UART1_MODE_TXRX_ENABLE);
UART1_ITConfig(UART1_IT_RXNE_OR, ENABLE);
UART1_Cmd(ENABLE);
GPIO_DeInit(GPIOD);
GPIO_Init(GPIOD, GPIO_PIN_LNIB, GPIO_MODE_OUT_PP_LOW_FAST);
for(i=0;i<128;i++)
block_buff=i;
FLASH_DeInit();
FLASH_Unlock(FLASH_MEMTYPE_DATA);
FLASH_SetProgrammingTime(FLASH_PROGRAMTIME_TPROG);
FLASH_ProgramBlock(0x0001, FLASH_MEMTYPE_DATA, FLASH_PROGRAMMODE_STANDARD, block_buff);
FLASH_EraseBlock(0x0001, FLASH_MEMTYPE_DATA);
c = FLASH_ReadByte(0x40ff);//读出值到变量中
printf("c=%x\r\n",(u16)c);//打印
c = FLASH_ReadByte(0x407f);
printf("c=%x\r\n",(u16)c);
c = FLASH_ReadByte(0x4080);
printf("c=%x\r\n",(u16)c);
c = FLASH_ReadByte(0x4100);
printf("c=%x\r\n",(u16)c);
_asm("rim");
while (1)
{
GPIO_WriteHigh(GPIOD, GPIO_PIN_LNIB);
}
}
char putchar (char c) //串口打印重定向，只要有这个函数，然后包含stdio.h就可以直接调用打印函数了，若有不成功时请把参数前强转为（u16）
{
if (c == '\n')
{
/* put '\r' to hardware here */
/* Wait transmission is completed : otherwise the first data is not sent */
while (!(UART1->SR & 0x40));
UART1->DR = ('\r');
/* Wait transmission is completed */
while (!(UART1->SR & 0x40));
}
/* put c to hardware here */
/* Wait transmission is completed : otherwise the first data is not sent */
while (!(UART1->SR & 0x80));
UART1->DR = (c);
/* Wait transmission is completed */
while (!(UART1->SR & 0x80));
return (c);
}
这是我的实验例程，板子是stm8s207s6，函数的意思很明确，不再解释，下面开始解析配置步骤！
/**
@code
All the functions defined below must be executed from RAM exclusively, except
for the FLASH_WaitForLastOperation function which can be executed from Flash.
Steps of the execution from RAM differs from one toolchain to another:
- For Cosmic Compiler:
1- Define a segment FLASH_CODE by the mean of " #pragma section (FLASH_CODE)".
This segment is defined in the stm8s_flash.c file.
2- Uncomment the "#define RAM_EXECUTION (1)" line in the stm8s.h file,
or define it in Cosmic compiler preprocessor to enable the FLASH_CODE segment
definition.
3- In STVD Select Project\Settings\Linker\Category "input" and in the RAM section
add the FLASH_CODE segment with "-ic" options.
4- In main.c file call the _fctcpy() function with first segment character as
parameter "_fctcpy('F');" to load the declared moveable code segment
(FLASH_CODE) in RAM before execution.
5- By default the _fctcpy function is packaged in the Cosmic machine library,
so the function prototype "int _fctcopy(char name);" must be added in main.c
file.
解析（stvd+cosmic+4.0官方库函数）：
第一步：#pragma section (FLASH_CODE）库函数stm8s_flash.c中代码第520行已经有了，并且没被注释掉，原型为：
#if defined (_COSMIC_) && defined (RAM_EXECUTION)
#pragma section (FLASH_CODE)
#endif /* _COSMIC_ && RAM_EXECUTION */
IN_RAM(FLASH_Status_TypeDef FLASH_WaitForLastOperation(FLASH_MemType_TypeDef FLASH_MemType))
{
......//库函数代码
}
IN_RAM(void FLASH_EraseBlock(uint16_t BlockNum, FLASH_MemType_TypeDef FLASH_MemType))
{
......库函数代码
}
IN_RAM(void FLASH_ProgramBlock(uint16_t BlockNum, FLASH_MemType_TypeDef FLASH_MemType,
FLASH_ProgramMode_TypeDef FLASH_ProgMode, uint8_t *Buffer))
{
......//库函数代码
}
#if defined (_COSMIC_) && defined (RAM_EXECUTION)
/* End of FLASH_CODE section */
#pragma section ()
#endif /* _COSMIC_ && RAM_EXECUTION */
第二步：打开宏开关#define RAM_EXECUTION (1)，在stm8s.h中
#if !defined (RAM_EXECUTION)
#define RAM_EXECUTION (1)
#endif /* RAM_EXECUTION */
第三步：工程设置
第四步：在main.c中声明int _fctcpy(char name);在主函数运行前调用_fctcpy('F');具体操作可参考主函数代码
这几步都配置完成后就可以编译通过了，然后烧录调试完美块编程，包括快擦除等，已经验证！
借此说下王志杰的例程我实验过，但是写0就挂掉，不知道什么原因，还有两把密钥的顺序不是随便的，解锁eeprom时顺序是0xae,0x56，解锁flash时顺序是0x56,0xae，我见过网上有人说顺序不分的，纠正下，不要误人子弟！
网上关于stm8s的学习资料很多很泛滥，其实有用的就那点，等我抽时间整理出一套来分享，以便后人学习！
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