中文字元在Keil中導致的錯誤問題（錯誤程式碼：#7 #12-D #20 #223-D #247）
在寫完串列埠chen程式bian編譯時發現報錯 27 Error(s), 13 Warning(s)，主要錯誤還在main.c中，通過百度發現主要是 #7錯誤，錯誤提示如下：
*** Using Compiler 'V5.06 update 5 (build 528)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin'
Rebuild target 'Demo'
assembling startup_stm32f10x_hd.s...
compiling core_cm3.c...
compiling misc.c...
compiling stm32f10x_bkp.c...
compiling system_stm32f10x.c...
compiling stm32f10x_cec.c...
compiling stm32f10x_adc.c...
compiling stm32f10x_can.c...
compiling stm32f10x_crc.c...
compiling stm32f10x_dma.c...
compiling stm32f10x_dbgmcu.c...
compiling stm32f10x_dac.c...
compiling stm32f10x_flash.c...
compiling stm32f10x_exti.c...
compiling stm32f10x_fsmc.c...
compiling stm32f10x_gpio.c...
compiling stm32f10x_pwr.c...
compiling stm32f10x_iwdg.c...
compiling stm32f10x_rtc.c...
compiling stm32f10x_i2c.c...
compiling stm32f10x_rcc.c...
compiling stm32f10x_sdio.c...
compiling stm32f10x_spi.c...
compiling stm32f10x_wwdg.c...
compiling main.c...
..\..\User\usart\bsp_usart1.h(11): error: #7: unrecognized token
void Usart_SendByte( USART_TypeDef *pUSARTx, uint8_t ch)；
..\..\User\usart\bsp_usart1.h(11): error: #130: expected a "{"
void Usart_SendByte( USART_TypeDef *pUSARTx, uint8_t ch)；
..\..\User\usart\bsp_usart1.h(12): error: #7: unrecognized token
void Usart_SendString( USART_TypeDef *pUSARTx, char *str)；
..\..\User\main.c(50): warning: #12-D: parsing restarts here after previous syntax error
{
..\..\User\main.c(52): error: #20: identifier "b" is undefined
for(c=0;c<b;c++)
..\..\User\main.c(59): warning: #223-D: function "SPI_SPI2_Config" declared implicitly
SPI_SPI2_Config();
..\..\User\main.c(60): warning: #223-D: function "MS_Config" declared implicitly
MS_Config();
..\..\User\main.c(61): warning: #223-D: function "EXTI_IO_Config" declared implicitly
EXTI_IO_Config();
..\..\User\main.c(62): warning: #223-D: function "TIM2_Configuration" declared implicitly
TIM2_Configuration();
..\..\User\main.c(88): error: #20: identifier "INCTCD_num" is undefined
INCTCD_num = 0x0140;
..\..\User\main.c(89): error: #20: identifier "PSUMCD_num" is undefined
PSUMCD_num = 19125/INCTCD_num; //INCTAB_num * PSUMAB_num; //17ms PSUMCD_num的值由 INCTCD_num決定
..\..\User\main.c(91): error: #20: identifier "INCTAB_num" is undefined
INCTAB_num = 0x4AB5;
..\..\User\main.c(92): error: #20: identifier "PSUMAB_num" is undefined
PSUMAB_num = 19125/INCTAB_num; //INCTAB_num * PSUMAB_num; //17ms PSUMCD_num的值由 INCTCD_num決定
..\..\User\main.c(94): warning: #223-D: function "Spi_Write" declared implicitly
Spi_Write(0x24,0x0d00 | PSUMAB_num); //0x0dff
..\..\User\main.c(115): error: #20: identifier "flag1" is undefined
if(flag1==0) //
..\..\User\main.c(118): error: #20: identifier "INCTAB_num" is undefined
INCTAB_num = INCTAB_num - 50; //加速 只需要把改值按照 速度曲線變化就可以改變速度，現在演示的是線性的速度變化
..\..\User\main.c(124): error: #20: identifier "PSUMAB_num" is undefined
PSUMAB_num = 19125/INCTAB_num;
..\..\User\main.c(125): warning: #223-D: function "Spi_Write" declared implicitly
Spi_Write(0x24,0x0d00 | PSUMAB_num); //0x0dff
..\..\User\main.c(129): error: #20: identifier "INCTCD_num" is undefined
INCTCD_num = INCTCD_num+ 30;
..\..\User\main.c(134): error: #20: identifier "PSUMCD_num" is undefined
PSUMCD_num = 19125/INCTCD_num;
..\..\User\main.c(156): error: #20: identifier "INCTAB_num" is undefined
INCTAB_num = INCTAB_num + 30; //減速
..\..\User\main.c(162): error: #20: identifier "PSUMAB_num" is undefined
PSUMAB_num = 19125/INCTAB_num;
..\..\User\main.c(163): warning: #223-D: function "Spi_Write" declared implicitly
Spi_Write(0x24,0x0d00 | PSUMAB_num); //0x0dff
..\..\User\main.c(167): error: #20: identifier "INCTCD_num" is undefined
INCTCD_num = INCTCD_num - 50;
..\..\User\main.c(172): error: #20: identifier "PSUMCD_num" is undefined
PSUMCD_num = 19125/INCTCD_num;
..\..\User\main.c(205): warning: #223-D: function "Delay" declared implicitly
Delay(60);
..\..\User\main.c(209): error: #20: identifier "flag1" is undefined
flag1 = !flag1;
..\..\User\main.c(216): warning: #223-D: function "Delay" declared implicitly
Delay(60);
..\..\User\main.c(220): warning: #223-D: function "MS_Rest" declared implicitly
MS_Rest();
..\..\User\main.c(221): warning: #223-D: function "MS_Int1" declared implicitly
MS_Int1();
..\..\User\main.c(224): error: #20: identifier "INCTCD_num" is undefined
INCTCD_num = 0x0120;
..\..\User\main.c(225): error: #20: identifier "PSUMCD_num" is undefined
PSUMCD_num = 19125/INCTCD_num; //INCTAB_num * PSUMAB_num; //5ms
..\..\User\main.c(227): error: #20: identifier "INCTAB_num" is undefined
INCTAB_num = 0x4AB5;
..\..\User\main.c(228): error: #20: identifier "PSUMAB_num" is undefined
PSUMAB_num = 19125/INCTAB_num; //INCTAB_num * PSUMAB_num; //5ms
..\..\User\main.c: 12 warnings, 22 errors
compiling stm32f10x_usart.c...
compiling bsp_usart1.c...
..\..\User\usart\bsp_usart1.h(11): error: #7: unrecognized token
void Usart_SendByte( USART_TypeDef *pUSARTx, uint8_t ch)；
..\..\User\usart\bsp_usart1.h(11): error: #130: expected a "{"
void Usart_SendByte( USART_TypeDef *pUSARTx, uint8_t ch)；
..\..\User\usart\bsp_usart1.h(12): error: #7: unrecognized token
void Usart_SendString( USART_TypeDef *pUSARTx, char *str)；
..\..\User\usart\bsp_usart1.c(28): warning: #12-D: parsing restarts here after previous syntax error
{
..\..\User\usart\bsp_usart1.c(89): error: #20: identifier "SendBuff" is undefined
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SendBuff;
..\..\User\usart\bsp_usart1.c(128): error: #247: function "Usart_SendByte" has already been defined
void Usart_SendByte( USART_TypeDef *pUSARTx, uint8_t ch)
..\..\User\usart\bsp_usart1.c: 1 warning, 5 errors
compiling stm32f10x_it.c...
compiling stm32f10x_tim.c...
compiling bsp_SPI.c...
compiling bsp_41908.c...
compiling bsp_exti.c...
compiling bsp_TiMbase.c...
"..\..\Output\Template.axf" - 27 Error(s), 13 Warning(s).
Target not created.
Build Time Elapsed: 00:00:03
引用網友解決辦法：
..\main.c(173): error: #7: unrecognized token
這個錯誤可能是拷貝的時候，中間有中文，或者其他不能識別的，看不見的字元。keil 編譯的時候就會出錯。
解決：找到那一行，刪除那些不可見的字元即可。