ST對STM8S系列都有提供固件庫，而不同的版本自然存在一些不同，版本也一直從V1.0.0升級到目前的V1.1.1。

環(huán)境： FWLIB V1.0.1版本，采用STM8SF103

在使用GPIO庫時(shí)，一個(gè)偶然發(fā)現(xiàn)stm8s_gpio.h中的宏定義是存在問題的。

代碼定義如下：

******************************************************************************

*@filestm8s_gpio.h

*@briefThisfilecontainsallfunctionsprototypeandmacrosfortheGPIOperipheral.

*@authorSTMicroelectronics-MCDApplicationTeam

*@versionV1.0.1

*@date09/22/2008

******************************************************************************

/**

*@briefGPIOmodes

*

*Bitsdefinitions:

*-Bit7:0=INPUTmode

*1=OUTPUTmode

*1=PULL-UP(input)orPUSH-PULL(output)

*-Bit5:0=Noexternalinterrupt(input)orNoslopecontrol(output)

*1=Externalinterrupt(input)orSlowcontrolenabled(output)

*-Bit4:0=Lowlevel(output)

*1=Highlevel(outputpush-pull)orHI-Z(outputopen-drain)

*/

typedefenum

{

GPIO_MODE_IN_FL_NO_IT=(u8)0b00000000,/*!

GPIO_MODE_IN_PU_NO_IT=(u8)0b01000000,/*!

GPIO_MODE_IN_FL_IT=(u8)0b00100000,/*!

GPIO_MODE_IN_PU_IT=(u8)0b01100000,/*!

GPIO_MODE_OUT_OD_LOW_FAST=(u8)0b10000000,/*!

GPIO_MODE_OUT_PP_LOW_FAST=(u8)0b11000000,/*!

GPIO_MODE_OUT_OD_LOW_SLOW=(u8)0b10100000,/*!

GPIO_MODE_OUT_PP_LOW_SLOW=(u8)0b11100000,/*!

GPIO_MODE_OUT_OD_HIZ_FAST=(u8)0b10010000,/*!

GPIO_MODE_OUT_PP_HIGH_FAST=(u8)0b11010000,/*!

GPIO_MODE_OUT_OD_HIZ_SLOW=(u8)0b10110000,/*!

GPIO_MODE_OUT_PP_HIGH_SLOW=(u8)0b11110000/*!

}GPIO_Mode_TypeDef;

我在main.c中是直接這樣用的 GPIO_Init(GPIOC,GPIO_PIN_ALL,GPIO_MODE_OUT_PP_HIGH_FAST); //將GPIOC所有IO口設(shè)置成推挽輸出，10M速度?？臻eIO口設(shè)置為輸出低電平能降低不必要的功耗。

但是調(diào)試查看寄存器時(shí)發(fā)現(xiàn) CR2寄存器全為0，不應(yīng)該才對。手冊上清晰的表明了為1為設(shè)置10M速度。

翻看stm8s_gpio.c中的GPIO_Init函數(shù)，有設(shè)置CR2寄存器，前提是根據(jù)GPIO_MODE掩碼來進(jìn)行判斷，判斷的根據(jù)就是 Bit 5。如下：

if((((u8)(GPIO_Mode))&(u8)0x20)!=(u8)0x00)/*InterruptorSlowslope*/

{

GPIOx->CR2|=GPIO_Pin;

}else/*NoexternalinterruptorNoslopecontrol*/

{

GPIOx->CR2&=(u8)(~(GPIO_Pin));

}

繼續(xù)查看固件庫，對于V1.1.1來說不存在這個(gè)問題，如：

******************************************************************************

*@filestm8s_gpio.h

*@briefThisfilecontainsallfunctionsprototypeandmacrosfortheGPIOperipheral.

*@authorSTMicroelectronics-MCDApplicationTeam

*@versionV1.1.1

*@date06/05/2009

******************************************************************************

/**

*@briefGPIOmodes

*

*Bitsdefinitions:

*-Bit7:0=INPUTmode

*1=OUTPUTmode

*1=PULL-UP(input)orPUSH-PULL(output)

*-Bit5:0=Noexternalinterrupt(input)orNoslopecontrol(output)

*1=Externalinterrupt(input)orSlowcontrolenabled(output)

*-Bit4:0=Lowlevel(output)

*1=Highlevel(outputpush-pull)orHI-Z(outputopen-drain)

*/

typedefenum

{

GPIO_MODE_IN_FL_NO_IT=(u8)0b00000000,/*!

GPIO_MODE_IN_PU_NO_IT=(u8)0b01000000,/*!

GPIO_MODE_IN_FL_IT=(u8)0b00100000,/*!

GPIO_MODE_IN_PU_IT=(u8)0b01100000,/*!

GPIO_MODE_OUT_OD_LOW_FAST=(u8)0b10100000,/*!

GPIO_MODE_OUT_PP_LOW_FAST=(u8)0b11100000,/*!

GPIO_MODE_OUT_OD_LOW_SLOW=(u8)0b10000000,/*!

GPIO_MODE_OUT_PP_LOW_SLOW=(u8)0b11000000,/*!

GPIO_MODE_OUT_OD_HIZ_FAST=(u8)0b10110000,/*!

GPIO_MODE_OUT_PP_HIGH_FAST=(u8)0b11110000,/*!

GPIO_MODE_OUT_OD_HIZ_SLOW=(u8)0b10010000,/*!

GPIO_MODE_OUT_PP_HIGH_SLOW=(u8)0b11010000/*!

}GPIO_Mode_TypeDef;

同樣是GPIO_MODE_OUT_PP_HIGH_FAST，前者定義為 0b11010000，而后者則是 0b11110000。

后來從發(fā)行日志里也了解到，ST已經(jīng)更正了這個(gè)錯(cuò)誤。

V1.1.1 - 06/05/2009

@code
General
-------
+ Project template updated for both STVD and RIDE toolchains
+ Almost peripheral examples reviewed and validated with both Cosmic and Raisonance
compilers

library
-------
+ stm8s.h:
- __CONST definition added for Cosmic and Raisonance compilers
- TINY definition added for Cosmic and Raisonance compilers
- NEAR definition added for Raisonance compilers
- CAN registers declaration updated
- ADC1 registers declaration updated

+ stm8s_adc1.h:
- IS_ADC1_BUFFER_OK macro definition updated

+ stm8s_beep.c:
- BEEP_Init function updated
- BEEP->CSR |= BEEP_CSR_BEEPEN; removed from init function

+ stm8s_can.c/.h:
- Private variables declaration changed to volatile
- CAN_DeInit function updated
- CAN_Receive function updated
- CAN_FilterInit funtion updated
- CAN_Transmit function updated
- CAN_IT_TypeDef enum updated:
- CAN_IT_ERR and CAN_IT_LEC definition updated to avoid ANSI check
error with Cosmic

+ stm8s_clk.h:
- CLK_Peripheral_TypeDef enum updated:
- CLK_PERIPHERAL_UART1 definition updated and conditioned by the
device to use


+ stm8s_gpio.h:
- The GPIO_Mode_TypeDef enum element definition updated:
- GPIO_MODE_OUT_OD_LOW_FAST
- GPIO_MODE_OUT_PP_LOW_FAST
- GPIO_MODE_OUT_OD_LOW_SLOW
- GPIO_MODE_OUT_PP_LOW_SLOW
- GPIO_MODE_OUT_OD_HIZ_FAST
- GPIO_MODE_OUT_PP_HIGH_FAST
- GPIO_MODE_OUT_OD_HIZ_SLOW
- GPIO_MODE_OUT_PP_HIGH_SLOW