请教STM32 + ST8024 读卡问题，谢谢！！！

bqiu 提问时间：2011-11-16 16:50 /

用STM32F10+ST8024读IC卡，但是总是没有ATR过来

很奇怪！用的是ST demo程序里面的smartcard.c/.h

如下是MCU脚的配置，pin11接的是ST8024的OFF，pin15是插IC卡中断拉PRES。

TX用的是PB.10, CLK PB.12

#define SC_3_5V GPIO_Pin_14
#define SC_RESET GPIO_Pin_12
#define SC_CMDVCC GPIO_Pin_13
#define SC_OFF GPIO_Pin_11

其他如UART3的设置主要是smartcard.c里面init设置，无改动。

NVIC_InitTypeDef NVIC_InitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);

   /* Configure Smartcard CMDVCC */
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(GPIOD, &GPIO_InitStructure);
   GPIO_SetBits(GPIOD, GPIO_Pin_13);

   /* Configure Smartcard OFF */
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
   GPIO_Init(GPIOD, &GPIO_InitStructure);

/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

/* Clear the SC_EXTI_IRQ Pending Bit */
NVIC_ClearIRQChannelPendingBit(EXTI15_10_IRQChannel);

NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

/* Enable the USART3 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_Init(&NVIC_InitStructure);

/* Smartcard OFF Pin */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOD, GPIO_PinSource11);
/* Clear SC EXTI Line Pending Bit */
EXTI_ClearITPendingBit(EXTI_Line11);

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_Line = EXTI_Line11;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
   EXTI_GenerateSWInterrupt(EXTI_Line11);

//PB15
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
/* Clear EXTI Line Pending Bit */
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource15);
EXTI_ClearITPendingBit(EXTI_Line15);
   //PB15 IC卡插入中断

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
EXTI_InitStructure.EXTI_Line = EXTI_Line15;
EXTI_Init(&EXTI_InitStructure);
EXTI_GenerateSWInterrupt(EXTI_Line15);

//PD15
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_SetBits(GPIOD, GPIO_Pin_15);
}