读取数据全为0,折腾了两天了,麻烦各位大神帮忙看看,万分感谢 void Touch_Init(void) { NVIC_InitTypeDef NVIC_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; SPI_InitTypeDef SPI_InitStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC , ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;//ÉÏÀÍìÍÆÊä³ö GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOC, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF ; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; GPIO_Init(GPIOC, &GPIO_InitStructure); SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource9); EXTI_InitStructure.EXTI_Line = EXTI_Line9; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); GPIO_PinAFConfig (GPIOC, GPIO_Pin_11|GPIO_Pin_12|GPIO_Pin_10, GPIO_AF_6); SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge ; SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; SPI_InitStructure.SPI_CRCPolynomial = 7; SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_Mode = SPI_Mode_Master; SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; SPI_Init(SPI3,&SPI_InitStructure); SPI_Cmd(SPI3, ENABLE); NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } u16 Read_AD(u8 CMD) { u16 num=0,num1=0; TCS_ON; delay_us(10); //while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET); SPI_SendData8(SPI3,CMD);//·¢ËÍÃüÁî×Ö delay_us(10); //while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET); num=SPI_ReceiveData8(SPI3); num1=SPI_ReceiveData8(SPI3); TCS_OFF; num<<=8; num|=num1; num>>=3; num&=0xfff; return(num); } |
看过网上的例子还有正点原子的,都是这样的啊