各路英雄好,我全用
STM32f030c8t6不久,现需要它只接收
ARM9的spi数据即可,arm9这边的是用了很多年的系统,使用spi 400Khz CPOL=0, CPHA=0的方式往外发近100字节的连续数据。使用逻辑分析仪抓的波形比较好,但现在我使用c8t6的SPI2做从机, 中断中收到后打印的全是0, 希望有经验的GGJJ指点一下,在此谢过了!! 如下为初始化代码,是参考的官方例程STM32F0xx_StdPeriph_Lib_V1.3.1ProjectsSTM32F0xx_StdPeriph_ExamplesSPISPI_TwoBoardsDataExchangeInterrupt这里面的代码,而且我再三确认过ARM9 CS--> 030 CS ARM9 MOSI---> 030 MOSI ARM9 sck ---> 030 SCK
sta
tic void SPI2_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the SPI periph */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
/* Enable SCK, MOSI, MISO and NSS GPIO clocks */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource12, GPIO_AF_0);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_0);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_0);
//GPIO_PinAFConfig(RCC_AHBPeriph_GPIOA, SPIx_MISO_SOURCE, SPIx_MISO_AF);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
/* SPI CS pin configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* SPI SCK pin configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* SPI MOSI pin configuration */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* SPI MISO ---> A0 Input GPIO configuration */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;
GPIO_Init(GPIOB, &GPIO_InitStructure);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, ENABLE);
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI2, DISABLE);
/* SPI configuration -------------------------------------------------------*/
SPI_I2S_DeInit(SPI2);
//SPI_Cmd(SPI2, DISABLE);
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;//SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStructure);
/* Configure the SPI interrupt priority */
NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Initialize the FIFO threshold */
SPI_RxFIFOThresholdConfig(SPI2, SPI_RxFIFOThreshold_QF);
/* Enable the Rx buffer not empty interrupt */
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_RXNE, ENABLE);
/* Enable the SPI Error interrupt */
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_ERR, ENABLE);
/* Enable the SPI peripheral */
SPI_Cmd(SPI2, ENABLE);
}
void SPI2_IRQHandler(void)
{
//#if defined (SPI_SLAVE)
#if 1
#if 0
/* SPI in Slave Tramitter mode--------------------------------------- */
if (SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_TXE) == SET)
{
SPI_SendData8(SPI2, TxBuffer[Tx_Idx++]);
if (Tx_Idx == GetVar_NbrOfData())
{
/* Disable the Tx buffer empty interrupt */
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_TXE, DISABLE);
}
}
#endif
/* SPI in Slave Receiver mode--------------------------------------- */
while(SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_RXNE) == SET)
{
RxChr = SPI_ReceiveData8(SPI2);
printf("%02x ", RxChr);
RxBuffer[Rx_Idx++] = RxChr;
if(Rx_Idx==64)
Rx_Idx = 0;
}
#if 1
/* SPI Error interrupt--------------------------------------- */
if (SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_OVR) == SET)
{
SPI_ReceiveData8(SPI2);
SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_OVR);
printf("OV ");
}
#endif
#if 1
/* SPI Error interrupt--------------------------------------- */
if (SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_FRE) == SET)
{
SPI_ReceiveData8(SPI2);
SPI_I2S_GetITStatus(SPI2, SPI_I2S_IT_FRE);
printf("FE ");
}
#endif
#endif /* SPI_SLAVE*/
在线等待啊,
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