Posted on February 22, 2015 at 17:49Hi, I'm currently trying to send data from one STM32F4 board as a master to the other STM32F4 board which is the slave via SPI.
However recever data are incorect.
//************************Code Master************************************
void spi_init()
{
GPIO_InitTypeDef gpio;
SPI_InitTypeDef spi1;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE);
GPIO_StructInit(&gpio);
gpio.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
gpio.GPIO_Mode = GPIO_Mode_AF;
gpio.GPIO_Speed = GPIO_Speed_50MHz;
gpio.GPIO_OType = GPIO_OType_PP;
gpio.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOA,&gpio);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_SPI1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_SPI1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_SPI1);
SPI_I2S_DeInit(SPI1);
SPI_StructInit(&spi1);
spi1.SPI_Mode = SPI_Mode_Master;
spi1.SPI_DataSize = SPI_DataSize_16b;
spi1.SPI_NSS = SPI_NSS_Soft;
SPI_Init(SPI1,&spi1);
SPI_Cmd(SPI1,ENABLE);
}
void spi_send(uint16_t data)
{
SPI_I2S_SendData(SPI1,data);
while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE) == RESET);
}
int main()
{
spi_init();
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDOn(LED3);
while(1)
{
spi_send(0x0001);
}
return 0;
}
//******************************Code Slave****************************************
uint16_t data = 0x0000;
void spi_init()
{
GPIO_InitTypeDef gpio;
SPI_InitTypeDef spi2;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
GPIO_StructInit(&gpio);
gpio.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
gpio.GPIO_Mode = GPIO_Mode_AF;
gpio.GPIO_Speed = GPIO_Speed_50MHz;
gpio.GPIO_OType = GPIO_OType_PP;
gpio.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOB,&gpio);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource14,GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource15,GPIO_AF_SPI2);
SPI_I2S_DeInit(SPI2);
SPI_StructInit(&spi2);
spi2.SPI_Mode = SPI_Mode_Slave;
spi2.SPI_DataSize = SPI_DataSize_16b;
spi2.SPI_NSS = SPI_NSS_Soft;
SPI_Init(SPI2,&spi2);
SPI_Cmd(SPI2,ENABLE);
}
uint16_t spi_receve()
{
uint16_t received ;
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET);
received = SPI_I2S_ReceiveData(SPI2);
return received;
}
int main()
{
spi_init();
STM_EVAL_LEDInit(LED3);
while(1)
{
data = spi_receve(); //
data are correct
0x0800....0x0008....0x0000 if (data == 0x0001)
STM_EVAL_LEDOn(LED3);
}
return 0;
}
///////////////////////////////
Help me please.....thanks
#stm32f4-discovery
