Posted on May 17, 2011 at 09:33Hi,
i´m tryinig to communicate over the SSP interface. I´ve tried the SSP example from ST and it works fine, but i can receive data even if there ist no connection between the MOSI and MISO PINs. The Data are given out on the MOSI Pin, but if I put the pin to ground i receive the sent data too. There must be a bug in the receive register. Has anyone an idea why?
Here´s my code:
/* SSP0 configuration */
SSP_DeInit(SSP0);
SSP_InitStructure.SSP_FrameFormat = SSP_FrameFormat_Motorola;
SSP_InitStructure.SSP_Mode = SSP_Mode_Master;
SSP_InitStructure.SSP_CPOL = SSP_CPOL_High;
SSP_InitStructure.SSP_CPHA = SSP_CPHA_2Edge;
SSP_InitStructure.SSP_DataSize = SSP_DataSize_8b;
SSP_InitStructure.SSP_ClockRate = 5;
SSP_InitStructure.SSP_ClockPrescaler = 2;
SSP_Init(SSP0, &SSP_InitStructure);
/* SSP0 enable */
SSP_Cmd(SSP0, ENABLE);
for(k=0; k
SSP0_Buffer_Rx[k] = SSP_ReceiveData(SSP0);
Tx_Idx=Rx_Idx=0;
/* Slave to master transfer procedure */
while(Tx_Idx
{
SSP_SendData(SSP0, SSP0_Buffer_Tx[Tx_Idx++]);
while(SSP_GetFlagStatus(SSP0, SSP_FLAG_RxFifoNotEmpty)==RESET);
SSP0_Buffer_Rx[SSP0RxBufferControl++] = SSP_ReceiveData(SSP0);
}
greeni :-W [B]
