Posted on May 17, 2011 at 11:32Hi Everybody,
I am quite new to STR912 and please allow me to ask the simple questions.
I am using MTBSTR9 eval board and Keil MDK to implement SPI communications.
SSP0 sends data out as the master device and SSP1 receives data as the slave.
Enable SSP1_IT_RxFifo interrupt in order to receive data from SSP0.
The issue is that I get only one time SSP1_IT_RxFifo interrupt and then cannot get in the interrupt any more. Could you please take a look at my code and give me a clue what I may miss?
Many many thanks.
The following is my code for SSP0 and SSP1 configuration.
/* SCU configuration */
SCU_Configuration();
/* GPIO pins configuration */
GPIO_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);
/* SSP1 configuration */
SSP_DeInit(SSP1);
SSP_InitStructure.SSP_Mode = SSP_Mode_Slave;
SSP_InitStructure.SSP_SlaveOutput = SSP_SlaveOutput_Enable;
SSP_Init(SSP1, &SSP_InitStructure);
/* Enable SSP1 receive interrupt */
SSP_ITConfig(SSP1, SSP_IT_RxFifo|SSP_IT_RxTimeOut, ENABLE);
// SSP1 interrupt configuration
// VIC0 configuration
VIC_DeInit();
VIC_Config(SSP1_ITLine, VIC_IRQ, 1);
VIC_ITCmd(SSP1_ITLine, ENABLE);
/* SSP0 enable */
SSP_Cmd(SSP0, ENABLE);
/* SSP1 enable */
SSP_Cmd(SSP1, ENABLE);
while(Tx_Idx
{
SSP_SendData(SSP0, SSP0_Buffer_Tx[Tx_Idx++]);
}
*******************
SSP1 receive inerrupt route:
void SSP1_IRQHandler(void)
{
while(SSP_GetFlagStatus(SSP1, SSP_FLAG_RxFifoNotEmpty)==SET)
{
SSP1_Buffer_Rx[Rx_Idx++] = SSP_ReceiveData(SSP1);
}
SSP_ClearFlag(SSP1, SSP_FLAG_RxFifoNotEmpty);
VIC0 ->VAR = 0;
VIC1 ->VAR = 0;
}
