Posted on April 04, 2014 at 16:43Hi all,
I
would like to know
if anyone has a problem when
enabling
the Tx buffer empty interrupt. In fact, when i put
SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_TXE, ENABLE); , the code coming after can't be executed
switch (USBButton)
{
/* BUTTON_USER button pressed */
case 0x01:
SendMode=0x01;
ReceveMode=0x00;
CmdTransmitted = 0x01;
break;
.
.
.
}
if (CmdTransmitted != 0x00)
{
/* Enable the Tx buffer empty interrupt */
SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_TXE, ENABLE);
/* Transmission mode */
if(SendMode==0x01)
{
STM_EVAL_LEDOn(LED7);
while(CmdStatus==0x00);
while(Tx_Idx < DATA_SIZE);
/* Waiting until TX FIFO is empty */
while (SPI_GetTransmissionFIFOStatus(SPI1) != SPI_TransmissionFIFOStatus_Empty)
{}
/* Wait busy flag */
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET)
{}
}
/*------SPI handler --------*/
void SPI1_IRQHandler(void)
{
/* SPI in Master Tramitter mode--------------------------------------- */
if (SPI_I2S_GetITStatus(SPI1, SPI_I2S_IT_TXE) == SET)
{
if (CmdStatus == 0x00)
{
SPI_SendData8(SPI1, CmdTransmitted);
CmdStatus = 0x01;
Tx_Idx=0x00;
STM_EVAL_LEDOn(LED5);
}
else
{
if(SendMode)
{
SPI_SendData8(SPI1, CommandRegister_Tx[Tx_Idx++]);
STM_EVAL_LEDOn(LED3);
if (Tx_Idx == 4)
{
STM_EVAL_LEDOn(LED10);
/* Disable the Tx buffer empty interrupt */
SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_TXE, DISABLE);
}
}
}
}
This code is for the master. In the slave side, i can receive what the master sends but it doesn't enter to
if(SendMode==0x01). Any suggestion.
I hope that it's clear enough to understand the issue.
