void SpiCC3000DMAInit(void)
{
NVIC_InitTypeDef NVIC_RxInt_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(SPI_DMA_RX_CHANNEL);
DMA_DeInit(SPI_DMA_TX_CHANNEL);
/* Configure and enable SPI DMA TX Channel interrupt */
NVIC_RxInt_InitStructure.NVIC_IRQChannel = DMA1_Channel3_IRQn;
NVIC_RxInt_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_RxInt_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_RxInt_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_RxInt_InitStructure);
/* Enable the DMA Channels Interrupts */
DMA_ITConfig(SPI_DMA_TX_CHANNEL, DMA_IT_TC, ENABLE); //传输完成中断打开
DMA_ITConfig(SPI_DMA_RX_CHANNEL, DMA_IT_TC, ENABLE);
/* Configure DMA Peripheral but don't send data*/
CC3000_DMA_Config(SPI_DMA_RX, (uint8_t*)wlan_rx_buffer,0);
CC3000_DMA_Config(SPI_DMA_TX, (uint8_t*)wlan_tx_buffer,0);
/* Enable SPI DMA request */
SPI_I2S_DMACmd(SPI_BASE,SPI_I2S_DMAReq_Rx, ENABLE);
SPI_I2S_DMACmd(SPI_BASE,SPI_I2S_DMAReq_Tx, ENABLE);
/* Enable DMA RX Channel */
DMA_Cmd(SPI_DMA_RX_CHANNEL, ENABLE);
/* Enable DMA TX Channel */
DMA_Cmd(SPI_DMA_TX_CHANNEL, ENABLE);
}
int SpiIO(eSPIOperation op, const uint8_t *ptrData, uint32_t ulDataSize, int waitOnCompletion)
{
eCC3000States current = State();
/* Disable DMA Channels */
CC3000_SPI_DMA_Channels(DISABLE);
if (op == eRead)
{
CC3000_DMA_Config(CC3000_DMA_RX, (uint8_t*) ptrData, ulDataSize);
CC3000_DMA_Config(CC3000_DMA_TX, (uint8_t*) spi_readCommand, ulDataSize);
}
else
{
CC3000_DMA_Config(CC3000_DMA_RX, (uint8_t*) sSpiInformation.pRxPacket, ulDataSize);
CC3000_DMA_Config(CC3000_DMA_TX, (uint8_t*) ptrData, ulDataSize);
}
/* Enable DMA SPI Interrupt */
DMA_ITConfig(CC3000_SPI_TX_DMA_CHANNEL, DMA_IT_TC, ENABLE);
/* Enable DMA Channels */
CC3000_SPI_DMA_Channels(ENABLE);
return waitOnCompletion ? Still(current) : 0;
}
void SpiDMATXReconfig(unsigned char *tx_buffer,unsigned short NumData)
{
DMA_DeInit(SPI_DMA_TX_CHANNEL);
DMA_ITConfig(SPI_DMA_TX_CHANNEL, DMA_IT_TC, ENABLE); //传输完成中断打开
CC3000_DMA_Config(SPI_DMA_TX, (uint8_t*)tx_buffer,NumData);
DMA_Cmd(SPI_DMA_TX_CHANNEL, ENABLE);
}
