/*
* ======== SPICC3200DMA_initHw ========
*/
static void SPICC3200DMA_initHw(SPI_Handle handle)
{
SPICC3200DMA_Object *object = handle->object;
SPICC3200DMA_HWAttrs const *hwAttrs = handle->hwAttrs;
/* Configure the SPI peripheral */
MAP_SPICSDisable(hwAttrs->baseAddr);
MAP_SPIDisable(hwAttrs->baseAddr);
MAP_SPIReset(hwAttrs->baseAddr);
/*
* To support 4-32 bit lengths, object->dataSize must be formatted to meet
* hardware requirement.
*/
MAP_SPIConfigSetExpClk(hwAttrs->baseAddr,
MAP_PRCMPeripheralClockGet(hwAttrs->spiPRCM),
object->bitRate,
mode[object->spiMode],
frameFormat[object->frameFormat],
(hwAttrs->csControl | hwAttrs->pinMode |
hwAttrs->turboMode | hwAttrs->csPolarity |
((object->dataSize - 1) << 7)));
/* Enable FIFOs, DMA, & interrupts */
MAP_SPIFIFOEnable(hwAttrs->baseAddr, SPI_RX_FIFO | SPI_TX_FIFO);
MAP_SPIDmaEnable(hwAttrs->baseAddr, SPI_RX_DMA | SPI_TX_DMA);
MAP_SPIFIFOLevelSet(hwAttrs->baseAddr, object->txFifoTrigger,
object->rxFifoTrigger);
}
static void DMATransceive( bool bPowerEn,
unsigned char ucZoom,
unsigned char ucGain,
unsigned char ucLine,
unsigned char* pSndBuf, // 发送缓冲区
unsigned char* pRcvBuf // 接收缓冲区
)
{
// 准备发送的命令
unsigned short usCommand = 0x0000;
if (bPowerEn)
usCommand |= 0x8000;
usCommand |= (ucZoom & 0x03) << 6;
//usCommand |= (ucGain & 0x3F);
usCommand |= (ucGain & 0x7E) >> 1;
usCommand |= (ucLine & 0x7F) << 8;
//usCommand = 0x3F80;
unsigned char ucL = (usCommand & 0x00FF);
unsigned char ucH = ((usCommand & 0xFF00) >> 8);
for (int i=0;i<20;i++) {
pSndBuf[i*2] = ucL;
pSndBuf[i*2+1] = ucH;
}
//TRACE("0x%x -- 0x%x\r\n",usCommand,ucLine);
// 启动DMA
SetupTransfer(UDMA_CH31_GSPI_TX ,
UDMA_MODE_BASIC,
512,
UDMA_SIZE_8,
UDMA_ARB_1,
(void *)pSndBuf,
UDMA_SRC_INC_8,
(void *)(GSPI_BASE+MCSPI_O_TX0),
UDMA_DST_INC_NONE);
SetupTransfer(UDMA_CH30_GSPI_RX ,
UDMA_MODE_BASIC,
512,
UDMA_SIZE_8,
UDMA_ARB_1,
(void *)(GSPI_BASE+MCSPI_O_RX0),
UDMA_SRC_INC_NONE,
(void *)pRcvBuf,
UDMA_DST_INC_8);
MAP_SPIDmaEnable(GSPI_BASE, SPI_RX_DMA | SPI_TX_DMA);
}
Fd_t spi_Open(char *ifName, unsigned long flags)
{
unsigned long ulBase;
unsigned long ulSpiBitRate;
tROMVersion* pRomVersion = (tROMVersion *)(ROM_VERSION_ADDR);
//NWP master interface
ulBase = LSPI_BASE;
//Enable MCSPIA2
MAP_PRCMPeripheralClkEnable(PRCM_LSPI,PRCM_RUN_MODE_CLK|PRCM_SLP_MODE_CLK);
//Disable Chip Select
MAP_SPICSDisable(ulBase);
//Disable SPI Channel
MAP_SPIDisable(ulBase);
// Reset SPI
MAP_SPIReset(ulBase);
//
// Configure SPI interface
//
if(pRomVersion->ucMinorVerNum == ROM_VER_PG1_21 )
{
ulSpiBitRate = SPI_RATE_13M;
}
else if(pRomVersion->ucMinorVerNum == ROM_VER_PG1_32)
{
ulSpiBitRate = SPI_RATE_13M;
}
else if(pRomVersion->ucMinorVerNum >= ROM_VER_PG1_33)
{
ulSpiBitRate = SPI_RATE_20M;
}
MAP_SPIConfigSetExpClk(ulBase,MAP_PRCMPeripheralClockGet(PRCM_LSPI),
ulSpiBitRate,SPI_MODE_MASTER,SPI_SUB_MODE_0,
(SPI_SW_CTRL_CS |
SPI_4PIN_MODE |
SPI_TURBO_OFF |
SPI_CS_ACTIVEHIGH |
SPI_WL_32));
if(MAP_PRCMPeripheralStatusGet(PRCM_UDMA))
{
g_ucDMAEnabled = (HWREG(UDMA_BASE + UDMA_O_CTLBASE) != 0x0) ? 1 : 0;
}
else
{
g_ucDMAEnabled = 0;
}
#ifdef SL_CPU_MODE
g_ucDMAEnabled = 0;
#endif
if(g_ucDMAEnabled)
{
memset(g_ucDinDout,0xFF,sizeof(g_ucDinDout));
// Set DMA channel
cc_UDMAChannelSelect(UDMA_CH12_LSPI_RX);
cc_UDMAChannelSelect(UDMA_CH13_LSPI_TX);
MAP_SPIFIFOEnable(ulBase,SPI_RX_FIFO);
MAP_SPIFIFOEnable(ulBase,SPI_TX_FIFO);
MAP_SPIDmaEnable(ulBase,SPI_RX_DMA);
MAP_SPIDmaEnable(ulBase,SPI_TX_DMA);
MAP_SPIFIFOLevelSet(ulBase,1,1);
#if defined(SL_PLATFORM_MULTI_THREADED)
osi_InterruptRegister(INT_LSPI, (P_OSI_INTR_ENTRY)DmaSpiSwIntHandler,INT_PRIORITY_LVL_1);
MAP_SPIIntEnable(ulBase,SPI_INT_EOW);
osi_MsgQCreate(&DMAMsgQ,"DMAQueue",sizeof(int),1);
#else
MAP_IntRegister(INT_LSPI,(void(*)(void))DmaSpiSwIntHandler);
MAP_IntPrioritySet(INT_LSPI, INT_PRIORITY_LVL_1);
MAP_IntEnable(INT_LSPI);
MAP_SPIIntEnable(ulBase,SPI_INT_EOW);
g_cDummy = 0x0;
#endif
}
MAP_SPIEnable(ulBase);
g_SpiFd = 1;
return g_SpiFd;
}
