#include "MG32x02z_DRV.H"
#include <stdio.h>
#define URTX URT0
#define MYBINARYIMAGE2_LENGTH 20
uint8_t RcvBuf[MYBINARYIMAGE2_LENGTH]={0};//__attribute__((at(0x20001000)));
typedef uint8_t u8;
typedef uint16_t u16;
typedef uint32_t u32;
typedef uint64_t u64;
void CSC_Init (void)
{
CSC_PLL_TyprDef CSC_PLL_CFG;
UnProtectModuleReg(MEMprotect); // Setting flash wait state
MEM_SetFlashWaitState(MEM_FWAIT_ONE); // 50MHz> Sysclk >=25MHz
ProtectModuleReg(MEMprotect);
UnProtectModuleReg(CSCprotect);
CSC_CK_APB_Divider_Select(APB_DIV_1); // Modify CK_APB divider APB=CK_MAIN/1
CSC_CK_AHB_Divider_Select(AHB_DIV_1); // Modify CK_AHB divider AHB=APB/1
/* CK_HS selection */
CSC_IHRCO_Select(IHRCO_12MHz); // IHRCO Sel 12MHz
CSC_IHRCO_Cmd(ENABLE);
while(CSC_GetSingleFlagStatus(CSC_IHRCOF) == DRV_Normal);
CSC_ClearFlag(CSC_IHRCOF);
CSC_CK_HS_Select(HS_CK_IHRCO); // CK_HS select IHRCO
/* PLL */
/**********************************************************/
CSC_PLL_CFG.InputDivider=PLLI_DIV_2; // 12M/2=6M
CSC_PLL_CFG.Multiplication=PLLIx16; // 6M*16=96M
CSC_PLL_CFG.OutputDivider=PLLO_DIV_2; // PLLO=96M/2=48M
CSC_PLL_Config(&CSC_PLL_CFG);
CSC_PLL_Cmd(ENABLE);
while(CSC_GetSingleFlagStatus(CSC_PLLF) == DRV_Normal);
CSC_ClearFlag(CSC_PLLF);
/**********************************************************/
/* CK_MAIN */
CSC_CK_MAIN_Select(MAIN_CK_HS);
/* Configure ICKO function */
/* Configure peripheral clock */
CSC_PeriphProcessClockSource_Config(CSC_UART0_CKS, CK_APB);
CSC_PeriphOnModeClock_Config(CSC_ON_UART0,ENABLE);
CSC_PeriphOnModeClock_Config(CSC_ON_PortB,ENABLE);
CSC_PeriphOnModeClock_Config(CSC_ON_DMA,ENABLE);
ProtectModuleReg(CSCprotect);
}
int fputc(int ch,FILE *f)
{
URT_SetTXData(URTX,1,ch);
while(URT_GetITSingleFlagStatus(URTX,URT_IT_TC)==DRV_UnHappened);
URT_ClearITFlag(URTX,URT_IT_TC);
return ch;
}
void UartSendByte(int ch)
{
URT_SetTXData(URTX,1,ch);
while(URT_GetITSingleFlagStatus(URTX,URT_IT_TC)==DRV_UnHappened);
URT_ClearITFlag(URTX,URT_IT_TC);
}
void URT0_Init(void)
{
URT_BRG_TypeDef URT_BRG;
URT_Data_TypeDef DataDef;
PIN_InitTypeDef PINX_InitStruct;
//==Set GPIO init
//PB8 PPO TX ,PB9 ODO RX
PINX_InitStruct.PINX_Mode = PINX_Mode_PushPull_O; // Pin select Push Pull mode
PINX_InitStruct.PINX_PUResistant = PINX_PUResistant_Enable; // Enable pull up resistor
PINX_InitStruct.PINX_Speed = PINX_Speed_Low;
PINX_InitStruct.PINX_OUTDrive = PINX_OUTDrive_Level0; // Pin output driver full strength.
PINX_InitStruct.PINX_FilterDivider = PINX_FilterDivider_Bypass; // Pin input deglitch filter clock divider bypass
PINX_InitStruct.PINX_Inverse = PINX_Inverse_Disable; // Pin input data not inverse
PINX_InitStruct.PINX_Alternate_Function = PB8_AF_URT0_TX; // Pin AFS = URT0_TX
GPIO_PinMode_Config(PINB(8),&PINX_InitStruct); // TXD at PB8
PINX_InitStruct.PINX_Mode = PINX_Mode_OpenDrain_O; // Pin select Open Drain mode
PINX_InitStruct.PINX_Alternate_Function = PB9_AF_URT0_RX; // Pin AFS = URT0_RX
GPIO_PinMode_Config(PINB(9),&PINX_InitStruct); // RXD at PB9
//=====Set Clock=====//
//---Set BaudRate---//
URT_BRG.URT_InteranlClockSource = URT_BDClock_PROC;
URT_BRG.URT_BaudRateMode = URT_BDMode_Separated;
URT_BRG.URT_PrescalerCounterReload = 0; //Set PSR
URT_BRG.URT_BaudRateCounterReload = 3; //Set RLR
URT_BaudRateGenerator_Config(URTX, &URT_BRG); //BR115200 = f(CK_URTx)/(PSR+1)/(RLR+1)/(OS_NUM+1)
URT_BaudRateGenerator_Cmd(URTX, ENABLE); //Enable BaudRateGenerator
//---TX/RX Clock---//
URT_TXClockSource_Select(URTX, URT_TXClock_Internal); //URT_TX use BaudRateGenerator
URT_RXClockSource_Select(URTX, URT_RXClock_Internal); //URT_RX use BaudRateGenerator
URT_TXOverSamplingSampleNumber_Select(URTX, 25); //Set TX OS_NUM
URT_RXOverSamplingSampleNumber_Select(URTX, 25); //Set RX OS_NUM
URT_RXOverSamplingMode_Select(URTX, URT_RXSMP_3TIME);
URT_TX_Cmd(URTX, ENABLE); //Enable TX
URT_RX_Cmd(URTX, ENABLE); //Enable RX
//=====Set Mode=====//
//---Set Data character config---//
DataDef.URT_TX_DataLength = URT_DataLength_8;
DataDef.URT_RX_DataLength = URT_DataLength_8;
DataDef.URT_TX_DataOrder = URT_DataTyped_LSB;
DataDef.URT_RX_DataOrder = URT_DataTyped_LSB;
DataDef.URT_TX_Parity = URT_Parity_No;
DataDef.URT_RX_Parity = URT_Parity_No;
DataDef.URT_TX_StopBits = URT_StopBits_1_0;
DataDef.URT_RX_StopBits = URT_StopBits_1_0;
DataDef.URT_TX_DataInverse = DISABLE;
DataDef.URT_RX_DataInverse = DISABLE;
URT_DataCharacter_Config(URTX, &DataDef);
//---Set Mode Select---//
URT_Mode_Select(URTX, URT_URT_mode);
//---Set DataLine Select---//
URT_DataLine_Select(URTX, URT_DataLine_2);
//=====Set Data Control=====//
URT_RXShadowBufferThreshold_Select(URTX, URT_RXTH_1BYTE);
URT_IdlehandleMode_Select(URTX, URT_IDLEMode_No);
URT_TXGaudTime_Select(URTX, 0);
//=====Enable URT Interrupt=====//
//URT_IT_Cmd(URTX, URT_IT_RX, ENABLE);
//URT_ITEA_Cmd(URTX, ENABLE);
//NVIC_EnableIRQ(URT0_IRQn);
//=====Enable URT=====//
URT_Cmd(URTX, ENABLE);
//==See MG32x02z_URT0_IRQ.c when interrupt in
}
void DMA_Init(void)
{
DMA_BaseInitTypeDef DMATestPattern;
// ------------------------------------------------------------------------
// 1.Enable DMA
DMA_Cmd(ENABLE);
// ------------------------------------------------------------------------
// 2.Enable Channel0
DMA_Channel_Cmd(DMAChannel0, ENABLE);
// ------------------------------------------------------------------------
DMA_BaseInitStructure_Init(&DMATestPattern);
// 3.initial & modify parameter
// DMA channel select
DMATestPattern.DMAChx = DMAChannel0;
// channel x source/destination auto increase address
DMATestPattern.SrcSINCSel = DISABLE;
DMATestPattern.DestDINCSel = ENABLE;
// DMA source peripheral config
DMATestPattern.SrcSymSel = DMA_URT0_RX;
// DMA destination peripheral config
DMATestPattern.DestSymSel = DMA_MEM_Write;
// DMA Burst size config
DMATestPattern.BurstDataSize = DMA_BurstSize_1Byte;
// DMA transfer data count initial number
DMATestPattern.DMATransferNUM = MYBINARYIMAGE2_LENGTH;
// source/destination config
DMATestPattern.DMASourceAddr = &URT0->RDAT;
DMATestPattern.DMADestinationAddr = (uint32_t *)&RcvBuf;
URT_RXDMA_Cmd(URT0, ENABLE);
DMA_Base_Init(&DMATestPattern);
}
int main()
{
int i;
CSC_Init();
URT0_Init();
printf("Hello!\n");
DMA_Init();
DMA_StartRequest(DMAChannel0);
while(1)
{
i++;
if(i>=100000)
{
i=0;
if(RcvBuf[0]!='\0')printf("%s\n",RcvBuf);
memset(RcvBuf,0,20*sizeof(u8));
DMA_Channel_Cmd(DMAChannel0, DISABLE);
DMA_SetDestinationAddress(DMAChannel0, RcvBuf); //重设目标地址以设定好DMA传输目的地的首地址
DMA_Channel_Cmd(DMAChannel0, ENABLE);
DMA_StartRequest(DMAChannel0);
}
}
}
通过这个程序你会发现,使用DMA进行接收和发送,调用的方法是不一样的,需要区别对待,利用DMA发送需要发送一次就while一次dma传输完成的flag,而接收不需要,但是dma接收上面目前有个不太好的地方,不清楚是自己的程序是否还有点问题,急速dma接收时地址会默认往后增加,因此到了下一次接收时候,可能数据就会跑到接收区数组的后面的元素中去,因此需要接收完成后重新设置目标地址。