STC micro STC8A8K64D4 Series - Page 683

STC8A8K64D4 Series Manual
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{
if((DMATxFlag) && (DMARxFlag))
{
CheckSum = crc16_ccitt(DMABuffer,DMA_AMT_LEN-1);
if(((u8)CheckSum == DMABuffer[DMA_AMT_LEN-1]) &&
((u8)(CheckSum>>8) == DMABuffer[DMA_AMT_LEN]))
{
printf("\r\nOK! CheckSum = %04x\r\n",CheckSum);
}
else
{
printf("\r\nERROR! CheckSum = %04x\r\n",CheckSum);
}
DMATxFlag = 0;
DMA_UR1T_CR = 0xc0; //bit7 1:Enable UART1_DMA,
//bit6 1:Start UART1_DMA automatic transmission
DMARxFlag = 0;
DMA_UR1R_CR = 0xa1; //bit7 1:Enable UART1_DMA,
//bit5 1:Start UART1_DMA automatic reception,
//bit0 1:clear FIFO
}
}
}
void DMA_Config(void)
{
P_SW2 = 0x80;
DMA_UR1T_CFG = 0x80; //bit7 1:Enable Interrupt
DMA_UR1T_STA = 0x00;
DMA_UR1T_AMT = DMA_AMT_LEN; // Set total bytes to be transferred ： n+1
DMA_UR1T_TXA = DMABuffer;
DMA_UR1T_CR = 0xc0; //bit7 1:Enable UART1_DMA,
//bit6 1:Start UART1_DMA automatic transmission
DMA_UR1R_CFG = 0x80; //bit7 1:Enable Interrupt
DMA_UR1R_STA = 0x00;
DMA_UR1R_AMT = DMA_AMT_LEN; // Set total bytes to be transferred ： n+1
DMA_UR1R_RXA = DMABuffer;
DMA_UR1R_CR = 0xa1; //bit7 1:Enable UART1_DMA,
//bit5 1:Start UART1_DMA automatic reception, bit0 1:clear
FIFO
}
void SetTimer2Baudraye(u16 dat) //select baud rate:
//2: Use Timer2 as baud rate generator,
//Other values: Use Timer1 as baud rate generator.
{
AUXR &= ~(1<<4); //Timer stop
AUXR &= ~(1<<3); //Timer2 set As Timer
AUXR |= (1<<2); //Timer2 set as 1T mode
T2H = dat / 256;
T2L = dat % 256;
IE2 &= ~(1<<2); //Disable interrupts
AUXR |= (1<<4); //Timer run enable
}
void UART1_config(u8 brt) //select baud rate:
//2: Use Timer2 as baud rate generator