Posted on September 17, 2006 at 01:50Hi All,
My code work well with NRZ/NRZI encoding, but can't work with FM0/MANCH encoding. Can anyone help me? thank you very much!
here is the code :
//=============================================================================
#define CODE_NRZ 0
#define CODE_NRZI 1
#define CODE_FM0 2
#define CODE_MANCH 3
void HDLC_Init(unsigned char tx_code,unsigned int tx_bps,unsigned char rx_code,unsigned int rx_bps)
{
HDLC->GA1 = 0;
HDLC->GA0 = 0;
HDLC->GAM1 = 0;
HDLC->GAM0 = 0;
HDLC->PRES = 0;
HDLC->POSS = 0;
HDLC->TCTL = 0;
HDLC->RCTL = 0;
HDLC->BRR = 0;
HDLC->PRSR = 0;
HDLC->TFBCR = 0;
HDLC->RFBCR = 0;
HDLC->PCR = 0;
HDLC->ISR = 0;
HDLC->IMR = 0;
HDLC->PARH = 0;
HDLC->PAMH = 0;
HDLC->PARL = 0x00AA;
HDLC->PAML = 0x00FF;
GPIO_Config (GPIO1, 0x2000, GPIO_IN_TRI_CMOS);
GPIO_Config (GPIO1, 0x4000, GPIO_IN_TRI_CMOS);
GPIO_Config (GPIO1, 0x8000, GPIO_AF_PP);
if((tx_code==CODE_NRZ)||(tx_code==CODE_NRZI))
{
HDLC->TCTL = (((unsigned short)1)<
HDLC->BRR = ((RCCU_FrequencyValue(RCCU_FCLK)/tx_bps-1) & 0x0FFF);
}
else //((tx_code==CODE_FM0)||(tx_code==CODE_MANCH)
{
HDLC->TCTL = (((unsigned short)1)<
HDLC->BRR = ((RCCU_FrequencyValue(RCCU_FCLK)/tx_bps/2-1) & 0x0FFF);
}
if((rx_code==CODE_NRZ)||(rx_code==CODE_NRZI))
{
HDLC->RCTL = (((unsigned short)1)<
HDLC->PRSR = ((RCCU_FrequencyValue(RCCU_FCLK)/rx_bps-1) & 0x00FF);
}
else //((tx_code==CODE_FM0)||(tx_code==CODE_MANCH))
{
HDLC->RCTL = (((unsigned short)1)<
HDLC->PRSR = ((RCCU_FrequencyValue(RCCU_FCLK)/rx_bps/2-1) & 0x00FF);
}
}
