/*
* ISR context
* uart_rx_cb() will be called when UART rx interrupt assert,
* then we should featch data from HW FIFO quickly.
* fucntion: fetch data from HW FIFO to rx ring buffer
* we should use uart_get_byte(&ch) to fetch byte from HW FIFO as quickly as possible
*/
void uart_rx_cb(void)
{
uint16 roomleft = 0;
PKT_FIFO *infor;
PKT_FIFO *temp_info;
uint8 ch = 0;
PKT_DESC *rx_desc = &(UARTPort.Rx_desc);
BUFFER_INFO *rx_ring = &(UARTPort.Rx_Buffer);
static uint8 ATMatchNum = 0;
static uint8 IWMatchNum = 0;
/*
* MCU only forward uart rx data to air
* here,copy to rx ring and return
*/
#if (UARTRX_TO_AIR_LEVEL == 2)
if (iot_uart_rx_mode == UARTRX_PUREDATA_MODE) {
while (uart_get_byte(&ch)) {
Buf_Push(rx_ring,ch);
}
return;
}
#endif
/*
* MCU should collect data to be packet
*/
//normal case
Buf_GetRoomLeft(rx_ring,roomleft);
while (uart_get_byte(&ch)) {
//new receive begin,detect packet header at first
switch (rx_desc->cur_type) {
case PKT_UNKNOWN: {
/**************** detect packet type ***************/
//support more ATcmd prefix analysis
/*case 1:AT#*/
if (ATCmdPrefixAT[ATMatchNum] == ch) {
ATMatchNum++;
} else {
ATMatchNum = 0;
}
/*case 2:iwpriv ra0*/
if (ATCmdPrefixIW[IWMatchNum] == ch) {
IWMatchNum++;
} else {
IWMatchNum = 0;
}
if ((ATMatchNum == sizeof(ATCmdPrefixAT)-1) || //match case 1: AT#
(IWMatchNum == sizeof(ATCmdPrefixIW)-1)) { //match case 2:iwpriv ra0
rx_desc->cur_num = rx_desc->pkt_num;
infor = &(rx_desc->infor[rx_desc->cur_num]);
infor->pkt_len = 0;
if (ATMatchNum == sizeof(ATCmdPrefixAT)-1) {
rx_desc->cur_type = PKT_ATCMD; //match case 1: AT#
} else if (IWMatchNum == sizeof(ATCmdPrefixIW)-1) {
rx_desc->cur_type = PKT_IWCMD; //match case 2:iwpriv ra0
}
ATMatchNum = 0;
IWMatchNum = 0;
continue;
}
}
break;
case PKT_ATCMD:
case PKT_IWCMD: {
infor = &(rx_desc->infor[rx_desc->cur_num]);
/*received one complete packet*/
if (ch == '\n' || ch == '\r') {
//if task has consumed some packets
if (rx_desc->cur_num != rx_desc->pkt_num) {
temp_info = infor;
infor = &(rx_desc->infor[rx_desc->pkt_num]);
infor->pkt_len = temp_info->pkt_len;
temp_info->pkt_len = 0;
temp_info->pkt_type = PKT_UNKNOWN;
}
infor->pkt_type = rx_desc->cur_type; // PKT_ATCMD / PKT_IWCMD;
rx_desc->pkt_num++;
rx_desc->cur_type = PKT_UNKNOWN;
} else {
/*continue to receiving packet */
Buf_Push(rx_ring,ch);
roomleft--;
infor->pkt_len++;
}
/*
* if overflow,we discard the current packet
* example1:packet length > ring size
* example2:rx ring buff can no be freed by task as quickly as rx interrupt coming
*/
if ((!roomleft) || (rx_desc->pkt_num >= NUM_DESCS)) {
//rollback
Buff_RollBack(rx_ring,infor->pkt_len);
roomleft += infor->pkt_len;
infor->pkt_type = PKT_UNKNOWN;
infor->pkt_len = 0;
rx_desc->cur_type = PKT_UNKNOWN;
if (rx_desc->pkt_num >= NUM_DESCS) {
rx_desc->pkt_num--;
}
}
}
break;
default:
break;
}
}
}
/*********************************************************************************************************
** Function name: UartProcessMsg()
** Descriptions: 处理串口消息
** input parameters: 无
** Output parameters:: 无
** Returned value: 无
** Created by:
** Created Date: 2014.10.03
**--------------------------------------------------------------------------------------------------------
** Modified by:
** Modified date: 2014.10.03
**--------------------------------------------------------------------------------------------------------
*********************************************************************************************************/
void UartProcessMsg(u8 ch)
{
u16 roomleft = 0;
PKT_FIFO *infor;
PKT_FIFO *temp_info;
PKT_DESC *rx_desc = &(UART1Port.Rx_desc);
BUFFER_INFO *rx_ring = &(UART1Port.Rx_Buffer);
static u16 AMHeadLen = sizeof(RCTRL_STRU_MSGHEAD);
static u16 AMBodyLen =0;
static u8 PDMatchNum = 0;
static u8 PrintMatchNum = 0;
Buf_GetRoomLeft(rx_ring,roomleft);
switch (rx_desc->cur_type)
{
case PKT_UNKNOWN:
{
/**************** detect packet type ***************/
if (PureDataPrefix[PDMatchNum] == ch)
{
PDMatchNum++;
}
else
{
PDMatchNum = 0;
}
if (PrintCmdPrefix[PrintMatchNum] == ch)
{
PrintMatchNum++;
}
else
{
PrintMatchNum = 0;
}
if ((PDMatchNum == sizeof(PureDataPrefix)-1) ||
(PrintMatchNum == sizeof(PrintCmdPrefix)-1)) //match case 3:arm data
{
rx_desc->cur_num = rx_desc->pkt_num;
infor = &(rx_desc->infor[rx_desc->cur_num]);
infor->pkt_len = 0;
if (PrintMatchNum == sizeof(PrintCmdPrefix)-1)
{
rx_desc->cur_type = PKT_PRINTCMD; //match case 2:iwpriv ra0
}
else if (PDMatchNum == sizeof(PureDataPrefix)-1)
{
u8 i= 0;
rx_desc->cur_type = PKT_PUREDATA; //match case 2:iwpriv ra0
if(roomleft<AMHeadLen)
{
rx_desc->cur_type= PKT_UNKNOWN;
}
else
{
for(i = 0;i < sizeof(PureDataPrefix)-1;i++)
{
Buf_Push(rx_ring,PureDataPrefix[i]);
}
roomleft= roomleft-sizeof(PureDataPrefix)+1;
infor = &(rx_desc->infor[rx_desc->cur_num]);
infor->pkt_len = infor->pkt_len + i;
}
}
PrintMatchNum = 0;
PDMatchNum = 0;
}
}
break;
case PKT_PRINTCMD:
{
/*
* received one complete packet
*/
if(ch == '\0'||ch == '\n' || ch == '\r')
{
rx_desc->cur_type = PKT_UNKNOWN;
return;
}
}
break;
case PKT_PUREDATA:
{
infor = &(rx_desc->infor[rx_desc->cur_num]);
Buf_Push(rx_ring,ch);
roomleft--;
infor->pkt_len++;
if(infor->pkt_len==AC_PAYLOADLENOFFSET)
{
AMBodyLen = ch;
}
else if(infor->pkt_len==(AC_PAYLOADLENOFFSET +1))
{
AMBodyLen = (AMBodyLen<<8) + ch;
}
/*
* if overflow,we discard the current packet
* example1:packet length > ring size
* example2:rx ring buff can no be freed by task as quickly as rx interrupt coming
*/
if ((!roomleft) || (rx_desc->pkt_num >= NUM_DESCS))
{
//rollback
Buff_RollBack(rx_ring,infor->pkt_len);
roomleft += infor->pkt_len;
infor->pkt_type = PKT_UNKNOWN;
infor->pkt_len = 0;
rx_desc->cur_type = PKT_UNKNOWN;
if (rx_desc->pkt_num >= NUM_DESCS)
{
rx_desc->pkt_num--;
}
}
/*
* received one complete packet
*/
if(AMHeadLen+AMBodyLen==infor->pkt_len)
{
//if task has consumed some packets
if (rx_desc->cur_num != rx_desc->pkt_num)
{
temp_info = infor;
infor = &(rx_desc->infor[rx_desc->pkt_num]);
infor->pkt_len = temp_info->pkt_len;
temp_info->pkt_len = 0;
temp_info->pkt_type = PKT_UNKNOWN;
}
infor->pkt_type = rx_desc->cur_type; // PKT_ATCMD / PKT_IWCMD;
rx_desc->pkt_num++;
rx_desc->cur_type = PKT_UNKNOWN;
AMBodyLen =0;
return;
}
}
break;
default:
break;
}
}
