SD1 can send data to serial debugging assistant，but cant received the data send from serial debugging assistant. Here is the code i am running:
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static WORKING_AREA(waCANThread,4096);
static msg_t CANThread(void *arg)
{
(void)arg;
// EventListener el;
BaseChannel *seri=(BaseChannel *)&SD1;//
static uint8_t smsg[20]={1},*rmsg;
CANRxFrame rxmsg;
uint8_t i=0;
unsigned char txr[8]={0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77};//
while(1)
{
msg_t result = canReceive(&CAND1, CAN_ANY_MAILBOX, &rxmsg, TIME_IMMEDIATE);
if(result==RDY_OK)
{
if(rxmsg.EID==0x04000001)
{
palTogglePad(GPIOB,9);//
}
}
// palTogglePad(GPIOB, GPIOB_LED_A);
chSysLock();
/* The following function must be called from within a system lock zone. */
size_t bytesAvailable = chnBytesAvailable(seri);
chSysUnlock();
smsg[0]=0;smsg[1]=1;smsg[2]=2;
chnWrite(seri, smsg, 3);
chThdSleepMilliseconds(1000);
if(bytesAvailable)//
{
smsg[0]=bytesAvailable;smsg[1]=1;smsg[2]=2;
chnWrite(seri, smsg, 3);//
palTogglePad(GPIOB,9);
chnRead(seri, rmsg, bytesAvailable);
memcpy(txr,rmsg,bytesAvailable);
palTogglePad(GPIOB,9);
//EID,DATA,LENGTH
CANTransmit(0x04000001,txr,bytesAvailable);//send
chThdSleepMilliseconds(1000);
bytesAvailable=0;
}
}
return 0;
}
when I send data to SD1 from serial debugging assistant, why the bytesAvailable always be zero?
thank you very much for your reply.
