Hello.
I use the S2-LP DK_1.2.1 project example "SDK_Chat.c" as the base for two Steval-FKI433V2 PCBs.
The 1st Steval with unchanged SDK_Chat.c program is used as a base device, connected to COM-port,
the 2nd Steval without connection to COM-port should send the data on request of the 1st Steval.
Question: how to switch S2LP-Rx/S2LP-Tx modes correctly without the cycle of waiting the COM-port's chars sequence?
May be there is Echo example for two Steval PCBs?
A target part of the program SDK_Chat.c is placed in infinite loop of main().
The start line 347 (line count for original SDK_Chat.c): tx_data_size=0;
the end line 378: tx_data[tx_data_size] = '\0';
(All this part of original SDK_Chat.c is placed in the end of this question.
The file SDK_Chat.c with my changes is attached, the added lines are signed with '//my' comment).
I try to replace the target part with the next one:
/* infinite loop */ //- line345
isRxCmd=0; //this is added
while (1){
while(!isRxCmd) {
//isRxCmd=1 is added to void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin) after printf(),line 176 to signal Rx
for(uint32_t i=0;i<0x10000;i++); //it doesn't work without this delay (about 0.01s)
//when it was i<0x1000, there were more malfunctions
S2LPCmdStrobeRx();}; //it doesn't work without this in while{}
};
isRxCmd=0;
//then fill the tx_data[] and tx_data_size and use existing part of program to transmit tx_data
Even if the device would work properly with cyclic call of the delay and S2LPCmdStrobeRx(), it seems strange.
Best regards,
bvn123
the part, which should be replaced (bold text):
/* infinite loop */ //- line 345 SDK_Chat.c (original)
while (1){
tx_data_size=0; //line 347
while(__io_getcharNonBlocking(&tx_data[tx_data_size]));
/* reset the data to be sent */
tx_data_size=0;
printf("tx>");
/* RX command */
S2LPCmdStrobeRx();
do
{
while(!__io_getcharNonBlocking(&tx_data[tx_data_size]));
if((char)tx_data[tx_data_size] != '\r' && (char)tx_data[tx_data_size] != '\n')
{
putchar(tx_data[tx_data_size]);
}
else
{
putchar('\n');
putchar('\r');
break;
}
tx_data_size++;
/* if '\r' has been received */
}while(tx_data_size != MAX_PAYLOAD_LENGTH);
/* add the string termination chars */
/*tx_data[tx_data_size] = '\n';
putchar(tx_data[tx_data_size]);*/
tx_data[tx_data_size] = '\0';
