custom board for smart serial interface?

Hi Rene,

Thank you for your replay for my problem. I really need your help. My fault byte to respond for request of master is txbuf[0] = 0x00 in the process data step. Is it correct? Are there three files consist sserial.h, sserial.c and gentable.c that are enough for Smart Serial run?
If you have much free time, you can present for me a example so that i can understand timeout of smart serial to request and respond.
"//wait with timeout until rest of process data is received
do {
uint32_t t2 = hal_get_systick_value();
if(t1 < t2) {
t1 += hal_get_systick_reload();
}
wait_ticks = t1 - t2;
//next received packet will be written to bufferpos
bufferpos = sizeof(rxbuf) - DMA_GetCurrDataCounter(DMA2_Stream5);
//how many packets we have the the rx buffer for processing
available = (bufferpos - rxpos + sizeof(rxbuf)) % sizeof(rxbuf);
} while(available < discovery.output + 2 && wait_ticks <= max_waste_ticks);
"
I really appreciate your help. Once again, Thank you so much.

Hi everyone,

Currently, My board was fixed, It's complete connection. I can read/write I/O. But when i want to config more than I/O then the error appear again. Example,If I have s struct " sserial_process_data_in "which have a sizeof 16 byte, The error " remote error appear. If you know how to fix the error, can you help me? Please!
typedef struct {
float pos_fb1;
float pos_fb2;
float pos_fb3;
float pos_fb4;
uint32_t in_0 : 1;
uint32_t in_1 : 1;
uint32_t in_2 : 1;
uint32_t in_3 : 1;
uint32_t padding : 4;
} sserial_in_process_data_t; //size:17 bytes
_Static_assert(sizeof(sserial_in_process_data_t) == 17, "sserial_in_process_data_t size error!");
//global name:scale addr:0xbb size:32 dir:0x80
#define scale_address 187

Thank you so much!

SSLBP (the FPGA firmware the interfaces to smart serial devices) is currently limited to 12 bytes of process data in each direction
(you can kind of guess this from the fact that is has only 3x 32 bit process data interface registers to the host)

the gentable doesnt run on the mcu, you just copy and paste its output to the code.
you also need crc8.c/.h

Hi everyone,

Thank you so much for your recommend. I really appreciate it. I understand the problem that I meet.
But Currently, I want to read/write the channel analogs (x12bits), It's need only 2 byte to met. so I config " #define DATA_TYPE_UINT16_T 0x12 " on sserial.h and " case DATA_TYPE_UINT16_T:
if(pd->data_size != 16) {
printf("warning: unsupported uint16_t size!");
}
printf("uint16_t %s;\n", name);
break; " on the gentable.c. But when I run to connect with Linuxcnc the message to appear that is " Unsupported output datatype 18 (name pos_cmd) "
If you know why to have the message. you can explain it to me. Please! Once again, thank you so much.

Thats not now it works.
you specify a unsigned integer, and then give it 16 bits.
no need for a new datatype.
the struct should then contain a bitfield.

Hi All,

Do you have any ideas for implementing out DAC with sserial like mesa card.
Thanks.

you specify a float, or int, and output the value to a dac/pwm.