fupeama wrote: When I try to write 4 bytes (32bits) to non volatile variable, linuxcnc only send 2 bytes. how can i send 4bytes information to my own sserial card? I want to add my own non volatile variables and control it.
What datatype? is datalength correct?
The code looks like it should work:
Code:
case 4: // Now send the data
switch (p->type){
case LBP_SIGNED:
case LBP_NONVOL_SIGNED:
*r->write[0] = (rtapi_u32) p->s32_param;
break;
case LBP_UNSIGNED:
case LBP_NONVOL_UNSIGNED:
*r->write[0] = p->u32_param;
break;
case LBP_FLOAT:
case LBP_NONVOL_FLOAT:
if (g->DataLength == sizeof(float) * 8 ){
float temp = p->float_param;
memcpy(r->write[0], &temp, sizeof(float)); // Data Value
} else if (g->DataLength == sizeof(double) * 8){
double temp = p->float_param;
memcpy(r->write[0], &temp, sizeof(double));
} else {
HM2_ERR("sserial write: LBP_FLOAT of bit-length %i not handled\n", g->DataLength);
p->type= LBP_PAD; // only warn once, then ignore
}
break;
default:
break;
}
switch (g->DataLength){
case 8:
*r->reg_cs_write = WRITE_REM_BYTE_CMD | g->ParmAddr;// Data Address
break;
case 16:
*r->reg_cs_write = WRITE_REM_WORD_CMD | g->ParmAddr;// Data Address
break;
case 32:
*r->reg_cs_write = WRITE_REM_LONG_CMD | g->ParmAddr;// Data Address
break;
case 64:
*r->reg_cs_write = WRITE_REM_DOUBLE_CMD | g->ParmAddr;// Data Address
break;
}
*inst->command_reg_write = 0x1000 | (1 << r->index); // doit command
inst->timer = 200000000;
*inst->state3 = 5;
break;
Seems to match
"REFERENCE INFORMATION
SSLBP
REMOTE WRITE EXAMPLE:
For a remote word write, the sequence of operations is as follows:
1. Issue a STOPALL (0x800) command, wait for COMMAND register clear to verify stop command completion.
2. Issue a setup START command (0xFNN) with bitmask (NN) of channels to start
3. Wait for COMMAND register clear to verify start command completion. (may be many mS)
4. Read data register to verify that all selected channels started (a 1 bit means a fault in the channel that the bit represents)
5. Write the new parameter data to the selected channels Interface0 register (right justified)
6. Write LBP word write command (0x65) in the MSByte ORed with the parameter address to the selected channels CS register. (0x6500PPPP)
7. Issue a DOIT Command
8. Wait for the command register to be clear
9. Check that the data register is clear, any set bits indicate an error . Repeat from step 5 for any additional remote parameter writes
Remote write byte, word, long and double are basically equivalent, the only difference being the LBP command (0x64,0x65,0x66,0x67 respectively) and the size of the data written to the interface register(s)"
The interface registers are 32 bits, so the data should fit.
