Workaround: use 8n1 frame and calculate 8th (MSB) bit which will be parity bit in 7e1 - it works but if problem I mentioned above is bug in the firmware it should be fixed.
u8 addparity(u8 data) {
u8 parity = 0x00;
u8 tmp = data;
tmp &= 0x7F;
while (tmp) {
parity = ~parity;
tmp = tmp & (tmp - 1);
}
parity &= 0x80;
return (data & 0x7F) | parity;
}Still I need fix this problem due to program speed reason.