16F628a to 16F873a

[Bruce]

Have you disabled the A/D module to use PORTA pins as digital?

ADCON1 = 7

[mpardinho]

yes, ADCON1 = 7

if i test simple code serin, serout work 100%,
with my code i receive wrong caracters,
in 16f628 work perfect

[mister_e]

mmm, what happen if you do a simple test and use DEBUG instead of SEROUT. As you're using a 4MHZ clock, SEROUT may work or not.

to me the built-in USART is always a better choice so far. and @4mhz, you'll end up with a nice error % -> 0.16%

DEFINE HSER_RCSTA 90h ' Enable serial port & continuous receive
DEFINE HSER_TXSTA 24h ' Enable transmit, BRGH = 1
DEFINE HSER_SPBRG 25  ' 9600 Baud @ 4MHz, 0.16%
DEFINE HSER_CLROERR 1 ' Clear overflow automatically

The main problem is that you'll have to change a little bit your actual setup... but...

EDIT:

Data_Entrada      var   PORTC.1     '1
Data_Saida        var   PORTC.1     '1

Should they be on a different pin?

[mpardinho]

my code is for TRW-24G
Data_Entrada and Data_Saida is the same pin because TRW-24G use data and clock to send data


shiftout Data_Entrada, Clock, MSBFIRST, [Dados_Enviados[i]\8]
shiftout Data_Saida, Clock, MSBFIRST, [Dados_Enviados[i]\8]