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kmwkjj
Joined: 12 Dec 2018 Posts: 1 Location: BUSAN/KOREA
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pic18f67k40 uart problem ...help ! |
Posted: Wed Dec 12, 2018 6:05 am |
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MCU: 18f67k40
I want to use 3 UARTs.
UART1 and UART2 have no problems.
UART3 has a problem.
Setting UART3 together with the corresponding source causes a problem in UART2 and UART3.
I want to use both UART1, UART2, and UART3.
UART1, UART2, and UART3 are all connected to the hardware pins.
PLZ Help
Code: | ------------- xx.h ------------------------
#include <18F67K40.h>
#device *=16 adc=10
#use delay(clock = 4000000)
#pin_select U1TX = PIN_C6
#pin_select U1RX = PIN_C7
#pin_select U2TX = PIN_G1
#pin_select U2RX = PIN_G2
#pin_select U3TX = PIN_E0
#pin_select U3RX = PIN_E1
#use rs232 (uart1, baud = 9600, ERRORS, STREAM = g_Stream_SP)
#use rs232 (uart2, baud = 9600, ERRORS, STREAM = g_Stream_Angle)
#use rs232 (uart3, baud = 9600, ERRORS, STREAM = g_Stream_Remote)
#zero_ram
#FUSES XT
#BYTE PORTA = 0x0F89
#BYTE PORTB = 0x0F8A
#BYTE PORTC = 0x0F8B
#BYTE PORTD = 0x0F8C
#BYTE PORTE = 0x0F8D
#BYTE PORTF = 0x0F8E
#BYTE PORTG = 0x0F8F
#BYTE PORTH = 0x0F90
#BYTE TRISAA = 0x0F81
#BYTE TRISAB = 0x0F82
#BYTE TRISAC = 0x0F83
#BYTE TRISAD = 0x0F84
#BYTE TRISAE = 0x0F85
#BYTE TRISAF = 0x0F86
#BYTE TRISAG = 0x0F87
#BYTE TRISAH = 0x0F88 |
Code: |
------------- xx.c ------------------------
#include "xx.h"
#int_rda
void rda_isr()
{
int8 rx_data;
rx_data = getch(g_Stream_SP);
}
#int_rda2
void rda2_isr()
{
int8 rx_data;
rx_data = getch(g_Stream_Angle);
}
#int_rda3
void rda3_isr()
{
int8 rx_data;
rx_data = getch(g_Stream_Remote);
main()
{
enable_interrupts(INT_RDA);
enable_interrupts(INT_RDA2);
enable_interrupts(INT_RDA3);
enable_interrupts(global);
set_tris_a(0b00111000);
set_tris_b(0b00001111);
set_tris_c(0b10000000);
set_tris_d(0b00000000);
set_tris_e(0b11110010);
set_tris_f(0b00000000);
set_tris_g(0b00000100);
set_tris_h(0b00001111);
SETUP_ADC_PORTS( ALL_DIGITAL );
porta = 0x00;
portb = 0x00;
portd = 0x00;
porte = 0x00;
portg = 0x00;
portg = 0x00;
while(1)
{
.....
}
} |
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temtronic
Joined: 01 Jul 2010 Posts: 9174 Location: Greensville,Ontario
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Posted: Wed Dec 12, 2018 6:27 am |
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while I don't use that PIC...some comments..
you need to post your compiler version...
need some more information to narrow down what's happening.
1) does UART #3 work by itself?
2)does UART #1 and #3 work together ?
3) does UART #2 and #3 work together ?
is it ONLY the combination of all 3 UARTs that it fails ?
Jay |
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Ttelmah
Joined: 11 Mar 2010 Posts: 19369
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Posted: Wed Dec 12, 2018 9:21 am |
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Also, what is posted, will cause issues:
1) No closing bracket on the RDA3 handler.
2) No actual way of seeing what has been received.
Data is only being retrieved inside the interrupt handler. If you test this with
a debugger, the processor will be halting inside the handler, so won't be
able to handle the other ports. Result lost data....
There is also a potential issue with the stream names. They really need to
be upper case. Now you don't show whether you use #CASE, but if you
are there will be problems using mixed case stream names. |
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