2nd hardware UART

[richard]

Thanks for any tips,

my tip
it works just fine if you do it properly

[tumbleweed]

You might want to post what you've tried so we can give you some 'tips'

[rocket_troy]

You might want to post what you've tried so we can give you some 'tips'

OSCFRQ = %1000 '64Mhz

Define OSC 64

' Set receive register to receiver enabled
' Set transmit register to transmitter enabled
DEFINE HSER_RXREG PORTC
DEFINE HSER_RXBIT 4
DEFINE HSER_TXREG PORTC
DEFINE HSER_TXBIT 5
DEFINE HSER_BAUD 9600

' Set receive register to receiver enabled
' Set transmit register to transmitter enabled
'DEFINE HSER2_RXREG PORTB
'DEFINE HSER2_RXBIT 3
'DEFINE HSER2_TXREG PORTB
'DEFINE HSER2_TXBIT 0
'DEFINE HSER2_BAUD 9600

'This works
hSerout ["Test",13,10]

'This doesn't
hSerout2 ["Test",13,10]

[rocket_troy]

Apologies, here is the actual code:

OSCFRQ = %1000 '64Mhz

Define OSC 64

PRECISION  CON 8 SYSTEM  '8 byte = 64 bit precision
INCLUDE "N-Bit_Math.pbp"

DEFINE HSER2_RXREG PORTB
DEFINE HSER2_RXBIT 3
DEFINE HSER2_TXREG PORTB
DEFINE HSER2_TXBIT 0
DEFINE HSER2_BAUD 9600

DEFINE HSER_RXREG PORTC
DEFINE HSER_RXBIT 4
DEFINE HSER_TXREG PORTC
DEFINE HSER_TXBIT 5
DEFINE HSER_BAUD 9600
 
ANSELA = %00000000 'Everything Digital
ANSELB = %00000000 'Everything Else Digital
ANSELC = %00000000 'Everything Else Digital

TRISB.0 = 0 
TRISB.3 = 1 
TRISC.4 = 1 
TRISC.5 = 0 

'works
hSerout ["Test",13,10]

'doesn't work
hSerout2 ["Test",13,10]

[robertg]

I'm far from an expert in this space. And haven't used the second USART port on a PIC
But maybe PMD5 register for UART2 isn't being set correctly by picbasic??

bit 5 U2MD: Disable UART2 bit
1 = UART2 module disabled
0 = UART2 module enabled
bit 4 U1MD: Disable UART1 bit
1 = UART1 module disabled
0 = UART1 module enabled

[richard]

I'm far from an expert in this space. And haven't used the second USART port on a PIC
But maybe PMD5 register for UART2 isn't being set correctly by picbasic??

extremely unlikely

note power on defaults for PDM5


did you try setting uart regs like mcc suggests ?
note uart registers

[rocket_troy]

Regarding setting the regs directly: this is what I've tried (note this is set to 115200 baud as that was the original objective)

OSCFRQ = %1000 '64Mhz

Define OSC 64

PRECISION  CON 8 SYSTEM  '8 byte = 64 bit precision
INCLUDE "N-Bit_Math.pbp"

'Use for hardware serial comms to SD card module
'******************************************************************************
'Configure UART Control Register 0
U2CON0.7 = 1 'BRGS = 1 (high speed baud generator)
U2CON0.6 = 0 'ABDEN = 0 Auto-baud Detect Disabled 
U2CON0.5 = 1 'TXEN: Transmit Enabled
U2CON0.4 = 1 'RXEN: Receive Disabled
U2CON0.3 = 0 '0000 = Asynchronous 8-bit UART mode
U2CON0.2 = 0 '0000 = Asynchronous 8-bit UART mode
U2CON0.1 = 0 '0000 = Asynchronous 8-bit UART mode
U2CON0.0 = 0 '0000 = Asynchronous 8-bit UART mode

U2CON1.7 = 0 'Turn Serial port 2 off for baud setting
 
U2BRGL = 138  'Baud Divisor low byte
U2BRGH = 0    'Baud Divisor high byte

U2RXPPS = %1011 'Assign UART RX pin to RB3
RB0PPS = %010110  'Assign UART2 TX pin to RB0
 
U2CON1.7 = 1 'Turn Serial port 2 on
'******************************************************************************
 
'Configure AN2 as Analog Inputs (PortA2)
ANSELB = %00000000 'Everything Digital

TRISB.0 = 0 'SD_Card_TX Hardware UART
TRISB.3 = 1 'SD_Card_RX Hardware UART

hSerout2 ["Test",13,10]

That doesn't provide any joy either.

[richard]

you don't appear to have set the portb pins used to digital [anselb =$f6]

or not

mcc sets the involved registers like this to match your settings

TRISB = 0xFE;
ANSELB = 0xF6;
U2RXPPS = 0x0B; //RB3->UART2:RX2;
RB0PPS = 0x16; //RB0->UART2:TX2;
U2P1L = 0x00;
U2P1H = 0x00;
U2P2L = 0x00;
U2P2H = 0x00;
U2P3L = 0x00;
U2P3H = 0x00;
U2CON0 = 0xB0;
U2CON1 = 0x80;
U2CON2 = 0x00;
U2BRGL = 0x82;
U2BRGH = 0x06;
U2FIFO = 0x00;
U2UIR = 0x00;
U2ERRIR = 0x00;
U2ERRIE = 0x00;

[rocket_troy]

I'm guessing this is a reply to my 1st code post which I inadvertently cut the TRIS settings in my (hastily) attempt for reader friendly pruning, but I can assure you every port was set to digital all the time. What's more, the 2nd UART was originally configured to the same pins as the 1st. When my head was too sore from banging against that wall, I switched the 1st UART to those pins and voila, they worked.

Troy

you don't appear to have set the portb pins used to digital [anselb =$f6]

or not

mcc sets the involved registers like this to match your settings

TRISB = 0xFE;
ANSELB = 0xF6;
U2RXPPS = 0x0B; //RB3->UART2:RX2;
RB0PPS = 0x16; //RB0->UART2:TX2;
U2P1L = 0x00;
U2P1H = 0x00;
U2P2L = 0x00;
U2P2H = 0x00;
U2P3L = 0x00;
U2P3H = 0x00;
U2CON0 = 0xB0;
U2CON1 = 0x80;
U2CON2 = 0x00;
U2BRGL = 0x82;
U2BRGH = 0x06;
U2FIFO = 0x00;
U2UIR = 0x00;
U2ERRIR = 0x00;
U2ERRIE = 0x00;