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hmmpic
Joined: 09 Mar 2010
Posts: 314
Location: Denmark
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| 26K22 pullup on E3 -> Compiler error 5.016 |
 Posted: Thu Dec 12, 2013 7:00 am |
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Hi
Compiler 5.016
Is this looking right?
I dont understand the asm. code, register F86.6? is not existing in the chip 26K22? And the RBPU = 0 is High therefore no pullup at all.
Is there error in the compile??
//Only for test, therefore no sw or other thing!
| Code: | #include <18F26K22.h>
void main(void) {
port_b_pullups(0x00);//no pull up on port b
port_e_pullups(0x08);//pullup on port e pin_e3!!! It can only be input! If no pullup it will float:-((((
} |
List code:
| Code: | 0001E: CLRF WPUB
00020: BSF INTCON2.RBPU
.................... port_e_pullups(0x08);//pullup on port e pin_e3!!! It can only be input! If no pullup it will float:-((((
00022: BCF F86.6
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This is from the Datasheet:
| Code: | 10.6.3 RE3 WEAK PULL-UP
The port RE3 pin has an individually controlled weak
internal pull-up. When set, the WPUE3 (TRISE<7>) bit
enables the RE3 pin pull-up. The RBPU bit of the
INTCON2 register controls pull-ups on both PORTB
and PORTE. When RBPU = 0, the weak pull-ups
become active on all pins which have the WPUE3 or
WPUBx bits set. When set, the RBPU bit disables all
weak pull-ups. The pull-ups are disabled on a Poweron
Reset. When the RE3 port pin is configured as
MCLR, (CONFIG3H<7>, MCLRE=1 and
CONFIG4L<2>, LVP=0), or configured for Low Voltage
Programming, (MCLRE=x and LVP=1), the pull-up is
always enabled and the WPUE3 bit has no effect
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Last edited by hmmpic on Thu Dec 12, 2013 9:45 am; edited 1 time in total |
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Ttelmah
Joined: 11 Mar 2010
Posts: 19360
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| Posted: Thu Dec 12, 2013 9:14 am |
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Yes. Report it to CCS, and just bodge round temporarily with:
| Code: |
#include <18F26K22.h>
#BIT RBPU=getenv("BIT:RBPU")
void main(void) {
port_b_pullups(0x00);//no pull up on port b
port_e_pullups(0x08);//pullup on port e pin_e3!!! It can only be input! If no pullup it will float:-((((
RBPU=0;
}
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On most chips, RBPU, only controls the port B pullups (hence the 'B' in it's name). So the compiler when it sees all the pull up bits on port B set to '0', turns this bit off. On this chip it also controls the port E pullups, so needs to be on if any bit is set here, but the compiler hasn't got this sorted.
Hurrah!. A really nice sized test program. 
Best Wishes |
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hmmpic
Joined: 09 Mar 2010
Posts: 314
Location: Denmark
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| Posted: Thu Dec 12, 2013 9:47 am |
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Hi
Just sent a support mail to CCS.
Thanks for testing, too:-) |
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