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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,118 @@ | ||
| /* | ||
| Copyright (c) 2015 Arduino LLC. All right reserved. | ||
| This library is free software; you can redistribute it and/or | ||
| modify it under the terms of the GNU Lesser General Public | ||
| License as published by the Free Software Foundation; either | ||
| version 2.1 of the License, or (at your option) any later version. | ||
| This library is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | ||
| See the GNU Lesser General Public License for more details. | ||
| You should have received a copy of the GNU Lesser General Public | ||
| License along with this library; if not, write to the Free Software | ||
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
| */ | ||
|
|
||
| #include "WVariant.h" | ||
| #include "wiring_private.h" | ||
|
|
||
| int pinPeripheral( uint32_t ulPin, EPioType ulPeripheral ) | ||
| { | ||
| // Handle the case the pin isn't usable as PIO | ||
| if ( g_APinDescription[ulPin].ulPinType == PIO_NOT_A_PIN ) | ||
| { | ||
| return -1 ; | ||
| } | ||
|
|
||
| switch ( ulPeripheral ) | ||
| { | ||
| case PIO_DIGITAL: | ||
| case PIO_INPUT: | ||
| case PIO_INPUT_PULLUP: | ||
| case PIO_OUTPUT: | ||
| // Disable peripheral muxing, done in pinMode | ||
| // PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].bit.PMUXEN = 0 ; | ||
|
|
||
| // Configure pin mode, if requested | ||
| if ( ulPeripheral == PIO_INPUT ) | ||
| { | ||
| pinMode( ulPin, INPUT ) ; | ||
| } | ||
| else | ||
| { | ||
| if ( ulPeripheral == PIO_INPUT_PULLUP ) | ||
| { | ||
| pinMode( ulPin, INPUT_PULLUP ) ; | ||
| } | ||
| else | ||
| { | ||
| if ( ulPeripheral == PIO_OUTPUT ) | ||
| { | ||
| pinMode( ulPin, OUTPUT ) ; | ||
| } | ||
| else | ||
| { | ||
| // PIO_DIGITAL, do we have to do something as all cases are covered? | ||
| } | ||
| } | ||
| } | ||
| break ; | ||
|
|
||
| case PIO_ANALOG: | ||
| case PIO_SERCOM: | ||
| case PIO_SERCOM_ALT: | ||
| case PIO_TIMER: | ||
| case PIO_TIMER_ALT: | ||
| case PIO_EXTINT: | ||
| case PIO_COM: | ||
| case PIO_AC_CLK: | ||
| #if 0 | ||
| // Is the pio pin in the lower 16 ones? | ||
| // The WRCONFIG register allows update of only 16 pin max out of 32 | ||
| if ( g_APinDescription[ulPin].ulPin < 16 ) | ||
| { | ||
| PORT->Group[g_APinDescription[ulPin].ulPort].WRCONFIG.reg = PORT_WRCONFIG_WRPMUX | PORT_WRCONFIG_PMUXEN | PORT_WRCONFIG_PMUX( ulPeripheral ) | | ||
| PORT_WRCONFIG_WRPINCFG | | ||
| PORT_WRCONFIG_PINMASK( g_APinDescription[ulPin].ulPin ) ; | ||
| } | ||
| else | ||
| { | ||
| PORT->Group[g_APinDescription[ulPin].ulPort].WRCONFIG.reg = PORT_WRCONFIG_HWSEL | | ||
| PORT_WRCONFIG_WRPMUX | PORT_WRCONFIG_PMUXEN | PORT_WRCONFIG_PMUX( ulPeripheral ) | | ||
| PORT_WRCONFIG_WRPINCFG | | ||
| PORT_WRCONFIG_PINMASK( g_APinDescription[ulPin].ulPin - 16 ) ; | ||
| } | ||
| #else | ||
| if ( g_APinDescription[ulPin].ulPin & 1 ) // is pin odd? | ||
| { | ||
| uint32_t temp ; | ||
|
|
||
| // Get whole current setup for both odd and even pins and remove odd one | ||
| temp = (PORT->Group[g_APinDescription[ulPin].ulPort].PMUX[g_APinDescription[ulPin].ulPin >> 1].reg) & PORT_PMUX_PMUXE( 0xF ) ; | ||
| // Set new muxing | ||
| PORT->Group[g_APinDescription[ulPin].ulPort].PMUX[g_APinDescription[ulPin].ulPin >> 1].reg = temp|PORT_PMUX_PMUXO( ulPeripheral ) ; | ||
| // Enable port mux | ||
| PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].reg |= PORT_PINCFG_PMUXEN ; | ||
| } | ||
| else // even pin | ||
| { | ||
| uint32_t temp ; | ||
|
|
||
| temp = (PORT->Group[g_APinDescription[ulPin].ulPort].PMUX[g_APinDescription[ulPin].ulPin >> 1].reg) & PORT_PMUX_PMUXO( 0xF ) ; | ||
| PORT->Group[g_APinDescription[ulPin].ulPort].PMUX[g_APinDescription[ulPin].ulPin >> 1].reg = temp|PORT_PMUX_PMUXE( ulPeripheral ) ; | ||
| PORT->Group[g_APinDescription[ulPin].ulPort].PINCFG[g_APinDescription[ulPin].ulPin].reg |= PORT_PINCFG_PMUXEN ; // Enable port mux | ||
| } | ||
| #endif | ||
| break ; | ||
|
|
||
| case PIO_NOT_A_PIN: | ||
| return -1l ; | ||
| break ; | ||
| } | ||
|
|
||
| return 0l ; | ||
| } | ||
|
|
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