marcus chiou
mbed library sources
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Diff: targets/hal/TARGET_Atmel/TARGET_SAM21/pinmap_function.c
- Revision:
- 613:bc40b8d2aec4
- Parent:
- 612:fba1c7dc54c0
- Child:
- 614:9d86c2ae5de0
--- a/targets/hal/TARGET_Atmel/TARGET_SAM21/pinmap_function.c Tue Aug 18 15:00:09 2015 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,221 +0,0 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-#include <stddef.h>
-#include "us_ticker_api.h"
-#include "cmsis.h"
-#include "mbed_assert.h"
-#include "ins_gclk.h"
-#include "compiler.h"
-#include "system.h"
-
-#include "pinmap_function.h"
-
-static uint32_t pinmap_merge_pins(uint32_t a, uint32_t b)
-{
- // both are the same (inc both NC)
- if (a == b)
- return a;
-
- // one (or both) is not connected
- if (a == (uint32_t)NC)
- return b;
- if (b == (uint32_t)NC)
- return a;
-
- return (uint32_t)NC;
-}
-
-/** Find the common SERCOM shared by two pins
- *
- * Finds the common SERCOM index of two input pins.
- * If swapping the input argument gives different result, it means, two SERCOMs share both pins
- * @param[in] pin1 First pin
- * @param[in] pin2 Second pin
- * @return SERCOM index if found, else, NC
- */
-uint32_t pinmap_merge_sercom(PinName pin1, PinName pin2)
-{
- int i, j;
- uint32_t pin1_sercom[2];
- uint32_t pin2_sercom[2];
- uint32_t sercom_index[4];
-
- uint32_t pin_com = NC;
- uint32_t pin_alt = NC;
- uint32_t count_com = 0;
- uint32_t count_alt = 0;
-
- /* Adding a condition check just in case we need a different result when swapping arguments */
- if (pin1 >= pin2) {
- pin1_sercom[0] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PAD);
- pin1_sercom[1] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PADEx);
- } else {
- pin1_sercom[0] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PADEx);
- pin1_sercom[1] = pinmap_find_peripheral(pin1, PinMap_SERCOM_PAD);
- }
-
- pin2_sercom[0] = pinmap_find_peripheral(pin2, PinMap_SERCOM_PAD);
- pin2_sercom[1] = pinmap_find_peripheral(pin2, PinMap_SERCOM_PADEx);
-
- for (i=0; i<2; i++) {
- if (pin1_sercom[i] != NC) {
- pin1_sercom[i] &= 0x0F;
- }
- for (j=0; j<2; j++) {
- if (pin2_sercom[i] != NC) {
- pin2_sercom[i] &= 0x0F;
- }
- sercom_index[(i*2) + j] = pinmap_merge_pins(pin1_sercom[i], pin2_sercom[j]);
- }
- }
-
- for (i=0; i<4; i++) {
- if (sercom_index[i] != NC) {
- if (pin_com == NC) {
- pin_com = sercom_index[i];
- count_com++;
- } else if (pin_com == sercom_index[i]) {
- count_com++;
- } else if (pin_alt == NC) {
- pin_alt = sercom_index[i];
- count_alt++;
- } else if (pin_alt == sercom_index[i]) {
- count_alt++;
- } else {}
- }
- }
- return ((count_com >= count_alt) ? pin_com : pin_alt);
-}
-
-/** Find the common SERCOM shared by four pins
- *
- * Finds the common SERCOM index shared by four input pins.
- * If reversing the input argument order gives different result, it means, two SERCOMs share the pins
- * @param[in] pin1 First pin
- * @param[in] pin2 Second pin
- * @param[in] pin3 Third pin
- * @param[in] pin4 Fourth pin
- * @return SERCOM index if found, else, NC
- */
-uint32_t pinmap_find_sercom(PinName pin1, PinName pin2, PinName pin3, PinName pin4)
-{
- int i;
- uint32_t sercom_index[4];
- uint32_t pin_com = NC;
- uint32_t pin_alt = NC;
- uint32_t count_com = 0;
- uint32_t count_alt = 0;
-
- sercom_index[0] = pinmap_merge_sercom(pin1, pin2);
- sercom_index[1] = pinmap_merge_sercom(pin3, pin3);
- sercom_index[2] = pinmap_merge_sercom(pin1, pin3);
- sercom_index[3] = pinmap_merge_sercom(pin2, pin4);
-
-
- for (i=0; i<4; i++) {
- if (sercom_index[i] != NC) {
- if (pin_com == NC) {
- pin_com = sercom_index[i];
- count_com++;
- } else if (pin_com == sercom_index[i]) {
- count_com++;
- } else if (pin_alt == NC) {
- pin_alt = sercom_index[i];
- count_alt++;
- } else if (pin_alt == sercom_index[i]) {
- count_alt++;
- } else {}
- }
- }
- return ((count_com >= count_alt) ? pin_com : pin_alt);
-}
-
-/** Find the MUX function of input pin specific to given SERCOM index
- *
- * @param[in] pin Pin whose function is to be found out
- * @param[in] sercom_index SERCOM index
- * @return MUX function if found, else, NC
- */
-uint32_t pinmap_function_sercom(PinName pin, uint32_t sercom_index)
-{
- uint32_t func = NC;
- uint32_t index;
- sercom_index &= 0x0F;
-
- if ((pin == NC) || (sercom_index >= SERCOM_INST_NUM)) {
- return NC;
- }
- index = pinmap_peripheral(pin, PinMap_SERCOM_PAD);
- if ((index & 0x0F) == sercom_index) {
- func = pinmap_function(pin, PinMap_SERCOM_PAD);
- return func;
- }
- index = pinmap_peripheral(pin, PinMap_SERCOM_PADEx);
- if ((index & 0x0F) == sercom_index) {
- func = pinmap_function(pin, PinMap_SERCOM_PADEx);
- return func;
- }
- return NC;
-}
-
-/** Find the MUX pad of input pin specific to given SERCOM index
- *
- * @param[in] pin Pin whose function is to be found out
- * @param[in] sercom_index SERCOM index
- * @return MUX pad if found, else, NC
- */
-uint32_t pinmap_pad_sercom(PinName pin, uint32_t sercom_index)
-{
- uint32_t index;
- sercom_index &= 0x0F;
-
- if ((pin == NC) || (sercom_index >= SERCOM_INST_NUM)) {
- return NC;
- }
- index = pinmap_peripheral(pin, PinMap_SERCOM_PAD);
- if ((index & 0x0F) == sercom_index) {
- return ((index >> 4) & 0x0F);
- }
- index = pinmap_peripheral(pin, PinMap_SERCOM_PADEx);
- if ((index & 0x0F) == sercom_index) {
- return ((index >> 4) & 0x0F);
- }
- return NC;
-}
-
-/** Find the MUX function of input pin specific to given SERCOM index
- *
- * @param[in] pin unused
- * @param[in] sercom_index SERCOM index
- * @return base address to SERCOM if found, else NC
- */
-uint32_t pinmap_peripheral_sercom(PinName pin, uint32_t sercom_index)
-{
- uint32_t sercom_address[6] = {
- 0x42000800UL, // Base address of SERCOM0
- 0x42000C00UL, // Base address of SERCOM1
- 0x42001000UL, // Base address of SERCOM2
- 0x42001400UL, // Base address of SERCOM3
- 0x42001800UL, // Base address of SERCOM4
- 0x42001C00UL // Base address of SERCOM5
- };
- uint32_t index = sercom_index & 0x0F;
-
- if (index >= SERCOM_INST_NUM) {
- return NC;
- }
- return sercom_address[(sercom_index&0x0F)];
-}
\ No newline at end of file