circuitpython/ports/atmel-samd/common-hal/busio/__init__.c

64 lines
2.3 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Scott Shawcroft
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "samd/sercom.h"
static bool never_reset_sercoms[SERCOM_INST_NUM];
void never_reset_sercom(Sercom *sercom) {
// Reset all SERCOMs except the ones being used by on-board devices.
Sercom *sercom_instances[SERCOM_INST_NUM] = SERCOM_INSTS;
for (int i = 0; i < SERCOM_INST_NUM; i++) {
if (sercom_instances[i] == sercom) {
never_reset_sercoms[i] = true;
break;
}
}
}
void allow_reset_sercom(Sercom *sercom) {
// Reset all SERCOMs except the ones being used by on-board devices.
Sercom *sercom_instances[SERCOM_INST_NUM] = SERCOM_INSTS;
for (int i = 0; i < SERCOM_INST_NUM; i++) {
if (sercom_instances[i] == sercom) {
never_reset_sercoms[i] = false;
break;
}
}
}
void reset_sercoms(void) {
// Reset all SERCOMs except the ones being used by on-board devices.
Sercom *sercom_instances[SERCOM_INST_NUM] = SERCOM_INSTS;
for (int i = 0; i < SERCOM_INST_NUM; i++) {
if (never_reset_sercoms[i]) {
continue;
}
// SWRST is same for all modes of SERCOMs.
sercom_instances[i]->SPI.CTRLA.bit.SWRST = 1;
}
}