mirror of https://github.com/ARMmbed/mbed-os.git
107 lines
3.5 KiB
C
107 lines
3.5 KiB
C
/* mbed Microcontroller Library
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* Copyright (c) 2019 ARM Limited
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "analogin_api.h"
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#include "i2c_api.h"
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#include "spi_api.h"
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#include "gpio_api.h"
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#include "reset_reason_api.h"
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#include "mbed_toolchain.h"
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// To be re-implemented in the target layer if required
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MBED_WEAK void gpio_free(gpio_t *obj)
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{
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// Do nothing
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}
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#if DEVICE_I2C
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// To be re-implemented in the target layer if required
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MBED_WEAK void i2c_free(i2c_t *obj)
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{
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// Do nothing
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}
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#endif
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#if DEVICE_ANALOGIN
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// To be re-implemented in the target layer if required
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MBED_WEAK void analogin_free(analogin_t *obj)
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{
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// Do nothing
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}
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#endif
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#if DEVICE_SPI
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// Default SPI capabilities. If specific target has different capabilities this function needs to be re-implemented.
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MBED_WEAK void spi_get_capabilities(PinName ssel, bool slave, spi_capabilities_t *cap)
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{
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if (slave) {
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cap->minimum_frequency = 200000; // 200 kHz
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cap->maximum_frequency = 2000000; // 2 MHz
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cap->word_length = 0x00008080; // 8 and 16 bit symbols
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cap->support_slave_mode = false; // to be determined later based on ssel
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cap->hw_cs_handle = false; // irrelevant in slave mode
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cap->slave_delay_between_symbols_ns = 2500; // 2.5 us
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cap->clk_modes = 0x0f; // all clock modes
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cap->tx_rx_buffers_equal_length = true; // rx buffer size must be equal tx buffer size
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#if DEVICE_SPI_ASYNCH
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cap->async_mode = true;
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#else
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cap->async_mode = false;
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#endif
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} else {
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cap->minimum_frequency = 200000; // 200 kHz
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cap->maximum_frequency = 2000000; // 2 MHz
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cap->word_length = 0x00008080; // 8 and 16 bit symbols
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cap->support_slave_mode = false; // to be determined later based on ssel
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cap->hw_cs_handle = false; // to be determined later based on ssel
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cap->slave_delay_between_symbols_ns = 0; // irrelevant in master mode
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cap->clk_modes = 0x0f; // all clock modes
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cap->tx_rx_buffers_equal_length = true; // rx buffer size must be equal tx buffer size
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#if DEVICE_SPI_ASYNCH
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cap->async_mode = true;
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#else
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cap->async_mode = false;
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#endif
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}
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// check if given ssel pin is in the cs pinmap
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const PinMap *cs_pins = spi_master_cs_pinmap();
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while (cs_pins->pin != NC) {
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if (cs_pins->pin == ssel) {
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#if DEVICE_SPISLAVE
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cap->support_slave_mode = true;
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#endif
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cap->hw_cs_handle = true;
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break;
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}
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cs_pins++;
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}
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}
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#endif
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#if DEVICE_RESET_REASON
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// To be re-implemented in the target layer if required
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MBED_WEAK void hal_reset_reason_get_capabilities(reset_reason_capabilities_t *cap)
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{
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cap->reasons = (1 << RESET_REASON_PIN_RESET) | (1 << RESET_REASON_SOFTWARE);
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#if DEVICE_WATCHDOG
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cap->reasons |= 1 << RESET_REASON_WATCHDOG;
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#endif
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}
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#endif
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