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https://github.com/ghsecuritylab/ameba_ws2812b.git
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74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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/* mbed Microcontroller Library
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* Copyright (c) 2006-2013 ARM Limited
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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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#ifndef MBED_SPI_API_H
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#define MBED_SPI_API_H
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#include "device.h"
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#if DEVICE_SPI
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define SPI_DMA_RX_EN (1<<0)
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#define SPI_DMA_TX_EN (1<<1)
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//#define SPI_SCLK_IDLE_LOW 0 // the SCLK is Low when SPI is inactive
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//#define SPI_SCLK_IDLE_HIGH 2 // the SCLK is High when SPI is inactive
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enum {
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SPI_SCLK_IDLE_LOW=0, // the SCLK is Low when SPI is inactive
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SPI_SCLK_IDLE_HIGH=2 // the SCLK is High when SPI is inactive
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};
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//#define SPI_CS_TOGGLE_EVERY_FRAME 0 // the CS toggle every frame
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//#define SPI_CS_TOGGLE_START_STOP 1 // the CS toggle at start and stop
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enum {
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SPI_CS_TOGGLE_EVERY_FRAME=0, // the CS toggle every frame
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SPI_CS_TOGGLE_START_STOP=1 // the CS toggle at start and stop
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};
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typedef enum {
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CS_0 = 0,
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CS_1 = 1,
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CS_2 = 2,
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CS_3 = 3,
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CS_4 = 4,
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CS_5 = 5,
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CS_6 = 6,
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CS_7 = 7
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}ChipSelect;
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typedef struct spi_s spi_t;
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void spi_init (spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel);
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void spi_free (spi_t *obj);
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void spi_format (spi_t *obj, int bits, int mode, int slave);
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void spi_frequency (spi_t *obj, int hz);
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int spi_master_write (spi_t *obj, int value);
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int spi_slave_receive(spi_t *obj);
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int spi_slave_read (spi_t *obj);
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void spi_slave_write (spi_t *obj, int value);
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int spi_busy (spi_t *obj);
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#ifdef __cplusplus
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}
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#endif
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#endif
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#endif
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