150 lines
5.0 KiB
C
150 lines
5.0 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// 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.
|
|
|
|
#ifndef MAIN_ESP32_HAL_SPI_H_
|
|
#define MAIN_ESP32_HAL_SPI_H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#include "sdkconfig.h"
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#define SPI_HAS_TRANSACTION
|
|
|
|
#if CONFIG_IDF_TARGET_ESP32C3 || CONFIG_IDF_TARGET_ESP32S3
|
|
#define FSPI 0
|
|
#define HSPI 1
|
|
#else
|
|
#define FSPI 1 //SPI bus attached to the flash (can use the same data lines but different SS)
|
|
#define HSPI 2 //SPI bus normally mapped to pins 12 - 15, but can be matrixed to any pins
|
|
#if CONFIG_IDF_TARGET_ESP32
|
|
#define VSPI 3 //SPI bus normally attached to pins 5, 18, 19 and 23, but can be matrixed to any pins
|
|
#endif
|
|
#endif
|
|
|
|
// This defines are not representing the real Divider of the ESP32
|
|
// the Defines match to an AVR Arduino on 16MHz for better compatibility
|
|
#define SPI_CLOCK_DIV2 0x00101001 //8 MHz
|
|
#define SPI_CLOCK_DIV4 0x00241001 //4 MHz
|
|
#define SPI_CLOCK_DIV8 0x004c1001 //2 MHz
|
|
#define SPI_CLOCK_DIV16 0x009c1001 //1 MHz
|
|
#define SPI_CLOCK_DIV32 0x013c1001 //500 KHz
|
|
#define SPI_CLOCK_DIV64 0x027c1001 //250 KHz
|
|
#define SPI_CLOCK_DIV128 0x04fc1001 //125 KHz
|
|
|
|
#define SPI_MODE0 0
|
|
#define SPI_MODE1 1
|
|
#define SPI_MODE2 2
|
|
#define SPI_MODE3 3
|
|
|
|
#define SPI_CS0 0
|
|
#define SPI_CS1 1
|
|
#define SPI_CS2 2
|
|
#define SPI_CS_MASK_ALL 0x7
|
|
|
|
#define SPI_LSBFIRST 0
|
|
#define SPI_MSBFIRST 1
|
|
|
|
struct spi_struct_t;
|
|
typedef struct spi_struct_t spi_t;
|
|
|
|
spi_t * spiStartBus(uint8_t spi_num, uint32_t clockDiv, uint8_t dataMode, uint8_t bitOrder);
|
|
void spiStopBus(spi_t * spi);
|
|
|
|
//Attach/Detach Signal Pins
|
|
void spiAttachSCK(spi_t * spi, int8_t sck);
|
|
void spiAttachMISO(spi_t * spi, int8_t miso);
|
|
void spiAttachMOSI(spi_t * spi, int8_t mosi);
|
|
void spiDetachSCK(spi_t * spi, int8_t sck);
|
|
void spiDetachMISO(spi_t * spi, int8_t miso);
|
|
void spiDetachMOSI(spi_t * spi, int8_t mosi);
|
|
|
|
//Attach/Detach SS pin to SPI_CSx signal
|
|
void spiAttachSS(spi_t * spi, uint8_t cs_num, int8_t ss);
|
|
void spiDetachSS(spi_t * spi, int8_t ss);
|
|
|
|
//Enable/Disable SPI_CSx pins
|
|
void spiEnableSSPins(spi_t * spi, uint8_t cs_mask);
|
|
void spiDisableSSPins(spi_t * spi, uint8_t cs_mask);
|
|
|
|
//Enable/Disable hardware control of SPI_CSx pins
|
|
void spiSSEnable(spi_t * spi);
|
|
void spiSSDisable(spi_t * spi);
|
|
|
|
//Activate enabled SPI_CSx pins
|
|
void spiSSSet(spi_t * spi);
|
|
//Deactivate enabled SPI_CSx pins
|
|
void spiSSClear(spi_t * spi);
|
|
|
|
void spiWaitReady(spi_t * spi);
|
|
|
|
uint32_t spiGetClockDiv(spi_t * spi);
|
|
uint8_t spiGetDataMode(spi_t * spi);
|
|
uint8_t spiGetBitOrder(spi_t * spi);
|
|
|
|
|
|
/*
|
|
* Non transaction based lock methods (each locks and unlocks when called)
|
|
* */
|
|
void spiSetClockDiv(spi_t * spi, uint32_t clockDiv);
|
|
void spiSetDataMode(spi_t * spi, uint8_t dataMode);
|
|
void spiSetBitOrder(spi_t * spi, uint8_t bitOrder);
|
|
|
|
void spiWrite(spi_t * spi, const uint32_t *data, uint8_t len);
|
|
void spiWriteByte(spi_t * spi, uint8_t data);
|
|
void spiWriteWord(spi_t * spi, uint16_t data);
|
|
void spiWriteLong(spi_t * spi, uint32_t data);
|
|
|
|
void spiTransfer(spi_t * spi, uint32_t *out, uint8_t len);
|
|
uint8_t spiTransferByte(spi_t * spi, uint8_t data);
|
|
uint16_t spiTransferWord(spi_t * spi, uint16_t data);
|
|
uint32_t spiTransferLong(spi_t * spi, uint32_t data);
|
|
void spiTransferBytes(spi_t * spi, const uint8_t * data, uint8_t * out, uint32_t size);
|
|
void spiTransferBits(spi_t * spi, uint32_t data, uint32_t * out, uint8_t bits);
|
|
|
|
/*
|
|
* New (EXPERIMENTAL) Transaction lock based API (lock once until endTransaction)
|
|
* */
|
|
void spiTransaction(spi_t * spi, uint32_t clockDiv, uint8_t dataMode, uint8_t bitOrder);
|
|
void spiSimpleTransaction(spi_t * spi);
|
|
void spiEndTransaction(spi_t * spi);
|
|
|
|
void spiWriteNL(spi_t * spi, const void * data_in, uint32_t len);
|
|
void spiWriteByteNL(spi_t * spi, uint8_t data);
|
|
void spiWriteShortNL(spi_t * spi, uint16_t data);
|
|
void spiWriteLongNL(spi_t * spi, uint32_t data);
|
|
void spiWritePixelsNL(spi_t * spi, const void * data_in, uint32_t len);
|
|
|
|
#define spiTransferNL(spi, data, len) spiTransferBytesNL(spi, data, data, len)
|
|
uint8_t spiTransferByteNL(spi_t * spi, uint8_t data);
|
|
uint16_t spiTransferShortNL(spi_t * spi, uint16_t data);
|
|
uint32_t spiTransferLongNL(spi_t * spi, uint32_t data);
|
|
void spiTransferBytesNL(spi_t * spi, const void * data_in, uint8_t * data_out, uint32_t len);
|
|
void spiTransferBitsNL(spi_t * spi, uint32_t data_in, uint32_t * data_out, uint8_t bits);
|
|
|
|
/*
|
|
* Helper functions to translate frequency to clock divider and back
|
|
* */
|
|
uint32_t spiFrequencyToClockDiv(uint32_t freq);
|
|
uint32_t spiClockDivToFrequency(uint32_t freq);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* MAIN_ESP32_HAL_SPI_H_ */
|