hspi.c File Reference

HSPI driver for ESP8255 Based on initial work from Sem 2015 - rewrittem Added code to handle proper aligned reads and writes and buffering. More...

#include "user_config.h"
#include <stdint.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>
#include "hspi.h"
#include "gpio.h"

Go to the source code of this file.

Macros
#define	HSPI_PRESCALER   16

Functions
void	hspi_init (uint32_t prescale, int hwcs)
	HSPI Initiaization - with automatic chip select Pins: MISO GPIO12 MOSI GPIO13 CLK GPIO14 CS GPIO15 - optional DC GPIO2. More...
static void	hspi_config (int configState)
	HSPI Configuration for tranasmit and receive. More...
static void	hspi_setBits (uint16_t bytes)
	HSPI FIFO send or receive byte count. More...
static void	hspi_startSend (void)
	HSPI Start Send. More...
void	hspi_waitReady (void)
	HSPI Ready wait. More...
static void	hspi_writeFIFO (uint8_t *write_data, int bytes)
	HSPI FIFO write in units of 32 bits (4 byte words) More...
static void	hspi_readFIFO (uint8_t *read_data, int bytes)
	HSPI FIFO Read in units of 32 bits (4 byte words) More...
void	hspi_TX (uint8_t *data, int count)
	SPI buffered write functions. More...
void	hspi_TXRX (uint8_t *data, int count)
	HSPI write and read using FIFO. More...
void	hspi_RX (uint8_t *data, int count)
	HSPI read using FIFO. More...

Variables
static	_hspi_init_done = 0
uint32_t	hspi_clock = -1
	hspi clock cached value More...

Detailed Description

HSPI driver for ESP8255 Based on initial work from Sem 2015 - rewrittem Added code to handle proper aligned reads and writes and buffering.

Copyright © 2015 Sem

Copyright © 2015 Mike Gore, GPL License

You are free to use this code under the terms of GPL

Please retain a copy of this notice in any code you use it in.

This is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file hspi.c.

Macro Definition Documentation

#define HSPI_PRESCALER   16

Definition at line 37 of file hspi.c.

Function Documentation

static void hspi_config ( int  configState )

static

HSPI Configuration for tranasmit and receive.

Parameters

[in]

configState

CONFIG_FOR_RX_TX or CONFIG_FOR_RX

Returns

void

Definition at line 104 of file hspi.c.

Referenced by hspi_RX(), hspi_TX(), and hspi_TXRX().

void hspi_init	(	uint32_t	prescale,
		int	hwcs
	)

HSPI Initiaization - with automatic chip select Pins: MISO GPIO12 MOSI GPIO13 CLK GPIO14 CS GPIO15 - optional DC GPIO2.

Parameters

[in]	prescale	prescale from CPU clock 0 .. 0x1fff
[in]	hwcs	enable GPIO15 hardware chip select

Returns

void

Definition at line 55 of file hspi.c.

Referenced by setup(), and spi_init().

static void hspi_readFIFO ( uint8_t *  read_data, int  bytes  )

static

HSPI FIFO Read in units of 32 bits (4 byte words)

Parameters

[in]	read_data	read buffer
[in]	bytes	bytes to write

Returns

void

Definition at line 215 of file hspi.c.

Referenced by hspi_RX(), and hspi_TXRX().

void hspi_RX	(	uint8_t *	data,
		int	count
	)

HSPI read using FIFO.

Parameters

[in]	*data	receive buffer
[in]	count	number of bytes to read

Returns

void

Definition at line 318 of file hspi.c.

Referenced by spi_RX(), and spi_RX_buffer().

static void hspi_setBits ( uint16_t  bytes )

static

HSPI FIFO send or receive byte count.

Parameters

[in]

bytes

bytes to send or receive

Returns

void

Definition at line 140 of file hspi.c.

Referenced by hspi_readFIFO(), and hspi_writeFIFO().

static void hspi_startSend ( void  )

static

HSPI Start Send.

Returns

void

Definition at line 151 of file hspi.c.

Referenced by hspi_RX(), hspi_TX(), and hspi_TXRX().

void hspi_TX	(	uint8_t *	data,
		int	count
	)

SPI buffered write functions.

=================================================================HSPI write using FIFO

Parameters

[in]	*data	transmit buffer
[in]	count	number of bytes to write

Returns

void

Definition at line 265 of file hspi.c.

Referenced by spi_TX(), and spi_TX_buffer().

void hspi_TXRX	(	uint8_t *	data,
		int	count
	)

HSPI write and read using FIFO.

Parameters

[in]	*data	transmit / receive buffer
[in]	count	number of bytes to write / read

Returns

void

Definition at line 292 of file hspi.c.

Referenced by spi_TXRX(), and spi_TXRX_buffer().

void hspi_waitReady

(

void

)

HSPI Ready wait.

Returns

void

Definition at line 159 of file hspi.c.

Referenced by esp_yield(), hspi_config(), hspi_init(), hspi_RX(), hspi_TX(), hspi_TXRX(), loop_wrapper(), and spi_waitReady().

static void hspi_writeFIFO ( uint8_t *  write_data, int  bytes  )

static

HSPI FIFO write in units of 32 bits (4 byte words)

Parameters

[in]	write_data	write buffer
[in]	bytes	bytes to write

Returns

void

Definition at line 169 of file hspi.c.

Referenced by hspi_RX(), hspi_TX(), and hspi_TXRX().

Variable Documentation

_hspi_init_done = 0

static

Definition at line 41 of file hspi.c.

Referenced by hspi_init().

uint32_t hspi_clock = -1

hspi clock cached value

Definition at line 44 of file hspi.c.

Referenced by hspi_init().