hal.c File Reference

HAL layer SPI, GPIO, address and chip select. More...

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

Go to the source code of this file.

Functions
void	gpio_pin_sfr_mode (int pin)
	GPIO HAL. More...
void	gpio_pin_out (uint8_t pin, uint8_t val)
	set GPIO pin state HI or LOW More...
uint8_t	gpio_pin_rd (uint8_t pin)
	read GPIO pin More...
void	chip_select_init (uint8_t pin)
	CHIP select HAL. More...
void	chip_select (uint8_t pin)
	set GPIO to select - LOW More...
void	chip_deselect (uint8_t pin)
	set GPIO to deselect - HI More...
void	chip_addr_init ()
	ADDRESS select HAL. More...
void	chip_addr (int addr)
	set address on GPIO lines More...
void	spi_waitReady ()
	SPI bus wrapper functions for multiple device support. More...
void	spi_init (uint32_t clock, int pin)
void	spi_begin (uint32_t clock, int pin)
	SPI chip enable function Function waits for current tranaction to finish before proceeding. More...
void	spi_end (uint8_t pin)
	SPI chip disable function wait for current tranaction to finish! More...
uint8_t	spi_chip_select_status ()
	SPI CS pin status return CS GPIO pin number or 0xff. More...
void	spi_TX_buffer (const uint8_t *data, int count)
	SPI write buffer. More...
void	spi_RX_buffer (const uint8_t *data, int count)
	SPI read buffer. More...
void	spi_TXRX_buffer (const uint8_t *data, int count)
	SPI write/read buffer. More...
uint8_t	spi_RX ()
	SPI read 1 byte. More...
void	spi_TX (uint8_t data)
	SPI write 1 byte. More...
uint8_t	spi_TXRX (uint8_t data)
	SPI read and write 1 byte. More...

Variables
uint8_t	_cs_pin = 0xff
	SPI init function Function waits for current tranaction to finish before proceeding. More...
uint32_t	_spi_clock = -1L

Detailed Description

HAL layer SPI, GPIO, address and chip select.

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 hal.c.

Function Documentation

void chip_addr

(

int

addr

)

set address on GPIO lines

See also

chip_addr_init

Parameters

[in]

addr

device address

Returns

void

Definition at line 271 of file hal.c.

void chip_addr_init

(

void

)

ADDRESS select HAL.

initialize GPIO pin as address lines for a device

Returns

void

Definition at line 242 of file hal.c.

Referenced by setup(), and tft_addr_init().

void chip_deselect

(

uint8_t

pin

)

set GPIO to deselect - HI

Parameters

[in]

pin

GPIO pin number

Returns

void

Definition at line 227 of file hal.c.

Referenced by spi_end(), and spi_init().

void chip_select

(

uint8_t

pin

)

set GPIO to select - LOW

Parameters

[in]

pin

GPIO pin number

Returns

void

Definition at line 213 of file hal.c.

Referenced by spi_begin().

void chip_select_init

(

uint8_t

pin

)

CHIP select HAL.

initilize GPIO as an active HI chip select

Parameters

[in]

pin

GPIO pin number

Returns

void

Definition at line 198 of file hal.c.

Referenced by mmc_spi_init(), setup(), tft_reset_init(), tft_spi_init_fast(), and tft_spi_init_slow().

void gpio_pin_out	(	uint8_t	pin,
		uint8_t	val
	)

set GPIO pin state HI or LOW

Parameters

[in]	pin	GPIO pin number
[in]	val	1 for output, 0 for input

Returns

void

Definition at line 155 of file hal.c.

uint8_t gpio_pin_rd

(

uint8_t

pin

)

read GPIO pin

Parameters

[in]

pin

GPIO pin number

Returns

1 or 0

Definition at line 178 of file hal.c.

void gpio_pin_sfr_mode

(

int

pin

)

GPIO HAL.

AVR GPIO MACROs.

set GPIO SFR to permit normal GPIO mode

Parameters

[in]

pin

gpin pin number

Returns

void

Definition at line 52 of file hal.c.

void spi_begin	(	uint32_t	clock,
		int	pin
	)

SPI chip enable function Function waits for current tranaction to finish before proceeding.

See also

spi_waitReady

chip_select

Parameters

[in]	clock	SPI clock rate
[in]	pin	GPIO CS pin

Returns

void

initialize pin in case it has not been done yet @ we cache the clock frequency seeting for multiple device support

Definition at line 355 of file hal.c.

Referenced by mmc_spi_begin(), and tft_spi_begin().

uint8_t spi_chip_select_status

(

void

)

SPI CS pin status return CS GPIO pin number or 0xff.

Definition at line 404 of file hal.c.

Referenced by loop().

void spi_end

(

uint8_t

pin

)

SPI chip disable function wait for current tranaction to finish!

See also

spi_waitReady

chip_deselect

Parameters

[in]

pin

GPIO CS pin

Returns

void

Definition at line 388 of file hal.c.

Referenced by loop(), mmc_spi_end(), and tft_spi_end().

void spi_init	(	uint32_t	clock,
		int	pin
	)

Definition at line 327 of file hal.c.

Referenced by spi_begin().

uint8_t spi_RX

(

void

)

SPI read 1 byte.

Returns

uint8_t value

Definition at line 454 of file hal.c.

void spi_RX_buffer	(	const uint8_t *	data,
		int	count
	)

SPI read buffer.

Parameters

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

Returns

void

Definition at line 428 of file hal.c.

Referenced by mmc_spi_RX_buffer(), and tft_spi_RX().

void spi_TX

(

uint8_t

data

)

SPI write 1 byte.

Parameters

[in]

data

value to transmit

Returns

void

Definition at line 469 of file hal.c.

Referenced by spi_init().

void spi_TX_buffer	(	const uint8_t *	data,
		int	count
	)

SPI write buffer.

Parameters

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

Returns

void

Definition at line 414 of file hal.c.

Referenced by mmc_spi_TX_buffer(), and tft_spi_TX().

uint8_t spi_TXRX

(

uint8_t

data

)

SPI read and write 1 byte.

Parameters

[in]

data

value to transmit

Returns

uint8_t value read

Definition at line 483 of file hal.c.

Referenced by mmc_spi_TXRX().

void spi_TXRX_buffer	(	const uint8_t *	data,
		int	count
	)

SPI write/read buffer.

Parameters

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

Returns

void

Definition at line 442 of file hal.c.

Referenced by tft_spi_TXRX().

void spi_waitReady

(

void

)

SPI bus wrapper functions for multiple device support.

Function waits for current SPI tranaction to finish before proceeding

Returns

void

Definition at line 306 of file hal.c.

Referenced by spi_begin(), spi_end(), spi_init(), tft_spi_RX(), tft_spi_TX(), and tft_spi_TXRX().

Variable Documentation

uint8_t _cs_pin = 0xff

SPI init function Function waits for current tranaction to finish before proceeding.

See also

spi_waitReady

chip_select

Parameters

[in]	clock	SPI clock rate
[in]	pin	GPIO CS pin

Returns

void

Definition at line 325 of file hal.c.

Referenced by spi_begin(), spi_chip_select_status(), spi_end(), and spi_init().

uint32_t _spi_clock = -1L

Definition at line 326 of file hal.c.

Referenced by spi_begin(), and spi_init().