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Proposed deduplication of peripherals, GPIO example

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See rambling post on dev list for justification
This commit is contained in:
Ken Sarkies
2012-11-03 15:56:35 +10:30
committed by Ken Sarkies
parent d08d366e75
commit 4ab5c94b90
13 changed files with 163 additions and 731 deletions
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5
lib/stm32/f1/Makefile
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@@ -32,9 +32,10 @@ OBJS = rcc.o gpio.o usart.o adc.o spi.o flash.o \
rtc.o i2c.o dma.o exti.o ethernet.o \
usb_f103.o usb.o usb_control.o usb_standard.o can.o \
timer.o usb_f107.o desig.o crc.o dac.o iwdg.o pwr.o \
usb_fx07_common.o
usb_fx07_common.o \
gpio_common_all.o
VPATH += ../../usb:../:../../cm3
VPATH += ../../usb:../:../../cm3:../common
include ../../Makefile.include

138
lib/stm32/f1/gpio.c
View File

@@ -1,4 +1,4 @@
/** @defgroup STM32F1xx_gpio_file GPIO
/** @defgroup gpio_file GPIO
@ingroup STM32F1xx
@@ -11,9 +11,6 @@
@date 18 August 2012
This library supports the General Purpose I/O System in the STM32F1xx series
of ARM Cortex Microcontrollers by ST Microelectronics.
Each I/O port has 16 individually configurable bits. Many I/O pins share GPIO
functionality with a number of alternate functions and must be configured to the
alternate function mode if these are to be accessed. A feature is available to
@@ -55,7 +52,7 @@ Example 1: Digital input on port C12
@endcode
LGPL License Terms @ref lgpl_license
*/
*/
/*
* This file is part of the libopencm3 project.
*
@@ -75,25 +72,10 @@ LGPL License Terms @ref lgpl_license
* along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Basic GPIO handling API.
*
* Examples:
* gpio_set_mode(GPIOC, GPIO_MODE_OUTPUT_2_MHZ,
* GPIO_CNF_OUTPUT_PUSHPULL, GPIO12);
* gpio_set(GPIOB, GPIO4);
* gpio_clear(GPIOG, GPIO2 | GPIO9);
* gpio_get(GPIOC, GPIO1);
* gpio_toggle(GPIOA, GPIO7 | GPIO8);
* reg16 = gpio_port_read(GPIOD);
* gpio_port_write(GPIOF, 0xc8fe);
*
* TODO:
* - GPIO remapping support
*/
/**@{*/
#include <libopencm3/stm32/gpio.h>
#include <libopencm3/stm32/common/gpio_common_all.h>
#include <libopencm3/stm32/f1/gpio.h>
/**@{*/
/*-----------------------------------------------------------------------------*/
/** @brief Set GPIO Pin Mode
@@ -145,116 +127,6 @@ void gpio_set_mode(u32 gpioport, u8 mode, u8 cnf, u16 gpios)
GPIO_CRH(gpioport) = crh;
}
/*-----------------------------------------------------------------------------*/
/** @brief Set a Group of Pins Atomic
Set one or more pins of the given GPIO port to 1 in an atomic operation.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@param[in] gpios Unsigned int16. Pin identifiers @ref gpio_pin_id
If multiple pins are to be changed, use logical OR '|' to separate them.
*/
void gpio_set(u32 gpioport, u16 gpios)
{
GPIO_BSRR(gpioport) = gpios;
}
/*-----------------------------------------------------------------------------*/
/** @brief Clear a Group of Pins Atomic
Clear one or more pins of the given GPIO port to 0 in an atomic operation.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@param[in] gpios Unsigned int16. Pin identifiers @ref gpio_pin_id
If multiple pins are to be changed, use logical OR '|' to separate them.
*/
void gpio_clear(u32 gpioport, u16 gpios)
{
GPIO_BRR(gpioport) = gpios;
}
/*-----------------------------------------------------------------------------*/
/** @brief Read a Group of Pins.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@param[in] gpios Unsigned int16. Pin identifiers @ref gpio_pin_id
If multiple pins are to be read, use logical OR '|' to separate them.
@return Unsigned int16 value of the pin values. The bit position of the pin value
returned corresponds to the pin number.
*/
u16 gpio_get(u32 gpioport, u16 gpios)
{
return gpio_port_read(gpioport) & gpios;
}
/*-----------------------------------------------------------------------------*/
/** @brief Toggle a Group of Pins
Toggle one or more pins of the given GPIO port. This is not an atomic operation.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@param[in] gpios Unsigned int16. Pin identifiers @ref gpio_pin_id
If multiple pins are to be changed, use logical OR '|' to separate them.
*/
void gpio_toggle(u32 gpioport, u16 gpios)
{
GPIO_ODR(gpioport) ^= gpios;
}
/*-----------------------------------------------------------------------------*/
/** @brief Read from a Port
Read the current value of the given GPIO port. Only the lower 16 bits contain
valid pin data.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@return Unsigned int16. The value held in the specified GPIO port.
*/
u16 gpio_port_read(u32 gpioport)
{
return (u16)GPIO_IDR(gpioport);
}
/*-----------------------------------------------------------------------------*/
/** @brief Write to a Port
Write a value to the given GPIO port.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@param[in] data Unsigned int16. The value to be written to the GPIO port.
*/
void gpio_port_write(u32 gpioport, u16 data)
{
GPIO_ODR(gpioport) = data;
}
/*-----------------------------------------------------------------------------*/
/** @brief Lock the Configuration of a Group of Pins
The configuration of one or more pins of the given GPIO port is locked. There is
no mechanism to unlock these via software. Unlocking occurs at the next reset.
@param[in] gpioport Unsigned int32. Port identifier @ref gpio_port_id
@param[in] gpios Unsigned int16. Pin identifiers @ref gpio_pin_id
If multiple pins are to be locked, use logical OR '|' to separate them.
*/
void gpio_port_config_lock(u32 gpioport, u16 gpios)
{
u32 reg32;
/* Special "Lock Key Writing Sequence", see datasheet. */
GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */
GPIO_LCKR(gpioport) = ~GPIO_LCKK & gpios; /* Clear LCKK. */
GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */
reg32 = GPIO_LCKR(gpioport); /* Read LCKK. */
reg32 = GPIO_LCKR(gpioport); /* Read LCKK again. */
/* Tell the compiler the variable is actually used. It will get optimized out anyways. */
reg32 = reg32;
/* If (reg32 & GPIO_LCKK) is true, the lock is now active. */
}
/*-----------------------------------------------------------------------------*/
/** @brief Map the EVENTOUT signal