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Diffstat (limited to 'c/src/lib/libbsp/arm/lpc176x/gpio/lpc-gpio.c')
-rw-r--r--c/src/lib/libbsp/arm/lpc176x/gpio/lpc-gpio.c392
1 files changed, 0 insertions, 392 deletions
diff --git a/c/src/lib/libbsp/arm/lpc176x/gpio/lpc-gpio.c b/c/src/lib/libbsp/arm/lpc176x/gpio/lpc-gpio.c
deleted file mode 100644
index e7f07fe657..0000000000
--- a/c/src/lib/libbsp/arm/lpc176x/gpio/lpc-gpio.c
+++ /dev/null
@@ -1,392 +0,0 @@
-/**
- * @file lpc-gpio.c
- *
- * @ingroup lpc176x
- *
- * @brief GPIO library for the lpc176x bsp.
- */
-
-/*
- * Copyright (c) 2014 Taller Technologies.
- *
- * @author Boretto Martin (martin.boretto@tallertechnologies.com)
- * @author Diaz Marcos (marcos.diaz@tallertechnologies.com)
- * @author Lenarduzzi Federico (federico.lenarduzzi@tallertechnologies.com)
- * @author Daniel Chicco (daniel.chicco@tallertechnologies.com)
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.org/license/LICENSE.
- */
-
-#include <assert.h>
-#include <bsp/irq.h>
-#include <bsp/io.h>
-#include <bsp/lpc-gpio.h>
-#include <rtems/status-checks.h>
-
-static uint32_t function_vector_size = 0u;
-static lpc176x_registered_interrupt_function function_vector[
- LPC176X_RESERVED_ISR_FUNCT_SIZE ];
-static bool isr_installed = false;
-
-rtems_status_code lpc176x_gpio_config(
- const lpc176x_pin_number pin,
- const lpc176x_gpio_direction dir
-)
-{
- rtems_status_code status_code = RTEMS_INVALID_NUMBER;
-
- if ( ( pin < LPC176X_MAX_PORT_NUMBER ) &&
- ( dir < LPC176X_GPIO_FUNCTION_COUNT ) ) {
- const lpc176x_gpio_ports port = LPC176X_IO_PORT( pin );
- const uint32_t pin_of_port = LPC176X_IO_PORT_BIT( pin );
-
- lpc176x_pin_select( pin, LPC176X_PIN_FUNCTION_00 );
-
- LPC176X_SET_BIT( LPC176X_FIO[ port ].dir, pin_of_port, dir );
-
- status_code = RTEMS_SUCCESSFUL;
- }
-
- /* else implies that the pin or the egde are out of range. Also,
- an invalid number is returned. */
-
- return status_code;
-}
-
-/**
- * @brief Check for a rising edge and call the interrupt function.
- *
- * @param statR Rising edge interrupt.
- * @param pin The pin to check.
- * @param registered_isr_function Interrupt to check.
- * @return TRUE if is a rising edge. FALSE otherwise.
- */
-static bool lpc176x_check_rising_edge_and_call(
- const uint32_t statR,
- const lpc176x_registered_interrupt_function registered_isr_function,
- const uint32_t pin
-)
-{
- bool is_rising = false;
-
- if ( statR & LPC176X_PIN_BIT( pin ) ) {
- registered_isr_function.function( registered_isr_function.pin,
- LPC176X_GPIO_INTERRUPT_RISING );
- is_rising = true;
- }
-
- /* else implies that the current interrupt is not STATR. Also,
- there is nothing to do. */
-
- return is_rising;
-}
-
-/**
- * @brief Check for a falling edge and call the interrupt function.
- *
- * @param statR Falling edge interrupt.
- * @param pin The pin to check.
- * @param registered_isr_function Interrupt to check.
- * @return TRUE if is a falling edge. FALSE otherwise.
- */
-static bool lpc176x_check_falling_edge_and_call(
- const uint32_t statF,
- const lpc176x_registered_interrupt_function registered_isr_function,
- const uint32_t pin
-)
-{
- bool is_falling = false;
-
- if ( statF & LPC176X_PIN_BIT( pin ) ) {
- registered_isr_function.function( registered_isr_function.pin,
- LPC176X_GPIO_INTERRUPT_FALLING );
- is_falling = true;
- }
-
- /* else implies that the current interrupt is not STATF. Also,
- there is nothing to do. */
-
- return is_falling;
-}
-
-/**
- * @brief Returns the interrupts base address according to the current port.
- *
- * @param port Input/Output port.
- * @return Interrupt base address.
- */
-static lpc176x_interrupt_control*lpc176x_get_interrupt_address(
- const lpc176x_gpio_ports port )
-{
- lpc176x_interrupt_control *interrupt;
-
- switch ( port ) {
- case ( LPC176X_GPIO_PORT_0 ):
- interrupt = (lpc176x_interrupt_control *) LPC176X_IO0_INT_BASE_ADDRESS;
- break;
- case ( LPC176X_GPIO_PORT_2 ):
- interrupt = (lpc176x_interrupt_control *) LPC176X_IO2_INT_BASE_ADDRESS;
- break;
- case ( LPC176X_GPIO_PORT_1 ):
- case ( LPC176X_GPIO_PORT_3 ):
- case ( LPC176X_GPIO_PORT_4 ):
- default:
- interrupt = NULL;
- }
-
- return interrupt;
-}
-
-/**
- * @brief Checks the type of the current interrupt.
- *
- * @param registered_isr_function Interrupt to check.
- */
-static void check_for_interrupt(
- const lpc176x_registered_interrupt_function registered_isr_function )
-{
- assert( registered_isr_function.pin < LPC176X_MAX_PORT_NUMBER );
-
- const lpc176x_gpio_ports port = LPC176X_IO_PORT(
- registered_isr_function.pin );
- const uint32_t pin = LPC176X_IO_PORT_BIT( registered_isr_function.pin );
-
- lpc176x_interrupt_control *interrupt = lpc176x_get_interrupt_address( port );
- assert( interrupt != NULL );
-
- bool is_rising_edge = lpc176x_check_rising_edge_and_call( interrupt->StatR,
- registered_isr_function,
- pin );
-
- bool is_falling_edge = lpc176x_check_falling_edge_and_call( interrupt->StatF,
- registered_isr_function,
- pin );
-
- if ( is_rising_edge || is_falling_edge ) {
- interrupt->Clr = LPC176X_PIN_BIT( pin );
- }
-
- /* else implies that the current interrupt is not CLR. Also,
- there is nothing to do. */
-}
-
-/**
- * @brief Checks all interrupts types.
- *
- * @param arg Interrupt to check.
- */
-static inline void lpc176x_gpio_isr( void *arg )
-{
- unsigned int i;
-
- for ( i = 0; i < function_vector_size; ++i ) {
- check_for_interrupt( function_vector[ i ] );
- }
-}
-
-/**
- * @brief Depending of the current edge sets rising/falling interrupt.
- *
- * @param edge Current edge.
- * @param pin_of_port Pin of the port to set the interrupt.
- * @param interrupt To enable the falling o rising edge.
- */
-static void lpc176x_set_falling_or_rising_interrupt(
- const lpc176x_gpio_interrupt edge,
- const uint32_t pin_of_port,
- lpc176x_interrupt_control *interrupt
-)
-{
- if ( edge & LPC176X_GPIO_INTERRUPT_RISING ) {
- LPC176X_SET_BIT( interrupt->EnR, pin_of_port, LPC176X_INT_ENABLE );
- }
-
- /* else implies that it should not install the interrupt for a RISING edge.
- Also, there is nothing to do. */
-
- if ( edge & LPC176X_GPIO_INTERRUPT_FALLING ) {
- LPC176X_SET_BIT( interrupt->EnF, pin_of_port, LPC176X_INT_ENABLE );
- }
-
- /* else implies that it should not install the interrupt for a FALLING edge.
- Also, there is nothing to do. */
-}
-
-/**
- * @brief Registers the pin and the callbacks functions.
- *
- * @param edge Current edge.
- * @param pin The pin to configure.
- * @param isr_funct Callback function to set.
- */
-static void lpc176x_register_pin_and_callback(
- const lpc176x_gpio_interrupt edge,
- const lpc176x_pin_number pin,
- const lpc176x_gpio_interrupt_function isr_funct
-)
-{
- if ( edge ) {
- assert( function_vector_size < LPC176X_RESERVED_ISR_FUNCT_SIZE );
- function_vector[ function_vector_size ].function = isr_funct;
- function_vector[ function_vector_size ].pin = pin;
- ++function_vector_size;
- }
-
- /* else implies that the current interrupt is DISABLED or BOTH. Also,
- there is nothing to do. */
-}
-
-/**
- * @brief Installs the interrupt handler.
- *
- * @param edge Which edge enable.
- * @return RTEMS_SUCCESSFUL if the installation was success.
- */
-static rtems_status_code lpc176x_install_interrupt_handler(
- const lpc176x_gpio_interrupt edge )
-{
- rtems_status_code status_code = RTEMS_SUCCESSFUL;
-
- if ( !isr_installed && edge ) {
- status_code = rtems_interrupt_handler_install( LPC176X_IRQ_EINT_3,
- "gpio_interrupt",
- RTEMS_INTERRUPT_UNIQUE,
- lpc176x_gpio_isr,
- NULL );
- isr_installed = true;
- }
-
- /* else implies that the interrupts have been previously installed. Also,
- there is nothing to do. */
-
- return status_code;
-}
-
-/**
- * @brief Configures the pin as input, enables interrupt for an
- * edge/s and sets isrfunct as the function to call when that
- * interrupt occurs.
- *
- * @param pin The pin to configure.
- * @param edge Which edge or edges will activate the interrupt.
- * @param isrfunct The function that is called when the interrupt occurs.
- * @return RTEMS_SUCCESSFUL if the configuration was success.
- */
-static rtems_status_code lpc176x_check_edge_and_set_gpio_interrupts(
- const lpc176x_pin_number pin,
- const lpc176x_gpio_interrupt edge,
- const lpc176x_gpio_interrupt_function isr_funct
-)
-{
- rtems_status_code status_code = RTEMS_SUCCESSFUL;
-
- const lpc176x_gpio_ports port = LPC176X_IO_PORT( pin );
- const uint32_t pin_of_port = LPC176X_IO_PORT_BIT( pin );
-
- lpc176x_interrupt_control *interrupt = lpc176x_get_interrupt_address( port );
-
- assert( interrupt != NULL );
-
- lpc176x_gpio_config( pin, LPC176X_GPIO_FUNCTION_INPUT );
-
- lpc176x_set_falling_or_rising_interrupt( edge, pin_of_port, interrupt );
-
- lpc176x_register_pin_and_callback( edge, pin, isr_funct );
-
- status_code = lpc176x_install_interrupt_handler( edge );
-
- return status_code;
-}
-
-rtems_status_code lpc176x_gpio_config_input_with_interrupt(
- const lpc176x_pin_number pin,
- const lpc176x_gpio_interrupt edge,
- const lpc176x_gpio_interrupt_function isr_funct
-)
-{
- rtems_status_code status_code = RTEMS_INVALID_NUMBER;
-
- if ( ( pin < LPC176X_MAX_PORT_NUMBER )
- && ( edge < LPC176X_GPIO_INTERRUPT_COUNT ) ) {
- status_code = lpc176x_check_edge_and_set_gpio_interrupts( pin,
- edge,
- isr_funct );
- }
-
- /* else implies that the pin or the egde are out of range. Also,
- an invalid number is returned. */
-
- return status_code;
-}
-
-rtems_status_code lpc176x_gpio_set_pin( const lpc176x_pin_number pin )
-{
- rtems_status_code status_code = RTEMS_INVALID_NUMBER;
-
- if ( pin < LPC176X_MAX_PORT_NUMBER ) {
- const lpc176x_gpio_ports port = LPC176X_IO_PORT( pin );
- const uint32_t pin_of_port = LPC176X_IO_PORT_BIT( pin );
-
- LPC176X_FIO[ port ].set = LPC176X_PIN_BIT( pin_of_port );
-
- status_code = RTEMS_SUCCESSFUL;
- }
-
- /* else implies that the pin or the egde are out of range. Also,
- an invalid number is returned. */
-
- return status_code;
-}
-
-rtems_status_code lpc176x_gpio_clear_pin( const lpc176x_pin_number pin )
-{
- rtems_status_code status_code = RTEMS_INVALID_NUMBER;
-
- if ( pin < LPC176X_MAX_PORT_NUMBER ) {
- const lpc176x_gpio_ports port = LPC176X_IO_PORT( pin );
- const uint32_t pin_of_port = LPC176X_IO_PORT_BIT( pin );
-
- LPC176X_FIO[ port ].clr = LPC176X_PIN_BIT( pin_of_port );
-
- status_code = RTEMS_SUCCESSFUL;
- }
-
- /* else implies that the pin or the egde are out of range. Also,
- an invalid number is returned. */
-
- return status_code;
-}
-
-rtems_status_code lpc176x_gpio_write_pin(
- const lpc176x_pin_number pin,
- const bool value
-)
-{
- rtems_status_code status_code;
-
- if ( value ) {
- status_code = lpc176x_gpio_set_pin( pin );
- } else {
- status_code = lpc176x_gpio_clear_pin( pin );
- }
-
- return status_code;
-}
-
-inline rtems_status_code lpc176x_gpio_get_pin_value(
- const lpc176x_pin_number pin,
- bool *pin_value
-)
-{
- assert( pin < LPC176X_MAX_PORT_NUMBER );
-
- rtems_status_code status_code = RTEMS_SUCCESSFUL;
-
- const lpc176x_gpio_ports port = LPC176X_IO_PORT( pin );
- const uint32_t pin_of_port = LPC176X_IO_PORT_BIT( pin );
- *pin_value = ( LPC176X_FIO[ port ].pin & LPC176X_PIN_BIT( pin_of_port ) );
-
- return status_code;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-05 03:57:14 +0000