#include <inttypes.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include "main.h"
#include "acc_integration.h"
#include "acc_reg_protocol.h"
#include "i2c_application_system.h"

Data Structures
struct	gpio_config_t
	GPIO config status, maps directly to the GPIO registers. More...

Macros
#define	I2C_SLAVE_BUFFER_SIZE 4

#define	WAIT_FOR_IDLE_RETRIES 10U

#define	WAIT_FOR_IDLE_RETRY_INTERNAL_MS 10U

#define	GPIO_BANK_COUNT 3U

#define	I2C_ADDRESS_FLOATING (0x52)

#define	I2C_ADDRESS_LOW (0x51)

#define	I2C_ADDRESS_HIGH (0x53)

Enumerations
enum	pin_state_t { PIN_STATE_LOW, PIN_STATE_HIGH, PIN_STATE_FLOATING }

Functions
static void	disable_interrupts (void)
	Disable interrupts. More...

static void	enable_interrupts (void)
	Enable interrupts. More...

static void	prepare_power_down (void)
	Prepare power down state. More...

static void	resume_power_down (void)
	Resume power down state. More...

static uint32_t	get_rtc_tick (void)
	Get RTC ticks based on current RTC time. More...

static void	rtc_tick_to_time (uint32_t tick, RTC_TimeTypeDef *time)
	Convert RTC ticks to RTC time. More...

static void	rtc_set_next_wakeup_time (void)
	Function for setting the next wakeup time from the RTC interrupt. More...

static void	wait_for_i2c_idle (void)
	Wait for I2C interface to be idle. More...

static void	prepare_register_data (I2C_HandleTypeDef *hi2c)
	Helper function to prepare transmit of register data. More...

static uint32_t	get_i2c_address (void)
	Helper function to get i2c address from I2C_ADDRESS pin pin state. More...

static pin_state_t	get_pin_state (GPIO_TypeDef *gpio_port, uint32_t gpio_pin)
	Helper function to the state (HIGH/LOW/FLOATING) of a gpio pin. More...

void	i2c_application_system_init (void)
	Init the system. More...

void	i2c_application_system_reset (void)
	Reset the system. More...

void	i2c_application_system_wait_for_interrupt (void)
	Wait for interrupt to occur. More...

bool	i2c_application_system_test_wakeup_pin (void)
	Check if wakeup pin is high. More...

void	i2c_application_system_set_ready_pin (bool enable)
	Set the ready pin state. More...

void	i2c_application_system_setup_generic_gpio_pin (bool enable)
	Setup the generic gpio pin. More...

void	i2c_application_system_set_generic_gpio_pin (bool enable)
	Set the generic gpio pin output state. More...

void	i2c_application_enter_low_power_state (void)
	Make the MCU enter its low power state. More...

void	i2c_application_set_periodic_wakeup (uint32_t period_ms)
	Set up a periodic timer used to wake up the system from sleep. More...

bool	i2c_application_is_periodic_wakeup (void)
	Test if a periodic wake up has occurred. More...

void	HAL_RTCEx_AlarmBEventCallback (RTC_HandleTypeDef *rtc)
	IRQ Handler for RTC B Alarm. More...

void	HAL_I2C_AddrCallback (I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode)

void	HAL_I2C_SlaveTxCpltCallback (I2C_HandleTypeDef *hi2c)

void	HAL_I2C_SlaveRxCpltCallback (I2C_HandleTypeDef *hi2c)

void	HAL_I2C_ListenCpltCallback (I2C_HandleTypeDef *hi2c)

void	HAL_I2C_ErrorCallback (I2C_HandleTypeDef *hi2c)

Variables
SPI_HandleTypeDef	A121_SPI_HANDLE

I2C_HandleTypeDef	MODULE_I2C_HANDLE

UART_HandleTypeDef	MODULE_UART1_HANDLE

UART_HandleTypeDef	MODULE_UART2_HANDLE

RTC_HandleTypeDef	MODULE_RTC_HANDLE

static RCC_OscInitTypeDef	low_power_saved_rcc_oscinitstruct

static RCC_ClkInitTypeDef	low_power_saved_rcc_clkinitstruct

static uint32_t	low_power_saved_flatency

static gpio_config_t	low_power_saved_gpio_bank [3U] = {0}

static GPIO_TypeDef *	gpio_banks [3U] = {GPIOA, GPIOB, GPIOH}

static uint8_t	i2c_slave_buffer [4]

static volatile bool	i2c_idle = true

static uint32_t	rtc_period_time_ms = 0

static volatile bool	rtc_wakeup_triggered = false

Macro Definition Documentation

◆ GPIO_BANK_COUNT

#define GPIO_BANK_COUNT 3U

Definition at line 21 of file i2c_application_system_stm32.c.

◆ I2C_ADDRESS_FLOATING

#define I2C_ADDRESS_FLOATING (0x52)

Definition at line 23 of file i2c_application_system_stm32.c.

◆ I2C_ADDRESS_HIGH

#define I2C_ADDRESS_HIGH (0x53)

Definition at line 25 of file i2c_application_system_stm32.c.

◆ I2C_ADDRESS_LOW

#define I2C_ADDRESS_LOW (0x51)

Definition at line 24 of file i2c_application_system_stm32.c.

◆ I2C_SLAVE_BUFFER_SIZE

#define I2C_SLAVE_BUFFER_SIZE 4

Definition at line 18 of file i2c_application_system_stm32.c.

◆ WAIT_FOR_IDLE_RETRIES

#define WAIT_FOR_IDLE_RETRIES 10U

Definition at line 19 of file i2c_application_system_stm32.c.

◆ WAIT_FOR_IDLE_RETRY_INTERNAL_MS

#define WAIT_FOR_IDLE_RETRY_INTERNAL_MS 10U

Definition at line 20 of file i2c_application_system_stm32.c.

Enumeration Type Documentation

◆ pin_state_t

enum pin_state_t

Enumerator
PIN_STATE_LOW
PIN_STATE_HIGH
PIN_STATE_FLOATING

Definition at line 27 of file i2c_application_system_stm32.c.

Function Documentation

◆ disable_interrupts()

static void disable_interrupts ( void )

inlinestatic

Disable interrupts.

Definition at line 268 of file i2c_application_system_stm32.c.

◆ enable_interrupts()

static void enable_interrupts ( void )

inlinestatic

Enable interrupts.

Definition at line 275 of file i2c_application_system_stm32.c.

◆ get_i2c_address()

static uint32_t get_i2c_address ( void )

static

Helper function to get i2c address from I2C_ADDRESS pin pin state.

Returns: The i2c address to use

Definition at line 503 of file i2c_application_system_stm32.c.

◆ get_pin_state()

static pin_state_t get_pin_state	(	GPIO_TypeDef *	gpio_port,
		uint32_t	gpio_pin
	)

static

Helper function to the state (HIGH/LOW/FLOATING) of a gpio pin.

Parameters

[in]	gpio_port	The GPIO port
[in]	gpio_pin	The GPIO pin

Returns: The pin state

Definition at line 525 of file i2c_application_system_stm32.c.

◆ get_rtc_tick()

static uint32_t get_rtc_tick ( void )

static

Get RTC ticks based on current RTC time.

Returns: The current RTC ticks in ms

Definition at line 373 of file i2c_application_system_stm32.c.

◆ HAL_I2C_AddrCallback()

void HAL_I2C_AddrCallback	(	I2C_HandleTypeDef *	hi2c,
		uint8_t	TransferDirection,
		uint16_t	AddrMatchCode
	)

Calling this function with wrong parameters will return HAL_ERROR Calling this function when the i2c module is in the wrong state return HAL_BUSY

Definition at line 569 of file i2c_application_system_stm32.c.

◆ HAL_I2C_ErrorCallback()

void HAL_I2C_ErrorCallback ( I2C_HandleTypeDef * hi2c )

The data NACK is the only valid error code

Definition at line 652 of file i2c_application_system_stm32.c.

◆ HAL_I2C_ListenCpltCallback()

void HAL_I2C_ListenCpltCallback ( I2C_HandleTypeDef * hi2c )

Calling this function with wrong parameters will return HAL_ERROR Calling this function when the i2c module is in the wrong state return HAL_BUSY

Definition at line 637 of file i2c_application_system_stm32.c.

◆ HAL_I2C_SlaveRxCpltCallback()

void HAL_I2C_SlaveRxCpltCallback ( I2C_HandleTypeDef * hi2c )

Calling this function with wrong parameters will return HAL_ERROR Calling this function when the i2c module is in the wrong state return HAL_BUSY

Definition at line 604 of file i2c_application_system_stm32.c.

◆ HAL_I2C_SlaveTxCpltCallback()

void HAL_I2C_SlaveTxCpltCallback ( I2C_HandleTypeDef * hi2c )

Definition at line 598 of file i2c_application_system_stm32.c.

◆ HAL_RTCEx_AlarmBEventCallback()

void HAL_RTCEx_AlarmBEventCallback ( RTC_HandleTypeDef * rtc )

IRQ Handler for RTC B Alarm.

Definition at line 262 of file i2c_application_system_stm32.c.

◆ i2c_application_enter_low_power_state()

void i2c_application_enter_low_power_state ( void )

Make the MCU enter its low power state.

This function is called by the i2c application when the MCU should power down.

Wait for the i2c interface to be idle, if not idle after retries, power down anyway!

Definition at line 215 of file i2c_application_system_stm32.c.

◆ i2c_application_is_periodic_wakeup()

bool i2c_application_is_periodic_wakeup ( void )

Test if a periodic wake up has occurred.

Returns: true if a periodic wake up has occurred

Definition at line 244 of file i2c_application_system_stm32.c.

◆ i2c_application_set_periodic_wakeup()

void i2c_application_set_periodic_wakeup ( uint32_t period_ms )

Set up a periodic timer used to wake up the system from sleep.

If the time_msec is set to zero the periodic wakeup will be disabled.

Parameters

period_ms Period time in milliseconds

Definition at line 238 of file i2c_application_system_stm32.c.

◆ i2c_application_system_init()

void i2c_application_system_init ( void )

Init the system.

This function is called by the i2c application during initialization.

Calling this function with wrong parameters will return HAL_ERROR Calling this function when the i2c module is in the wrong state return HAL_BUSY

Definition at line 130 of file i2c_application_system_stm32.c.

◆ i2c_application_system_reset()

void i2c_application_system_reset ( void )

Reset the system.

This function is called by the i2c application when the system should be restarted.

Wait for the i2c interface to be idle, if not idle after retries, reset anyway!

Definition at line 158 of file i2c_application_system_stm32.c.

◆ i2c_application_system_set_generic_gpio_pin()

void i2c_application_system_set_generic_gpio_pin ( bool enable )

Set the generic gpio pin output state.

This function is used to set the output state of the generic gpio pin

Parameters

[in] enable pin output is set to high level when enable is true

Definition at line 208 of file i2c_application_system_stm32.c.

◆ i2c_application_system_set_ready_pin()

void i2c_application_system_set_ready_pin ( bool enable )

Set the ready pin state.

This function is used to set the state of the ready pin

Parameters

[in] enable pin is set to high level when enable is true

Definition at line 181 of file i2c_application_system_stm32.c.

◆ i2c_application_system_setup_generic_gpio_pin()

void i2c_application_system_setup_generic_gpio_pin ( bool enable )

Setup the generic gpio pin.

This function is used to setup the generic gpio pin

Parameters

[in] enable pin is set to output driver when enable is true

Definition at line 188 of file i2c_application_system_stm32.c.

◆ i2c_application_system_test_wakeup_pin()

bool i2c_application_system_test_wakeup_pin ( void )

Check if wakeup pin is high.

This function is used to test if the system should power down

Returns: true if wakeup pin is high

Definition at line 174 of file i2c_application_system_stm32.c.

◆ i2c_application_system_wait_for_interrupt()

void i2c_application_system_wait_for_interrupt ( void )

Wait for interrupt to occur.

Definition at line 169 of file i2c_application_system_stm32.c.

◆ prepare_power_down()

static void prepare_power_down ( void )

inlinestatic

Prepare power down state.

Definition at line 282 of file i2c_application_system_stm32.c.

◆ prepare_register_data()

static void prepare_register_data ( I2C_HandleTypeDef * hi2c )

static

Helper function to prepare transmit of register data.

Parameters

[in] hi2c The I2C handle

Calling this function with wrong parameters will return HAL_ERROR Calling this function when the i2c module is in the wrong state return HAL_BUSY

Definition at line 487 of file i2c_application_system_stm32.c.

◆ resume_power_down()

static void resume_power_down ( void )

inlinestatic

Resume power down state.

Calling this function with wrong parameters will return HAL_ERROR Calling this function when the i2c module is in the wrong state return HAL_BUSY

Definition at line 333 of file i2c_application_system_stm32.c.

◆ rtc_set_next_wakeup_time()

static void rtc_set_next_wakeup_time ( void )

static

Function for setting the next wakeup time from the RTC interrupt.

Definition at line 437 of file i2c_application_system_stm32.c.

◆ rtc_tick_to_time()

static void rtc_tick_to_time	(	uint32_t	tick,
		RTC_TimeTypeDef *	time
	)

static

Convert RTC ticks to RTC time.

Parameters

[in]	tick	rtc ticks in ms
[out]	time	RTC time

Definition at line 416 of file i2c_application_system_stm32.c.

◆ wait_for_i2c_idle()

static void wait_for_i2c_idle ( void )

static

Wait for I2C interface to be idle.

Definition at line 468 of file i2c_application_system_stm32.c.

Variable Documentation

◆ A121_SPI_HANDLE

SPI_HandleTypeDef A121_SPI_HANDLE

◆ gpio_banks

GPIO_TypeDef* gpio_banks[3U] = {GPIOA, GPIOB, GPIOH}

static

Definition at line 54 of file i2c_application_system_stm32.c.

◆ i2c_idle

volatile bool i2c_idle = true

static

Definition at line 57 of file i2c_application_system_stm32.c.

◆ i2c_slave_buffer

uint8_t i2c_slave_buffer[4]

static

Definition at line 56 of file i2c_application_system_stm32.c.

◆ low_power_saved_flatency

uint32_t low_power_saved_flatency

static

Definition at line 52 of file i2c_application_system_stm32.c.

◆ low_power_saved_gpio_bank

gpio_config_t low_power_saved_gpio_bank[3U] = {0}

static

Definition at line 53 of file i2c_application_system_stm32.c.

◆ low_power_saved_rcc_clkinitstruct

RCC_ClkInitTypeDef low_power_saved_rcc_clkinitstruct

static

Definition at line 51 of file i2c_application_system_stm32.c.

◆ low_power_saved_rcc_oscinitstruct

RCC_OscInitTypeDef low_power_saved_rcc_oscinitstruct

static

Definition at line 50 of file i2c_application_system_stm32.c.

◆ MODULE_I2C_HANDLE

I2C_HandleTypeDef MODULE_I2C_HANDLE

◆ MODULE_RTC_HANDLE

RTC_HandleTypeDef MODULE_RTC_HANDLE

◆ MODULE_UART1_HANDLE

UART_HandleTypeDef MODULE_UART1_HANDLE

◆ MODULE_UART2_HANDLE

UART_HandleTypeDef MODULE_UART2_HANDLE

◆ rtc_period_time_ms

uint32_t rtc_period_time_ms = 0

static

Definition at line 59 of file i2c_application_system_stm32.c.

◆ rtc_wakeup_triggered

volatile bool rtc_wakeup_triggered = false

static

Definition at line 60 of file i2c_application_system_stm32.c.

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ GPIO_BANK_COUNT

◆ I2C_ADDRESS_FLOATING

◆ I2C_ADDRESS_HIGH

◆ I2C_ADDRESS_LOW

◆ I2C_SLAVE_BUFFER_SIZE

◆ WAIT_FOR_IDLE_RETRIES

◆ WAIT_FOR_IDLE_RETRY_INTERNAL_MS

Enumeration Type Documentation

◆ pin_state_t

Function Documentation

◆ disable_interrupts()

◆ enable_interrupts()

◆ get_i2c_address()

◆ get_pin_state()

◆ get_rtc_tick()

◆ HAL_I2C_AddrCallback()

◆ HAL_I2C_ErrorCallback()

◆ HAL_I2C_ListenCpltCallback()

◆ HAL_I2C_SlaveRxCpltCallback()

◆ HAL_I2C_SlaveTxCpltCallback()

◆ HAL_RTCEx_AlarmBEventCallback()

◆ i2c_application_enter_low_power_state()

◆ i2c_application_is_periodic_wakeup()

◆ i2c_application_set_periodic_wakeup()

◆ i2c_application_system_init()

◆ i2c_application_system_reset()

◆ i2c_application_system_set_generic_gpio_pin()

◆ i2c_application_system_set_ready_pin()

◆ i2c_application_system_setup_generic_gpio_pin()

◆ i2c_application_system_test_wakeup_pin()

◆ i2c_application_system_wait_for_interrupt()

◆ prepare_power_down()

◆ prepare_register_data()

◆ resume_power_down()

◆ rtc_set_next_wakeup_time()

◆ rtc_tick_to_time()

◆ wait_for_i2c_idle()

Variable Documentation

◆ A121_SPI_HANDLE

◆ gpio_banks

◆ i2c_idle

◆ i2c_slave_buffer

◆ low_power_saved_flatency

◆ low_power_saved_gpio_bank

◆ low_power_saved_rcc_clkinitstruct

◆ low_power_saved_rcc_oscinitstruct

◆ MODULE_I2C_HANDLE

◆ MODULE_RTC_HANDLE

◆ MODULE_UART1_HANDLE

◆ MODULE_UART2_HANDLE

◆ rtc_period_time_ms

◆ rtc_wakeup_triggered