util.c File Reference

#include "util.h"

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Functions
int	is_current (int index)
int	is_low_current (int index)
int	count_channels (int channels[NUM_CHANNELS])
int	read_status (struct rl_status *status)
int	write_status (struct rl_status *status)
int	ceil_div (int n, int d)
void	sig_handler (int signo)
int	read_file_value (char filename[])

Function Documentation

int ceil_div	(	int	n,
		int	d
	)

Integer division with ceiling.

Parameters

n	Numerator
d	Denominator

Returns

Result

Definition at line 116 of file util.c.

Referenced by pru_sample().

int count_channels

(

int

channels[NUM_CHANNELS]

)

Counts the number of channels sampled.

Parameters

channels

Channel array.

Returns

the number of sampled channels.

Definition at line 39 of file util.c.

References CHANNEL_ENABLED, and NUM_CHANNELS.

Referenced by handle_data_buffer(), meter_print_buffer(), pru_sample(), and setup_lead_in().

int is_current

(

int

index

)

Copyright (c) 2016-2017, ETH Zurich, Computer Engineering Group Checks if channel is a current channel.

Parameters

index

Index of channel in array.

Returns

1, if channel is a current, 0 otherwise.

Definition at line 13 of file util.c.

References I1H_INDEX, I1L_INDEX, I2H_INDEX, and I2L_INDEX.

Referenced by meter_print_buffer(), and setup_channels().

int is_low_current

(

int

index

)

Checks if channel is a low range current channel.

Parameters

index

Index of channel in array.

Returns

1, if channel is a low range current, 0 otherwise.

Definition at line 26 of file util.c.

References I1L_INDEX, and I2L_INDEX.

Referenced by setup_channels().

int read_file_value

(

char

filename[]

)

Read a single integer from file.

Parameters

filename

Path to file.

Returns

integer value in the file, FAILURE when failed.

Definition at line 156 of file util.c.

References ERROR, FAILURE, and rl_log().

Referenced by map_pru_memory(), pru_data_setup(), pru_sample(), and unmap_pru_memory().

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int read_status

(

struct rl_status *

status

)

Reads the status of the running measurement from shared memory.

Parameters

status

Pointer to struct array.

Returns

SUCCESS in case of a success, FAILURE otherwise.

Definition at line 56 of file util.c.

References ERROR, FAILURE, rl_log(), SHMEM_PERMISSIONS, SHMEM_STATUS_KEY, and SUCCESS.

Referenced by rl_get_status(), and rl_read_status().

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void sig_handler

(

int

signo

)

Signal handler to catch stop signals.

Parameters

signo

Signal type.

Definition at line 131 of file util.c.

References rl_status::sampling, SAMPLING_OFF, and status.

Referenced by rl_start().

int write_status

(

struct rl_status *

status

)

Writes the status to the shared memory.

Parameters

status

Pointer to struct array.

Returns

SUCCESS in case of a success, FAILURE otherwise.

Definition at line 85 of file util.c.

References ERROR, FAILURE, rl_log(), SHMEM_PERMISSIONS, SHMEM_STATUS_KEY, status, and SUCCESS.

Referenced by hw_close(), hw_init(), and pru_sample().

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