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x86, galileo: Refactor I2C and GPIO initialization

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This patch revises the I2C and GPIO initialization code to always be
run during platform boot rather than within each process that requires
it.

This patch also revises the gpio-output example to use a pin that is
set as an output by the default pinmux configuration.  Previously, it
used a pin that was set as an output by the pinmux configuration that
is in effect when the OS does not change the pinmux configuration.
This commit is contained in:
Michael LeMay 2016-01-05 23:05:09 -08:00
parent 3e64447631
commit 58874ea25d
10 changed files with 54 additions and 70 deletions
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31
cpu/x86/drivers/quarkX1000/i2c.c
View file

@ -54,6 +54,15 @@ typedef enum {
I2C_DIRECTION_WRITE
} I2C_DIRECTION;
struct quarkX1000_i2c_config {
QUARKX1000_I2C_SPEED speed;
QUARKX1000_I2C_ADDR_MODE addressing_mode;
quarkX1000_i2c_callback cb_rx;
quarkX1000_i2c_callback cb_tx;
quarkX1000_i2c_callback cb_err;
};
struct i2c_internal_data {
struct quarkX1000_i2c_config config;
@ -223,17 +232,15 @@ i2c_isr(void)
return handled;
}
int
quarkX1000_i2c_configure(struct quarkX1000_i2c_config *config)
void
quarkX1000_i2c_configure(QUARKX1000_I2C_SPEED speed,
QUARKX1000_I2C_ADDR_MODE addressing_mode)
{
uint32_t hcnt, lcnt;
uint8_t ic_fs_spklen;
device.config.speed = config->speed;
device.config.addressing_mode = config->addressing_mode;
device.config.cb_rx = config->cb_rx;
device.config.cb_tx = config->cb_tx;
device.config.cb_err = config->cb_err;
device.config.speed = speed;
device.config.addressing_mode = addressing_mode;
if (device.config.speed == QUARKX1000_I2C_SPEED_STANDARD) {
lcnt = I2C_STD_LCNT;
@ -252,8 +259,16 @@ quarkX1000_i2c_configure(struct quarkX1000_i2c_config *config)
/* Clear interrupts. */
read(QUARKX1000_IC_CLR_INTR);
}
return 0;
void
quarkX1000_i2c_set_callbacks(quarkX1000_i2c_callback rx,
quarkX1000_i2c_callback tx,
quarkX1000_i2c_callback err)
{
device.config.cb_rx = rx;
device.config.cb_tx = tx;
device.config.cb_err = err;
}
static int

17
cpu/x86/drivers/quarkX1000/i2c.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -45,17 +45,12 @@ typedef enum {
typedef void (*quarkX1000_i2c_callback)(void);
struct quarkX1000_i2c_config {
QUARKX1000_I2C_SPEED speed;
QUARKX1000_I2C_ADDR_MODE addressing_mode;
quarkX1000_i2c_callback cb_rx;
quarkX1000_i2c_callback cb_tx;
quarkX1000_i2c_callback cb_err;
};
int quarkX1000_i2c_init(void);
int quarkX1000_i2c_configure(struct quarkX1000_i2c_config *config);
void quarkX1000_i2c_configure(QUARKX1000_I2C_SPEED speed,
QUARKX1000_I2C_ADDR_MODE addressing_mode);
void quarkX1000_i2c_set_callbacks(quarkX1000_i2c_callback rx,
quarkX1000_i2c_callback tx,
quarkX1000_i2c_callback err);
int quarkX1000_i2c_is_available(void);
int quarkX1000_i2c_read(uint8_t *buf, uint8_t len, uint16_t addr);

4
examples/galileo/README.md
View file

@ -21,10 +21,10 @@ GPIO
### GPIO Output (EXAMPLE=gpio-output)
This application shows how to use the GPIO driver APIs to manipulate output
pins. This application sets the GPIO 4 pin as output pin and toggles its
pins. This application sets the GPIO 5 pin as output pin and toggles its
state at every half second.
For a visual effect, you should wire shield pin IO1 to a led in a protoboard.
For a visual effect, you should wire shield pin IO2 to a led in a protoboard.
Once the application is running, you should see a blinking LED.
### GPIO Input (EXAMPLE=gpio-input)

15
examples/galileo/gpio-input.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -33,16 +33,13 @@
#include "contiki.h"
#include "sys/ctimer.h"
#include "galileo-pinmux.h"
#include "gpio.h"
#include "i2c.h"
#define PIN_OUTPUT 5
#define PIN_INPUT 6
static uint32_t value;
static struct ctimer timer;
static struct quarkX1000_i2c_config i2c_config;
PROCESS(gpio_input_process, "GPIO Input Process");
AUTOSTART_PROCESSES(&gpio_input_process);
@ -70,16 +67,6 @@ PROCESS_THREAD(gpio_input_process, ev, data)
{
PROCESS_BEGIN();
i2c_config.speed = QUARKX1000_I2C_SPEED_STANDARD;
i2c_config.addressing_mode = QUARKX1000_I2C_ADDR_MODE_7BIT;
quarkX1000_i2c_init();
quarkX1000_i2c_configure(&i2c_config);
/* use default pinmux configuration */
galileo_pinmux_initialize();
quarkX1000_gpio_init();
quarkX1000_gpio_config(PIN_OUTPUT, QUARKX1000_GPIO_OUT);
quarkX1000_gpio_config(PIN_INPUT, QUARKX1000_GPIO_IN);

15
examples/galileo/gpio-interrupt.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -34,14 +34,11 @@
#include "sys/ctimer.h"
#include "gpio.h"
#include "i2c.h"
#include "galileo-pinmux.h"
#define PIN_OUTPUT 5
#define PIN_INTR 6
static struct ctimer timer;
static struct quarkX1000_i2c_config i2c_config;
PROCESS(gpio_interrupt_process, "GPIO Interrupt Process");
AUTOSTART_PROCESSES(&gpio_interrupt_process);
@ -66,16 +63,6 @@ PROCESS_THREAD(gpio_interrupt_process, ev, data)
{
PROCESS_BEGIN();
i2c_config.speed = QUARKX1000_I2C_SPEED_STANDARD;
i2c_config.addressing_mode = QUARKX1000_I2C_ADDR_MODE_7BIT;
quarkX1000_i2c_init();
quarkX1000_i2c_configure(&i2c_config);
/* use default pinmux configuration */
galileo_pinmux_initialize();
quarkX1000_gpio_init();
quarkX1000_gpio_config(PIN_OUTPUT, QUARKX1000_GPIO_OUT);
quarkX1000_gpio_config(PIN_INTR, QUARKX1000_GPIO_INT | QUARKX1000_GPIO_ACTIVE_HIGH | QUARKX1000_GPIO_EDGE);

5
examples/galileo/gpio-output.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -35,7 +35,7 @@
#include "gpio.h"
#define PIN 4 /* IO1 */
#define PIN 5 /* IO2 */
static uint32_t value;
static struct ctimer timer;
@ -57,7 +57,6 @@ PROCESS_THREAD(gpio_output_process, ev, data)
{
PROCESS_BEGIN();
quarkX1000_gpio_init();
quarkX1000_gpio_config(PIN, QUARKX1000_GPIO_OUT);
quarkX1000_gpio_clock_enable();

18
examples/galileo/i2c-LSM9DS0.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -34,7 +34,6 @@
#include "contiki.h"
#include "sys/ctimer.h"
#include "galileo-pinmux.h"
#include "i2c.h"
#define LSM9DS0_I2C_ADDR 0x6A
@ -44,7 +43,6 @@
static uint8_t tx_data = WHO_AM_I_ADDR;
static uint8_t rx_data = 0;
static struct ctimer timer;
static struct quarkX1000_i2c_config cfg;
PROCESS(i2c_lsm9ds0_process, "I2C LSM9DS0 Who Am I Process");
AUTOSTART_PROCESSES(&i2c_lsm9ds0_process);
@ -84,19 +82,7 @@ PROCESS_THREAD(i2c_lsm9ds0_process, ev, data)
{
PROCESS_BEGIN();
cfg.speed = QUARKX1000_I2C_SPEED_STANDARD;
cfg.addressing_mode = QUARKX1000_I2C_ADDR_MODE_7BIT;
quarkX1000_i2c_init();
quarkX1000_i2c_configure(&cfg);
galileo_pinmux_initialize();
cfg.cb_rx = rx;
cfg.cb_tx = tx;
cfg.cb_err = err;
quarkX1000_i2c_configure(&cfg);
quarkX1000_i2c_set_callbacks(rx, tx, err);
ctimer_set(&timer, CLOCK_SECOND * 5, timeout, NULL);

3
platform/galileo/README.md
View file

@ -30,6 +30,9 @@ Device drivers:
* Real-Time Clock (RTC)
* UART
* Ethernet
* I2C
* GPIO (default pinmux configuration is listed in
platform/galileo/drivers/galileo-pinmux.c)
Contiki APIs:
* Clock module

14
platform/galileo/contiki-main.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -34,6 +34,9 @@
#include "contiki-net.h"
#include "cpu.h"
#include "eth-conf.h"
#include "galileo-pinmux.h"
#include "gpio.h"
#include "i2c.h"
#include "interrupt.h"
#include "shared-isr.h"
#include "uart.h"
@ -56,6 +59,15 @@ main(void)
printf("Starting Contiki\n");
quarkX1000_i2c_init();
quarkX1000_i2c_configure(QUARKX1000_I2C_SPEED_STANDARD,
QUARKX1000_I2C_ADDR_MODE_7BIT);
/* use default pinmux configuration */
if(galileo_pinmux_initialize() < 0) {
fprintf(stderr, "Failed to initialize pinmux\n");
}
quarkX1000_gpio_init();
ENABLE_IRQ();
process_init();

2
platform/galileo/drivers/galileo-pinmux.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions