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Added interruption feature to the TSL2563 driver

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This commit is contained in:
Antonio Lignan 2016-01-07 00:41:14 +01:00
parent 881e78cb60
commit a8a1ebf8b5
5 changed files with 146 additions and 50 deletions
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1
examples/zolertia/zoul/project-conf.h
View file

@ -39,6 +39,7 @@
#define PROJECT_CONF_H_
#define BROADCAST_CHANNEL 129
#define NETSTACK_CONF_RDC nullrdc_driver
#endif /* PROJECT_CONF_H_ */

31
examples/zolertia/zoul/test-tsl2563.c
View file

@ -48,16 +48,24 @@
#include <stdio.h>
#include "contiki.h"
#include "dev/i2c.h"
#include "dev/leds.h"
#include "dev/tsl2563.h"
/*---------------------------------------------------------------------------*/
/* Default sensor's integration cycle is 402ms */
#define SENSOR_READ_INTERVAL (CLOCK_SECOND/2)
#define SENSOR_READ_INTERVAL (CLOCK_SECOND)
/*---------------------------------------------------------------------------*/
PROCESS(remote_tsl2563_process, "TSL2563 test process");
AUTOSTART_PROCESSES(&remote_tsl2563_process);
/*---------------------------------------------------------------------------*/
static struct etimer et;
/*---------------------------------------------------------------------------*/
void
light_interrupt_callback(uint8_t value)
{
printf("* Light sensor interrupt!\n");
leds_toggle(LEDS_PURPLE);
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(remote_tsl2563_process, ev, data)
{
PROCESS_BEGIN();
@ -69,13 +77,32 @@ PROCESS_THREAD(remote_tsl2563_process, ev, data)
/* Default integration time is 402ms with 1x gain, use the below call to
* change the gain and timming, see tsl2563.h for more options
*/
// tsl2563.configure(TSL2563_TIMMING_CFG, TSL2563_G16X_402MS);
/* tsl2563.configure(TSL2563_TIMMING_CFG, TSL2563_G16X_402MS); */
/* Register the interrupt handler */
TSL2563_REGISTER_INT(light_interrupt_callback);
/* Enable the interrupt source for values over the threshold. The sensor
* compares against the value of CH0, one way to find out the required
* threshold for a given lux quantity is to enable the DEBUG flag and see
* the CH0 value for a given measurement. The other is to reverse the
* calculations done in the calculate_lux() function. The below value roughly
* represents a 2500 lux threshold, same as pointing a flashlight directly
*/
tsl2563.configure(TSL2563_INT_OVER, 0x15B8);
/* And periodically poll the sensor */
while(1) {
etimer_set(&et, SENSOR_READ_INTERVAL);
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
light = tsl2563.value(TSL2563_VAL_READ);
if(light != TSL2563_ERROR) {
printf("Light = %u\n", (uint16_t)light);
} else {
printf("Error, enable the DEBUG flag in the tsl2563 driver for info, ");
printf("or check if the sensor is properly connected\n");
}
}
PROCESS_END();
}

102
platform/zoul/dev/tsl2563.c
View file

@ -47,7 +47,7 @@
#include "lib/sensors.h"
#include "tsl2563.h"
/*---------------------------------------------------------------------------*/
#define DEBUG 1
#define DEBUG 0
#if DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
@ -66,9 +66,9 @@ void (*tsl2563_int_callback)(uint8_t value);
static uint16_t
calculate_lux(uint8_t *buf)
{
uint32_t ch0, ch1 = 0;
uint32_t chscale;
uint32_t ratio, lratio, tmp = 0;
uint32_t ch0, ch1, chscale = 0;
uint32_t ratio = 0;
uint32_t lratio, tmp = 0;
uint16_t buffer[2];
/* The calculations below assume the integration time is 402ms and the gain
@ -208,6 +208,17 @@ tsl2563_off(void)
}
/*---------------------------------------------------------------------------*/
static int
tsl2563_clear_interrupt(void)
{
uint8_t buf = (TSL2563_COMMAND + TSL2563_CLEAR_INTERRUPT);
if(tsl2563_write_reg(&buf, 1) != I2C_MASTER_ERR_NONE) {
PRINTF("TSL2563: failed to clear the interrupt\n");
return TSL2563_ERROR;
}
return TSL2563_SUCCESS;
}
/*---------------------------------------------------------------------------*/
static int
tsl2563_read_sensor(uint16_t *lux)
{
uint8_t buf[4];
@ -217,6 +228,9 @@ tsl2563_read_sensor(uint16_t *lux)
&buf[0], 2) == TSL2563_SUCCESS) {
if(tsl2563_read_reg((TSL2563_COMMAND + TSL2563_D1LOW),
&buf[2], 2) == TSL2563_SUCCESS) {
PRINTF("TSL2563: CH0 0x%02X%02X CH1 0x%02X%02X\n", buf[1], buf[0],
buf[3], buf[2]);
*lux = calculate_lux(buf);
return TSL2563_SUCCESS;
}
@ -231,27 +245,28 @@ PROCESS_THREAD(tsl2563_int_process, ev, data)
{
PROCESS_EXITHANDLER();
PROCESS_BEGIN();
while(1) {
PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_POLL);
/* FIXME: Read interrupt source and clear */
tsl2563_clear_interrupt();
tsl2563_int_callback(0);
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
static void
tsl2563_interrupt_handler(uint8_t port, uint8_t pin)
{
/* FIXME: Check if the interrupt is ours */
/* There's no alert/interruption flag to check, clear the interruption by
* writting to the CLEAR bit in the COMMAND register
*/
process_poll(&tsl2563_int_process);
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
uint8_t buf[2];
uint8_t buf[3];
if((type != TSL2563_ACTIVE) && (type != TSL2563_INT_OVER) &&
(type != TSL2563_INT_BELOW) && (type != TSL2563_INT_DISABLE) &&
@ -269,6 +284,9 @@ configure(int type, int value)
i2c_init(I2C_SDA_PORT, I2C_SDA_PIN, I2C_SCL_PORT, I2C_SCL_PIN,
I2C_SCL_NORMAL_BUS_SPEED);
/* Initialize interrupts handlers */
tsl2563_int_callback = NULL;
/* Power on the sensor and check for the part number */
if(tsl2563_on() == TSL2563_SUCCESS) {
if(tsl2563_id_register(&buf[0]) == TSL2563_SUCCESS) {
@ -280,13 +298,16 @@ configure(int type, int value)
gain = buf[0] & TSL2563_TIMMING_GAIN;
timming = buf[0] & TSL2563_TIMMING_INTEG_MASK;
PRINTF("TSL2563: enabled, timming %u gain %u\n", timming, gain);
/* Clear any pending interrupt */
if(tsl2563_clear_interrupt() == TSL2563_SUCCESS) {
return TSL2563_SUCCESS;
}
}
}
}
}
return TSL2563_ERROR;
} else {
if(tsl2563_off() == TSL2563_SUCCESS) {
PRINTF("TSL2563: stopped\n");
@ -297,8 +318,23 @@ configure(int type, int value)
}
if(type == TSL2563_INT_DISABLE) {
/* FIXME: disable interrupt */
/* Ensure the GPIO doesn't generate more interrupts, this may affect others
* I2C digital sensors using the bus and sharing this pin, so an user may
* comment the line below
*/
GPIO_DISABLE_INTERRUPT(TSL2563_INT_PORT_BASE, TSL2563_INT_PIN_MASK);
/* This also wipes out the persistance value, to be reconfigured when
* enabling back the interruption
*/
buf[0] = (TSL2563_COMMAND + TSL2563_INTERRUPT);
buf[1] = TSL2563_INTR_DISABLED;
if(tsl2563_write_reg(buf, 2) != TSL2563_SUCCESS) {
PRINTF("TSL2563: failed to disable the interrupt\n");
return TSL2563_ERROR;
}
return TSL2563_SUCCESS;
}
@ -338,8 +374,36 @@ configure(int type, int value)
return TSL2563_ERROR;
}
/* Configure interrupt pins and initialize interrupts handlers */
tsl2563_int_callback = NULL;
/* From here we handle the interrupt configuration, it requires the interrupt
* callback handler to have been previously set using the TSL2563_REGISTER_INT
* macro
*/
buf[1] = ((uint8_t *)&value)[0];
buf[2] = ((uint8_t *)&value)[1];
if(type == TSL2563_INT_OVER) {
buf[0] = (TSL2563_COMMAND + TSL2563_THRHIGHLOW);
} else if(type == TSL2563_INT_BELOW) {
buf[0] = (TSL2563_COMMAND + TSL2563_THRLOWLOW);
}
if(tsl2563_write_reg(buf, 3) != TSL2563_SUCCESS) {
PRINTF("TSL2563: failed to set interrupt level\n");
return TSL2563_ERROR;
}
/* Now configure the interruption register (level interrupt, 2 integration
* cycles after threshold has been reached (roughly 804ms if timming is 402ms)
*/
buf[0] = (TSL2563_COMMAND + TSL2563_INTERRUPT);
buf[1] = (TSL2563_INTR_LEVEL << TSL2563_INTR_SHIFT);
buf[1] += TSL2563_INT_PERSIST_2_CYCLES;
if(tsl2563_write_reg(buf, 2) != TSL2563_SUCCESS) {
PRINTF("TSL2563: failed to enable interrupt\n");
return TSL2563_ERROR;
}
/* Configure the interrupts pins */
GPIO_SOFTWARE_CONTROL(TSL2563_INT_PORT_BASE, TSL2563_INT_PIN_MASK);
@ -354,17 +418,17 @@ configure(int type, int value)
/* Spin process until an interrupt is received */
process_start(&tsl2563_int_process, NULL);
if(type == TSL2563_INT_OVER) {
/* FIXME: add code */
} else if(type == TSL2563_INT_BELOW) {
/* FIXME: add code */
}
/* Enable interrupts */
GPIO_ENABLE_INTERRUPT(TSL2563_INT_PORT_BASE, TSL2563_INT_PIN_MASK);
/* The RE-Mote revision A has this pin shared and with a pull-down resistor,
* for other platforms (like the firefly), change to enable pull-up internal
* resistor instead if no external pull-up is present.
*/
ioc_set_over(I2C_INT_PORT, I2C_INT_PIN, IOC_OVERRIDE_PUE);
nvic_interrupt_enable(I2C_INT_VECTOR);
PRINTF("TSL2563: Interrupt configured\n");
return TSL2563_SUCCESS;
}
/*---------------------------------------------------------------------------*/

1
platform/zoul/dev/tsl2563.h
View file

@ -79,6 +79,7 @@
/* -------------------------------------------------------------------------- */
/* Uses the word read/write operation protocol */
#define TSL2563_COMMAND 0xA0
#define TSL2563_CLEAR_INTERRUPT 0x40
/* -------------------------------------------------------------------------- */
#define TSL2563_CONTROL_POWER_ON 0x03
#define TSL2563_CONTROL_POWER_OFF 0x00

3
platform/zoul/firefly/board.h
View file

@ -250,6 +250,9 @@
#define I2C_SCL_PIN 3
#define I2C_SDA_PORT GPIO_C_NUM
#define I2C_SDA_PIN 2
#define I2C_INT_PORT GPIO_D_NUM
#define I2C_INT_PIN 1
#define I2C_INT_VECTOR NVIC_INT_GPIO_PORT_D
/** @} */
/*---------------------------------------------------------------------------*/
/**