pmic.c

#include "epicardium.h"
#include "modules/modules.h"
#include "modules/log.h"

#include "card10.h"
#include "pmic.h"
#include "MAX77650-Arduino-Library.h"

#include "max32665.h"
#include "mxc_sys.h"
#include "mxc_pins.h"
#include "adc.h"

#include "FreeRTOS.h"
#include "task.h"
#include "timers.h"

#include <stdio.h>
#include <string.h>

#define LOCK_WAIT pdMS_TO_TICKS(1000)

/* Task ID for the pmic handler */
static TaskHandle_t pmic_task_id = NULL;

enum {
	/* An irq was received, probably the power button */
	PMIC_NOTIFY_IRQ = 1,
	/* The timer has ticked and we should check the battery voltage again */
	PMIC_NOTIFY_MONITOR = 2,
};

void pmic_interrupt_callback(void *_)
{
	BaseType_t xHigherPriorityTaskWoken = pdFALSE;
	if (pmic_task_id != NULL) {
		xTaskNotifyFromISR(
			pmic_task_id,
			PMIC_NOTIFY_IRQ,
			eSetBits,
			&xHigherPriorityTaskWoken
		);
		portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
	}
}

int pmic_read_amux(enum pmic_amux_signal sig, float *result)
{
	int ret     = 0;
	int i2c_ret = 0;

	if (sig > _PMIC_AMUX_MAX) {
		return -EINVAL;
	}

	int adc_ret = hwlock_acquire(HWLOCK_ADC, LOCK_WAIT);
	if (adc_ret < 0) {
		ret = adc_ret;
		goto done;
	}
	i2c_ret = hwlock_acquire(HWLOCK_I2C, LOCK_WAIT);
	if (i2c_ret < 0) {
		ret = i2c_ret;
		goto done;
	}

	/* Select the correct channel for this measurement.  */
	MAX77650_setMUX_SEL(sig);

	/*