Add MAX11609 voltage monitoring support to RTM Lamp

This commit adds voltage monitoring capability to the RTM Lamp by
introducing the MODULE_MAX11609 module, which integrates with the
max116xx driver.

A new task, vTaskMAX11609, was created to iterate through the SDR table
and measure sensor voltages for entries associated with the MAX11609.
The task identifies relevant sensors by comparing their task_handle to
its own and updates their readout_value field accordingly.

Author: Joao Victor Santos

modules/sdr.c

@@ -106,6 +106,9 @@ void sensor_init( void )
 #ifdef MODULE_MAX6642
     MAX6642_init();
 #endif
+#ifdef MODULE_MAX11609
+    MAX11609_init();
+#endif
 #if defined(MODULE_INA220_CURRENT) || defined(MODULE_INA220_VOLTAGE)
     ina220_init();
 #endif

modules/sensors/CMakeLists.txt

@@ -38,6 +38,11 @@ if (";${TARGET_MODULES};" MATCHES ";INA3221_CURRENT;")
   set(MODULES_FLAGS "${MODULES_FLAGS} -DMODULE_INA3221_CURRENT")
 endif()
 
+if (";${TARGET_MODULES};" MATCHES ";MAX116XX;")
+  set(PROJ_SRCS ${PROJ_SRCS} ${SENSOR_PATH}/max11609.c)
+  set(MODULES_FLAGS "${MODULES_FLAGS} -DMODULE_MAX11609")
+endif()
+
 set(PROJ_SRCS ${PROJ_SRCS} ${SENSOR_PATH} PARENT_SCOPE)
 set(PROJ_HDRS ${PROJ_HDRS} ${SENSOR_PATH} PARENT_SCOPE)
 set(MODULES_FLAGS "${MODULES_FLAGS}" PARENT_SCOPE)

modules/sensors/max11609.c

@@ -0,0 +1,65 @@
+/* FreeRTOS Includes */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "port.h"
+
+/* Project Includes */
+#include "sdr.h"
+#include "task_priorities.h"
+#include "i2c.h"
+#include "i2c_mapping.h"
+#include "max11609.h"
+#include "utils.h"
+#include "uart_debug.h"
+#include "max116xx.h"
+
+TaskHandle_t vTask11609_Handle;
+
+void vTaskMAX11609()
+{
+    max116xx_cfg max11609_cfg = {
+        .ref_sel   = MAX116XX_REF_INT_ON_OUT,
+        .clk_sel   = MAX116XX_CLK_INT,
+        .pol_sel   = MAX116XX_UNIPOLAR,
+        .scan_mode = MAX116XX_SCAN_OFF_SINGLE_CONV,
+        .diff_mode = MAX116XX_SINGLE_ENDED,
+        .channel_sel = 0
+    };
+    const TickType_t update_period = pdMS_TO_TICKS(MAX11609_UPDATE_PERIOD);
+
+    sensor_t * voltage_sensor;
+    int16_t data_voltage[1];
+    mmc_err err;
+
+    for ( ;; ) {
+        /* Iterate through the SDR Table to find all the MAX11609 entries */
+        for ( voltage_sensor = sdr_head; voltage_sensor != NULL; voltage_sensor = voltage_sensor->next) {
+            if ( voltage_sensor->task_handle == NULL ) {
+                continue;
+            }
+            /* Check if this task should update the selected SDR */
+            if ( *(voltage_sensor->task_handle) != xTaskGetCurrentTaskHandle() ) {
+                continue;
+            }
+
+            max11609_cfg.channel_sel = ((SDR_type_01h_t*)voltage_sensor->sdr)->OEM;
+            err = max116xx_set_config(voltage_sensor->chipid, &max11609_cfg);
+            if(err != MMC_OK) continue;
+
+            err = max116xx_read_uni(voltage_sensor->chipid, data_voltage, 1);
+            if (err == MMC_OK)
+            {
+                voltage_sensor->readout_value = (uint16_t)(data_voltage[0] >> 2);
+            }
+
+            sensor_state_check(voltage_sensor);
+            check_sensor_event(voltage_sensor);
+        }
+        vTaskDelay(update_period);
+    }
+}
+
+void MAX11609_init()
+{
+    xTaskCreate(vTaskMAX11609, "MAX11609", 256, (void *) NULL, tskMAX11609SENSOR_PRIORITY, &vTask11609_Handle);
+}

modules/sensors/max11609.h

@@ -0,0 +1,33 @@
+#ifndef MAX11609_
+#define MAX11609_
+
+/**
+ * @brief Rate at which the MAX11609 sensors are read (in ms)
+ */
+#define MAX11609_UPDATE_PERIOD    200
+
+#define MAX11609_CHANNEL_0        0
+#define MAX11609_CHANNEL_1        1
+#define MAX11609_CHANNEL_2        2
+#define MAX11609_CHANNEL_3        3
+#define MAX11609_CHANNEL_4        4
+#define MAX11609_CHANNEL_5        5
+#define MAX11609_CHANNEL_6        6
+#define MAX11609_CHANNEL_7        7
+
+extern TaskHandle_t vTask11609_Handle;
+
+extern const SDR_type_01h_t SDR_MAX11609_12V_HP;
+
+void MAX11609_init( void );
+
+/**
+ * @brief Monitoring task for MAX11609 sensor
+ *
+ * This task unblocks after every #MAX11609_UPDATE_PERIOD ms and updates the read from all the MAX11609 sensors listed in this module's SDR table
+ *
+ * @param Parameters Pointer to parameter list passed to task upon initialization (not used here)
+ */
+void vTaskMAX11609( void* Parameters );
+
+#endif

modules/sensors/sensors.h

@@ -58,4 +58,8 @@
 #include "max6642.h"
 #endif
 
+#ifdef MODULE_MAX11609
+#include "max11609.h"
+#endif
+
 #endif

modules/task_priorities.h

@@ -39,6 +39,7 @@
 #define tskMAX6642SENSOR_PRIORITY       (tskIDLE_PRIORITY+3)
 #define tskINA220SENSOR_PRIORITY        (tskIDLE_PRIORITY+3)
 #define tskINA3221SENSOR_PRIORITY       (tskIDLE_PRIORITY+3)
+#define tskMAX11609SENSOR_PRIORITY      (tskIDLE_PRIORITY+3)
 
 #define tskIPMI_HANDLERS_PRIORITY       (tskIDLE_PRIORITY+4)
 #define tskIPMI_PRIORITY                (tskIDLE_PRIORITY+4)