Difference between revisions of "Oresat-notes"

Revision as of 22:45, 7 February 2021

Note) Looks like a command shell is realized in code near end of file:

   psas/oresat-firmware/src/f4/app_control/source/command.c

Note) ina226.c and other device type driver source files in 'psas/oresat-firmware/common' give examples of I2C calls in ChibiOS environment.

INA226_SHARED_I2C

References:

  *  https://www.playembedded.org/blog/stm32-i2c-chibios/

Note)  Example file which calls an I2C init function among other things, in routine app_init():

 oresat-firmware/src$ vi ./archive/f0/app_solardemo/main.c

   /*
 * I2C configuration
 */
static const I2CConfig i2cfg1 =
{
    I2C_100KHZ_TIMINGR,
    0,
    0,
};

uint8_t data[8];

static void app_init(void) {
    //=== App initialization

    // Start up debug output
    sdStart(&SD2, &ser_cfg);

    i2cInit();
    i2cStart(&I2CD1, &i2cfg1);

    for (uint8_t i = 0; i < 8; ++i) {
        data[i] = 0;
    }

    canTPDOObjectInit(CAN_PDO_1, CAN_ID_DEFAULT, 0, 0, 8, data);
}

Note)  pointer *devp is of type INA226Driver, where is this defined?

   185 /**
   186  * @brief   Sets INA226 Alert type and value
   187  *
   188  * @param[in] devp       pointer to the @p INA226Driver object
   189  * @param[in] alert_me   the value to write to Mask/Enable register (0 to disable)
   190  * @param[in] alert_lim  the value to write to Alert Limit register
   191  *
   192  * @api
   193  */
   194 void ina226SetAlert(INA226Driver *devp, uint16_t alert_me, uint16_t alert_lim) {
   195     i2cbuf_t buf;
   196 
   197     osalDbgCheck(devp != NULL);
   198     osalDbgAssert(devp->state == INA226_READY,
   199             "ina226SetAlert(), invalid state");

Note) Device states for INA226 enumerated as follows:

:~/projects/psas/oresat-firmware/common/include$ grep -nr -A 2 -B 2 INA226_STOP ./*
./ina226.h-277-typedef enum {
./ina226.h-278-    INA226_UNINIT = 0,                  /**< Not initialized.                 */
./ina226.h:279:    INA226_STOP = 1,                    /**< Stopped.                         */
./ina226.h-280-    INA226_READY = 2,                   /**< Ready.                           */
./ina226.h-281-} ina226_state_t;

^ Virtual Methods Table VMT

     39 #define _base_object_methods                                                \^M
     40   /* Instance offset, used for multiple inheritance, normally zero. It^M
     41      represents the offset between the current object and the container^M
     42      object*/                                                               \^M
     43   size_t instance_offset;^M
     44 ^M