Merge pull request #34 from oresat/kk60503-patch-1

Fix typos in opd.rst

docs/opd.rst

@@ -2,53 +2,52 @@ OPD (OreSat Power Domain)
 =========================
 
 The OPD allows the C3 to turn other cards on or off, with the exception of the solar cards. The
-solar cards are directly power off the output their solar panels and not the batteries. Yes, the
-battery cards are also on the OPD, as the batteries will work regardless of the whether the card
-is enable or not. Enabling the battery card(s), allows for telemetry from the battery card; i.e.;
+solar cards are directly powered off the output of their solar panels and not the batteries. Yes, the
+battery cards are also on the OPD, as the batteries will work regardless of whether the card
+is enabled or not. Enabling the battery card(s), allows for telemetry from the battery card; i.e.;
 voltage level, charge level, etc.
 
 How It Works
 ------------
 
-Every card, other the solar cards, has a MAX7310  to control giving power to the card.
+Every card, other than the solar cards, has a MAX7310 to control giving power to the card.
 The MAX7310 is 8-pin GPIO expander with an I2C interface.
 
 .. image:: static/opd.jpg
 
 3 of the 8 pins are standardized on all cards to be for Not Fault, Enable, and CB Reset.
 
-- **Not Fault Pin**: Is a input pin. When it is High, the circuit is does not have a fault; when
+- **Not Fault Pin**: Is an input pin. When it is High, the circuit does not have a fault; when
   it is low the circuit has a fault. 
 - **Enable Pin**: Is an output pin. When set High, the card is enabled (powered on). When the pin is
-  set Low, the card is disable (powered off).
+  set Low, the card is disabled (powered off).
 - **CB Reset Pin**: The circuit breaker reset is an output pin. It can reset the enable circuit. When
   held high for a little while, it will hopefully clear the fault.
 
-.. note:: Any pin that is not used is consider a test point and is set low.
+.. note:: Any pin that is not used is considered a test point and is set low.
 
 OPD on STM32 Cards
 ******************
 
-On top of the standard 3 pins, the STM32-based cards also utilizes pins for an I2C bootloader and
+On top of the standard 3 pins, the STM32-based cards also utilize pins for an I2C bootloader and
 enabling a UART connection.
 
 - **I2C SCL Pin**: Is an input pin. Used by I2C bootloader.
 - **I2C SDA Pin**: Is an input pin. Used by I2C bootloader.
 - **Boot Pin**: Is an output pin. When set high before being the Enable pin is set, will put the
-  STM32 into bootloader
-  mode.
-- **UART ENABLE Pin**: Is a output pin. When set high, the cards will be connected to the C3's UART
+  STM32 into bootloader mode.
+- **UART ENABLE Pin**: Is an output pin. When set high, the cards will be connected to the C3's UART
   bus.
 
 OPD on Ocatvo A8 Cards
 **********************
 
-On top of the standard 3 pins, the STM32-based cards also utilizes pins for boot selection pin and
+On top of the standard 3 pins, the STM32-based cards also utilize pins for boot selection pin and
 enabling a UART connection.
 
 - **Boot Pin**: Is an output pin. When set high, the card will boot off of the eMMC; when set low,
   the card will boot off of the SD card.
-- **UART ENABLE Pin**: Is a output pin. When set high, the cards will be connected to the C3's
+- **UART ENABLE Pin**: Is an output pin. When set high, the cards will be connected to the C3's
   UART bus. This will allow the cards eMMC to be reflashed.
 
 OPD State Machine