seniordesign-firmware Changeset - e70ab4bd3445

Changeset - e70ab4bd3445

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mkanning@CL-SEC241-10.cedarville.edu - 13 years ago 2012-11-08 11:54:46
mkanning@CL-SEC241-10.cedarville.edu

Finished first pass on SD Card communication

3 files changed with 33 insertions and 51 deletions:

master/master/lib/logger.c

master/master/lib/sd/sd_raw.c

master/master/lib/sd/sd_raw_config.h

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master/master/lib/logger.c

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@@ @@ -13,41 +13,12 @@ @@
 #include "sd/partition.h"
 #include "sd/sd_raw.h"
 #include "sd/sd_raw_config.h"
 #include "logger.h"
 /*
 	//console prompts and responses
  * I implemented an example application providing a simple command prompt which is accessible
  * via the UART at 9600 Baud. With commands similiar to the Unix shell you can browse different
  * directories, read and write files, create new ones and delete them again. Not all commands are
  * available in all software configurations.
  * - <tt>cat \<file\></tt>\n
  *   Writes a hexdump of \<file\> to the terminal.
  * - <tt>cd \<directory\></tt>\n
  *   Changes current working directory to \<directory\>.
  * - <tt>disk</tt>\n
  *   Shows card manufacturer, status, filesystem capacity and free storage space.
  * - <tt>init</tt>\n
  *   Reinitializes and reopens the memory card.
  * - <tt>ls</tt>\n
  *   Shows the content of the current directory.
  * - <tt>mkdir \<directory\></tt>\n
  *   Creates a directory called \<directory\>.
  * - <tt>mv \<file\> \<file_new\></tt>\n
  *   Renames \<file\> to \<file_new\>.
  * - <tt>rm \<file\></tt>\n
  *   Deletes \<file\>.
  * - <tt>sync</tt>\n
  *   Ensures all buffered data is written to the card.
  * - <tt>touch \<file\></tt>\n
  *   Creates \<file\>.
  * - <tt>write \<file\> \<offset\></tt>\n
  *   Writes text to \<file\>, starting from \<offset\>. The text is read
  *   from the UART, line by line. Finish with an empty line.
 	//config edits
   * By changing the MCU* variables in the Makefile, you can use other Atmel
   * microcontrollers or different clock speeds. You might also want to change
   * the configuration defines in the files fat_config.h, partition_config.h,
   * sd_raw_config.h and sd-reader_config.h. For example, you could disable
   * write support completely if you only need read support.
@@ @@ -166,13 +137,13 @@ void logger_setup() @@
 			uint8_t data_len;
 			while(1)
+			{
 				/* write text to file !! */
 				if(fat_write_file(fd, (uint8_t*) buffer, data_len) != data_len)
+				{
 					uart_puts_p(PSTR("error writing to file\n"));
+					//uart_puts_p(PSTR("error writing to file\n"));
 					break;
+				}
+			}
 			fat_close_file(fd); //may want to leave file open ??
+		}

master/master/lib/sd/sd_raw.c

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@@ @@ -8,12 +8,13 @@ @@
  * published by the Free Software Foundation.
  */
 #include <string.h>
 #include <avr/io.h>
 #include "sd_raw.h"
 #include "sd_raw_config.h"
 /**
  * \addtogroup sd_raw MMC/SD/SDHC card raw access
+ *
  * This module implements read and write access to MMC, SD
  * and SDHC cards. It serves as a low-level driver for the
@@ @@ -181,21 +182,21 @@ uint8_t sd_raw_init() @@
     configure_pin_ss();
     configure_pin_miso();
     unselect_card();
     /* initialize SPI with lowest frequency; max. 400kHz during identification mode of card */
     SPCR = (0 << SPIE) | /* SPI Interrupt Enable */
            (1 << SPE)  | /* SPI Enable */
            (0 << DORD) | /* Data Order: MSB first */
            (1 << MSTR) | /* Master mode */
            (0 << CPOL) | /* Clock Polarity: SCK low when idle */
            (0 << CPHA) | /* Clock Phase: sample on rising SCK edge */
            (1 << SPR1) | /* Clock Frequency: f_OSC / 128 */
            (1 << SPR0);
     SPSR &= ~(1 << SPI2X); /* No doubled clock frequency */
     SPCR0 = (0 << SPIE0) | /* SPI Interrupt Enable */
            (1 << SPE0)  | /* SPI Enable */
            (0 << DORD0) | /* Data Order: MSB first */
            (1 << MSTR0) | /* Master mode */
            (0 << CPOL0) | /* Clock Polarity: SCK low when idle */
            (0 << CPHA0) | /* Clock Phase: sample on rising SCK edge */
            (1 << SPR10) | /* Clock Frequency: f_OSC / 128 */
            (1 << SPR00);
     SPSR0 &= ~(1 << SPI2X0); /* No doubled clock frequency */
     /* initialization procedure */
     sd_raw_card_type = 0;
     if(!sd_raw_available())
         return 0;
@@ @@ -311,14 +312,14 @@ uint8_t sd_raw_init() @@
+    }
     /* deaddress card */
     unselect_card();
     /* switch to highest SPI frequency possible */
     SPCR &= ~((1 << SPR1) | (1 << SPR0)); /* Clock Frequency: f_OSC / 4 */
     SPSR |= (1 << SPI2X); /* Doubled Clock Frequency: f_OSC / 2 */
     SPCR0 &= ~((1 << SPR10) | (1 << SPR00)); /* Clock Frequency: f_OSC / 4 */
     SPSR0 |= (1 << SPI2X0); /* Doubled Clock Frequency: f_OSC / 2 */
 #if !SD_RAW_SAVE_RAM
     /* the first block is likely to be accessed first, so precache it here */
     raw_block_address = (offset_t) -1;
 #if SD_RAW_WRITE_BUFFERING
     raw_block_written = 1;
@@ @@ -358,33 +359,33 @@ uint8_t sd_raw_locked() @@
+ *
  * \param[in] b The byte to sent.
  * \see sd_raw_rec_byte
  */
 void sd_raw_send_byte(uint8_t b)
+{
-    SPDR = b;
+    SPDR0 = b;
     /* wait for byte to be shifted out */
     while(!(SPSR & (1 << SPIF)));
     SPSR &= ~(1 << SPIF);
     while(!(SPSR0 & (1 << SPIF0)));
     SPSR0 &= ~(1 << SPIF0);
+}
 /**
  * \ingroup sd_raw
  * Receives a raw byte from the memory card.
+ *
  * \returns The byte which should be read.
  * \see sd_raw_send_byte
  */
 uint8_t sd_raw_rec_byte()
+{
     /* send dummy data for receiving some */
     SPDR = 0xff;
     while(!(SPSR & (1 << SPIF)));
     SPSR &= ~(1 << SPIF);
     SPDR0 = 0xff;
     while(!(SPSR0 & (1 << SPIF0)));
     SPSR0 &= ~(1 << SPIF0);
-    return SPDR;
+    return SPDR0;
+}
 /**
  * \ingroup sd_raw
  * Send a command to the memory card which responses with a R1 response (and possibly others).
+ *

master/master/lib/sd/sd_raw_config.h

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@@ @@ -103,18 +103,28 @@ extern "C" @@
     #define configure_pin_sck() DDRB |= (1 << DDB1)
     #define configure_pin_ss() DDRB |= (1 << DDB0)
     #define configure_pin_miso() DDRB &= ~(1 << DDB3)
     #define select_card() PORTB &= ~(1 << PORTB0)
     #define unselect_card() PORTB |= (1 << PORTB0)
 #elif defined(__AVR_ATmega164P__) || \
 	  defined(__AVR_ATmega324P__) || \
 	  defined(__AVR_ATmega664P__)
     #define configure_pin_mosi() DDRB |= (1 << DDRB5) //PB5
     #define configure_pin_sck() DDRB |= (1 << DDRB7) //PB7
     #define configure_pin_ss() DDRB |= (1 << DDRB0) //PB0 - custom pin
     #define configure_pin_miso() DDRB &= ~(1 << DDRB6) //PB6
     #define select_card() PORTB &= ~(1 << PORTB0)
     #define unselect_card() PORTB |= (1 << PORTB0)
 #else
-    //#error "no sd/mmc pin mapping available!" //commented out due to build error ??
+    #error "no sd/mmc pin mapping available!" //sends error if micro not specified
 #endif
 #define configure_pin_available() DDRC &= ~(1 << DDC4)
 #define configure_pin_locked() DDRC &= ~(1 << DDC5)
 #define configure_pin_available() DDRC &= ~(1 << DDRC4)
 #define configure_pin_locked() DDRC &= ~(1 << DDRC5)
 #define get_pin_available() (PINC & (1 << PINC4))
 #define get_pin_locked() (PINC & (1 << PINC5))
 #if SD_RAW_SDHC
     typedef uint64_t offset_t;

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