Programming Tips - Revision history

DavidCary: merge sections

2011-10-19T15:11:13Z

merge sections

DavidCary: /* Flash-emulated EEPROM */

2011-10-19T15:09:22Z

Flash-emulated EEPROM

Tcwden: add links

2009-08-31T08:49:00Z

add links

203.174.44.218: update memory map

2009-08-31T08:24:04Z

update memory map

Tcwden: driver development for dspic33

2009-08-31T07:43:16Z

driver development for dspic33

Show changes

DavidCary: /* Auto baud rate detection */ Is this more specific page a better link?

2009-08-26T13:56:44Z

Auto baud rate detection: Is this more specific page a better link?

DavidCary: /* Auto baud rate detection */ clarified (I hope)

2009-08-26T13:52:56Z

Auto baud rate detection: clarified (I hope)

DavidCary: a little bit of context (I hope this is correct)

2008-08-11T02:56:45Z

a little bit of context (I hope this is correct)

Tcwden at 05:40, 5 August 2008

2008-08-05T05:40:36Z

Tcwden: New page: ==Memory Map for 5011== {| border="1" cellspacing="0" cellpadding="5" |+ Table 6.1 Memory Location ! Type !! Start Address !! End Address !! Size |-valign="top" | Flash || 0x000000 ||0x00A...

2008-08-05T04:56:36Z

New page: ==Memory Map for 5011== {| border="1" cellspacing="0" cellpadding="5" |+ Table 6.1 Memory Location ! Type !! Start Address !! End Address !! Size |-valign="top" | Flash || 0x000000 ||0x00A...

Show changes

@@ Line 288: / Line 288: @@
 this process is called RTSP (run-time self-programming).
-===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/flash_eeprom.c?root=freertos_posix&view=markup Flash-emulated EEPROM]===
+[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/flash_eeprom.c?root=freertos_posix&view=markup Flash-emulated EEPROM]
 *Using built-in functions __builtin_tblpage(), __builtin_tbloffset() to set special-purpose registers to access flash memory
 *Using [http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/rtsp.s?root=freertos_posix&view=markup assembly code] to read and write flash memory.

@@ Line 282: / Line 282: @@
 |}
 ===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/flash_eeprom.c?root=freertos_posix&view=markup Flash-emulated EEPROM]===
@@ Line 287: / Line 292: @@
 *Using [http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/rtsp.s?root=freertos_posix&view=markup assembly code] to read and write flash memory.
 ==DSP Library==

@@ Line 85: / Line 85: @@
-===<asm/types.h>===
+===[http://chungyan5.no-ip.org/vc/trunk/posix/asm-dsPic/types.h?root=freertos_posix&view=markup <asm/types.h>]===
 *The following maps the basic data types:
    typedef unsigned char           __u8;
@@ Line 110: / Line 110: @@
-===Custom Linker Script to Maximize Space for Constant Data===
+===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/dspic33/linker/p33FJ256GP506.gld?root=freertos_posix&view=markup Custom Linker Script to Maximize Space for Constant Data]===
 *Constant data declared using keyword '''const''' will be stored in the .const section in the flash memory.
 *Normally, during compilation, the linker will assign these data after the program code (.text section).
@@ Line 160: / Line 160: @@
-===System Clock===
+===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/dspic33/boot/boot.c?root=freertos_posix&view=markup System Clock]===
 *Each timer is 16-bit (i.e. counting from 0 to 65535).
 *Prescale is the ratio between timer counts and system clock counts. Prescales of 1:1, 1:8, 1:64 and 1:256 are available.
@@ Line 192: / Line 192: @@
-===<asm/system.h>===
+===[http://chungyan5.no-ip.org/vc/trunk/posix/asm-dsPic/system.h?root=freertos_posix&view=markup <asm/system.h>]===
 *Registers are involved in Interrupts includes:
 #Interrupt Flag Status (IFS0-IFS2) registers
@@ Line 209: / Line 209: @@
 ==POSIX System Call and Drivers==
-*POSIX System calls (open(), close(), read(), write(), lseek()) are used to access hardware devices related to data stream.
+*[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/devices.c?root=freertos_posix&view=markup POSIX System Calls] (open(), close(), read(), write(), lseek()) are used to access hardware devices related to data stream.
 *The file descriptor return by open() for these devices are statically assigned at compile time.
-===UART===
+===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/uart.c?root=freertos_posix&view=markup UART]===
 *Serves as the default communication channel for STDIN, STDOUT and STDERR.
 *Implementation of this driver allows transparent operation of printf() in standard C library.
-===I<sup>2</sup>C===
+===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/i2c.c?root=freertos_posix&view=markup I<sup>2</sup>C]===
 *A number of I2C devices can be added using this driver (e.g. I2C DAC, I2C EEPROM, etc)
 *Two lines are devoted for the serial communication. SCL for clock, SDA for data.
@@ Line 232: / Line 232: @@
-===ADC===
+===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/adc.c?root=freertos_posix&view=markup ADC]===
 *12-bit ADC: (Max 18 Channels)
 *ADC uses DMA to buffer the adc data.
@@ Line 238: / Line 238: @@
-===Simple PWM (Output Compare Module)===
+===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/pwm.c?root=freertos_posix&view=markup Simple PWM (Output Compare Module)]===
 *The PWM module consists of 8 channels using the output compare module of dsPic.
 *These channels are locate at pin 46 (OC1), 49 (OC2), 50 (OC3), 51 (OC4), 52 (OC5), 53 (OC6), 54 (OC7), 55 (OC8). These pins are shared with port D.
@@ Line 283: / Line 283: @@
-===Flash-emulated EEPROM===
+===[http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/flash_eeprom.c?root=freertos_posix&view=markup Flash-emulated EEPROM]===
 *Using built-in functions __builtin_tblpage(), __builtin_tbloffset() to set special-purpose registers to access flash memory
-*Using assembly code to read and write flash memory.
+*Using [http://chungyan5.no-ip.org/vc/trunk/demo_posix/dspic/drivers/rtsp.s?root=freertos_posix&view=markup assembly code] to read and write flash memory.
@@ Line 297: / Line 297: @@
 #Transform
 #Control
 ===Data Types===
@@ Line 313: / Line 314: @@
 **Floating point values can be converted to Fractional values using: '''fr = Float2Fract(fo);''' or '''fr = Q15(fo);''' for fo = [-1, 1-2<sup>-15</sup>]
 **Float2Fract() is same as Q15(), except having saturation control. When +ve >= 1, answer = 2<sup>15</sup>-1 = 32767 (0x7FFF). When -ve < -1, answer = -2<sup>15</sup> = -32767 (0x8000)

@@ Line 5: / Line 5: @@
 ===Memory Map for dsPIC33FJ256GP506===
 {| border="1" cellspacing="0" cellpadding="5"
-|+ Table 11.1 Memory Location
+|+
 ! Type !! Start Address !! End Address !! Size
 |-valign="top"
-| Flash || 0x000000 ||0x0157FF || 86K<sup>[1]</sup>
+| Flash || 0x000000 ||0x02ABFF || 171K<sup>[1]</sup>
 |-valign="top"
 | +--Flash: Reset Vector || 0x000000 ||0x000003 || 4
@@ Line 16: / Line 16: @@
 | +--Flash: Alternate Vector Table || 0x000104 ||0x0001FF || 252
 |-valign="top"
-| +--Flash: User Program || 0x000200 ||0x0157FF || 85.5K
+| +--Flash: User Program || 0x000200 ||0x02ABFF || 170.5K
 |-valign="top"
 | Programming Executive || 0x800000 || 0x800FFF || 4K<sup>[1]</sup>
@@ Line 22: / Line 22: @@
 | Config  Registers || 0xF80000 || 0xF80017 || 24
 |-valign="top"
-| Device ID (0xE5) || 0xFF0000 || 0xFF0003 || 4
+| Device ID (0xF5) || 0xFF0000 || 0xFF0003 || 4
 |-
 |}
-[1] Each address is 16-bit wide. Every two addresses correspond to a 24-bit instruction. Each even address contains 2 valid bytes; each odd address contains 1 valid byte plus 1 phathom byte.<br>
+[1] Each address is 16-bit wide. Every two addresses correspond to a 24-bit instruction. Each even address contains 2 valid bytes; each odd address contains 1 valid byte plus 1 fathom byte.<br>
@@ Line 38: / Line 38: @@
 |-valign="top"
 | _XDATA(N) <sup>[1]</sup>
-| RAM Data in X-memory, aligned at N, with initilization
+| RAM Data in X-memory, aligned at N, with initialization
 | int _XDATA(32) xbuf[] = {1, 2, 3, 4, 5};
 |-valign="top"
 | _YBSS(N) <sup>[1]</sup>
-| RAM Data in Y-memory, aligned at N, no initilization
+| RAM Data in Y-memory, aligned at N, no initialization
 | int _YBSS(32) ybuf[16];
 |-valign="top"
 | _YDATA(N) <sup>[1]</sup>
-| RAM Data in Y-memory, aligned at N, with initilization
+| RAM Data in Y-memory, aligned at N, with initialization
 | int _YDATA(32) ybuf[16] = {1, 2, 3, 4, 5};
 |-valign="top"
 | __attribute__((space(const)))
@@ Line 64: / Line 68: @@
 | Flash ROM data, read/write by (psv)
 | int i __attribute__((space(psv)));
 |-valign="top"
 | _PERSISTENT
@@ Line 80: / Line 80: @@
 | Interrupt service rountine
 | void __attribute__((__interrupt__)) _INT0Interrupt(void);
 |-
 |}

@@ Line 206: / Line 206: @@
 *For UART communications compatiable with RS485 standard, an external driver (e.g. DS3695N) is needed.
 ===Auto baud rate detection===
-*The method is provided by [[DsPIC30F 5011 Development Board | ingenia bootloader]].
+*The method is provided by [[Bootloader Development | ingenia bootloader]].
 *The PC sends a ASCII character 'U' (0x55) to the target board.
 *On the first rising edge of the start bit, the target board starts the timer.

@@ Line 206: / Line 206: @@
 *For UART communications compatiable with RS485 standard, an external driver (e.g. DS3695N) is needed.
 ===Auto baud rate detection===
-*The method is provided by [http://www.opencircuits.com/DsPIC30F_5011_Development_Board ingenia bootloader].
+*The method is provided by [[DsPIC30F 5011 Development Board | ingenia bootloader]].
 *The PC sends a ASCII character 'U' (0x55) to the target board.
 *On the first rising edge of the start bit, the target board starts the timer.
@@ Line 213: / Line 213: @@
       _   _   _   _   _   _
     _|S|_|1|_|1|_|1|_|1|_|S|_  (S = Start Bit)
-     <--------------->
+     |               |
      Measured Time
 *The relationship between ''uxbrg'' and ''TMR'' is
@@ Line 259: / Line 260: @@
+    }
 *For 30MIP, tested speeds of transmission include 9600bps, 19200bps, 28800bps, 38400bps and 57600bps.
 ===open()===
 *The following structures and variables are used as circular buffers for transmit and receive.

← Older revision		Revision as of 02:56, 11 August 2008
Line 1:		Line 1:
		+
		+
		+	Some programming tips for the [[DsPIC30F 5011 Development Board]]:
		+
	==Memory Map for 5011==		==Memory Map for 5011==
	{\| border="1" cellspacing="0" cellpadding="5"		{\| border="1" cellspacing="0" cellpadding="5"

← Older revision		Revision as of 05:40, 5 August 2008
Line 1,057:		Line 1,057:
	#Access to table instruction page and offset		#Access to table instruction page and offset
	*Built-in functions are written as C-like function calls to utilize these assembler operators.		*Built-in functions are written as C-like function calls to utilize these assembler operators.
		+
		+
		+	==Address Error==
		+	*Possible Causes
		+	**Misuse of C pointers