*/\r
\r
/*\r
-* This simple demo project runs on the STM32 Discovery board, which is\r
-* populated with an STM32F100RB Cortex-M3 microcontroller. The discovery board \r
-* makes an ideal low cost evaluation platform, but the 8K of RAM provided on the\r
-* STM32F100RB does not allow the simple application to demonstrate all of all the \r
-* FreeRTOS kernel features. Therefore, this simple demo only actively \r
-* demonstrates task, queue, timer and interrupt functionality. In addition, the \r
-* demo is configured to include malloc failure, idle and stack overflow hook \r
-* functions.\r
-* \r
-* The idle hook function:\r
-* The idle hook function queries the amount of FreeRTOS heap space that is\r
-* remaining (see vApplicationIdleHook() defined in this file). The demo \r
-* application is configured use 7K or the available 8K of RAM as the FreeRTOS heap.\r
-* Memory is only allocated from this heap during initialisation, and this demo \r
-* only actually uses 1.6K bytes of the configured 7K available - leaving 5.4K \r
-* bytes of heap space unallocated.\r
-* \r
-* The main() Function:\r
-* main() creates one software timer, one queue, and two tasks. It then starts the\r
-* scheduler.\r
-* \r
-* The Queue Send Task:\r
-* The queue send task is implemented by the prvQueueSendTask() function in this \r
-* file. prvQueueSendTask() sits in a loop that causes it to repeatedly block for \r
-* 200 milliseconds, before sending the value 100 to the queue that was created \r
-* within main(). Once the value is sent, the task loops back around to block for\r
-* another 200 milliseconds.\r
-* \r
-* The Queue Receive Task:\r
-* The queue receive task is implemented by the prvQueueReceiveTask() function\r
-* in this file. prvQueueReceiveTask() sits in a loop that causes repeatedly \r
-* attempt to read data from the queue that was created within main(). When data \r
-* is received, the task checks the value of the data, and if the value equals \r
-* the expected 100, toggles the green LED. The 'block time' parameter passed to \r
-* the queue receive function specifies that the task should be held in the Blocked \r
-* state indefinitely to wait for data to be available on the queue. The queue \r
-* receive task will only leave the Blocked state when the queue send task writes \r
-* to the queue. As the queue send task writes to the queue every 200 \r
-* milliseconds, the queue receive task leaves the Blocked state every 200 \r
-* milliseconds, and therefore toggles the green LED every 200 milliseconds.\r
-* \r
-* The LED Software Timer and the Button Interrupt:\r
-* The user button B1 is configured to generate an interrupt each time it is\r
-* pressed. The interrupt service routine switches the red LED on, and resets the \r
-* LED software timer. The LED timer has a 5000 millisecond (5 second) period, and\r
-* uses a callback function that is defined to just turn the red LED off. \r
-* Therefore, pressing the user button will turn the red LED on, and the LED will \r
-* remain on until a full five seconds pass without the button being pressed.\r
-*/\r
+ * main-blinky.c is included when the "Blinky" build configuration is used.\r
+ * main-full.c is included when the "Full" build configuration is used.\r
+ *\r
+ * main-blinky.c (this file) defines a very simple demo that creates two tasks,\r
+ * one queue, and one timer. It also demonstrates how Cortex-M3 interrupts can\r
+ * interact with FreeRTOS tasks/timers.\r
+ *\r
+ * This simple demo project runs on the SmartFusion A2F-EVAL-KIT evaluation\r
+ * board, which is populated with an A2F200M3F SmartFusion mixed signal FPGA.\r
+ * The A2F200M3F incorporates a Cortex-M3 microcontroller.\r
+ *\r
+ * The idle hook function:\r
+ * The idle hook function demonstrates how to query the amount of FreeRTOS heap\r
+ * space that is remaining (see vApplicationIdleHook() defined in this file).\r
+ *\r
+ * The main() Function:\r
+ * main() creates one software timer, one queue, and two tasks. It then starts\r
+ * the scheduler.\r
+ *\r
+ * The Queue Send Task:\r
+ * The queue send task is implemented by the prvQueueSendTask() function in\r
+ * this file. prvQueueSendTask() sits in a loop that causes it to repeatedly\r
+ * block for 200 milliseconds, before sending the value 100 to the queue that\r
+ * was created within main(). Once the value is sent, the task loops back\r
+ * around to block for another 200 milliseconds.\r
+ *\r
+ * The Queue Receive Task:\r
+ * The queue receive task is implemented by the prvQueueReceiveTask() function\r
+ * in this file. prvQueueReceiveTask() sits in a loop that causes it to\r
+ * repeatedly attempt to read data from the queue that was created within\r
+ * main(). When data is received, the task checks the value of the data, and\r
+ * if the value equals the expected 100, toggles the green LED. The 'block\r
+ * time' parameter passed to the queue receive function specifies that the task\r
+ * should be held in the Blocked state indefinitely to wait for data to be\r
+ * available on the queue. The queue receive task will only leave the Blocked\r
+ * state when the queue send task writes to the queue. As the queue send task\r
+ * writes to the queue every 200 milliseconds, the queue receive task leaves\r
+ * the Blocked state every 200 milliseconds, and therefore toggles the LED\r
+ * every 200 milliseconds.\r
+ *\r
+ * The LED Software Timer and the Button Interrupt:\r
+ * The user button SW1 is configured to generate an interrupt each time it is\r
+ * pressed. The interrupt service routine switches an LED on, and resets the\r
+ * LED software timer. The LED timer has a 5000 millisecond (5 second) period,\r
+ * and uses a callback function that is defined to just turn the LED off again.\r
+ * Therefore, pressing the user button will turn the LED on, and the LED will\r
+ * remain on until a full five seconds pass without the button being pressed.\r
+ */\r
\r
/* Kernel includes. */\r
#include "FreeRTOS.h"\r
the queue empty. */\r
#define mainQUEUE_LENGTH ( 1 )\r
\r
+/* The LED toggle by the queue receive task. */\r
#define mainTASK_CONTROLLED_LED 0x01UL\r
+\r
+/* The LED turned on by the button interrupt, and turned off by the LED timer. */\r
#define mainTIMER_CONTROLLED_LED 0x02UL\r
+\r
/*-----------------------------------------------------------*/\r
\r
/*\r
static void prvQueueSendTask( void *pvParameters );\r
\r
/*\r
- * The LED timer callback function. This does nothing but switch the red LED \r
- * off.\r
+ * The LED timer callback function. This does nothing but switch off the\r
+ * LED defined by the mainTIMER_CONTROLLED_LED constant.\r
*/\r
static void vLEDTimerCallback( xTimerHandle xTimer );\r
\r
function. */\r
static xTimerHandle xLEDTimer = NULL;\r
\r
-volatile unsigned long ulGPIOState = 0UL;\r
+/* Maintains the current LED output state. */\r
+static volatile unsigned long ulGPIOState = 0UL;\r
\r
/*-----------------------------------------------------------*/\r
\r
--- /dev/null
+/*\r
+ Copyright 2001, 2002 Georges Menie (www.menie.org)\r
+ stdarg version contributed by Christian Ettinger\r
+\r
+ This program is free software; you can redistribute it and/or modify\r
+ it under the terms of the GNU Lesser General Public License as published by\r
+ the Free Software Foundation; either version 2 of the License, or\r
+ (at your option) any later version.\r
+\r
+ This program is distributed in the hope that it will be useful,\r
+ but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ GNU Lesser General Public License for more details.\r
+\r
+ You should have received a copy of the GNU Lesser General Public License\r
+ along with this program; if not, write to the Free Software\r
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
+*/\r
+\r
+/*\r
+ putchar is the only external dependency for this file,\r
+ if you have a working putchar, leave it commented out.\r
+ If not, uncomment the define below and\r
+ replace outbyte(c) by your own function call.\r
+\r
+*/\r
+\r
+#define putchar(c) c\r
+\r
+#include <stdarg.h>\r
+\r
+static void printchar(char **str, int c)\r
+{\r
+ //extern int putchar(int c);\r
+ \r
+ if (str) {\r
+ **str = (char)c;\r
+ ++(*str);\r
+ }\r
+ else\r
+ { \r
+ (void)putchar(c);\r
+ }\r
+}\r
+\r
+#define PAD_RIGHT 1\r
+#define PAD_ZERO 2\r
+\r
+static int prints(char **out, const char *string, int width, int pad)\r
+{\r
+ register int pc = 0, padchar = ' ';\r
+\r
+ if (width > 0) {\r
+ register int len = 0;\r
+ register const char *ptr;\r
+ for (ptr = string; *ptr; ++ptr) ++len;\r
+ if (len >= width) width = 0;\r
+ else width -= len;\r
+ if (pad & PAD_ZERO) padchar = '0';\r
+ }\r
+ if (!(pad & PAD_RIGHT)) {\r
+ for ( ; width > 0; --width) {\r
+ printchar (out, padchar);\r
+ ++pc;\r
+ }\r
+ }\r
+ for ( ; *string ; ++string) {\r
+ printchar (out, *string);\r
+ ++pc;\r
+ }\r
+ for ( ; width > 0; --width) {\r
+ printchar (out, padchar);\r
+ ++pc;\r
+ }\r
+\r
+ return pc;\r
+}\r
+\r
+/* the following should be enough for 32 bit int */\r
+#define PRINT_BUF_LEN 12\r
+\r
+static int printi(char **out, int i, int b, int sg, int width, int pad, int letbase)\r
+{\r
+ char print_buf[PRINT_BUF_LEN];\r
+ register char *s;\r
+ register int t, neg = 0, pc = 0;\r
+ register unsigned int u = (unsigned int)i;\r
+\r
+ if (i == 0) {\r
+ print_buf[0] = '0';\r
+ print_buf[1] = '\0';\r
+ return prints (out, print_buf, width, pad);\r
+ }\r
+\r
+ if (sg && b == 10 && i < 0) {\r
+ neg = 1;\r
+ u = (unsigned int)-i;\r
+ }\r
+\r
+ s = print_buf + PRINT_BUF_LEN-1;\r
+ *s = '\0';\r
+\r
+ while (u) {\r
+ t = (unsigned int)u % b;\r
+ if( t >= 10 )\r
+ t += letbase - '0' - 10;\r
+ *--s = (char)(t + '0');\r
+ u /= b;\r
+ }\r
+\r
+ if (neg) {\r
+ if( width && (pad & PAD_ZERO) ) {\r
+ printchar (out, '-');\r
+ ++pc;\r
+ --width;\r
+ }\r
+ else {\r
+ *--s = '-';\r
+ }\r
+ }\r
+\r
+ return pc + prints (out, s, width, pad);\r
+}\r
+\r
+static int print( char **out, const char *format, va_list args )\r
+{\r
+ register int width, pad;\r
+ register int pc = 0;\r
+ char scr[2];\r
+\r
+ for (; *format != 0; ++format) {\r
+ if (*format == '%') {\r
+ ++format;\r
+ width = pad = 0;\r
+ if (*format == '\0') break;\r
+ if (*format == '%') goto out;\r
+ if (*format == '-') {\r
+ ++format;\r
+ pad = PAD_RIGHT;\r
+ }\r
+ while (*format == '0') {\r
+ ++format;\r
+ pad |= PAD_ZERO;\r
+ }\r
+ for ( ; *format >= '0' && *format <= '9'; ++format) {\r
+ width *= 10;\r
+ width += *format - '0';\r
+ }\r
+ if( *format == 's' ) {\r
+ register char *s = (char *)va_arg( args, int );\r
+ pc += prints (out, s?s:"(null)", width, pad);\r
+ continue;\r
+ }\r
+ if( *format == 'd' ) {\r
+ pc += printi (out, va_arg( args, int ), 10, 1, width, pad, 'a');\r
+ continue;\r
+ }\r
+ if( *format == 'x' ) {\r
+ pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'a');\r
+ continue;\r
+ }\r
+ if( *format == 'X' ) {\r
+ pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'A');\r
+ continue;\r
+ }\r
+ if( *format == 'u' ) {\r
+ pc += printi (out, va_arg( args, int ), 10, 0, width, pad, 'a');\r
+ continue;\r
+ }\r
+ if( *format == 'c' ) {\r
+ /* char are converted to int then pushed on the stack */\r
+ scr[0] = (char)va_arg( args, int );\r
+ scr[1] = '\0';\r
+ pc += prints (out, scr, width, pad);\r
+ continue;\r
+ }\r
+ }\r
+ else {\r
+ out:\r
+ printchar (out, *format);\r
+ ++pc;\r
+ }\r
+ }\r
+ if (out) **out = '\0';\r
+ va_end( args );\r
+ return pc;\r
+}\r
+\r
+int printf(const char *format, ...)\r
+{\r
+ va_list args;\r
+ \r
+ va_start( args, format );\r
+ return print( 0, format, args );\r
+}\r
+\r
+int sprintf(char *out, const char *format, ...)\r
+{\r
+ va_list args;\r
+ \r
+ va_start( args, format );\r
+ return print( &out, format, args );\r
+}\r
+\r
+\r
+int snprintf( char *buf, unsigned int count, const char *format, ... )\r
+{\r
+ va_list args;\r
+ \r
+ ( void ) count;\r
+ \r
+ va_start( args, format );\r
+ return print( &buf, format, args );\r
+}\r
+\r
+\r
+#ifdef TEST_PRINTF\r
+int main(void)\r
+{\r
+ char *ptr = "Hello world!";\r
+ char *np = 0;\r
+ int i = 5;\r
+ unsigned int bs = sizeof(int)*8;\r
+ int mi;\r
+ char buf[80];\r
+\r
+ mi = (1 << (bs-1)) + 1;\r
+ printf("%s\n", ptr);\r
+ printf("printf test\n");\r
+ printf("%s is null pointer\n", np);\r
+ printf("%d = 5\n", i);\r
+ printf("%d = - max int\n", mi);\r
+ printf("char %c = 'a'\n", 'a');\r
+ printf("hex %x = ff\n", 0xff);\r
+ printf("hex %02x = 00\n", 0);\r
+ printf("signed %d = unsigned %u = hex %x\n", -3, -3, -3);\r
+ printf("%d %s(s)%", 0, "message");\r
+ printf("\n");\r
+ printf("%d %s(s) with %%\n", 0, "message");\r
+ sprintf(buf, "justif: \"%-10s\"\n", "left"); printf("%s", buf);\r
+ sprintf(buf, "justif: \"%10s\"\n", "right"); printf("%s", buf);\r
+ sprintf(buf, " 3: %04d zero padded\n", 3); printf("%s", buf);\r
+ sprintf(buf, " 3: %-4d left justif.\n", 3); printf("%s", buf);\r
+ sprintf(buf, " 3: %4d right justif.\n", 3); printf("%s", buf);\r
+ sprintf(buf, "-3: %04d zero padded\n", -3); printf("%s", buf);\r
+ sprintf(buf, "-3: %-4d left justif.\n", -3); printf("%s", buf);\r
+ sprintf(buf, "-3: %4d right justif.\n", -3); printf("%s", buf);\r
+\r
+ return 0;\r
+}\r
+\r
+/*\r
+ * if you compile this file with\r
+ * gcc -Wall $(YOUR_C_OPTIONS) -DTEST_PRINTF -c printf.c\r
+ * you will get a normal warning:\r
+ * printf.c:214: warning: spurious trailing `%' in format\r
+ * this line is testing an invalid % at the end of the format string.\r
+ *\r
+ * this should display (on 32bit int machine) :\r
+ *\r
+ * Hello world!\r
+ * printf test\r
+ * (null) is null pointer\r
+ * 5 = 5\r
+ * -2147483647 = - max int\r
+ * char a = 'a'\r
+ * hex ff = ff\r
+ * hex 00 = 00\r
+ * signed -3 = unsigned 4294967293 = hex fffffffd\r
+ * 0 message(s)\r
+ * 0 message(s) with %\r
+ * justif: "left "\r
+ * justif: " right"\r
+ * 3: 0003 zero padded\r
+ * 3: 3 left justif.\r
+ * 3: 3 right justif.\r
+ * -3: -003 zero padded\r
+ * -3: -3 left justif.\r
+ * -3: -3 right justif.\r
+ */\r
+\r
+#endif\r
+\r
+\r
+/* To keep linker happy. */\r
+int write( int i, char* c, int n)\r
+{\r
+ (void)i;\r
+ (void)n;\r
+ (void)c;\r
+ return 0;\r
+}\r
+\r
projects / freertos / commitdiff