{\r
uint8_t ucVal;\r
\r
- /* Unused parameters. */\r
- ( void ) pvParameters;\r
-\r
- for( ; ; )\r
- {\r
- /* This task has RO access to ucSharedMemory and therefore it can read\r
- * it but cannot modify it. */\r
- ucVal = ucSharedMemory[ 0 ];\r
-\r
- /* Silent compiler warnings about unused variables. */\r
- ( void ) ucVal;\r
-\r
- /* Since this task has Read Only access to the ucSharedMemory region,\r
- * writing to it results in Memory Fault. Set ucROTaskFaultTracker[ 0 ]\r
- * to 1 to tell the Memory Fault Handler that this is an expected fault.\r
- * The handler will recover from this fault gracefully by jumping to the\r
- * next instruction. */\r
- ucROTaskFaultTracker[ 0 ] = 1;\r
-\r
- /* Illegal access to generate Memory Fault. */\r
- ucSharedMemory[ 0 ] = 0;\r
-\r
- /* Wait for a second. */\r
- vTaskDelay( pdMS_TO_TICKS( 1000 ) );\r
- }\r
+ /* Unused parameters. */\r
+ ( void ) pvParameters;\r
+\r
+ for( ; ; )\r
+ {\r
+ /* This task has RO access to ucSharedMemory and therefore it can read\r
+ * it but cannot modify it. */\r
+ ucVal = ucSharedMemory[ 0 ];\r
+\r
+ /* Silent compiler warnings about unused variables. */\r
+ ( void ) ucVal;\r
+\r
+ /* Since this task has Read Only access to the ucSharedMemory region,\r
+ * writing to it results in Memory Fault. Set ucROTaskFaultTracker[ 0 ]\r
+ * to 1 to tell the Memory Fault Handler that this is an expected fault.\r
+ * The handler will recover from this fault gracefully by jumping to the\r
+ * next instruction. */\r
+ ucROTaskFaultTracker[ 0 ] = 1;\r
+\r
+ /* Illegal access to generate Memory Fault. */\r
+ ucSharedMemory[ 0 ] = 0;\r
+\r
+ /* Wait for a second. */\r
+ vTaskDelay( pdMS_TO_TICKS( 1000 ) );\r
+ }\r
}\r
/*-----------------------------------------------------------*/\r
\r
static void prvRWAccessTask( void * pvParameters )\r
{\r
- /* Unused parameters. */\r
- ( void ) pvParameters;\r
-\r
- for( ; ; )\r
- {\r
- /* This task has RW access to ucSharedMemory and therefore can write to\r
- * it. */\r
- ucSharedMemory[ 0 ] = 0;\r
-\r
- /* Wait for a second. */\r
- vTaskDelay( pdMS_TO_TICKS( 1000 ) );\r
- }\r
+ /* Unused parameters. */\r
+ ( void ) pvParameters;\r
+\r
+ for( ; ; )\r
+ {\r
+ /* This task has RW access to ucSharedMemory and therefore can write to\r
+ * it. */\r
+ ucSharedMemory[ 0 ] = 0;\r
+\r
+ /* Wait for a second. */\r
+ vTaskDelay( pdMS_TO_TICKS( 1000 ) );\r
+ }\r
}\r
/*-----------------------------------------------------------*/\r
\r
static StackType_t xRWAccessTaskStack[ configMINIMAL_STACK_SIZE ] __attribute__( ( aligned( 32 ) ) );\r
TaskParameters_t xROAccessTaskParameters =\r
{\r
- .pvTaskCode = prvROAccessTask,\r
- .pcName = "ROAccess",\r
- .usStackDepth = configMINIMAL_STACK_SIZE,\r
- .pvParameters = NULL,\r
- .uxPriority = tskIDLE_PRIORITY,\r
- .puxStackBuffer = xROAccessTaskStack,\r
- .xRegions = {\r
- { ucSharedMemory, 32, tskMPU_REGION_READ_ONLY | tskMPU_REGION_EXECUTE_NEVER },\r
- { ucROTaskFaultTracker, 32, tskMPU_REGION_READ_WRITE | tskMPU_REGION_EXECUTE_NEVER },\r
- { 0, 0, 0 },\r
- }\r
+ .pvTaskCode = prvROAccessTask,\r
+ .pcName = "ROAccess",\r
+ .usStackDepth = configMINIMAL_STACK_SIZE,\r
+ .pvParameters = NULL,\r
+ .uxPriority = tskIDLE_PRIORITY,\r
+ .puxStackBuffer = xROAccessTaskStack,\r
+ .xRegions = {\r
+ { ucSharedMemory, 32, tskMPU_REGION_READ_ONLY | tskMPU_REGION_EXECUTE_NEVER },\r
+ { ucROTaskFaultTracker, 32, tskMPU_REGION_READ_WRITE | tskMPU_REGION_EXECUTE_NEVER },\r
+ { 0, 0, 0 },\r
+ }\r
};\r
TaskParameters_t xRWAccessTaskParameters =\r
{\r
- .pvTaskCode = prvRWAccessTask,\r
- .pcName = "RWAccess",\r
- .usStackDepth = configMINIMAL_STACK_SIZE,\r
- .pvParameters = NULL,\r
- .uxPriority = tskIDLE_PRIORITY,\r
- .puxStackBuffer = xRWAccessTaskStack,\r
- .xRegions = {\r
- { ucSharedMemory, 32, tskMPU_REGION_READ_WRITE | tskMPU_REGION_EXECUTE_NEVER },\r
- { 0, 0, 0 },\r
- { 0, 0, 0 },\r
- }\r
+ .pvTaskCode = prvRWAccessTask,\r
+ .pcName = "RWAccess",\r
+ .usStackDepth = configMINIMAL_STACK_SIZE,\r
+ .pvParameters = NULL,\r
+ .uxPriority = tskIDLE_PRIORITY,\r
+ .puxStackBuffer = xRWAccessTaskStack,\r
+ .xRegions = {\r
+ { ucSharedMemory, 32, tskMPU_REGION_READ_WRITE | tskMPU_REGION_EXECUTE_NEVER },\r
+ { 0, 0, 0 },\r
+ { 0, 0, 0 },\r
+ }\r
};\r
\r
- /* Create an unprivileged task with RO access to ucSharedMemory. */\r
- xTaskCreateRestricted( &( xROAccessTaskParameters ), NULL );\r
+ /* Create an unprivileged task with RO access to ucSharedMemory. */\r
+ xTaskCreateRestricted( &( xROAccessTaskParameters ), NULL );\r
\r
- /* Create an unprivileged task with RW access to ucSharedMemory. */\r
- xTaskCreateRestricted( &( xRWAccessTaskParameters ), NULL );\r
+ /* Create an unprivileged task with RW access to ucSharedMemory. */\r
+ xTaskCreateRestricted( &( xRWAccessTaskParameters ), NULL );\r
}\r
/*-----------------------------------------------------------*/\r
\r
{\r
uint32_t ulPC;\r
\r
- /* Is this an expected fault? */\r
- if( ucROTaskFaultTracker[ 0 ] == 1 )\r
- {\r
- /* Read program counter. */\r
- ulPC = pulFaultStackAddress[ 6 ];\r
-\r
- /* Increment the program counter by 2 to move to the next instruction. */\r
- ulPC += 2;\r
-\r
- /* Save the new program counter on the stack. */\r
- pulFaultStackAddress[ 6 ] = ulPC;\r
-\r
- /* Mark the fault as handled. */\r
- ucROTaskFaultTracker[ 0 ] = 0;\r
- }\r
- else\r
- {\r
- /* This is an unexpected fault - loop forever. */\r
- for( ; ; )\r
- {\r
- }\r
- }\r
+ /* Is this an expected fault? */\r
+ if( ucROTaskFaultTracker[ 0 ] == 1 )\r
+ {\r
+ /* Read program counter. */\r
+ ulPC = pulFaultStackAddress[ 6 ];\r
+\r
+ /* Increment the program counter by 2 to move to the next instruction. */\r
+ ulPC += 2;\r
+\r
+ /* Save the new program counter on the stack. */\r
+ pulFaultStackAddress[ 6 ] = ulPC;\r
+\r
+ /* Mark the fault as handled. */\r
+ ucROTaskFaultTracker[ 0 ] = 0;\r
+ }\r
+ else\r
+ {\r
+ /* This is an unexpected fault - loop forever. */\r
+ for( ; ; )\r
+ {\r
+ }\r
+ }\r
}\r
/*-----------------------------------------------------------*/\r
projects / freertos / blobdiff