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Diffstat (limited to 'FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_IAR/main.c')
| -rw-r--r-- | FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_IAR/main.c | 302 |
1 files changed, 302 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_IAR/main.c b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_IAR/main.c new file mode 100644 index 000000000..f7adaedee --- /dev/null +++ b/FreeRTOS/Demo/RISC-V_RV32_SiFive_HiFive1-RevB_IAR/main.c @@ -0,0 +1,302 @@ +/*
+ * FreeRTOS Kernel V10.2.1
+ * Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
+
+/******************************************************************************
+ * This project provides two demo applications. A simple blinky style project,
+ * and a more comprehensive test and demo application. The
+ * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting (defined in this file) is used to
+ * select between the two. The simply blinky demo is implemented and described
+ * in main_blinky.c. The more comprehensive test and demo application is
+ * implemented and described in main_full.c.
+ *
+ * This file implements the code that is not demo specific, including the
+ * hardware setup and standard FreeRTOS hook functions.
+ *
+ * When running on the HiFive Rev B hardware:
+ * When executing correctly the red LED will toggle every three seconds. If
+ * the red LED toggles every 500ms then one of the self-monitoring test tasks
+ * discovered a potential issue. If the red led stops toggling then a hardware
+ * exception occurred or an assert was hit.
+ *
+ * ENSURE TO READ THE DOCUMENTATION PAGE FOR THIS PORT AND DEMO APPLICATION ON
+ * THE http://www.FreeRTOS.org WEB SITE FOR FULL INFORMATION ON USING THIS DEMO
+ * APPLICATION, AND ITS ASSOCIATE FreeRTOS ARCHITECTURE PORT!
+ *
+ */
+
+/* FreeRTOS kernel includes. */
+#include <FreeRTOS.h>
+#include <task.h>
+
+/* Standard includes. */
+#include <stdio.h>
+
+/* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,
+or 0 to run the more comprehensive test and demo application. */
+#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 0
+
+/* UART hardware constants. */
+#define mainUART_BASE_ADDRESS ( *( volatile uint32_t * ) 0x20000000UL )
+#define mainUART_TX_DATA 0x00
+#define mainUART_TX_CTRL 0x08
+#define mainUART_RX_CTRL 0x0c
+#define mainUART_CLOCK_DIV 0x18
+#define mainUART_TX_ENABLE_BIT (1UL << 0UL)
+#define mainUART_RX_ENABLE_BIT (1UL << 0UL)
+#define mainUART_TX_FULL_BIT (1UL << 31UL)
+#define mainUART_REGISTER( offset ) ( ( mainUART_BASE_ADDRESS + offset ) )
+#define mainUART_REGISTER_WORD( offset ) ( *( ( uint32_t * ) mainUART_REGISTER( offset ) ) )
+
+/* Hardware LED specifics. */
+#define mainRED_LED_PIN ( 1UL << 0x16UL )
+#define mainLED_IO_BASE_ADDRESS ( 0x10012000UL )
+#define mainRED_LED_INPUT_ENABLE_REG ( * ( uint32_t * ) ( mainLED_IO_BASE_ADDRESS + 4UL ) )
+#define mainRED_LED_OUTPUT_ENABLE_REG ( * ( uint32_t * ) ( mainLED_IO_BASE_ADDRESS + 8UL ) )
+
+/* Hardware LED specifics. */
+#define mainUART_PINMUX_BASE_ADDRESS ( 0x10012000 )
+#define mainUART0_BASE_ADDRESS 0x10013000UL
+#define mainUART_CLOCK_RATE 16000000UL
+#define mainUART_BAUD_RATE 115200UL
+#define mainUART0_TX_DATA_REG ( * ( uint32_t * ) ( mainUART0_BASE_ADDRESS + 0UL ) )
+#define mainUART0_TX_DATA_BYTE_REG ( * ( uint8_t * ) ( mainUART0_BASE_ADDRESS + 0UL ) )
+#define mainUART0_DIV_REG ( * ( uint32_t * ) ( mainUART0_BASE_ADDRESS + 24UL ) )
+#define mainUART0_TXCTRL_REG ( * ( uint32_t * ) ( mainUART0_BASE_ADDRESS + 8UL ) )
+#define mainUART0_RXCTRL_REG ( * ( uint32_t * ) ( mainUART0_BASE_ADDRESS + 12UL ) )
+#define mainUART0_GPIO_SEL_REG ( * ( uint32_t * ) ( mainUART_PINMUX_BASE_ADDRESS + 60UL ) )
+#define mainUART0_GPIO_SEL_EN ( * ( uint32_t * ) ( mainUART_PINMUX_BASE_ADDRESS + 56UL ) )
+#define mainUART_TXEN_BIT ( 1UL )
+#define mainUART0_PIN ( 0x30000UL )
+
+/* Registers used to initialise the PLIC. */
+#define mainPLIC_PENDING_0 ( * ( ( volatile uint32_t * ) 0x0C001000UL ) )
+#define mainPLIC_PENDING_1 ( * ( ( volatile uint32_t * ) 0x0C001004UL ) )
+#define mainPLIC_ENABLE_0 ( * ( ( volatile uint32_t * ) 0x0C002000UL ) )
+#define mainPLIC_ENABLE_1 ( * ( ( volatile uint32_t * ) 0x0C002004UL ) )
+
+/*-----------------------------------------------------------*/
+
+/*
+ * main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.
+ * main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0.
+ */
+#if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1
+ extern void main_blinky( void );
+#else
+ extern void main_full( void );
+#endif /* #if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1 */
+
+/*
+ * Prototypes for the standard FreeRTOS callback/hook functions implemented
+ * within this file. See https://www.freertos.org/a00016.html
+ */
+void vApplicationMallocFailedHook( void );
+void vApplicationIdleHook( void );
+void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );
+void vApplicationTickHook( void );
+
+/*
+ * Setup the hardware to run this demo.
+ */
+static void prvSetupHardware( void );
+
+/* Simple polling UART send function. */
+void vSendString( const char * const pcString );
+
+/* Toggle the red LED. */
+void vTogglelED( void );
+
+/*-----------------------------------------------------------*/
+
+int main( void )
+{
+ prvSetupHardware();
+
+ /* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top
+ of this file. */
+ #if( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1 )
+ {
+ main_blinky();
+ }
+ #else
+ {
+ main_full();
+ }
+ #endif
+}
+/*-----------------------------------------------------------*/
+
+static void prvSetupHardware( void )
+{
+ /* Set all interrupt enable bits to 0. */
+ mainPLIC_ENABLE_0 = 0UL;
+ mainPLIC_ENABLE_1 = 0UL;
+
+ /* Clear all pending interrupts. */
+ mainPLIC_PENDING_0 = 0UL;
+ mainPLIC_PENDING_1 = 0UL;
+
+ /* Disable Red LED input. */
+ mainRED_LED_INPUT_ENABLE_REG &= ~mainRED_LED_PIN;
+
+ /* Enable Red LED output. */
+ mainRED_LED_OUTPUT_ENABLE_REG |= mainRED_LED_PIN;
+
+ /* Set UART baud rate. */
+ mainUART0_DIV_REG = ( mainUART_CLOCK_RATE / mainUART_BAUD_RATE ) - 1;
+
+ /* Enable UART Tx. */
+ mainUART0_TXCTRL_REG |= mainUART_TXEN_BIT;
+ mainUART0_GPIO_SEL_REG &= mainUART0_PIN;
+ mainUART0_GPIO_SEL_EN |= mainUART0_PIN;
+}
+/*-----------------------------------------------------------*/
+
+void vToggleLED( void )
+{
+static uint32_t ulLEDState = 0;
+
+ if( ulLEDState == 0 )
+ {
+ mainRED_LED_OUTPUT_ENABLE_REG |= mainRED_LED_PIN;
+ }
+ else
+ {
+ mainRED_LED_OUTPUT_ENABLE_REG &= ~mainRED_LED_PIN;
+ }
+ ulLEDState = !ulLEDState;
+}
+/*-----------------------------------------------------------*/
+
+void vSendString( const char * const pcString )
+{
+uint32_t ulIndex = 0;
+
+ /* Crude polling UART Tx. */
+ while( pcString[ ulIndex ] != 0x00 )
+ {
+ while( ( mainUART0_TX_DATA_REG & mainUART_TX_FULL_BIT ) != 0UL );
+ mainUART0_TX_DATA_BYTE_REG = pcString[ ulIndex ];
+ ulIndex++;
+ }
+}
+/*-----------------------------------------------------------*/
+
+void vApplicationMallocFailedHook( void )
+{
+ /* vApplicationMallocFailedHook() will only be called if
+ configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
+ function that will get called if a call to pvPortMalloc() fails.
+ pvPortMalloc() is called internally by the kernel whenever a task, queue,
+ timer or semaphore is created. It is also called by various parts of the
+ demo application. If heap_1.c or heap_2.c are used, then the size of the
+ heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
+ FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
+ to query the size of free heap space that remains (although it does not
+ provide information on how the remaining heap might be fragmented). */
+ taskDISABLE_INTERRUPTS();
+ __asm volatile( "ebreak" );
+ for( ;; );
+}
+/*-----------------------------------------------------------*/
+
+void vApplicationIdleHook( void )
+{
+ /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
+ to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
+ task. It is essential that code added to this hook function never attempts
+ to block in any way (for example, call xQueueReceive() with a block time
+ specified, or call vTaskDelay()). If the application makes use of the
+ vTaskDelete() API function (as this demo application does) then it is also
+ important that vApplicationIdleHook() is permitted to return to its calling
+ function, because it is the responsibility of the idle task to clean up
+ memory allocated by the kernel to any task that has since been deleted. */
+}
+/*-----------------------------------------------------------*/
+
+void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )
+{
+ ( void ) pcTaskName;
+ ( void ) pxTask;
+
+ /* Run time stack overflow checking is performed if
+ configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook
+ function is called if a stack overflow is detected. */
+ taskDISABLE_INTERRUPTS();
+ __asm volatile( "ebreak" );
+ for( ;; );
+}
+/*-----------------------------------------------------------*/
+
+void vApplicationTickHook( void )
+{
+ /* The tests in the full demo expect some interaction with interrupts. */
+ #if( mainCREATE_SIMPLE_BLINKY_DEMO_ONLY != 1 )
+ {
+ extern void vFullDemoTickHook( void );
+ vFullDemoTickHook();
+ }
+ #endif
+}
+/*-----------------------------------------------------------*/
+
+/* Called from the kernel's port layer to handle device specific external
+interrupts. */
+void vApplicationHandleTrap( uint32_t mcause )
+{
+char pcCause[ 20 ];
+
+ /* Not implemented yet. */
+ sprintf( pcCause, "%u", mcause );
+ vSendString( pcCause );
+ configASSERT( mcause == 0 );
+#warning vApplicationHandleTrap not implemented.
+#if 0
+uint32_t ulInterruptNumber;
+typedef void ( * irq_handler_t )( void );
+extern const irq_handler_t isrTable[];
+
+ ulInterruptNumber = PLIC->TARGET[ 0 ].CLAIM_COMPLETE;
+
+ /* Read handler from table. */
+ /* Call handler. */
+
+ PLIC->TARGET[ 0 ].CLAIM_COMPLETE = ulInterruptNumber;
+#endif
+}
+
+/*-----------------------------------------------------------*/
+
+void *malloc( size_t xSize )
+{
+ /* The linker script does not define a heap so artificially force an assert()
+ if something unexpectedly uses the C library heap. See
+ https://www.freertos.org/a00111.html for more information. */
+ configASSERT( xTaskGetTickCount() == 0x00 );
+ return NULL;
+}
+/*-----------------------------------------------------------*/
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