-#if 1\r
/*\r
* FreeRTOS Kernel V10.2.1\r
* Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.\r
#include <metal/led.h>\r
#include <metal/button.h>\r
\r
-\r
/******************************************************************************\r
* This project provides two demo applications. A simple blinky style project,\r
* and a more comprehensive test and demo application. The\r
\r
#warning Also test in QEMU and add instructions above.\r
\r
+/* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,\r
+or 0 to run the more comprehensive test and demo application. */\r
+#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 0\r
+\r
/* Index to first HART (there is only one). */\r
#define mainHART_0 0\r
\r
-/* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,\r
-or 0 to run the more comprehensive test and demo application. */\r
-#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 1\r
+/* Register addresses within the PLIC. */\r
+#define mainPLIC_PENDING_0 ( * ( ( volatile uint32_t * ) 0x0C001000UL ) )\r
+#define mainPLIC_PENDING_1 ( * ( ( volatile uint32_t * ) 0x0C001004UL ) )\r
+#define mainPLIC_ENABLE_0 ( * ( ( volatile uint32_t * ) 0x0C002000UL ) )\r
+#define mainPLIC_ENABLE_1 ( * ( ( volatile uint32_t * ) 0x0C002004UL ) )\r
\r
/*\r
* main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.\r
struct metal_cpu *pxCPU;\r
struct metal_interrupt *pxInterruptController;\r
\r
- /* Initialise the red LED. */\r
- pxLED = metal_led_get_rgb( "LD0", "red" );\r
+ /* Initialise the blue LED. */\r
+ pxLED = metal_led_get_rgb( "LD0", "blue" );\r
configASSERT( pxLED );\r
metal_led_enable( pxLED );\r
metal_led_off( pxLED );\r
pxInterruptController = metal_cpu_interrupt_controller( pxCPU );\r
configASSERT( pxInterruptController );\r
metal_interrupt_init( pxInterruptController );\r
+\r
+ /* Set all interrupt enable bits to 0. */\r
+ mainPLIC_ENABLE_0 = 0UL;\r
+ mainPLIC_ENABLE_1 = 0UL;\r
+\r
+ /* Clear all pending interrupts. */\r
+ mainPLIC_PENDING_0 = 0UL;\r
+ mainPLIC_PENDING_1 = 0UL;\r
}\r
/*-----------------------------------------------------------*/\r
\r
\r
void vAssertCalled( void )\r
{\r
+static struct metal_led *pxRedLED = NULL;\r
+volatile uint32_t ul;\r
+\r
taskDISABLE_INTERRUPTS();\r
- for( ;; );\r
+\r
+ /* Initialise the red LED. */\r
+ pxRedLED = metal_led_get_rgb( "LD0", "red" );\r
+ configASSERT( pxRedLED );\r
+ metal_led_enable( pxRedLED );\r
+ metal_led_off( pxRedLED );\r
+\r
+ /* Flash the red LED to indicate that assert was hit - interrupts are off\r
+ here to prevent any further tick interrupts or context switches, so the\r
+ delay is implemented as a crude loop. */\r
+ for( ;; )\r
+ {\r
+ for( ul = 0; ul < 0x1ffff; ul++ )\r
+ {\r
+ __asm volatile( "nop" );\r
+ }\r
+ metal_led_toggle( pxRedLED );\r
+ }\r
}\r
/*-----------------------------------------------------------*/\r
\r
+volatile uint32_t ulMEPC = 0UL, ulMCAUSE = 0UL, ulPending0Register = 0UL, ulPending1Register = 0UL;\r
+\r
void handle_trap( void )\r
{\r
#warning Not implemented.\r
\r
+ __asm volatile( "csrr %0, mepc" : "=r"( ulMEPC ) );\r
+ __asm volatile( "csrr %0, mcause" : "=r"( ulMCAUSE ) );\r
+ ulPending0Register = mainPLIC_PENDING_0;\r
+ ulPending1Register = mainPLIC_PENDING_1;\r
configASSERT( metal_cpu_get( mainHART_0 ) == 0x00 );\r
}\r
/*-----------------------------------------------------------*/\r
{\r
metal_led_toggle( pxLED );\r
}\r
+/*-----------------------------------------------------------*/\r
\r
-\r
-\r
-\r
-#else\r
-\r
-static void prvSetupTimerInterrupt( void )\r
+void *malloc( size_t xSize )\r
{\r
- int rc, up_cnt, dn_cnt;\r
-\r
- // Setup Timer and its interrupt so we can toggle LEDs on 1s cadence\r
- tmr_intr = metal_cpu_timer_interrupt_controller(pxCPU);\r
- if (tmr_intr == NULL) {\r
- printf("TIMER interrupt controller is null.\n");\r
- return 4;\r
- }\r
- metal_interrupt_init(tmr_intr);\r
- tmr_id = metal_cpu_timer_get_interrupt_id(pxCPU);\r
- rc = metal_interrupt_register_handler(tmr_intr, tmr_id, timer_isr, pxCPU);\r
- if (rc < 0) {\r
- printf("TIMER interrupt handler registration failed\n");\r
- return (rc * -1);\r
- }\r
-\r
- // Lastly CPU interrupt\r
- if (metal_interrupt_enable(pxInterruptController, 0) == -1) {\r
- printf("CPU interrupt enable failed\n");\r
- return 6;\r
- }\r
-\r
- // Red -> Green -> Blue, repeat\r
- while (1) {\r
-\r
- // Turn on RED\r
- wait_for_timer(pxLED);\r
-\r
- // Turn on Green\r
- wait_for_timer(led0_green);\r
-\r
- // Turn on Blue\r
- wait_for_timer(led0_blue);\r
- }\r
-\r
- // return\r
- return 0;\r
+ configASSERT( metal_cpu_get( mainHART_0 ) == 0x00 );\r
+ return NULL;\r
}\r
/*-----------------------------------------------------------*/\r
\r
\r
-#include <stdio.h>\r
-#include <metal/cpu.h>\r
-#include <metal/led.h>\r
-#include <metal/button.h>\r
-#include <metal/switch.h>\r
-\r
-#define RTC_FREQ 32768\r
-\r
-struct metal_cpu *pxCPU;\r
-struct metal_interrupt *pxInterruptController, *tmr_intr;\r
-int tmr_id;\r
-volatile uint32_t timer_isr_flag;\r
-\r
-\r
-void timer_isr (int id, void *data) {\r
-\r
- // Disable Timer interrupt\r
- metal_interrupt_disable(tmr_intr, tmr_id);\r
-\r
- // Flag showing we hit timer isr\r
- timer_isr_flag = 1;\r
-}\r
-\r
-void wait_for_timer(struct metal_led *which_led) {\r
-\r
- // clear global timer isr flag\r
- timer_isr_flag = 0;\r
-\r
- // Turn on desired LED\r
- metal_led_on(which_led);\r
-\r
- // Set timer\r
- metal_cpu_set_mtimecmp(pxCPU, metal_cpu_get_mtime(pxCPU) + RTC_FREQ);\r
-\r
- // Enable Timer interrupt\r
- metal_interrupt_enable(tmr_intr, tmr_id);\r
-\r
- // wait till timer triggers and isr is hit\r
- while (timer_isr_flag == 0){};\r
-\r
- timer_isr_flag = 0;\r
-\r
- // Turn off this LED\r
- metal_led_off(which_led);\r
-}\r
-\r
-\r
-\r
-#endif\r
-\r
-\r
projects / freertos / blobdiff