ping pong

uboot-compiler/bm_memread/FreeRTOS/Demo/CORTEX_A72_64-bit_Raspberrypi4/uart/Makefile

@@ -30,6 +30,7 @@ OBJS +=build/interrupt.o
 OBJS +=build/main.o
 OBJS +=build/mmu_cfg.o
 OBJS +=build/uart.o
+OBJS +=build/memory.o
 
 # From ../mmu
 OBJS +=build/mmu.o

uboot-compiler/bm_memread/FreeRTOS/Demo/CORTEX_A72_64-bit_Raspberrypi4/uart/src/main.c

@@ -7,7 +7,7 @@
 #include "timers.h"
 #include "semphr.h"
 
-#include "uart.h"
+#include "memory.h"
 
 /* 
  * Prototypes for the standard FreeRTOS callback/hook functions implemented
@@ -97,10 +97,6 @@ void ledblink(int on)
     
 }
 
-#define SHARED_MEMORY_ADDRESS 0x3F000000
-#define SHARED_MEMORY_ADDRESS2 0x3F001000
-volatile int* shared_memory = (volatile int*) SHARED_MEMORY_ADDRESS;
-volatile int* shared_memory2 = (volatile int*) SHARED_MEMORY_ADDRESS2;
 
 void main(void)
 {
@@ -109,6 +105,9 @@ void main(void)
     uart_puts("\r\n****************************\r\n");
     uart_puts("\r\n    FreeRTOS UART Sample\r\n");
     uart_puts("\r\n****************************\r\n");
+
+    shm_loop();
+    /*
     *shared_memory = 1;
     uart_puts("\r\n Shared memory loc 1 has been set to 1\r\n");
     while(*shared_memory != 0)
@@ -118,6 +117,7 @@ void main(void)
     uart_puts("\r\n Shared memory loc 1 has been set to 0\r\n");
     *shared_memory2 = 1;
     uart_puts("\r\n Shared memory loc 2 has been set to 1\r\n");
+    */
     
 
     xTaskCreate(TaskA, "Task A", 512, NULL, 0x10, &task_a);

uboot-compiler/bm_memread/FreeRTOS/Demo/CORTEX_A72_64-bit_Raspberrypi4/uart/src/memory.c

+#include "memory.h"
+
+void shm_loop()
+{
+    volatile int* shared_memory = (volatile int*) SHARED_MEMORY_ADDRESS;
+    while(1)
+    {
+        if(*shared_memory == 0xFF)
+        {
+            uart_puthex(*(shared_memory + 8));
+            uart_putchar(*(shared_memory + 8));
+            uart_putchar(*(shared_memory + 9));
+            uart_putchar(*(shared_memory + 10));
+            uart_putchar(*(shared_memory + 11));
+            
+            uart_puts("\r\noutput read\r\n");
+            *shared_memory = 0x00;
+        }
+    }
+}
\ No newline at end of file

uboot-compiler/bm_memread/FreeRTOS/Demo/CORTEX_A72_64-bit_Raspberrypi4/uart/src/memory.h

+#include <stddef.h>
+#include <stdint.h>
+
+#include "uart.h"
+
+#define SHARED_MEMORY_ADDRESS 0x3F000000
+
+void shm_loop();
+