1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
#include "wirish.h"
#include "fsmc.h"
#define LED_PIN BOARD_LED_PIN
// System control block registers
#define SCB_BASE (SCB_Reg*)(0xE000ED00)
// This stuff should ultimately get moved to util.h or scb.h or w/e.
// Also in interactive test program and the HardFault IRQ handler.
typedef struct {
volatile uint32 CPUID;
volatile uint32 ICSR;
volatile uint32 VTOR;
volatile uint32 AIRCR;
volatile uint32 SCR;
volatile uint32 CCR;
volatile uint32 SHPR1;
volatile uint32 SHPR2;
volatile uint32 SHPR3;
volatile uint32 SHCRS;
volatile uint32 CFSR;
volatile uint32 HFSR;
uint32 pad1;
volatile uint32 MMAR;
volatile uint32 BFAR;
} SCB_Reg;
SCB_Reg *scb;
uint16 *ptr;
int count = 0;
void setup() {
uint32 id;
scb = (SCB_Reg*)SCB_BASE;
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN,1);
Serial1.begin(9600);
Serial1.println("Hello World!");
Serial1.print("Init... ");
fsmc_native_sram_init();
Serial1.println("Done.");
// Start of channel1 SRAM bank (through to 0x63FFFFFF, though only a chunk
// of this is valid)
ptr = (uint16*)(0x60000000);
Serial1.print("Writing... ");
*ptr = 0x1234;
Serial1.println("Done.");
Serial1.print("Reading... ");
id = *ptr;
Serial1.print("Done: "); // shouldn't be 0xFFFFFFFF
Serial1.println(id,BIN);
Serial1.println("Dumping System Control Block Registers");
Serial1.print("CPUID: ");
id = scb->CPUID;
Serial1.println(id,BIN);
Serial1.print("ICSR: ");
id = scb->ICSR;
Serial1.println(id,BIN);
Serial1.print("CFSR: ");
id = scb->CFSR;
Serial1.println(id,BIN);
Serial1.print("HFSR: ");
id = scb->HFSR;
Serial1.println(id,BIN);
Serial1.print("MMAR: ");
id = scb->MMAR;
Serial1.println(id,BIN);
Serial1.print("BFAR: ");
id = scb->BFAR;
Serial1.println(id,BIN);
Serial1.println("Now testing all memory addresses... (will hardfault at the end)");
delay(3000);
}
void loop() {
toggleLED();
delay(1);
for(int i = 0; i<100; i++) { // modify this to speed things up
count++;
ptr++;
//delay(10); // tweak this to test SRAM resiliance over time
*ptr = (0x0000FFFF & count);
if(*ptr != (0x0000FFFF & count)) {
Serial1.println("ERROR: mismatch, halting");
while(1) { }
}
}
Serial1.print((uint32)(ptr),HEX);
Serial1.print(": ");
Serial1.println(*ptr,BIN);
}
int main(void) {
init();
setup();
while (1) {
loop();
}
return 0;
}
|
