Diff: main.cpp

Revision:

0:7e86fd056d40

Child:

1:e15a9be72b69

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Apr 20 12:12:11 2017 +0000
@@ -0,0 +1,136 @@
+#include "mbed.h"
+
+DigitalOut myled(LED1);
+Serial pc(USBTX, USBRX);
+
+#if defined(TARGET_LPC1768)
+I2C _i2c(p9, p10);
+#elif defined(TARGET_LPC1114)
+I2C _i2c(dp5, dp27);
+#else
+I2C _i2c(D14, D15);
+#endif
+
+#define MB85_DENSITY_64K    0x3
+#define MB85_DENSITY_256K   0x5
+#define MB85_DENSITY_512K   0x6
+#define MB85_DENSITY_1M     0x7
+#define MB85_DENSITY_2M     0x8
+#define MB85RC_I2C_ADDRESS  0xA0
+#define I2C_WRITE           0
+#define I2C_READ            1
+
+int read_device_id(char* device_id)
+{
+    char buf;
+
+    buf = MB85RC_I2C_ADDRESS;
+    _i2c.write(0xF8, &buf, 1, true);
+    _i2c.read(0xF9, device_id, 3);
+    
+    return 0;
+}
+
+int read(uint32_t address, char *buf, uint32_t len)
+{
+    char byte_address[2];
+    char i2c_adrs = (MB85RC_I2C_ADDRESS | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    _i2c.read(i2c_adrs, buf, len);
+    
+    return 0;
+}
+
+int write(uint32_t address, char *buf, uint32_t len)
+{
+    char byte_address[2];
+    char i2c_adrs = (MB85RC_I2C_ADDRESS | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    for (uint32_t i = 0; i < len; i++) {
+        _i2c.write(*buf++);
+    }
+
+    return 0;
+}
+
+int write(uint32_t address, char buf)
+{
+    char byte_address[2];
+    char i2c_adrs = (MB85RC_I2C_ADDRESS | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    _i2c.write(buf);
+
+    return 0;
+}
+
+int fill(uint32_t address, uint8_t data, uint32_t len)
+{
+    char byte_address[2];
+    char i2c_adrs = (MB85RC_I2C_ADDRESS | ((address >> 15) & 0x02));
+    
+    byte_address[0] = ((address >> 8) & 0xFF);
+    byte_address[1] = ((address >> 0) & 0xFF);
+    _i2c.write(i2c_adrs, byte_address, 2, true);
+    for (uint32_t i = 0; i < len; i++) {
+        _i2c.write(data);
+    }
+    return 0;
+}
+
+int main() {
+    char buf[16];
+    uint32_t address;
+
+    pc.baud(115200);
+    pc.printf("\nFujitsu MB85RCxxx FRAM test program\n\n");
+    
+    _i2c.frequency(400000);
+    read_device_id(buf);
+        
+    pc.printf("read device ID = 0x%x 0x%x 0x%x\n\n", buf[0], buf[1], buf[2]);
+
+    fill(0, 0, 256);
+
+    for (int i = 0; i < 16; i++) {
+        buf[i] = i;
+    }
+    write(0, buf, 16);
+
+    for (address = 0; address < 0x80; address += 16) {
+        read(address, buf, 16);
+        pc.printf("%08X : ", address);
+        for (int i = 0; i < 16; i++) {
+            pc.printf("%02X ", buf[i]);    
+        }
+        pc.printf("\n");
+    }
+
+    pc.printf("\n");
+    for (address = 0; address < 0x100; address++) {
+        write(address, (uint8_t)address);
+    }
+    for (address = 0; address < 0x100; address += 16) {
+        read(address, buf, 16);
+        pc.printf("%08X : ", address);
+        for (int i = 0; i < 16; i++) {
+            pc.printf("%02X ", buf[i]);    
+        }
+        pc.printf("\n");
+    }
+    
+    while(1) {
+        myled = 1;
+        wait(0.2);
+        myled = 0;
+        wait(0.2);
+    }
+}