Revision 2:47ee605d0830, committed 2018-06-19

Comitter:

poushen

Date:

Tue Jun 19 05:41:52 2018 +0000

Parent:

1:2e18ad95d4ed

Commit message:

add code to demo eeprom access function

Changed in this revision

--- a/eeprom.lib	Sun Jun 17 06:52:12 2018 +0000
+++ b/eeprom.lib	Tue Jun 19 05:41:52 2018 +0000
@@ -1,1 +1,1 @@
-https://os.mbed.com/users/poushen/code/eeprom/#0c876c06b026
+https://os.mbed.com/users/poushen/code/eeprom/#8ddab67b62c3

--- a/main.cpp	Sun Jun 17 06:52:12 2018 +0000
+++ b/main.cpp	Tue Jun 19 05:41:52 2018 +0000
@@ -1,6 +1,8 @@
 #include "mbed.h"
 #include "eeprom.h"
 
+#define BUFFER_SIZE  64
+
 DigitalOut myled(LED2);
 
 // for LPCXpresso LPC1114 board
@@ -10,55 +12,61 @@
 // ** serial port: 9600, 8, N, 1, N
 // *************************************
 //Serial pc(xp9, xp10);
-I2C i2c(dp5, dp27);
+I2C i2c(dp5, dp27);     // for NXP LPC111x
 eeprom epm(i2c);
 
-int main() {
+// import!!! must prefix 3 bytes for memory address
+uint8_t buffer[BUFFER_SIZE + 3]; 
+
+int main()
+{
     myled = 1;
-    printf("LPC1114 demo \r\n");
-    i2c.frequency(1000 * 1000);
-    
-    uint8_t data[13] = { 0, 0, 0, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5};
-    
-    epm.page_write(12288, TWO_BYTES_ADDRESS, data, 10);
+    printf("LPC1114 demo.\n\r");
+
+    // -------- page write --------------------
+    for (int i=0; i<BUFFER_SIZE; i++)
+        buffer[i+3] = i;     // for prefix 3 memory address
+
+    epm.page_write(12288, TWO_BYTES_ADDRESS, buffer, BUFFER_SIZE);
     //wait(0.008);
     epm.ack_polling();
-    
+
+    // -------- current read ------------------
+    printf("below shold be 00 01 ... 3f\n\r");
     epm.write_address(12288, TWO_BYTES_ADDRESS);
-    
-    for (int i=0; i< 64; i++) {
-        printf("%.2x ", epm.current_read());
+
+    for (int i=0; i<BUFFER_SIZE; i++) {
+      printf("%.2x ", epm.current_read());
     }
     printf("\n\r");
     
-    epm.write_address(13312, TWO_BYTES_ADDRESS);
+    // -------- byte write --------------------
+    epm.byte_write(12288, TWO_BYTES_ADDRESS, 0xAA);
+    epm.ack_polling();
     
-    uint8_t buffer[64];
-    epm.sequential_read(buffer, 64);
-    for (int i=0; i<64; i++) {
-        printf("%.2x ", buffer[i]);
+    // -------- sequential read ---------------
+    printf("below shold be aa 01 02 ... 3f\n\r");
+    epm.write_address(12288, TWO_BYTES_ADDRESS);
+  
+    uint8_t data[BUFFER_SIZE];
+    epm.sequential_read(data, BUFFER_SIZE);
+    for (int i=0; i<BUFFER_SIZE; i++) {
+        printf("%.2x ", data[i]);
     }
     printf("\n\r");
-    
+
+    // -------- byte write --------------------
+    epm.byte_write(12289, TWO_BYTES_ADDRESS, 0xBB);
+    epm.ack_polling();
+
+    // -------- random read -------------------
+    printf("below shold be aa bb 02 03 ... 3f\n\r");
     epm.random_read(12288, TWO_BYTES_ADDRESS, buffer, 64);
     for (int i=0; i<64; i++) {
         printf("%.2x ", buffer[i]);
     }
     printf("\n\r");
-    
+
     myled = 0;
-    
-    while (1);
-/*
-    while(1) {
-        myled = 1;
-        printf("led on\n");
-        for (int i=0; i<10000; i++);
-        //wait(1);
-        myled = 0;
-        printf("led off\n");
-        for (int i=0; i<10000; i++);
-        //wait(1);
-    }
-    */
+    while(1);
 }