Diff: main.cpp

Revision:

0:b947375dee80

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jul 28 02:05:50 2021 +0000
@@ -0,0 +1,100 @@
+/*
+ *  Operation sample code for SC18IS606 library, using EEPROM (AT25010B)
+ *
+ *  @author     Akifumi (Tedd) OKANO, NXP Semiconductors
+ *  @version    0.2
+ *  @date       28-July-2021
+ *
+ *  SC18IS606 is an "I2C-bus to SPI bridge"
+ *  http://www.nxp.com/ (product infomation page will be updated later)
+ */
+
+#include "mbed.h"
+#include "SC18IS606.h"
+
+I2C         i2c( p28, p27 );
+InterruptIn int_line( p21 );
+SC18IS606   bridge( i2c );
+
+#define I2C_FREQUENCY       (400 * 1000)    //  Hz
+#define SLAVE_SELECT_NUM    1               //  AT25010B is connected to /SS1 pin
+
+#define WRITE_DATA_LENGTH   8                       //  1 or 8 (single byte or page write)
+#define TRANSFER_LENGTH     (2 + WRITE_DATA_LENGTH) //  AT25010B needs command(1 byte), address(1 byte) + data(1 or 8 byte)
+#define READ_DATA_LENGTH    128
+#define RCV_LENGTH          (2 + READ_DATA_LENGTH)  //  AT25010B returnss 2 bytes dummy + data(1 or 8 byte)  
+
+void    data_check( char *data, int length );
+
+volatile int    int_flag    = false;
+
+void int_handler()
+{
+    int_flag    = true;
+}
+
+void wait_transfer_done( void )
+{
+    while ( !int_flag )
+        ;
+
+    bridge.clear_interrupt();
+    int_flag    = false;
+}
+
+void hardware_settings( void )
+{
+    int_line.mode( PullUp );
+    int_line.fall( &int_handler );
+    i2c.frequency( I2C_FREQUENCY );
+}
+
+int main()
+{
+    printf( "SC18IS606 Hello\r\n" );
+
+    hardware_settings();
+    bridge.install_wait_func( wait_transfer_done );
+
+    char    snd_data[ TRANSFER_LENGTH ];
+    char    rcv_data[ RCV_LENGTH ];
+    char    write_enable    = 0x06;
+
+    snd_data[ 0 ]   = 0x02;
+
+    int count   = 0;
+
+    while ( true ) {
+        for ( int d = 0; d < READ_DATA_LENGTH; d += WRITE_DATA_LENGTH ) {
+            snd_data[ 1 ]   = d;
+            for ( int i = 0; i < WRITE_DATA_LENGTH; i++ ) {
+                snd_data[ i + 2 ]  = (count & 0x1) ? ~(d + i) : (d + i);
+            }
+
+            bridge.transfer( SLAVE_SELECT_NUM, &write_enable, sizeof( write_enable ) );
+            bridge.transfer( SLAVE_SELECT_NUM, snd_data, sizeof( snd_data ) );
+
+            wait_ms(1);
+        }
+
+        rcv_data[ 0 ]  = 0x03;
+        rcv_data[ 1 ]  = 0x00;
+
+        bridge.transfer( SLAVE_SELECT_NUM, rcv_data, sizeof( rcv_data ) );
+        bridge.read_buffer( rcv_data, sizeof( rcv_data ) );
+
+        data_check( rcv_data + 2, sizeof( rcv_data ) - 2 );
+        count++;
+    }
+}
+
+
+void data_check( char *data, int length )
+{
+    printf( "\r\ndata_check:" );
+    for ( int i = 0; i < length; i++ ) {
+        if ( !(i % 16) )
+            printf( "\r\n %02X :", i );
+        printf( " %02X", data[ i ] );
+    }
+}