Tedd OKANO
SC18IS606: I2C-->SPI protocol bridge test program with EEPROM
Sample code for SC18IS606 class library (using SPI interface EEPROM)
The SC18IS606 : I2C-bus to SPI bridge
This is a EEPROM operation sample code using SC18IS606 class library. Showing how to send/receive data to/from SPI bus through this bridge chip.
Wiring between the mend and the SC18IS606 evaluation board
Revision 0:b947375dee80, committed 2021-07-28
- Comitter:
- okano
- Date:
- Wed Jul 28 02:05:50 2021 +0000
- Commit message:
- test program with EEPROM operation
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SC18IS606.lib Wed Jul 28 02:05:50 2021 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/okano/code/SC18IS606/#436b2c7854e8
--- /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 ] );
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Jul 28 02:05:50 2021 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file