Hi.
I am using the MACRONIX MX25L1606E, 16MB flash as the external flash with SPI as an interface to it from the 43341 module.
I am able to repurpose the jedec_id command and I am able to successfully read the JEDEC ID value:
/* Prepare a message to read spi flash JEDEC ID */
/* First segment is a write segment */
segments[0].tx_buffer = &jedec_id_command;
segments[0].length = 1;
segments[0].rx_buffer = NULL;
/* Second segment is a read segment */
segments[1].tx_buffer = NULL;
segments[1].length = 3;
segments[1].rx_buffer = jedec_id_value;
/* Transfer two segments */
wiced_spi_transfer( &wiced_spi_flash, segments, 2 );
I tried to use the same to write some data using program page command (0x02) and read from the same location to confirm. However, wiced_spi_transfer() does not return any error during write or read ...here is the sample code ...
/* ------------------------------------------------------------------------ JEDEC id*/
read_jedec();
/* ------------------------------------------------------------------------ Write Enable */
command = 0x06;
segments[0].tx_buffer = &command;
segments[0].length = 1;
segments[0].rx_buffer = NULL;
/* SPI transfer segment */
wiced_spi_transfer( &wiced_spi_flash, segments, 1);
/* ------------------------------------------------------------------------ Read the status register */
command = 0x05;
segments[0].tx_buffer = &command;
segments[0].length = 1;
segments[0].rx_buffer = NULL;
/* Second segment is a read segment */
segments[1].tx_buffer = NULL;
segments[1].length = 1;
segments[1].rx_buffer = &(command_value[0]);
wiced_spi_transfer( &wiced_spi_flash, segments, 2 );
printf("Read the Status Register value as %u\n", command_value[0]);
/* ------------------------------------------------------------------------ Write Data */
command = 0x02;
command_value[0] = 0x01;
command_value[0] = 0x02;
command_value[0] = 0x03;
memset(data_out, 0, MAX_DATA_OUT);
memset(data_in, 0, MAX_DATA_OUT);
data_out[0] = command;
data_out[1] = 0x07;
data_out[2] = 0x00;
data_out[3] = 0x00;
data_out[4] = 0x01;
data_out[5] = 0x02;
data_out[6] = 0x03;
data_out[7] = 0x04;
segments[0].tx_buffer = data_out;
segments[0].length = 8;
segments[0].rx_buffer = NULL;
result = wiced_spi_transfer( &wiced_spi_flash, segments, 1);
if(result != WICED_SUCCESS) {
printf("Error writing to serial flash\n");
}
/* ------------------------------------------------------------------------ Write Disable */
/* First segment is a write segment */
command = 0x04;
segments[0].tx_buffer = &command;
segments[0].length = 1;
segments[0].rx_buffer = NULL;
/*SPI transfer segment */
wiced_spi_transfer( &wiced_spi_flash, segments, 1);
/* ------------------------------------------------------------------------ Read the status register */
command = 0x05;
segments[0].tx_buffer = &command;
segments[0].length = 1;
segments[0].rx_buffer = NULL;
/* Second segment is a read segment */
segments[1].tx_buffer = NULL;
segments[1].length = 1;
segments[1].rx_buffer = &(command_value[0]);
wiced_spi_transfer( &wiced_spi_flash, segments, 2 );
printf("Read the Status Register value as %u\n", command_value[0]);
/* ------------------------------------------------------------------------ Read */
command = 0x03;
memset(data_out, 0, MAX_DATA_OUT);
memset(data_in, 0, MAX_DATA_OUT);
data_out[0] = command;
data_out[1] = 0x07;
data_out[2] = 0x00;
data_out[3] = 0x00;
segments[0].tx_buffer = data_out;
segments[0].length = 4;
segments[0].rx_buffer = NULL;
/* Second segment is a read segment */
segments[1].tx_buffer = NULL;
segments[1].length = 4;
segments[1].rx_buffer = data_in;
result = wiced_spi_transfer( &wiced_spi_flash, segments, 2 );
if(result != WICED_SUCCESS) {
printf("Error reading from serial flash\n");
}
I have looked at the sample code at libraries/drivers/spi_slave/master/spi_master.c and I wish to repurpose it, however I don't have an SPI slave (as in the External Flash is the SPI slave) and I don't use any of the GPIOs for the data ready pin.
