/***************************************************************************//**
* @brief
* Set WRITE ENABLE, Clear UART Tx Buffer, Get Status
*
******************************************************************************/
void write_enable(void)
{
printf("setting write enable\r\n");
serial_tx_flush();
spiflash_set_write_enable(true, NULL, NULL);
printf("write enabled\r\n");
serial_tx_flush();
get_status();
}
/***************************************************************************//**
* @brief
* Read Status Register of Device, Clear UART Tx Buffer
*
******************************************************************************/
void get_status(void)
{
uint8_t status[2];
spiflash_read_status(2, status, NULL, NULL);
printf("status = %02x %02x\r\n", status[0], status[1]);
serial_tx_flush();
}
/*! It will never return */
static int do_testhw_watchdog_reset( int argc, char* argv[] )
{
printf( "Resetting system\n" );
serial_tx_flush();
TriggerWatchdogResetAndWait();
/* never reached */
return 0;
}
/***************************************************************************//**
* @brief
* Serial Output Demo, Prints out Data Wrote and Read back from Device
*
******************************************************************************/
void demo_serial(void)
{
int i;
int hex_dump_size = 256;
CMU_ClockEnable(cmuClock_CORELE, true);
CMU_ClockSelectSet(cmuClock_LFA, cmuSelect_LFXO);
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
serial_init(9600,
raw_serial_rx_buf, sizeof(raw_serial_rx_buf),
raw_serial_tx_buf, sizeof(raw_serial_tx_buf));
printf("\r\nEmbedded Masters SPI Flash Demo\r\n");
if (! spiflash_init(2000000))
{
printf("SPI flash failed to initialize\r\n");
while(true)
;
}
get_status();
printf("reading\r\n");
spiflash_read(0x00000, sizeof(buf1), buf1, NULL, NULL);
printf("read done\r\n");
serial_tx_flush();
printf("data read");
if (hex_dump_size != sizeof(buf1))
printf(", first %d bytes", hex_dump_size);
printf (":\r\n");
hex_dump(buf1, hex_dump_size, 0);
serial_tx_flush();
printf("erasing\r\n");
spiflash_erase(0x00000, sizeof(buf1), 0, true, NULL, NULL);
printf("erase done\r\n");
serial_tx_flush();
get_status();
printf("setting buffer to increment from %02x\r\n", buf1[0]+1);
buf2[0]++;
for (i = 1; i < sizeof(buf2); i++)
buf2[i] = buf2[i-1] + 1;
serial_tx_flush();
write_enable();
printf("setting sector unprotect\r\n");
spiflash_set_sector_protection(false, 0x00000, NULL, NULL);
get_status();
printf("writing\r\n");
serial_tx_flush();
spiflash_write(0x00000, sizeof(buf2), buf2, true, NULL, NULL);
printf("write done\r\n");
serial_tx_flush();
get_status();
printf("reading\r\n");
serial_tx_flush();
spiflash_read(0x00000, sizeof(buf3), buf3, NULL, NULL);
printf("read done\r\n");
serial_tx_flush();
printf("data read");
if (hex_dump_size != sizeof(buf1))
printf(", first %d bytes", hex_dump_size);
printf (":\r\n");
serial_tx_flush();
hex_dump(buf3, hex_dump_size, 0);
spiflash_ultra_deep_power_down(true, NULL, NULL);
serial_tx_flush();
serial_close();
}