Reading/writing internal flash DA14583

Hello.

We are currently building an application that will require some storage and were hoping that we could use some parts of the internal 1 Mbit flash memory in the DA14583.
Problem is that we can't seem to get the memory to respond.
Currently this is the setup code in the periph_setup.c

// configure internal flash GPIOS
GPIO_ConfigurePin( DA14583_SPI_FLASH_EN_GPIO_PORT, DA14583_SPI_FLASH_EN_GPIO_PIN, OUTPUT, PID_SPI_EN, true );
GPIO_ConfigurePin( DA14583_SPI_FLASH_CLK_GPIO_PORT, DA14583_SPI_FLASH_CLK_GPIO_PIN, OUTPUT, PID_SPI_CLK, false );
GPIO_ConfigurePin( DA14583_SPI_FLASH_DO_GPIO_PORT, DA14583_SPI_FLASH_DO_GPIO_PIN, OUTPUT, PID_SPI_DO, false );
GPIO_ConfigurePin( DA14583_SPI_FLASH_DI_GPIO_PORT, DA14583_SPI_FLASH_DI_GPIO_PIN, INPUT, PID_SPI_DI, false );

cs_pad_param.port = DA14583_SPI_FLASH_EN_GPIO_PORT;
cs_pad_param.pin = DA14583_SPI_FLASH_EN_GPIO_PIN;

// Initialize SPI driver
spi_init(&cs_pad_param, SPI_MODE_8BIT, SPI_ROLE_MASTER, SPI_CLK_IDLE_POL_LOW, SPI_PHA_MODE_0, SPI_MINT_DISABLE, SPI_XTAL_DIV_8);
// Initialize SPI Flash driver
spi_flash_init(DA14583_SPI_FLASH_SIZE, DA14583_SPI_FLASH_PAGE_SIZE);

(taken from one of the example projects)

And then to actually to write and read, this:

uint8_t* buff = "string";
spi_flash_write_data (buff, 0x00,6);
printf("Wrote ! ");
memset(buff,0,6);

spi_flash_read_data(buff,0x00,6);
printf("读:% s r \ n \”,迷);

Also testing the spi_flash_auto_detect() always returns SPI_FLASH_AUTO_DETECT_NOT_DETECTED

So questions:
- Can we read/write the internal flash from code or are we limited to smart snippets?
- If so any ideas as to what we are doing wrong?

//
Jacob