Quick start guide for SAM QSPI driver

This is the quick start guide for the SAM QSPI driver, with step-by-step instructions on how to configure and use the driver in a selection of use cases.

The use cases contain several code fragments. The code fragments in the steps for setup can be copied into a custom initialization function, while the steps for usage can be copied into, e.g.the main application function.

Basic use case of the QSPI driver

In this basic use case, the QSPI module are configured for:

• SPI mode
• Serial Memory Mode

Prerequisites

1. System Clock Management (Sysclock)

Setup steps

Example code

Add to application C-file:

void qspi_get_config_default(qspi_config_t * qspi_config)
{
    qspi_config->serial_memory = 1;
    qspi_config->loopback_en = false;
    qspi_config->wait_data_for_transfer = false;
    qspi_config->csmode = 1;
    qspi_config->bits_per_transfer = QSPI_MR_NBBITS_8_BIT;
    qspi_config->min_delay_qcs = 0;
    qspi_config->delay_between_ct = 0;
    qspi_config->clock_polarity = 0;
    qspi_config->clock_phase = 0;
    qspi_config->baudrate = 1000000;
    qspi_config->transfer_delay = 0x40;
    qspi_config->scrambling_en = false;
    qspi_config->scrambling_random_value_dis = false;
    qspi_config->scrambling_user_key = 0;
}

void qspi_initialize(Qspi *qspi, struct qspi_config_t *qspi_config)
{
    qspi_disable(qspi);
    qspi_reset(qspi);
    qspi_set_config(qspi, qspi_config);
    qspi_enable(qspi);
}