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/*
* Copyright (c) 2016 Intel Corporation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <zephyr.h>
#include <device.h>
#include <spi.h>
#include <misc/printk.h>
#if (!defined(CONFIG_SPI_QMSI_CS_GPIO) || !defined(CONFIG_SPI_QMSI_CS_GPIO))
#error "This sample requires the GPIO pin as Chip Select feature"
#endif
#if defined(CONFIG_SPI_QMSI_PORT_0_DRV_NAME)
#define SPI_PORT_0 CONFIG_SPI_QMSI_PORT_0_DRV_NAME
#elif defined(CONFIG_SPI_DW_PORT_0_DRV_NAME)
#define SPI_PORT_0 CONFIG_SPI_DW_PORT_0_DRV_NAME
#else
#error "Unknown SPI driver implementation"
#endif
#define W25Q80BL_MANUFACTURER_ID 0x90
static uint8_t rx_buffer[6], tx_buffer[6];
int w25q80bl_read_id(struct device *dev, uint8_t *manufacturer, uint8_t *deviceid)
{
int err;
tx_buffer[0] = W25Q80BL_MANUFACTURER_ID;
err = spi_transceive(dev, tx_buffer, sizeof(tx_buffer),
rx_buffer, sizeof(rx_buffer));
if (err) {
printk("Error during SPI transfer\n");
return DEV_FAIL;
}
if (manufacturer)
*manufacturer = rx_buffer[4];
if (deviceid)
*deviceid = rx_buffer[5];
return 0;
}
int main(void)
{
struct spi_config config = { 0 };
struct device *spi_mst_0 = device_get_binding(SPI_PORT_0);
uint8_t manufacturer, device_id;
int err;
printk("SPI Example application\n");
if (!spi_mst_0)
return DEV_FAIL;
config.config = SPI_MODE_CPOL | SPI_MODE_CPHA | SPI_WORD(8);
config.max_sys_freq = 256;
err = spi_configure(spi_mst_0, &config);
if (err) {
printk("Could not configure SPI device\n");
return DEV_FAIL;
}
err = spi_slave_select(spi_mst_0, 1);
if (err) {
printk("Could not select SPI slave\n");
return DEV_FAIL;
}
err = w25q80bl_read_id(spi_mst_0, &manufacturer, &device_id);
if (err) {
printk("Could not get Manufacturer and Device ID from SPI Flash\n");
return DEV_FAIL;
}
printk("SPI Flash Manufacturer %x Device Id %x\n", manufacturer, device_id);
return DEV_OK;
}
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