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jzlv 2021-04-13 19:23:11 +08:00
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examples/spi/spi_loopback/main.c Normal file
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/**
* @file main.c
* @brief
*
* Copyright (c) 2021 Bouffalolab team
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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 "hal_spi.h"
#include "hal_gpio.h"
#include "hal_dma.h"
#define TRANSFER_LEN 256
static uint32_t txBuff[TRANSFER_LEN] = {0};
static uint32_t rxBuff[TRANSFER_LEN] = {0};
struct device *spi;
uint32_t i;
int main(void)
{
bflb_platform_init(0);
spi_register(SPI0_INDEX, "spi", DEVICE_OFLAG_RDWR);
spi = device_find("spi");
if (spi)
{
device_open(spi, DEVICE_OFLAG_STREAM_TX | DEVICE_OFLAG_STREAM_RX);
}
/* TX buffer init */
for (i = 0; i < TRANSFER_LEN; i++)
{
txBuff[i] = i * 0x1010101;
}
MSG("SPI send and receive data by 32-bit frame size\r\n");
spi_transmit_receive(spi, txBuff, rxBuff, TRANSFER_LEN, 3);
/* Check result */
for (i = 0; i < TRANSFER_LEN; i++)
{
if (rxBuff[i] != txBuff[i])
{
MSG("Received %08x expect %08x\n", rxBuff[i], txBuff[i]);
return ERROR;
}
}
BL702_MemSet4(rxBuff, 0, TRANSFER_LEN);
/* Wait for slave done */
bflb_platform_delay_ms(100);
MSG("SPI send and receive data by 24-bit frame size\r\n");
spi_transmit_receive(spi, txBuff, rxBuff, TRANSFER_LEN, 2);
/* Check result */
for (i = 0; i < TRANSFER_LEN; i++)
{
if (rxBuff[i] != (txBuff[i] & 0xffffff))
{
MSG("Received %08x expect %08x\n", rxBuff[i], txBuff[i] & 0xffffff);
return ERROR;
}
}
BL702_MemSet4(rxBuff, 0, TRANSFER_LEN);
/* Wait for slave done */
bflb_platform_delay_ms(100);
MSG("SPI send and receive data by 16-bit frame size\r\n");
spi_transmit_receive(spi, (uint16_t *)txBuff, (uint16_t *)rxBuff, 2 * TRANSFER_LEN, 1);
/* Check result */
for (i = 0; i < TRANSFER_LEN; i++)
{
if (rxBuff[i] != txBuff[i])
{
MSG("Received %08x expect %08x\r\n", rxBuff[i], txBuff[i]);
return ERROR;
}
}
BL702_MemSet4(rxBuff, 0, TRANSFER_LEN);
/* Wait for slave done */
bflb_platform_delay_ms(100);
MSG("SPI send and receive data by 8-bit frame size\r\n");
spi_transmit_receive(spi, (uint8_t *)txBuff, (uint8_t *)rxBuff, 4 * TRANSFER_LEN, 0);
/* Check result */
for (i = 0; i < TRANSFER_LEN; i++)
{
if (rxBuff[i] != txBuff[i])
{
MSG("Received %08x expect %08x\r\n", rxBuff[i], txBuff[i]);
return ERROR;
}
}
/* Disable spi master mode */
device_close(spi);
while (1)
{
}
}