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[components][SPI][spi-bit-ops]修复可能的异常操作 

* 移除初始化时未进行引脚初始化就进行引脚设置可能导致的异常
* CS引脚配置判断完善
* xfer返回值优化
This commit is contained in:
wdfk-prog 2024-07-02 09:27:13 +08:00 committed by Rbb666
parent d7914defdd
commit 6e7cf3a608
1 changed files with 25 additions and 30 deletions
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55
components/drivers/spi/spi-bit-ops.c
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2006-2023, RT-Thread Development Team
* Copyright (c) 2006-2024, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
@ -423,6 +423,7 @@ rt_ssize_t spi_bit_xfer(struct rt_spi_device *device, struct rt_spi_message *mes
struct rt_spi_bit_ops *ops = obj->ops;
struct rt_spi_configuration *config = &obj->config;
rt_base_t cs_pin = device->cs_pin;
rt_ssize_t length = 0;
RT_ASSERT(device != NULL);
RT_ASSERT(message != NULL);
@ -443,10 +444,17 @@ rt_ssize_t spi_bit_xfer(struct rt_spi_device *device, struct rt_spi_message *mes
#endif
/* take CS */
if (message->cs_take && (cs_pin != PIN_NONE))
if (message->cs_take && !(device->config.mode & RT_SPI_NO_CS) && (cs_pin != PIN_NONE))
{
LOG_I("spi take cs\n");
rt_pin_write(cs_pin, PIN_LOW);
if (device->config.mode & RT_SPI_CS_HIGH)
{
rt_pin_write(cs_pin, PIN_HIGH);
}
else
{
rt_pin_write(cs_pin, PIN_LOW);
}
spi_delay(ops);
/* spi phase */
@ -461,50 +469,41 @@ rt_ssize_t spi_bit_xfer(struct rt_spi_device *device, struct rt_spi_message *mes
{
if (config->data_width <= 8)
{
spi_xfer_3line_data8(ops,
config,
message->send_buf,
message->recv_buf,
message->length);
length = spi_xfer_3line_data8(ops, config, message->send_buf, message->recv_buf, message->length);
}
else if (config->data_width <= 16)
{
spi_xfer_3line_data16(ops,
config,
message->send_buf,
message->recv_buf,
message->length);
length = spi_xfer_3line_data16(ops, config, message->send_buf, message->recv_buf, message->length);
}
}
else
{
if (config->data_width <= 8)
{
spi_xfer_4line_data8(ops,
config,
message->send_buf,
message->recv_buf,
message->length);
length = spi_xfer_4line_data8(ops, config, message->send_buf, message->recv_buf, message->length);
}
else if (config->data_width <= 16)
{
spi_xfer_4line_data16(ops,
config,
message->send_buf,
message->recv_buf,
message->length);
length = spi_xfer_4line_data16(ops, config, message->send_buf, message->recv_buf, message->length);
}
}
/* release CS */
if (message->cs_release && (cs_pin != PIN_NONE))
if (message->cs_take && !(device->config.mode & RT_SPI_NO_CS) && (cs_pin != PIN_NONE))
{
spi_delay(ops);
rt_pin_write(cs_pin, PIN_HIGH);
if (device->config.mode & RT_SPI_CS_HIGH)
{
rt_pin_write(cs_pin, PIN_LOW);
}
else
{
rt_pin_write(cs_pin, PIN_HIGH);
}
LOG_I("spi release cs\n");
}
return message->length;
return length;
}
static const struct rt_spi_ops spi_bit_bus_ops =
@ -522,9 +521,5 @@ rt_err_t rt_spi_bit_add_bus(struct rt_spi_bit_obj *obj,
obj->config.max_hz = 1 * 1000 * 1000;
obj->config.mode = RT_SPI_MASTER | RT_SPI_MSB | RT_SPI_MODE_0;
/* idle status */
if (obj->config.mode & RT_SPI_CPOL) SCLK_H(ops);
else SCLK_L(ops);
return rt_spi_bus_register(&obj->bus, bus_name, &spi_bit_bus_ops);
}