mirror of https://github.com/RT-Thread/rt-thread
[bsp/IFX]补充缺少的文件 (#8055)
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@ -78,6 +78,7 @@ if GetDepend(['SOC_CY8C6244LQI_S4D92']):
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src += Glob('psoc6cm0p/COMPONENT_CM0P_SLEEP/*.c')
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if GetDepend(['RT_USING_SERIAL']):
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src += ['retarget-io/cy_retarget_io.c']
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src += ['mtb-hal-cat1/source/cyhal_uart.c']
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src += ['mtb-pdl-cat1/drivers/source/cy_scb_uart.c']
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@ -0,0 +1 @@
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docs
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@ -0,0 +1,55 @@
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@ -0,0 +1,38 @@
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# Retarget IO
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### Overview
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A utility library to retarget the standard input/output (STDIO) messages to a UART port. With this library, you can directly print messages on a UART terminal using `printf()`. You can specify the TX pin, RX pin, and the baud rate through the `cy_retarget_io_init()` function. The UART HAL object is externally accessible so that you can use it with other UART HAL functions.
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||||
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**NOTE:** The standard library is not standard in how it treats an I/O stream. Some implement a data buffer by default. The buffer is not flushed until it is full. In that case it may appear that your I/O is not working. You should be aware of how the library buffers data, and you should identify a buffering strategy and buffer size for a specified stream. If you supply a buffer, it must exist until the stream is closed. The following line of code disables the buffer for the standard library that accompanies the GCC compiler:
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||||
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setvbuf( stdin, NULL, _IONBF, 0 );
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**NOTE:** If the application is built using newlib-nano, by default, floating point format strings (%f) are not supported. To enable this support, you must add `-u _printf_float` to the linker command line.
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# RTOS Integration
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To avoid concurrent access to the UART peripheral in a RTOS environment, the ARM and IAR libraries use mutexes to control access to stdio streams. For Newlib (GCC_ARM), the mutex must be implemented in _write() and can be enabled by adding `DEFINES+=CY_RTOS_AWARE` to the Makefile. For all libraries, the program must start the RTOS kernel before calling any stdio functions.
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### Quick Start
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||||
1. Add `#include "cy_retarget_io.h"`
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2. Call `cy_retarget_io_init(CYBSP_DEBUG_UART_TX, CYBSP_DEBUG_UART_RX, CY_RETARGET_IO_BAUDRATE);`
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`CYBSP_DEBUG_UART_TX` and `CYBSP_DEBUG_UART_RX` pins are defined in the BSP and `CY_RETARGET_IO_BAUDRATE` is set to 115200. You can use a different baud rate if you prefer.
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3. Start printing using `printf()`
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### Enabling Conversion of '\\n' into "\r\n"
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If you want to use only '\\n' instead of "\r\n" for printing a new line using printf(), define the macro `CY_RETARGET_IO_CONVERT_LF_TO_CRLF` using the *DEFINES* variable in the application Makefile. The library will then append '\\r' before '\\n' character on the output direction (STDOUT). No conversion occurs if "\r\n" is already present.
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### More information
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||||
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||||
* [API Reference Guide](https://infineon.github.io/retarget-io/html/index.html)
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* [Cypress Semiconductor, an Infineon Technologies Company](http://www.cypress.com)
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||||
* [Infineon GitHub](https://github.com/infineon)
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||||
* [ModusToolbox™](https://www.cypress.com/products/modustoolbox-software-environment)
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||||
* [PSoC™ 6 Code Examples using ModusToolbox™ IDE](https://github.com/infineon/Code-Examples-for-ModusToolbox-Software)
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||||
* [ModusToolbox™ Software](https://github.com/Infineon/modustoolbox-software)
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||||
* [PSoC™ 6 Resources - KBA223067](https://community.cypress.com/docs/DOC-14644)
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||||
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||||
---
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||||
© Cypress Semiconductor Corporation (an Infineon company) or an affiliate of Cypress Semiconductor Corporation, 2019-2021.
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@ -0,0 +1,49 @@
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# Retarget IO
|
||||
|
||||
A utility library to retarget the standard input/output (STDIO) messages to a UART port. With this library, you can directly print messages on a UART terminal using `printf()`.
|
||||
|
||||
### What's Included?
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* printf() support over a UART terminal
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* Support for GCC, IAR, and ARM toolchains
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* Thread safe write for NewLib
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### What Changed?
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#### v1.3.0
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* Added support for checking whether data is being transmitted and waiting until done before finishing the deinit process
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* Added support for using with HAL v1 or v2
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#### v1.2.0
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* Improve error handling
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* Add de-initialization of the mutex to `cy_retarget_io_deinit`
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* Update documentation for integration of the library in a RTOS environment.
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||||
#### v1.1.1
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* Minor update for documentation & branding
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||||
#### v1.1.0
|
||||
* Implemented system I/O retarget functions specific to ARM Compiler 6.
|
||||
* Made _write implementation thread-safe for Newlib.
|
||||
#### v1.0.0
|
||||
* Initial release
|
||||
|
||||
### Supported Software and Tools
|
||||
This version of the Retarget IO was validated for compatibility with the following Software and Tools:
|
||||
|
||||
| Software and Tools | Version |
|
||||
| :--- | :----: |
|
||||
| ModusToolbox™ Software Environment | 2.4.0 |
|
||||
| GCC Compiler | 10.3.1 |
|
||||
| IAR Compiler | 8.4 |
|
||||
| ARM Compiler 6 | 6.11 |
|
||||
|
||||
Minimum required ModusToolbox™ Software Environment: v2.0
|
||||
|
||||
### More information
|
||||
|
||||
* [API Reference Guide](https://infineon.github.io/retarget-io/html/index.html)
|
||||
* [Cypress Semiconductor, an Infineon Technologies Company](http://www.cypress.com)
|
||||
* [Infineon GitHub](https://github.com/infineon)
|
||||
* [ModusToolbox™](https://www.cypress.com/products/modustoolbox-software-environment)
|
||||
* [PSoC™ 6 Code Examples using ModusToolbox™ IDE](https://github.com/infineon/Code-Examples-for-ModusToolbox-Software)
|
||||
* [ModusToolbox™ Software](https://github.com/Infineon/modustoolbox-software)
|
||||
* [PSoC™ 6 Resources - KBA223067](https://community.cypress.com/docs/DOC-14644)
|
||||
|
||||
---
|
||||
© Cypress Semiconductor Corporation (an Infineon company) or an affiliate of Cypress Semiconductor Corporation, 2019-2021.
|
||||
|
|
@ -0,0 +1,603 @@
|
|||
/***************************************************************************//**
|
||||
* \file cy_retarget_io.c
|
||||
*
|
||||
* \brief
|
||||
* Provides APIs for retargeting stdio to UART hardware contained on the Cypress
|
||||
* kits.
|
||||
*
|
||||
********************************************************************************
|
||||
* \copyright
|
||||
* Copyright 2018-2021 Cypress Semiconductor Corporation (an Infineon company) or
|
||||
* an affiliate of Cypress Semiconductor Corporation
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* 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 "cy_retarget_io.h"
|
||||
#include "cyhal_hw_types.h"
|
||||
#include "cyhal_uart.h"
|
||||
#include "cy_utils.h"
|
||||
#include "cyhal_system.h"
|
||||
#include <stdbool.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#if (defined(CY_RTOS_AWARE) || defined(COMPONENT_RTOS_AWARE)) && defined(__GNUC__) && \
|
||||
!defined(__ARMCC_VERSION) && !defined(__clang__)
|
||||
|
||||
// The cyhal_uart driver is not necessarily thread-safe. To avoid concurrent
|
||||
// access, the ARM and IAR libraries use mutexes to control access to stdio
|
||||
// streams. For Newlib, the mutex must be implemented in _write(). For all
|
||||
// libraries, the program must start the RTOS kernel before calling any stdio
|
||||
// functions.
|
||||
|
||||
#include "cyabs_rtos.h"
|
||||
|
||||
static cy_mutex_t cy_retarget_io_mutex;
|
||||
static bool cy_retarget_io_mutex_initialized = false;
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_init
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static cy_rslt_t cy_retarget_io_mutex_init(void)
|
||||
{
|
||||
cy_rslt_t rslt;
|
||||
if (cy_retarget_io_mutex_initialized)
|
||||
{
|
||||
rslt = CY_RSLT_SUCCESS;
|
||||
}
|
||||
else if (CY_RSLT_SUCCESS == (rslt = cy_rtos_init_mutex(&cy_retarget_io_mutex)))
|
||||
{
|
||||
cy_retarget_io_mutex_initialized = true;
|
||||
}
|
||||
return rslt;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_acquire
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static void cy_retarget_io_mutex_acquire(void)
|
||||
{
|
||||
CY_ASSERT(cy_retarget_io_mutex_initialized);
|
||||
cy_rslt_t rslt = cy_rtos_get_mutex(&cy_retarget_io_mutex, CY_RTOS_NEVER_TIMEOUT);
|
||||
if (rslt != CY_RSLT_SUCCESS)
|
||||
{
|
||||
abort();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_release
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static void cy_retarget_io_mutex_release(void)
|
||||
{
|
||||
CY_ASSERT(cy_retarget_io_mutex_initialized);
|
||||
cy_rslt_t rslt = cy_rtos_set_mutex(&cy_retarget_io_mutex);
|
||||
if (rslt != CY_RSLT_SUCCESS)
|
||||
{
|
||||
abort();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_deinit
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static void cy_retarget_io_mutex_deinit(void)
|
||||
{
|
||||
CY_ASSERT(cy_retarget_io_mutex_initialized);
|
||||
cy_rslt_t rslt = cy_rtos_deinit_mutex(&cy_retarget_io_mutex);
|
||||
if (rslt != CY_RSLT_SUCCESS)
|
||||
{
|
||||
abort();
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#else // if (defined(CY_RTOS_AWARE) || defined(COMPONENT_RTOS_AWARE)) && defined(__GNUC__) &&
|
||||
// !defined(__ARMCC_VERSION) && !defined(__clang__)
|
||||
#ifdef __ICCARM__
|
||||
// Ignore unused functions
|
||||
#pragma diag_suppress=Pe177
|
||||
#endif
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_init
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static inline cy_rslt_t cy_retarget_io_mutex_init(void)
|
||||
{
|
||||
return CY_RSLT_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
#if defined(__ARMCC_VERSION) // ARM-MDK
|
||||
__attribute__((unused))
|
||||
#endif
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_acquire
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static inline void cy_retarget_io_mutex_acquire(void)
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
#if defined(__ARMCC_VERSION) // ARM-MDK
|
||||
__attribute__((unused))
|
||||
#endif
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_release
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static inline void cy_retarget_io_mutex_release(void)
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
#if defined(__ARMCC_VERSION) // ARM-MDK
|
||||
__attribute__((unused))
|
||||
#endif
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_mutex_deinit
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static inline void cy_retarget_io_mutex_deinit(void)
|
||||
{
|
||||
}
|
||||
|
||||
|
||||
#endif // if (defined(CY_RTOS_AWARE) || defined(COMPONENT_RTOS_AWARE)) && defined(__GNUC__) &&
|
||||
// !defined(__ARMCC_VERSION) && !defined(__clang__)
|
||||
|
||||
#if defined(__cplusplus)
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
// UART HAL object used by BSP for Debug UART port
|
||||
cyhal_uart_t cy_retarget_io_uart_obj;
|
||||
|
||||
// Tracks the previous character sent to output stream
|
||||
#ifdef CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
static char cy_retarget_io_stdout_prev_char = 0;
|
||||
#endif // CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_getchar
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static inline cy_rslt_t cy_retarget_io_getchar(char* c)
|
||||
{
|
||||
return cyhal_uart_getc(&cy_retarget_io_uart_obj, (uint8_t*)c, 0);
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_putchar
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
static inline cy_rslt_t cy_retarget_io_putchar(char c)
|
||||
{
|
||||
return cyhal_uart_putc(&cy_retarget_io_uart_obj, (uint8_t)c);
|
||||
}
|
||||
|
||||
|
||||
#if defined(__ARMCC_VERSION) // ARM-MDK
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// fputc
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
__attribute__((weak)) int fputc(int ch, FILE* f)
|
||||
{
|
||||
(void)f;
|
||||
cy_rslt_t rslt = CY_RSLT_SUCCESS;
|
||||
#ifdef CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
if (((char)ch == '\n') && (cy_retarget_io_stdout_prev_char != '\r'))
|
||||
{
|
||||
rslt = cy_retarget_io_putchar('\r');
|
||||
}
|
||||
#endif // CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
|
||||
if (CY_RSLT_SUCCESS == rslt)
|
||||
{
|
||||
rslt = cy_retarget_io_putchar(ch);
|
||||
}
|
||||
|
||||
#ifdef CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
if (CY_RSLT_SUCCESS == rslt)
|
||||
{
|
||||
cy_retarget_io_stdout_prev_char = (char)ch;
|
||||
}
|
||||
#endif // CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
|
||||
return (CY_RSLT_SUCCESS == rslt) ? ch : EOF;
|
||||
}
|
||||
|
||||
|
||||
#elif defined (__ICCARM__) // IAR
|
||||
#include <yfuns.h>
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// __write
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
__weak size_t __write(int handle, const unsigned char* buffer, size_t size)
|
||||
{
|
||||
size_t nChars = 0;
|
||||
// This template only writes to "standard out", for all other file handles it returns failure.
|
||||
if (handle != _LLIO_STDOUT)
|
||||
{
|
||||
return (_LLIO_ERROR);
|
||||
}
|
||||
if (buffer != NULL)
|
||||
{
|
||||
cy_rslt_t rslt = CY_RSLT_SUCCESS;
|
||||
for (; nChars < size; ++nChars)
|
||||
{
|
||||
#ifdef CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
if ((*buffer == '\n') && (cy_retarget_io_stdout_prev_char != '\r'))
|
||||
{
|
||||
rslt = cy_retarget_io_putchar('\r');
|
||||
}
|
||||
#endif // CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
|
||||
if (rslt == CY_RSLT_SUCCESS)
|
||||
{
|
||||
rslt = cy_retarget_io_putchar(*buffer);
|
||||
}
|
||||
|
||||
if (rslt != CY_RSLT_SUCCESS)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
#ifdef CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
cy_retarget_io_stdout_prev_char = *buffer;
|
||||
#endif // CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
++buffer;
|
||||
}
|
||||
}
|
||||
return (nChars);
|
||||
}
|
||||
|
||||
|
||||
#else // (__GNUC__) GCC
|
||||
// Add an explicit reference to the floating point printf library to allow the usage of floating
|
||||
// point conversion specifier.
|
||||
__asm(".global _printf_float");
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _write
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
__attribute__((weak)) int _write(int fd, const char* ptr, int len)
|
||||
{
|
||||
int nChars = 0;
|
||||
(void)fd;
|
||||
if (ptr != NULL)
|
||||
{
|
||||
cy_rslt_t rslt = CY_RSLT_SUCCESS;
|
||||
cy_retarget_io_mutex_acquire();
|
||||
for (; nChars < len; ++nChars)
|
||||
{
|
||||
#ifdef CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
if ((*ptr == '\n') && (cy_retarget_io_stdout_prev_char != '\r'))
|
||||
{
|
||||
rslt = cy_retarget_io_putchar('\r');
|
||||
}
|
||||
#endif // CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
|
||||
if (CY_RSLT_SUCCESS == rslt)
|
||||
{
|
||||
rslt = cy_retarget_io_putchar((uint32_t)*ptr);
|
||||
}
|
||||
|
||||
if (CY_RSLT_SUCCESS != rslt)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
#ifdef CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
cy_retarget_io_stdout_prev_char = *ptr;
|
||||
#endif // CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
++ptr;
|
||||
}
|
||||
cy_retarget_io_mutex_release();
|
||||
}
|
||||
return (nChars);
|
||||
}
|
||||
|
||||
|
||||
#endif // if defined(__ARMCC_VERSION)
|
||||
|
||||
|
||||
#if defined(__ARMCC_VERSION) // ARM-MDK
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// fgetc
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
__attribute__((weak)) int fgetc(FILE* f)
|
||||
{
|
||||
(void)f;
|
||||
char c;
|
||||
cy_rslt_t rslt = cy_retarget_io_getchar(&c);
|
||||
return (CY_RSLT_SUCCESS == rslt) ? c : EOF;
|
||||
}
|
||||
|
||||
|
||||
#elif defined (__ICCARM__) // IAR
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// __read
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
__weak size_t __read(int handle, unsigned char* buffer, size_t size)
|
||||
{
|
||||
// This template only reads from "standard in", for all other file handles it returns failure.
|
||||
if ((handle != _LLIO_STDIN) || (buffer == NULL))
|
||||
{
|
||||
return (_LLIO_ERROR);
|
||||
}
|
||||
else
|
||||
{
|
||||
cy_rslt_t rslt = cy_retarget_io_getchar((char*)buffer);
|
||||
return (CY_RSLT_SUCCESS == rslt) ? 1 : 0;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#else // (__GNUC__) GCC
|
||||
// Add an explicit reference to the floating point scanf library to allow the usage of floating
|
||||
// point conversion specifier.
|
||||
__asm(".global _scanf_float");
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _read
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
__attribute__((weak)) int _read(int fd, char* ptr, int len)
|
||||
{
|
||||
(void)fd;
|
||||
|
||||
cy_rslt_t rslt;
|
||||
int nChars = 0;
|
||||
if (ptr != NULL)
|
||||
{
|
||||
for (; nChars < len; ++ptr)
|
||||
{
|
||||
rslt = cy_retarget_io_getchar(ptr);
|
||||
if (rslt == CY_RSLT_SUCCESS)
|
||||
{
|
||||
++nChars;
|
||||
if ((*ptr == '\n') || (*ptr == '\r'))
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
return (nChars);
|
||||
}
|
||||
|
||||
|
||||
#endif // if defined(__ARMCC_VERSION)
|
||||
|
||||
#if defined(__ARMCC_VERSION) // ARM-MDK
|
||||
// Include _sys_* prototypes provided by ARM Compiler runtime library
|
||||
#include <rt_sys.h>
|
||||
|
||||
// Prevent linkage of library functions that use semihosting calls
|
||||
__asm(".global __use_no_semihosting\n\t");
|
||||
|
||||
// Enable the linker to select an optimized library that does not include code to handle input
|
||||
// arguments to main()
|
||||
__asm(".global __ARM_use_no_argv\n\t");
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_open
|
||||
//
|
||||
// Open a file: dummy implementation.
|
||||
// Everything goes to the same output, no need to translate the file names
|
||||
// (__stdin_name/__stdout_name/__stderr_name) to descriptor numbers
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
FILEHANDLE __attribute__((weak)) _sys_open(const char* name, int openmode)
|
||||
{
|
||||
(void)name;
|
||||
(void)openmode;
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_close
|
||||
//
|
||||
// Close a file: dummy implementation.
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
int __attribute__((weak)) _sys_close(FILEHANDLE fh)
|
||||
{
|
||||
(void)fh;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_write
|
||||
//
|
||||
// Write to a file: dummy implementation.
|
||||
// The low-level function fputc retargets output to use UART TX
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
int __attribute__((weak)) _sys_write(FILEHANDLE fh, const unsigned char* buf, unsigned len,
|
||||
int mode)
|
||||
{
|
||||
(void)fh;
|
||||
(void)buf;
|
||||
(void)len;
|
||||
(void)mode;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_read
|
||||
//
|
||||
// Read from a file: dummy implementation.
|
||||
// The low-level function fputc retargets input to use UART RX
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
int __attribute__((weak)) _sys_read(FILEHANDLE fh, unsigned char* buf, unsigned len, int mode)
|
||||
{
|
||||
(void)fh;
|
||||
(void)buf;
|
||||
(void)len;
|
||||
(void)mode;
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _ttywrch
|
||||
//
|
||||
// Write a character to the output channel: dummy implementation.
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
void __attribute__((weak)) _ttywrch(int ch)
|
||||
{
|
||||
(void)ch;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_istty
|
||||
//
|
||||
// Check if the file is connected to a terminal: dummy implementation
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
int __attribute__((weak)) _sys_istty(FILEHANDLE fh)
|
||||
{
|
||||
(void)fh;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_seek
|
||||
//
|
||||
// Move the file position to a given offset: dummy implementation
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
int __attribute__((weak)) _sys_seek(FILEHANDLE fh, long pos)
|
||||
{
|
||||
(void)fh;
|
||||
(void)pos;
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_flen
|
||||
// Return the current length of a file: dummy implementation
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
long __attribute__((weak)) _sys_flen(FILEHANDLE fh)
|
||||
{
|
||||
(void)fh;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_exit
|
||||
//
|
||||
// Terminate the program: dummy implementation
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
void __attribute__((weak)) _sys_exit(int returncode)
|
||||
{
|
||||
(void)returncode;
|
||||
for (;;)
|
||||
{
|
||||
// Halt here forever
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// _sys_command_string
|
||||
//
|
||||
// Return a pointer to the command line: dummy implementation
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
char __attribute__((weak)) *_sys_command_string(char* cmd, int len)
|
||||
{
|
||||
(void)cmd;
|
||||
(void)len;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
#endif // ARM-MDK
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_init
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
cy_rslt_t cy_retarget_io_init(cyhal_gpio_t tx, cyhal_gpio_t rx, uint32_t baudrate)
|
||||
{
|
||||
const cyhal_uart_cfg_t uart_config =
|
||||
{
|
||||
.data_bits = 8,
|
||||
.stop_bits = 1,
|
||||
.parity = CYHAL_UART_PARITY_NONE,
|
||||
.rx_buffer = NULL,
|
||||
.rx_buffer_size = 0
|
||||
};
|
||||
|
||||
#if (CYHAL_API_VERSION >= 2)
|
||||
cy_rslt_t result =
|
||||
cyhal_uart_init(&cy_retarget_io_uart_obj, tx, rx, NC, NC, NULL, &uart_config);
|
||||
#else // HAL API version 1
|
||||
cy_rslt_t result = cyhal_uart_init(&cy_retarget_io_uart_obj, tx, rx, NULL, &uart_config);
|
||||
#endif
|
||||
|
||||
if (result == CY_RSLT_SUCCESS)
|
||||
{
|
||||
result = cyhal_uart_set_baud(&cy_retarget_io_uart_obj, baudrate, NULL);
|
||||
}
|
||||
|
||||
if (result == CY_RSLT_SUCCESS)
|
||||
{
|
||||
result = cy_retarget_io_mutex_init();
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_is_tx_active
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
bool cy_retarget_io_is_tx_active()
|
||||
{
|
||||
return cyhal_uart_is_tx_active(&cy_retarget_io_uart_obj);
|
||||
}
|
||||
|
||||
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
// cy_retarget_io_deinit
|
||||
//--------------------------------------------------------------------------------------------------
|
||||
void cy_retarget_io_deinit(void)
|
||||
{
|
||||
// Since the largest hardware buffer would be 256 bytes
|
||||
// it takes about 500 ms to transmit the 256 bytes at 9600 baud.
|
||||
// Thus 1000 ms gives roughly 50% padding to this time.
|
||||
int timeout_remaining_ms = 1000;
|
||||
while (timeout_remaining_ms > 0)
|
||||
{
|
||||
if (!cy_retarget_io_is_tx_active())
|
||||
{
|
||||
break;
|
||||
}
|
||||
cyhal_system_delay_ms(1);
|
||||
timeout_remaining_ms--;
|
||||
}
|
||||
CY_ASSERT(timeout_remaining_ms != 0);
|
||||
cyhal_uart_free(&cy_retarget_io_uart_obj);
|
||||
cy_retarget_io_mutex_deinit();
|
||||
}
|
||||
|
||||
|
||||
#if defined(__cplusplus)
|
||||
}
|
||||
#endif
|
||||
|
|
@ -0,0 +1,99 @@
|
|||
/***********************************************************************************************//**
|
||||
* \file cy_retarget_io.h
|
||||
*
|
||||
* \brief
|
||||
* Provides APIs for transmitting messages to or from the board via standard
|
||||
* printf/scanf functions. Messages are transmitted over a UART connection which
|
||||
* is generally connected to a host machine. Transmission is done at 115200 baud
|
||||
* using the tx and rx pins provided by the user of this library. The UART
|
||||
* instance is made available via cy_retarget_io_uart_obj in case any changes
|
||||
* to the default configuration are desired.
|
||||
* NOTE: If the application is built using newlib-nano, by default, floating
|
||||
* point format strings (%f) are not supported. To enable this support you must
|
||||
* add '-u _printf_float' to the linker command line.
|
||||
*
|
||||
***************************************************************************************************
|
||||
* \copyright
|
||||
* Copyright 2018-2021 Cypress Semiconductor Corporation (an Infineon company) or
|
||||
* an affiliate of Cypress Semiconductor Corporation
|
||||
*
|
||||
* SPDX-License-Identifier: Apache-2.0
|
||||
*
|
||||
* 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.
|
||||
**************************************************************************************************/
|
||||
|
||||
/**
|
||||
* \addtogroup group_board_libs Retarget IO
|
||||
* \{
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <stdio.h>
|
||||
#include "cy_result.h"
|
||||
#include "cyhal_hw_types.h"
|
||||
|
||||
#if defined(__cplusplus)
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
/** UART HAL object used by this library */
|
||||
extern cyhal_uart_t cy_retarget_io_uart_obj;
|
||||
|
||||
/** UART baud rate */
|
||||
#define CY_RETARGET_IO_BAUDRATE (115200)
|
||||
|
||||
#ifdef DOXYGEN
|
||||
|
||||
/** Defining this macro enables conversion of line feed (LF) into carriage
|
||||
* return followed by line feed (CR & LF) on the output direction (STDOUT). You
|
||||
* can define this macro through the DEFINES variable in the application
|
||||
* Makefile.
|
||||
*/
|
||||
#define CY_RETARGET_IO_CONVERT_LF_TO_CRLF
|
||||
|
||||
#endif // DOXYGEN
|
||||
|
||||
/**
|
||||
* \brief Initialization function for redirecting low level IO commands to allow
|
||||
* sending messages over a UART interface. This will setup the communication
|
||||
* interface to allow using printf and related functions.
|
||||
*
|
||||
* In an RTOS environment, this function must be called after the RTOS has been
|
||||
* initialized.
|
||||
*
|
||||
* \param tx UART TX pin
|
||||
* \param rx UART RX pin
|
||||
* \param baudrate UART baudrate
|
||||
* \returns CY_RSLT_SUCCESS if successfully initialized, else an error about
|
||||
* what went wrong
|
||||
*/
|
||||
cy_rslt_t cy_retarget_io_init(cyhal_gpio_t tx, cyhal_gpio_t rx, uint32_t baudrate);
|
||||
|
||||
/**
|
||||
* \brief Checks whether there is data waiting to be written to the serial console.
|
||||
* \returns true if there are pending TX transactions, otherwise false
|
||||
*/
|
||||
bool cy_retarget_io_is_tx_active();
|
||||
|
||||
/**
|
||||
* \brief Releases the UART interface allowing it to be used for other purposes.
|
||||
* After calling this, printf and related functions will no longer work.
|
||||
*/
|
||||
void cy_retarget_io_deinit(void);
|
||||
|
||||
#if defined(__cplusplus)
|
||||
}
|
||||
#endif
|
||||
|
||||
/** \} group_board_libs */
|
||||
|
|
@ -0,0 +1 @@
|
|||
<version>1.3.0.25183</version>
|
||||
Loading…
Reference in New Issue