Overview

This chapter describes the programming interface of the serial manager component.

The serial manager component provides a series of APIs to operate different serial port types. The port types it supports are UART, USB CDC and SWO.

Modules
	Serial Port SWO

	Serial Port USB

	Serial Port Uart

	Serial Port Virtual USB

Data Structures
struct	serial_manager_config_t
	serial manager config structure More...

struct	serial_manager_callback_message_t
	Callback message structure. More...

Macros
#define	SERIAL_PORT_TYPE_UART (1U)
	Enable or disable uart port (1 - enable, 0 - disable)

#define	SERIAL_PORT_TYPE_USBCDC (0U)
	Enable or disable USB CDC port (1 - enable, 0 - disable)

#define	SERIAL_PORT_TYPE_SWO (0U)
	Enable or disable SWO port (1 - enable, 0 - disable)

#define	SERIAL_PORT_TYPE_USBCDC_VIRTUAL (0U)
	Enable or disable USB CDC virtual port (1 - enable, 0 - disable)

#define	SERIAL_MANAGER_WRITE_HANDLE_SIZE (4U)
	Set serial manager write handle size.

#define	SERIAL_MANAGER_HANDLE_SIZE (SERIAL_MANAGER_HANDLE_SIZE_TEMP + 12U)
	SERIAL_PORT_UART_HANDLE_SIZE/SERIAL_PORT_USB_CDC_HANDLE_SIZE + serial manager dedicated size.

Typedefs
typedef void(*	serial_manager_callback_t )(void callbackParam, serial_manager_callback_message_t message, serial_manager_status_t status)
	callback function

Enumerations
enum	serial_port_type_t { kSerialPort_Uart = 1U, kSerialPort_UsbCdc, kSerialPort_Swo, kSerialPort_UsbCdcVirtual }
	serial port type More...

enum	serial_manager_status_t { kStatus_SerialManager_Success = kStatus_Success, kStatus_SerialManager_Error = MAKE_STATUS(kStatusGroup_SERIALMANAGER, 1), kStatus_SerialManager_Busy = MAKE_STATUS(kStatusGroup_SERIALMANAGER, 2), kStatus_SerialManager_Notify = MAKE_STATUS(kStatusGroup_SERIALMANAGER, 3), kStatus_SerialManager_Canceled, kStatus_SerialManager_HandleConflict = MAKE_STATUS(kStatusGroup_SERIALMANAGER, 5), kStatus_SerialManager_RingBufferOverflow }
	serial manager error code More...

Functions
serial_manager_status_t	SerialManager_Init (serial_handle_t serialHandle, serial_manager_config_t *config)
	Initializes a serial manager module with the serial manager handle and the user configuration structure. More...

serial_manager_status_t	SerialManager_Deinit (serial_handle_t serialHandle)
	De-initializes the serial manager module instance. More...

serial_manager_status_t	SerialManager_OpenWriteHandle (serial_handle_t serialHandle, serial_write_handle_t writeHandle)
	Opens a writing handle for the serial manager module. More...

serial_manager_status_t	SerialManager_CloseWriteHandle (serial_write_handle_t writeHandle)
	Closes a writing handle for the serial manager module. More...

serial_manager_status_t	SerialManager_OpenReadHandle (serial_handle_t serialHandle, serial_read_handle_t readHandle)
	Opens a reading handle for the serial manager module. More...

serial_manager_status_t	SerialManager_CloseReadHandle (serial_read_handle_t readHandle)
	Closes a reading for the serial manager module. More...

serial_manager_status_t	SerialManager_WriteBlocking (serial_write_handle_t writeHandle, uint8_t *buffer, uint32_t length)
	Transmits data with the blocking mode. More...

serial_manager_status_t	SerialManager_ReadBlocking (serial_read_handle_t readHandle, uint8_t *buffer, uint32_t length)
	Reads data with the blocking mode. More...

serial_manager_status_t	SerialManager_EnterLowpower (serial_handle_t serialHandle)
	Prepares to enter low power consumption. More...

serial_manager_status_t	SerialManager_ExitLowpower (serial_handle_t serialHandle)
	Restores from low power consumption. More...

Data Structure Documentation

struct serial_manager_config_t

Data Fields
uint8_t *	ringBuffer
	Ring buffer address, it is used to buffer data received by the hardware. More...

uint32_t	ringBufferSize
	The size of the ring buffer.

serial_port_type_t	type
	Serial port type.

void *	portConfig
	Serial port configuration.

Field Documentation

uint8_t* serial_manager_config_t::ringBuffer

Besides, the memory space cannot be free during the lifetime of the serial manager module.

struct serial_manager_callback_message_t

Data Fields
uint8_t *	buffer
	Transferred buffer.

uint32_t	length
	Transferred data length.

Enumeration Type Documentation

enum serial_port_type_t

Enumerator
kSerialPort_Uart	Serial port UART.
kSerialPort_UsbCdc	Serial port USB CDC.
kSerialPort_Swo	Serial port SWO.
kSerialPort_UsbCdcVirtual	Serial port USB CDC Virtual.

enum serial_manager_status_t

Enumerator
kStatus_SerialManager_Success	Success.
kStatus_SerialManager_Error	Failed.
kStatus_SerialManager_Busy	Busy.
kStatus_SerialManager_Notify	Ring buffer is not empty.
kStatus_SerialManager_Canceled	the non-blocking request is canceled
kStatus_SerialManager_HandleConflict	The handle is opened.
kStatus_SerialManager_RingBufferOverflow	The ring buffer is overflowed.

Function Documentation

serial_manager_status_t SerialManager_Init	(	serial_handle_t	serialHandle,
		serial_manager_config_t *	config
	)

This function configures the Serial Manager module with user-defined settings. The user can configure the configuration structure. The parameter serialHandle is a pointer to point to a memory space of size SERIAL_MANAGER_HANDLE_SIZE allocated by the caller. The Serial Manager module supports two types of serial port, UART (includes UART, USART, LPSCI, LPUART, etc) and USB CDC. Please refer to serial_port_type_t for serial port setting. These two types can be set by using serial_manager_config_t.

Example below shows how to use this API to configure the Serial Manager. For UART,

*   #define SERIAL_MANAGER_RING_BUFFER_SIZE          (256U)
*   static uint8_t s_serialHandleBuffer[SERIAL_MANAGER_HANDLE_SIZE];
*   static serial_handle_t s_serialHandle = &s_serialHandleBuffer[0];
*   static uint8_t s_ringBuffer[SERIAL_MANAGER_RING_BUFFER_SIZE];
*
*   serial_manager_config_t config;
*   serial_port_uart_config_t uartConfig;
*   config.type = kSerialPort_Uart;
*   config.ringBuffer = &s_ringBuffer[0];
*   config.ringBufferSize = SERIAL_MANAGER_RING_BUFFER_SIZE;
*   uartConfig.instance = 0;
*   uartConfig.clockRate = 24000000;
*   uartConfig.baudRate = 115200;
*   uartConfig.parityMode = kSerialManager_UartParityDisabled;
*   uartConfig.stopBitCount = kSerialManager_UartOneStopBit;
*   uartConfig.enableRx = 1;
*   uartConfig.enableTx = 1;
*   config.portConfig = &uartConfig;
*   SerialManager_Init(s_serialHandle, &config);
*  

For USB CDC,

*   #define SERIAL_MANAGER_RING_BUFFER_SIZE          (256U)
*   static uint8_t s_serialHandleBuffer[SERIAL_MANAGER_HANDLE_SIZE];
*   static serial_handle_t s_serialHandle = &s_serialHandleBuffer[0];
*   static uint8_t s_ringBuffer[SERIAL_MANAGER_RING_BUFFER_SIZE];
*
*   serial_manager_config_t config;
*   serial_port_usb_cdc_config_t usbCdcConfig;
*   config.type = kSerialPort_UsbCdc;
*   config.ringBuffer = &s_ringBuffer[0];
*   config.ringBufferSize = SERIAL_MANAGER_RING_BUFFER_SIZE;
*   usbCdcConfig.controllerIndex = kSerialManager_UsbControllerKhci0;
*   config.portConfig = &usbCdcConfig;
*   SerialManager_Init(s_serialHandle, &config);
*  

Parameters

serialHandle	Pointer to point to a memory space of size SERIAL_MANAGER_HANDLE_SIZE allocated by the caller.
config	Pointer to user-defined configuration structure.

Return values

kStatus_SerialManager_Error	An error occurred.
kStatus_SerialManager_Success	The Serial Manager module initialization succeed.

serial_manager_status_t SerialManager_Deinit ( serial_handle_t serialHandle )

This function de-initializes the serial manager module instance. If the opened writing or reading handle is not closed, the function will return kStatus_SerialManager_Busy.

Parameters

serialHandle The serial manager module handle pointer.

Return values

kStatus_SerialManager_Success	The serial manager de-initialization succeed.
kStatus_SerialManager_Busy	Opened reading or writing handle is not closed.

serial_manager_status_t SerialManager_OpenWriteHandle	(	serial_handle_t	serialHandle,
		serial_write_handle_t	writeHandle
	)

This function Opens a writing handle for the serial manager module. If the serial manager needs to be used in different tasks, the task should open a dedicated write handle for itself by calling SerialManager_OpenWriteHandle. Since there can only one buffer for transmission for the writing handle at the same time, multiple writing handles need to be opened when the multiple transmission is needed for a task.

Parameters

serialHandle	The serial manager module handle pointer.
writeHandle	The serial manager module writing handle pointer.

Return values

kStatus_SerialManager_Error	An error occurred.
kStatus_SerialManager_HandleConflict	The writing handle was opened.
kStatus_SerialManager_Success	The writing handle is opened.

Example below shows how to use this API to write data. For task 1,

*   static uint8_t s_serialWriteHandleBuffer1[SERIAL_MANAGER_WRITE_HANDLE_SIZE];
*   static serial_write_handle_t s_serialWriteHandle1 = &s_serialWriteHandleBuffer1[0];
*   static uint8_t s_nonBlockingWelcome1[] = "This is non-blocking writing log for task1!\r\n";
*   SerialManager_OpenWriteHandle(serialHandle, s_serialWriteHandle1);
*   SerialManager_InstallTxCallback(s_serialWriteHandle1, Task1_SerialManagerTxCallback, s_serialWriteHandle1);
*   SerialManager_WriteNonBlocking(s_serialWriteHandle1, s_nonBlockingWelcome1, sizeof(s_nonBlockingWelcome1) - 1);
*  

For task 2,

*   static uint8_t s_serialWriteHandleBuffer2[SERIAL_MANAGER_WRITE_HANDLE_SIZE];
*   static serial_write_handle_t s_serialWriteHandle2 = &s_serialWriteHandleBuffer2[0];
*   static uint8_t s_nonBlockingWelcome2[] = "This is non-blocking writing log for task2!\r\n";
*   SerialManager_OpenWriteHandle(serialHandle, s_serialWriteHandle2);
*   SerialManager_InstallTxCallback(s_serialWriteHandle2, Task2_SerialManagerTxCallback, s_serialWriteHandle2);
*   SerialManager_WriteNonBlocking(s_serialWriteHandle2, s_nonBlockingWelcome2, sizeof(s_nonBlockingWelcome2) - 1);
*  

serial_manager_status_t SerialManager_CloseWriteHandle ( serial_write_handle_t writeHandle )

This function Closes a writing handle for the serial manager module.

Parameters

writeHandle The serial manager module writing handle pointer.

Return values

kStatus_SerialManager_Success The writing handle is closed.

serial_manager_status_t SerialManager_OpenReadHandle	(	serial_handle_t	serialHandle,
		serial_read_handle_t	readHandle
	)

This function Opens a reading handle for the serial manager module. The reading handle can not be opened multiple at the same time. The error code kStatus_SerialManager_Busy would be returned when the previous reading handle is not closed. And There can only be one buffer for receiving for the reading handle at the same time.

Parameters

serialHandle	The serial manager module handle pointer.
readHandle	The serial manager module reading handle pointer.

Return values

kStatus_SerialManager_Error	An error occurred.
kStatus_SerialManager_Success	The reading handle is opened.
kStatus_SerialManager_Busy	Previous reading handle is not closed.

Example below shows how to use this API to read data.

*   static uint8_t s_serialReadHandleBuffer[SERIAL_MANAGER_READ_HANDLE_SIZE];
*   static serial_read_handle_t s_serialReadHandle = &s_serialReadHandleBuffer[0];
*   SerialManager_OpenReadHandle(serialHandle, s_serialReadHandle);
*   static uint8_t s_nonBlockingBuffer[64];
*   SerialManager_InstallRxCallback(s_serialReadHandle, APP_SerialManagerRxCallback, s_serialReadHandle);
*   SerialManager_ReadNonBlocking(s_serialReadHandle, s_nonBlockingBuffer, sizeof(s_nonBlockingBuffer));
*  

serial_manager_status_t SerialManager_CloseReadHandle ( serial_read_handle_t readHandle )

This function Closes a reading for the serial manager module.

Parameters

readHandle The serial manager module reading handle pointer.

Return values

kStatus_SerialManager_Success The reading handle is closed.

serial_manager_status_t SerialManager_WriteBlocking	(	serial_write_handle_t	writeHandle,
		uint8_t *	buffer,
		uint32_t	length
	)

This is a blocking function, which polls the sending queue, waits for the sending queue to be empty. This function sends data using an interrupt method. The interrupt of the hardware could not be disabled. And There can only one buffer for transmission for the writing handle at the same time.

Note: The function SerialManager_WriteBlocking and the function #SerialManager_WriteNonBlocking cannot be used at the same time. And, the function #SerialManager_CancelWriting cannot be used to abort the transmission of this function.

Parameters

writeHandle	The serial manager module handle pointer.
buffer	Start address of the data to write.
length	Length of the data to write.

Return values

kStatus_SerialManager_Success	Successfully sent all data.
kStatus_SerialManager_Busy	Previous transmission still not finished; data not all sent yet.
kStatus_SerialManager_Error	An error occurred.

serial_manager_status_t SerialManager_ReadBlocking	(	serial_read_handle_t	readHandle,
		uint8_t *	buffer,
		uint32_t	length
	)

This is a blocking function, which polls the receiving buffer, waits for the receiving buffer to be full. This function receives data using an interrupt method. The interrupt of the hardware could not be disabled. And There can only one buffer for receiving for the reading handle at the same time.

Note: The function SerialManager_ReadBlocking and the function #SerialManager_ReadNonBlocking cannot be used at the same time. And, the function #SerialManager_CancelReading cannot be used to abort the transmission of this function.

Parameters

readHandle	The serial manager module handle pointer.
buffer	Start address of the data to store the received data.
length	The length of the data to be received.

Return values

kStatus_SerialManager_Success	Successfully received all data.
kStatus_SerialManager_Busy	Previous transmission still not finished; data not all received yet.
kStatus_SerialManager_Error	An error occurred.

serial_manager_status_t SerialManager_EnterLowpower ( serial_handle_t serialHandle )

This function is used to prepare to enter low power consumption.

Parameters

serialHandle The serial manager module handle pointer.

Return values

kStatus_SerialManager_Success Successful operation.

serial_manager_status_t SerialManager_ExitLowpower ( serial_handle_t serialHandle )

This function is used to restore from low power consumption.

Parameters

serialHandle The serial manager module handle pointer.

Return values

kStatus_SerialManager_Success Successful operation.

Overview

Modules

Data Structures

Macros

Typedefs

Enumerations

Functions

Data Structure Documentation

Data Fields

Field Documentation

Data Fields

Enumeration Type Documentation

Function Documentation