ARMmbed
/
mbed-os
mirror of https://github.com/ARMmbed/mbed-os.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Optional hardware flow control for STDOUT 

Some platforms have interface chips with hardware flow control
enabled by default. This commit adds configurable flow control to
STDOUT.

Usage:

* Define pin names STDIO_UART_RTS for Rx-flow-control and
  STDIO_UART_CTS for Tx-flow-control.
* Set target.console-uart-flow-control. Valid options are:
  null, RTS, CTS, and RTSCTS.
pull/6603/head
Marcus Chang 2018-04-11 09:53:06 -07:00
parent 3bc2d2e1db
commit 7e6538ffed
2 changed files with 31 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
platform/mbed_retarget.cpp
View File

@ -72,6 +72,16 @@ static SingletonPtr<PlatformMutex> _mutex;
#define FILE_HANDLE_RESERVED ((FileHandle*)0xFFFFFFFF)
/**
* Macros for setting console flow control.
*/
#define CONSOLE_FLOWCONTROL_RTS 1
#define CONSOLE_FLOWCONTROL_CTS 2
#define CONSOLE_FLOWCONTROL_RTSCTS 3
#define mbed_console_concat_(x) CONSOLE_FLOWCONTROL_##x
#define mbed_console_concat(x) mbed_console_concat_(x)
#define CONSOLE_FLOWCONTROL mbed_console_concat(MBED_CONF_TARGET_CONSOLE_UART_FLOW_CONTROL)
using namespace mbed;
#if defined(__MICROLIB) && (__ARMCC_VERSION>5030000)
@ -147,6 +157,13 @@ DirectSerial::DirectSerial(PinName tx, PinName rx, int baud) {
if (stdio_uart_inited) return;
serial_init(&stdio_uart, tx, rx);
serial_baud(&stdio_uart, baud);
#if CONSOLE_FLOWCONTROL == CONSOLE_FLOWCONTROL_RTS
serial_set_flow_control(&stdio_uart, FlowControlRTS, STDIO_UART_RTS, NC);
#elif CONSOLE_FLOWCONTROL == CONSOLE_FLOWCONTROL_CTS
serial_set_flow_control(&stdio_uart, FlowControlCTS, NC, STDIO_UART_CTS);
#elif CONSOLE_FLOWCONTROL == CONSOLE_FLOWCONTROL_RTSCTS
serial_set_flow_control(&stdio_uart, FlowControlRTSCTS, STDIO_UART_RTS, STDIO_UART_CTS);
#endif
}
ssize_t DirectSerial::write(const void *buffer, size_t size) {
@ -216,6 +233,13 @@ static FileHandle* default_console()
#if DEVICE_SERIAL
# if MBED_CONF_PLATFORM_STDIO_BUFFERED_SERIAL
static UARTSerial console(STDIO_UART_TX, STDIO_UART_RX, MBED_CONF_PLATFORM_STDIO_BAUD_RATE);
# if CONSOLE_FLOWCONTROL == CONSOLE_FLOWCONTROL_RTS
console.set_flow_control(SerialBase::RTS, STDIO_UART_RTS, NC);
# elif CONSOLE_FLOWCONTROL == CONSOLE_FLOWCONTROL_CTS
console.set_flow_control(SerialBase::CTS, NC, STDIO_UART_CTS);
# elif CONSOLE_FLOWCONTROL == CONSOLE_FLOWCONTROL_RTSCTS
console.set_flow_control(SerialBase::RTSCTS, STDIO_UART_RTS, STDIO_UART_CTS);
# endif
# else
static DirectSerial console(STDIO_UART_TX, STDIO_UART_RX, MBED_CONF_PLATFORM_STDIO_BAUD_RATE);
# endif

8
targets/targets.json
View File

@ -11,7 +11,13 @@
"detect_code": [],
"public": false,
"default_lib": "std",
"bootloader_supported": false
"bootloader_supported": false,
"config": {
"console-uart-flow-control": {
"help": "Console hardware flow control. Options: null, RTS, CTS, RTSCTS.",
"value": null
}
}
},
"CM4_UARM": {
"inherits": ["Target"],