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| author | James Cameron <quozl@laptop.org> | 2017-07-12 20:53:41 +1000 |
|---|---|---|
| committer | James Cameron <quozl@laptop.org> | 2017-07-12 20:53:41 +1000 |
| commit | e3fc0821f33cbe877ee47deec23748f8cc7c1339 (patch) | |
| tree | fd4c1569fbc617d4a38f04055390a27ebafdb4eb | |
| parent | ae8559721e739d95d24300fc02321d8d89e6ce38 (diff) | |
| download | cforth-e3fc0821f33cbe877ee47deec23748f8cc7c1339.tar.gz | |
arm-teensy3 - serial receive hardware flow control
When enabled in build, Teensy 3.1 pin 6 is RTS and must be tied to CTS
of host. Host must be configured to observe CTS.
Tested with `screen /dev/ttyUSB0 115200,crtscts` no issues.
Tested with `cat /dev/ttyUSB0` and `for x in $(seq 10000); do echo -e "get-msecs .d ( $x )\n" > /dev/ttyUSB0; done` no issues.
| -rw-r--r-- | src/platform/arm-teensy3/consoleio.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/platform/arm-teensy3/consoleio.c b/src/platform/arm-teensy3/consoleio.c index 712cfa9..57ebf1e 100644 --- a/src/platform/arm-teensy3/consoleio.c +++ b/src/platform/arm-teensy3/consoleio.c @@ -193,6 +193,12 @@ void init_uart() // sre - slew rate enable, slow, p229 CORE_PIN1_CONFIG = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); +#ifdef ENABLE_RTS + // hardware flow control on receive path only, using RTS + CORE_PIN6_CONFIG = PORT_PCR_DSE | PORT_PCR_SRE | PORT_PCR_MUX(3); + UART0_MODEM = UART_MODEM_RXRTSE; +#endif + // baud rate generator, 115200, derived from test build // reference, *RM.pdf, table 47-57, page 1275, 38400 baud? UART0_BDH = 0; |