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Merge pull request #534 from hexluthor/rl78-fixes

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UART-related fixes for Renesas RL78
This commit is contained in:
Mariano Alvira 2014-01-23 13:45:52 -08:00
commit 3724c01637
3 changed files with 55 additions and 10 deletions
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46
cpu/rl78/dev/uart1.h Normal file
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@ -0,0 +1,46 @@
/*
* Copyright (c) 2014, Analog Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \author Ian Martin <martini@redwirellc.com>
*
* \file
* This file exists only because some examples rely on it.
*/
#ifndef UART1_H
#define UART1_H
#undef BAUD2UBR
#define BAUD2UBR(x) (x)
#define uart1_set_input(f) uart0_set_input(f)
#endif /* UART1_H */

11
cpu/rl78/uart0.c
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@ -38,14 +38,13 @@
#include "uart0.h"
#define DESIRED_BAUDRATE 9600
#define FUDGE_FACTOR 4
#define DESIRED_BAUDRATE 38400
/* Note that only 9600 and 115200 bps were tested: */
#define PRESCALE_THRESH ((9600 + 115200) / 2)
/* Note that only 9600, 38400, and 115200 bps were tested. */
#define PRESCALE_THRESH ((38400 + 115200) / 2)
#define PRS_VALUE ((DESIRED_BAUDRATE < PRESCALE_THRESH) ? 4 : 0)
#define f_MCK (f_CLK / (1 << PRS_VALUE) / FUDGE_FACTOR)
#define SDR_VALUE ((f_MCK / DESIRED_BAUDRATE) >> 1)
#define f_MCK (f_CLK / (1 << PRS_VALUE))
#define SDR_VALUE (f_MCK / DESIRED_BAUDRATE / 2 - 1)
void
uart0_init(void)

8
platform/eval-adf7xxxmb4z/README.md
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@ -38,7 +38,7 @@ Flash the example onto the eval board after ensuring that switch #2 of DIP switc
rl78flash/rl78flash -vv -i -m3 /dev/ttyUSB0 -b500000 -a contiki/examples/rime/example-abc.eval-adf7xxxmb4z.srec
Connect a terminal emulator set to 9600 bps, 8-bits, no-parity to the Secondary UART USB port (J3) to see the program output.
Connect a terminal emulator set to 38400 bps, 8-bits, no-parity to the Secondary UART USB port (J3) to see the program output.
### IPv6 Web Server ###
@ -52,7 +52,7 @@ Build and run the SLIP tunnel on the host machine.
Here it is assumed that the Secondary UART USB port (J3) is attached to /dev/ttyUSB1:
make -C contiki/tools tunslip6
sudo contiki/tools/tunslip6 -B 9600 -s /dev/ttyUSB1 -v3 aaaa::1/64
sudo contiki/tools/tunslip6 -B 38400 -s /dev/ttyUSB1 -v3 aaaa::1/64
Open the border router home page at http://[aaaa::302:304:506:708]/
@ -96,7 +96,7 @@ Flash the output file `example-abc.eval-adf7xxxmb4z.srec` using the
[Renesas Flash Programmer](http://am.renesas.com/products/tools/flash_prom_programming/rfp)
(registration required).
Connect a terminal emulator (e.g. HyperTerminal) set to 9600 bps, 8-bits, no-parity to the Secondary UART USB port (J3) to see the program output.
Connect a terminal emulator (e.g. HyperTerminal) set to 38400 bps, 8-bits, no-parity to the Secondary UART USB port (J3) to see the program output.
### Using IAR Embedded Workbench ###
@ -125,4 +125,4 @@ Flash the output file `example-abc.eval-adf7xxxmb4z.srec` using the
[Renesas Flash Programmer](http://am.renesas.com/products/tools/flash_prom_programming/rfp)
(registration required).
Connect a terminal emulator (e.g. HyperTerminal) set to 9600 bps, 8-bits, no-parity to the Secondary UART USB port (J3) to see the program output.
Connect a terminal emulator (e.g. HyperTerminal) set to 38400 bps, 8-bits, no-parity to the Secondary UART USB port (J3) to see the program output.