From 9ae9742ac59b18cf989370f53d669daeb75bd7a3 Mon Sep 17 00:00:00 2001 From: tmk Date: Mon, 25 Nov 2013 17:43:26 +0900 Subject: Add ps2_busywait.c and recfactor PS/2 protocol --- protocol/ps2_busywait.c | 179 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 179 insertions(+) create mode 100644 protocol/ps2_busywait.c (limited to 'protocol/ps2_busywait.c') diff --git a/protocol/ps2_busywait.c b/protocol/ps2_busywait.c new file mode 100644 index 0000000000..1e29258895 --- /dev/null +++ b/protocol/ps2_busywait.c @@ -0,0 +1,179 @@ +/* +Copyright 2010,2011,2012,2013 Jun WAKO + +This software is licensed with a Modified BSD License. +All of this is supposed to be Free Software, Open Source, DFSG-free, +GPL-compatible, and OK to use in both free and proprietary applications. +Additions and corrections to this file are welcome. + + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +* Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +* 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. + +* Neither the name of the copyright holders nor the names of + 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 OWNER 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. +*/ + +#include +#include +#include "ps2.h" +#include "debug.h" + + +/* + * PS/2 protocol busywait version + */ + +#define WAIT(stat, us, err) do { \ + if (!wait_##stat(us)) { \ + ps2_error = err; \ + goto ERROR; \ + } \ +} while (0) + +uint8_t ps2_error = PS2_ERR_NONE; + + +void ps2_host_init(void) +{ + // POR(150-2000ms) plus BAT(300-500ms) may take 2.5sec([3]p.20) + _delay_ms(2500); + + inhibit(); +} + +uint8_t ps2_host_send(uint8_t data) +{ + uint8_t res = 0; + bool parity = true; + ps2_error = PS2_ERR_NONE; + /* terminate a transmission if we have */ + inhibit(); + _delay_us(200); // at least 100us + + /* start bit [1] */ + data_lo(); + clock_hi(); + WAIT(clock_lo, 20000, 10); // may take 15ms at most until device starts clocking + /* data [2-9] */ + for (uint8_t i = 0; i < 8; i++) { + _delay_us(15); + if (data&(1< PS2_ERR_STARTBIT3) { + printf("x%02X\n", ps2_error); + } + inhibit(); + return 0; +} -- cgit v1.2.3 From 9d26053f1c14da79336a64f800305660d1a71180 Mon Sep 17 00:00:00 2001 From: tmk Date: Tue, 26 Nov 2013 14:31:57 +0900 Subject: Fix ps2_host_recv_response --- protocol/ps2_busywait.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'protocol/ps2_busywait.c') diff --git a/protocol/ps2_busywait.c b/protocol/ps2_busywait.c index 1e29258895..5ab377877e 100644 --- a/protocol/ps2_busywait.c +++ b/protocol/ps2_busywait.c @@ -104,6 +104,7 @@ uint8_t ps2_host_send(uint8_t data) WAIT(clock_hi, 50, 8); WAIT(data_hi, 50, 9); + inhibit(); res = ps2_host_recv_response(); ERROR: inhibit(); @@ -113,12 +114,14 @@ ERROR: /* receive data when host want else inhibit communication */ uint8_t ps2_host_recv_response(void) { - // TODO: // Command might take 20ms to response([3]p.21) // TrackPoint might take 25ms ([5]2.7) + // 250 * 100us(wait for start bit in ps2_host_recv) uint8_t data = 0; - uint8_t try = 200; - while (try-- && (data = ps2_host_recv())) ; + uint8_t try = 250; + do { + data = ps2_host_recv(); + } while (try-- && ps2_error); return data; } @@ -172,7 +175,7 @@ uint8_t ps2_host_recv(void) return data; ERROR: if (ps2_error > PS2_ERR_STARTBIT3) { - printf("x%02X\n", ps2_error); + xprintf("x%02X\n", ps2_error); } inhibit(); return 0; -- cgit v1.2.3 From 4eb27ee89038e934dcb498df7508199efd9c93f1 Mon Sep 17 00:00:00 2001 From: tmk Date: Thu, 28 Nov 2013 14:20:00 +0900 Subject: Add ps2_interrupt.c --- protocol/ps2_busywait.c | 51 ++++++++++++++++++++++++++----------------------- 1 file changed, 27 insertions(+), 24 deletions(-) (limited to 'protocol/ps2_busywait.c') diff --git a/protocol/ps2_busywait.c b/protocol/ps2_busywait.c index 5ab377877e..05dd7b27e6 100644 --- a/protocol/ps2_busywait.c +++ b/protocol/ps2_busywait.c @@ -35,16 +35,16 @@ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +/* + * PS/2 protocol busywait version + */ + #include #include #include "ps2.h" #include "debug.h" -/* - * PS/2 protocol busywait version - */ - #define WAIT(stat, us, err) do { \ if (!wait_##stat(us)) { \ ps2_error = err; \ @@ -52,6 +52,7 @@ POSSIBILITY OF SUCH DAMAGE. } \ } while (0) + uint8_t ps2_error = PS2_ERR_NONE; @@ -65,18 +66,19 @@ void ps2_host_init(void) uint8_t ps2_host_send(uint8_t data) { - uint8_t res = 0; bool parity = true; ps2_error = PS2_ERR_NONE; + /* terminate a transmission if we have */ inhibit(); - _delay_us(200); // at least 100us + _delay_us(100); // 100us [4]p.13, [5]p.50 - /* start bit [1] */ + /* 'Request to Send' and Start bit */ data_lo(); clock_hi(); - WAIT(clock_lo, 20000, 10); // may take 15ms at most until device starts clocking - /* data [2-9] */ + WAIT(clock_lo, 10000, 10); // 10ms [5]p.50 + + /* Data bit */ for (uint8_t i = 0; i < 8; i++) { _delay_us(15); if (data&(1<