semihost server example program
Dependencies: SWD mbed USBLocalFileSystem BaseDAP USBDAP
LPCXpresso LPC11U68 | LPCXpresso LPC1549 | FRDM-KL46Z | EA LPC4088 QSB app-board | LPC1768 app-board | LPC810 | LPC1114FN28 | |
---|---|---|---|---|---|---|---|
server | server | server | server | server | client | client | |
SWDIO | D12 | D12 | D12 | p25 | p21 | p4(P0_2) | p12 |
SWCLK | D10 | D10 | D10 | p26 | p22 | p3(P0_3) | p3 |
nRESET *option | D6 | D6 | D6 | p34 | p30 | p1(P0_5) | p23 |
GND | GND | GND | GND | p1 | p1 | p7 | p22 |
3.3V | P3V3 | P3V3 | P3V3 | p44 | p40 | p6 | p21 |
flash write | SW2(P0_1) | SW3(P1_9) | SW1 | p14 joystick center | p14 joystick center |
client example:
Import programlpc810-semihost_helloworld
semihost client example program
Diff: SWSPI/SWSPI.cpp
- Revision:
- 11:ad8af1047350
- Child:
- 16:89d9621681a2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SWSPI/SWSPI.cpp Sun Feb 23 12:06:02 2014 +0000 @@ -0,0 +1,88 @@ +/* SWSPI, Software SPI library + * Copyright (c) 2012-2014, David R. Van Wagner, http://techwithdave.blogspot.com + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include <mbed.h> +#include "SWSPI.h" + +SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin) +{ + mosi = new DigitalOut(mosi_pin); + miso = new DigitalIn(miso_pin); + sclk = new DigitalOut(sclk_pin); + format(8); + frequency(); +} + +SWSPI::~SWSPI() +{ + delete mosi; + delete miso; + delete sclk; +} + +void SWSPI::format(int bits, int mode) +{ + this->bits = bits; + this->mode = mode; + polarity = (mode >> 1) & 1; + phase = mode & 1; + sclk->write(polarity); +} + +void SWSPI::frequency(int hz) +{ + this->freq = hz; +} + +#pragma Otime + +int SWSPI::write(int value) +{ + int read = 0; + for (int bit = bits-1; bit >= 0; --bit) + { + mosi->write(((value >> bit) & 0x01) != 0); + + if (phase == 0) + { + if (miso->read()) + read |= (1 << bit); + } + + sclk->write(!polarity); + + wait_us(1000000/freq/2); + + if (phase == 1) + { + if (miso->read()) + read |= (1 << bit); + } + + sclk->write(polarity); + + wait_us(1000000/freq/2); + } + + return read; +} +