Norimasa Okamoto
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
Last commit 20 Feb 2014 by 
Norimasa Okamoto
SWSPI/SWSPI.cpp@11:ad8af1047350, 2014-02-23 (annotated)
- Committer:
- va009039
- Date:
- Sun Feb 23 12:06:02 2014 +0000
- Revision:
- 11:ad8af1047350
- Child:
- 16:89d9621681a2
add SD card storage
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| va009039 | 11:ad8af1047350 | 1 | /* SWSPI, Software SPI library |
| va009039 | 11:ad8af1047350 | 2 | * Copyright (c) 2012-2014, David R. Van Wagner, http://techwithdave.blogspot.com |
| va009039 | 11:ad8af1047350 | 3 | * |
| va009039 | 11:ad8af1047350 | 4 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| va009039 | 11:ad8af1047350 | 5 | * of this software and associated documentation files (the "Software"), to deal |
| va009039 | 11:ad8af1047350 | 6 | * in the Software without restriction, including without limitation the rights |
| va009039 | 11:ad8af1047350 | 7 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| va009039 | 11:ad8af1047350 | 8 | * copies of the Software, and to permit persons to whom the Software is |
| va009039 | 11:ad8af1047350 | 9 | * furnished to do so, subject to the following conditions: |
| va009039 | 11:ad8af1047350 | 10 | * |
| va009039 | 11:ad8af1047350 | 11 | * The above copyright notice and this permission notice shall be included in |
| va009039 | 11:ad8af1047350 | 12 | * all copies or substantial portions of the Software. |
| va009039 | 11:ad8af1047350 | 13 | * |
| va009039 | 11:ad8af1047350 | 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| va009039 | 11:ad8af1047350 | 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| va009039 | 11:ad8af1047350 | 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| va009039 | 11:ad8af1047350 | 17 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| va009039 | 11:ad8af1047350 | 18 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| va009039 | 11:ad8af1047350 | 19 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| va009039 | 11:ad8af1047350 | 20 | * THE SOFTWARE. |
| va009039 | 11:ad8af1047350 | 21 | */ |
| va009039 | 11:ad8af1047350 | 22 | |
| va009039 | 11:ad8af1047350 | 23 | #include <mbed.h> |
| va009039 | 11:ad8af1047350 | 24 | #include "SWSPI.h" |
| va009039 | 11:ad8af1047350 | 25 | |
| va009039 | 11:ad8af1047350 | 26 | SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin) |
| va009039 | 11:ad8af1047350 | 27 | { |
| va009039 | 11:ad8af1047350 | 28 | mosi = new DigitalOut(mosi_pin); |
| va009039 | 11:ad8af1047350 | 29 | miso = new DigitalIn(miso_pin); |
| va009039 | 11:ad8af1047350 | 30 | sclk = new DigitalOut(sclk_pin); |
| va009039 | 11:ad8af1047350 | 31 | format(8); |
| va009039 | 11:ad8af1047350 | 32 | frequency(); |
| va009039 | 11:ad8af1047350 | 33 | } |
| va009039 | 11:ad8af1047350 | 34 | |
| va009039 | 11:ad8af1047350 | 35 | SWSPI::~SWSPI() |
| va009039 | 11:ad8af1047350 | 36 | { |
| va009039 | 11:ad8af1047350 | 37 | delete mosi; |
| va009039 | 11:ad8af1047350 | 38 | delete miso; |
| va009039 | 11:ad8af1047350 | 39 | delete sclk; |
| va009039 | 11:ad8af1047350 | 40 | } |
| va009039 | 11:ad8af1047350 | 41 | |
| va009039 | 11:ad8af1047350 | 42 | void SWSPI::format(int bits, int mode) |
| va009039 | 11:ad8af1047350 | 43 | { |
| va009039 | 11:ad8af1047350 | 44 | this->bits = bits; |
| va009039 | 11:ad8af1047350 | 45 | this->mode = mode; |
| va009039 | 11:ad8af1047350 | 46 | polarity = (mode >> 1) & 1; |
| va009039 | 11:ad8af1047350 | 47 | phase = mode & 1; |
| va009039 | 11:ad8af1047350 | 48 | sclk->write(polarity); |
| va009039 | 11:ad8af1047350 | 49 | } |
| va009039 | 11:ad8af1047350 | 50 | |
| va009039 | 11:ad8af1047350 | 51 | void SWSPI::frequency(int hz) |
| va009039 | 11:ad8af1047350 | 52 | { |
| va009039 | 11:ad8af1047350 | 53 | this->freq = hz; |
| va009039 | 11:ad8af1047350 | 54 | } |
| va009039 | 11:ad8af1047350 | 55 | |
| va009039 | 11:ad8af1047350 | 56 | #pragma Otime |
| va009039 | 11:ad8af1047350 | 57 | |
| va009039 | 11:ad8af1047350 | 58 | int SWSPI::write(int value) |
| va009039 | 11:ad8af1047350 | 59 | { |
| va009039 | 11:ad8af1047350 | 60 | int read = 0; |
| va009039 | 11:ad8af1047350 | 61 | for (int bit = bits-1; bit >= 0; --bit) |
| va009039 | 11:ad8af1047350 | 62 | { |
| va009039 | 11:ad8af1047350 | 63 | mosi->write(((value >> bit) & 0x01) != 0); |
| va009039 | 11:ad8af1047350 | 64 | |
| va009039 | 11:ad8af1047350 | 65 | if (phase == 0) |
| va009039 | 11:ad8af1047350 | 66 | { |
| va009039 | 11:ad8af1047350 | 67 | if (miso->read()) |
| va009039 | 11:ad8af1047350 | 68 | read |= (1 << bit); |
| va009039 | 11:ad8af1047350 | 69 | } |
| va009039 | 11:ad8af1047350 | 70 | |
| va009039 | 11:ad8af1047350 | 71 | sclk->write(!polarity); |
| va009039 | 11:ad8af1047350 | 72 | |
| va009039 | 11:ad8af1047350 | 73 | wait_us(1000000/freq/2); |
| va009039 | 11:ad8af1047350 | 74 | |
| va009039 | 11:ad8af1047350 | 75 | if (phase == 1) |
| va009039 | 11:ad8af1047350 | 76 | { |
| va009039 | 11:ad8af1047350 | 77 | if (miso->read()) |
| va009039 | 11:ad8af1047350 | 78 | read |= (1 << bit); |
| va009039 | 11:ad8af1047350 | 79 | } |
| va009039 | 11:ad8af1047350 | 80 | |
| va009039 | 11:ad8af1047350 | 81 | sclk->write(polarity); |
| va009039 | 11:ad8af1047350 | 82 | |
| va009039 | 11:ad8af1047350 | 83 | wait_us(1000000/freq/2); |
| va009039 | 11:ad8af1047350 | 84 | } |
| va009039 | 11:ad8af1047350 | 85 | |
| va009039 | 11:ad8af1047350 | 86 | return read; |
| va009039 | 11:ad8af1047350 | 87 | } |
| va009039 | 11:ad8af1047350 | 88 |