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
Revision 16:89d9621681a2, committed 2014-05-03
- Comitter:
- va009039
- Date:
- Sat May 03 03:46:26 2014 +0000
- Parent:
- 15:d977d224189f
- Child:
- 17:4e1205ce031f
- Commit message:
- fast SWSPI
Changed in this revision
--- a/SWSPI/SWSPI.cpp Mon Apr 28 06:01:06 2014 +0000
+++ b/SWSPI/SWSPI.cpp Sat May 03 03:46:26 2014 +0000
@@ -23,7 +23,7 @@
#include <mbed.h>
#include "SWSPI.h"
-SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin)
+SWSPI::SWSPI(PinName mosi_pin, PinName miso_pin, PinName sclk_pin):_fast(false)
{
mosi = new DigitalOut(mosi_pin);
miso = new DigitalIn(miso_pin);
@@ -51,12 +51,16 @@
void SWSPI::frequency(int hz)
{
this->freq = hz;
+ _fast = (hz >= 1000000) ? true : false;
}
#pragma Otime
int SWSPI::write(int value)
{
+ if (_fast) {
+ return fast_write(value);
+ }
int read = 0;
for (int bit = bits-1; bit >= 0; --bit)
{
@@ -86,3 +90,17 @@
return read;
}
+uint8_t SWSPI::fast_write(uint8_t value)
+{
+ uint8_t data = 0;
+ for(uint8_t mask = 0x80; mask; mask >>= 1) {
+ mosi->write((value & mask) ? 1 : 0);
+ if (miso->read()) {
+ data |= mask;
+ }
+ sclk->write(1);
+ sclk->write(0);
+ }
+ return data;
+}
+
--- a/SWSPI/SWSPI.h Mon Apr 28 06:01:06 2014 +0000
+++ b/SWSPI/SWSPI.h Sat May 03 03:46:26 2014 +0000
@@ -49,6 +49,7 @@
class SWSPI
{
private:
+ uint8_t fast_write(uint8_t value);
DigitalOut* mosi;
DigitalIn* miso;
DigitalOut* sclk;
@@ -58,6 +59,7 @@
int polarity; // idle clock value
int phase; // 0=sample on leading (first) clock edge, 1=trailing (second)
int freq;
+ bool _fast;
public:
/** Create SWSPI object
--- a/mbed.bld Mon Apr 28 06:01:06 2014 +0000 +++ b/mbed.bld Sat May 03 03:46:26 2014 +0000 @@ -1,1 +1,1 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/6473597d706e \ No newline at end of file +http://mbed.org/users/mbed_official/code/mbed/builds/8a40adfe8776 \ No newline at end of file