The SZ
embedded smtf7 based scope
Dependencies: BSP_DISCO_F746NG_patch_fixed mbed
Revision 0:0babd18ae684, committed 2015-11-18
- Comitter:
- the_sz
- Date:
- Wed Nov 18 14:31:49 2015 +0000
- Commit message:
- 1.01
Changed in this revision
diff -r 000000000000 -r 0babd18ae684 BSP_DISCO_F746NG_patch_fixed.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/BSP_DISCO_F746NG_patch_fixed.lib Wed Nov 18 14:31:49 2015 +0000 @@ -0,0 +1,1 @@ +https://developer.mbed.org/users/the_sz/code/BSP_DISCO_F746NG_patch_fixed/#3c0a51826ecc
diff -r 000000000000 -r 0babd18ae684 Interface.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Interface.h Wed Nov 18 14:31:49 2015 +0000
@@ -0,0 +1,62 @@
+#ifndef __Interface_h
+#define __Interface_h
+
+#pragma pack(1)
+
+#define BUFFER_SIZE 1000 // number of samples per HT_DATA report
+
+#define CHANNEL_COUNT 2
+#define HEADER_MAGIC 0x53636F70 // 'Scop'
+
+typedef enum
+{
+ HT_NONE,
+ HT_DATA,
+ HT_INFO_REQUEST,
+ HT_INFO_RESPONSE,
+ HT_CAPTURE_START,
+
+} HEADER_TYPE_ENUM;
+
+typedef struct
+{
+ float values[CHANNEL_COUNT];
+
+} VALUES_STRUCT;
+
+typedef struct
+{
+ uint32_t magic;
+ uint8_t type;
+ uint32_t length; // length in bytes of following data
+
+} HEADER_STRUCT;
+
+typedef struct
+{
+ uint8_t versionMajor;
+ uint8_t versionMinor;
+ char name[20];
+
+} INTERFACE_INFO_RESPONSE_STRUCT;
+
+typedef enum
+{
+ TM_NONE =0x00,
+ TM_RAISING =0x01,
+ TM_FALLING =0x02,
+ TM_AUTO =0x04,
+
+} TRIGGER_MODE_ENUM;
+
+typedef struct
+{
+ float triggerLevel;
+ uint8_t triggerMode;
+ uint16_t delay; // in usec
+
+} INTERFACE_CAPTURE_START_STRUCT;
+
+#pragma pack()
+
+#endif
diff -r 000000000000 -r 0babd18ae684 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Nov 18 14:31:49 2015 +0000
@@ -0,0 +1,229 @@
+#include "mbed.h"
+#include "stm32746g_discovery_lcd.h"
+
+#include "Interface.h"
+
+DigitalOut led(LED1);
+Serial serial(PA_9,PB_7); // serial 1
+AnalogIn analogIn1(A0);
+AnalogIn analogIn2(A1);
+VALUES_STRUCT buffer[BUFFER_SIZE];
+uint8_t commandBuffer[100];
+uint32_t commandLength;
+
+void sendBuffer(uint8_t *buffer,uint32_t length)
+{
+ while (length>0)
+ {
+ serial.putc(*buffer);
+
+ buffer++;
+ length--;
+ }
+}
+
+void sendCommand(HEADER_TYPE_ENUM type,uint8_t *buffer,uint32_t length)
+{
+ HEADER_STRUCT header;
+
+ header.magic=HEADER_MAGIC;
+ header.type=type;
+ header.length=length;
+
+ sendBuffer((uint8_t *)&header,sizeof(header));
+ sendBuffer(buffer,length);
+}
+
+bool readWithTimeout(uint8_t *buffer)
+{
+ uint32_t counter;
+
+ counter=0;
+ while (counter<10000)
+ {
+ if (serial.readable())
+ {
+ (*buffer)=serial.getc();
+ return true;
+ }
+
+ wait_us(50);
+
+ counter++;
+ }
+
+ // re-init serial port
+ serial.baud(115200);
+
+ return false;
+}
+
+HEADER_TYPE_ENUM readCommand(void)
+{
+ HEADER_STRUCT *header;
+ uint32_t index;
+ HEADER_TYPE_ENUM type;
+
+ for (index=0;index<sizeof(HEADER_STRUCT);index++)
+ {
+ if (readWithTimeout(&commandBuffer[index])==false)
+ return HT_NONE;
+ }
+
+ header=(HEADER_STRUCT *)commandBuffer;
+ if (header->magic!=HEADER_MAGIC)
+ return HT_NONE;
+
+ type=(HEADER_TYPE_ENUM)header->type;
+
+ if (header->length>0)
+ {
+ commandLength=header->length;
+
+ for (index=0;index<commandLength;index++)
+ {
+ if (readWithTimeout(&commandBuffer[index])==false)
+ return HT_NONE;
+ }
+ }
+
+ return type;
+}
+
+int main()
+{
+ int32_t index;
+ int32_t indexPrevious;
+ int32_t stop;
+ HEADER_TYPE_ENUM type;
+ bool capture;
+ float triggerLevel;
+ uint8_t triggerMode;
+ uint16_t delay;
+ bool triggered;
+
+ serial.baud(115200);
+
+ BSP_LCD_Init();
+ BSP_LCD_DisplayOff();
+
+ capture=false;
+ triggerLevel=0.0;
+ triggerMode=TM_NONE;
+ delay=0;
+
+ for (;;)
+ {
+ if (serial.readable())
+ {
+ type=readCommand();
+ switch (type)
+ {
+ case HT_INFO_REQUEST:
+ {
+ INTERFACE_INFO_RESPONSE_STRUCT InfoResponse;
+
+ memset(&InfoResponse,0,sizeof(InfoResponse));
+ InfoResponse.versionMajor=1;
+ InfoResponse.versionMinor=0;
+ snprintf(InfoResponse.name,sizeof(InfoResponse.name),"Scope");
+ sendCommand(HT_INFO_RESPONSE,(uint8_t *)&InfoResponse,sizeof(InfoResponse));
+ }
+ break;
+
+ case HT_CAPTURE_START:
+ {
+ INTERFACE_CAPTURE_START_STRUCT *captuerStart;
+
+ if (commandLength==sizeof(INTERFACE_CAPTURE_START_STRUCT))
+ {
+ captuerStart=(INTERFACE_CAPTURE_START_STRUCT *)commandBuffer;
+
+ triggerLevel=captuerStart->triggerLevel;
+ triggerMode=captuerStart->triggerMode;
+ delay=captuerStart->delay;
+
+ // seems our measurement loop needs 5 µs per loop
+ if (delay>5)
+ delay-=5;
+
+ capture=true;
+ }
+ }
+ break;
+ }
+ }
+
+ if (capture==true)
+ {
+ led=1;
+
+ // dummy read for nicer results
+ for (index=0;index<5;index++)
+ {
+ analogIn1.read();
+ analogIn2.read();
+ }
+
+ stop=0;
+ index=0;
+ indexPrevious=0;
+ triggered=false;
+ for (;;)
+ {
+ buffer[index].values[0]=analogIn1.read();
+ buffer[index].values[1]=analogIn2.read();
+
+ // check for trigger
+ if ((triggered==false) && (index>(BUFFER_SIZE/2)))
+ {
+ // we trigger only on channel 1
+ if ((triggerMode & TM_RAISING)!=0)
+ if (buffer[indexPrevious].values[0]<triggerLevel)
+ if (buffer[index].values[0]>=triggerLevel)
+ triggered=true;
+ if ((triggerMode & TM_FALLING)!=0)
+ if (buffer[indexPrevious].values[0]>triggerLevel)
+ if (buffer[index].values[0]<=triggerLevel)
+ triggered=true;
+
+ if (triggered==true)
+ stop=(index + (BUFFER_SIZE / 2)) % BUFFER_SIZE;
+ }
+
+ indexPrevious=index;
+
+ index++;
+ if (index>=BUFFER_SIZE)
+ index=0;
+
+ if (index==stop)
+ break;
+
+ wait_us(delay);
+ }
+
+ led=0;
+ capture=false;
+
+ if ((triggered==true) || ((triggerMode & TM_AUTO)!=0))
+ {
+ HEADER_STRUCT header;
+
+ header.magic=HEADER_MAGIC;
+ header.type=HT_DATA;
+ header.length=sizeof(buffer);
+
+ // send header
+ sendBuffer((uint8_t *)&header,sizeof(header));
+ // send part 1
+ sendBuffer((uint8_t *)&buffer[stop],((BUFFER_SIZE-stop)*sizeof(VALUES_STRUCT)));
+ // send part 2
+ if (stop>0)
+ sendBuffer((uint8_t *)&buffer[0],(stop*sizeof(VALUES_STRUCT)));
+ }
+ else
+ sendCommand(HT_DATA,(uint8_t *)&buffer,0);
+ }
+ }
+}
diff -r 000000000000 -r 0babd18ae684 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Nov 18 14:31:49 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/9296ab0bfc11 \ No newline at end of file