Gaston Salazar-Silva
A simple example of a serial communication interface for setting variables in an Mbed program with help of mydsc library.
Revision 4:e315db7c4dea, committed 2020-03-28
- Comitter:
- ghsalazar
- Date:
- Sat Mar 28 16:09:30 2020 +0000
- Parent:
- 3:584c4d2d10aa
- Commit message:
- Initial commit
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mydsc.lib | Show annotated file Show diff for this revision Revisions of this file |
--- a/main.cpp Mon Mar 09 15:56:50 2020 +0000
+++ b/main.cpp Sat Mar 28 16:09:30 2020 +0000
@@ -6,102 +6,127 @@
#include "mbed.h"
#include "stdio.h"
#include "stdlib.h"
+#include "string.h"
#include "ctype.h"
#include "mydsc_kvp.h"
+#include "mydsc_error.h"
-const unsigned VALUE_SIZE = 128;
+// Hardware Interface
+DigitalOut led (LED1);
+Serial serial (USBTX, USBRX);
+InterruptIn button (USER_BUTTON);
+
+
+// Behavior interface
+const unsigned MESSAGE_MAX_LEN = 126;
+const char END_OF_LINE = 015;
+const unsigned VALUE_SIZE = 128;
+const unsigned short BUFFER_SIZE = 128;
+
+unsigned long delay = 5000000UL;
+
+char message[MESSAGE_MAX_LEN+2];
+
+volatile bool semaphore_input = false;
+volatile bool semaphore_button = false;
+
+// This set of functions are callbacks
-float kp = 0;
-float ki = 0;
+void on_rx()
+{
+ static char c;
+ static unsigned index = 0;
+
+ c = serial.getc();
+ message[index] = c;
+ index++;
+ message[index] = '\0';
+ if ((END_OF_LINE == c) || (MESSAGE_MAX_LEN+1) == index) {
+ semaphore_input = true;
+ index = 0;
+ }
+}
-char* get_proportional(void)
+void on_user_button()
+{
+ semaphore_button = !semaphore_button;
+ serial.printf("\r\n%s\r\nOk > ", (semaphore_button? "Paused": "Running"));
+}
+
+char* get_delay(void)
{
static char value[VALUE_SIZE];
- sprintf(value, "%f", kp);
+ sprintf(value, "%lu", delay);
return value;
}
-int set_proportional(char* value)
-{
- sscanf(value, "%f", &kp);
- return MYDSC_KVP_SUCCESS;
-}
-
-char* get_integral(void)
+int set_delay(char* value)
{
- static char value[VALUE_SIZE];
-
- sprintf(value, "%f", ki);
- return value;
-}
-
-int set_integral(char* value)
-{
- sscanf(value, "%f", &ki);
- return MYDSC_KVP_SUCCESS;
+ sscanf(value, "%lu", &delay);
+ return MYDSC_SUCCESS;
}
int main()
{
// Setup
- const unsigned short BUFFER_SIZE = 128;
- static char command_buffer[BUFFER_SIZE];
- static char key_buffer[BUFFER_SIZE];
- static char value_buffer[BUFFER_SIZE];
+ static char command_buffer[BUFFER_SIZE];
+ static char key_buffer[BUFFER_SIZE];
+ static char value_buffer[BUFFER_SIZE];
+ long unsigned delay_count = delay;
Serial serial(USBTX, USBRX);
serial.baud(9600);
- serial.format(8, SerialBase::None, 1);
serial.printf("\r\nHello, world!");
+ // Setting the key-value list up
mydsc_kvp_t kvp;
mydsc_kvp_init(&kvp);
- mydsc_kvp_append(&kvp, "proportional", &get_proportional,
- &set_proportional);
- mydsc_kvp_append(&kvp, "integral", &get_integral, &set_integral);
- serial.printf("\r\nVersion:\t%s", mydsc_kvp_get_value(&kvp, "version"));
+
+ // Setting the callbacks up
+ serial.attach(&on_rx, Serial::RxIrq);
+ button.fall(&on_user_button);
+ mydsc_kvp_append(&kvp, "delay", &get_delay, &set_delay);
+ serial.printf("\r\nOK > ");
+
+ led = 1;
while(1) {
// Loop
int result = 0;
char* value = "";
- serial.printf("\r\n> ");
-
- serial.scanf("%s",command_buffer);
- if (strcmp(command_buffer, "set") == 0) {
- serial.scanf("%s",key_buffer);
- serial.scanf("%s",value_buffer);
- result = mydsc_kvp_set_value(&kvp, key_buffer, value_buffer);
-
- if (result == MYDSC_KVP_SUCCESS)
- serial.printf("\r\nOk");
- else if (result == MYDSC_KVP_NO_SET)
- serial.printf("\r\nError: Value can't be changed");
- else if (result == MYDSC_KVP_NO_KEY)
- serial.printf("\r\nError: There isn't such setting");
- else if (result == MYDSC_KVP_WRONG_VALUE)
- serial.printf("\r\nError: The value is wrong");
+ if (semaphore_input == true) {
+ semaphore_input = false;
+ strcpy(command_buffer, strtok(message," \015"));
+ if (strcmp(command_buffer, "set") == 0) {
+ strcpy(key_buffer, strtok(NULL," \015"));
+ strcpy(value_buffer, strtok(NULL, " \015"));
+ result = mydsc_kvp_set_value(&kvp, key_buffer, value_buffer);
+ if (result != MYDSC_SUCCESS)
+ serial.printf("\r\nError: %s", mydsc_error[result]);
+ }
+ else if (strcmp(command_buffer,"get") == 0) {
+ strcpy(key_buffer, strtok(NULL," \015"));
+ value = mydsc_kvp_get_value(&kvp,key_buffer);
+ if (NULL != value)
+ serial.printf("\r\n%s", value);
+ else
+ serial.printf("\r\nError: %s", mydsc_error[MYDSC_KVP_NO_KEY]);
+ }
+ else if (strcmp(command_buffer,"help") == 0) {
+ serial.printf("\r\nAvailable commands are: get help set");
+ }
else
- serial.printf("\r\nError: Unknown error");
+ serial.printf("\r\nError: %s doesn't exist\r\n", command_buffer);
+ serial.printf("\r\nOk > ");
}
-
- else if (strcmp(command_buffer,"get") == 0) {
- serial.scanf("%s",key_buffer);
- value = mydsc_kvp_get_value(&kvp,key_buffer);
- if (NULL != value)
- serial.printf("\r\n%s", value);
- else
- serial.printf("\r\nError: There isn't such setting");
- serial.printf("\r\nOk");
+ if (!delay_count) {
+ led = !led;
+ delay_count = delay;
}
- else if (strcmp(command_buffer,"help") == 0) {
- serial.printf("\r\nAvailable commands are: get help set");
- serial.printf("\r\nOk");
- }
- else
- serial.printf("\r\nError: %s doesn't exist\r\n", command_buffer);
+ if (!semaphore_button)
+ delay_count--;
}
}
--- a/mydsc.lib Mon Mar 09 15:56:50 2020 +0000 +++ b/mydsc.lib Sat Mar 28 16:09:30 2020 +0000 @@ -1,1 +1,1 @@ -https://os.mbed.com/users/ghsalazar/code/mydsc/#b780db800303 +https://os.mbed.com/users/ghsalazar/code/mydsc/#90c3f1288d41