Instantiating OdinWiFiInterface seems to be changing Thread behavior with I2C Slave #6122
Description
Note: This is just a template, so feel free to use/remove the unnecessary things
Description
- Type: Bug
- Priority: Blocker
Bug
Target
UBLOX_EVK_ODIN_W2
Toolchain:
GCC_ARM
Toolchain version:
arm-none-eabi-g++ (Fedora 7.1.0-2.fc26) 7.1.0
mbed-cli version:
1.4.0
mbed-os sha:
caeaa49 (HEAD, tag: mbed-os-5.7.4, tag: latest) Merge pull request #5954 from ARMmbed/release-candidate
DAPLink version:
Expected behavior
I have two threads, the first runs i2cslave and just prints what it gets from the master and the second thread prints a simple string and then sleeps for 1 second. Both threads are in infinite loop.
Execution 1 - When I run this program, everything runs just fine.
Execution 2 - When I add an global OdinWiFiInterface instance, I expected both thread to keep running and showing the printf results on the serial.
Actual behavior
On execution 2, the i2C slave thread seems to be starving the second thread. I don't see the printf from the second thread anymore.
Steps to reproduce
Run the following code:
#include "mbed.h"
#include "rtos.h"
#include "OdinWiFiInterface.h"
#define I2C_ADDRESS 0x25
Thread t1, thread_i2c_slave;
// To reproduce execution 1, comment the line above.
OdinWiFiInterface wifi; // During execution 2, I have instanced a OdinWiFiInterface object.
void func_t1()
{
for (int i = 0;; i++) {
printf("FUNC_T1 ============\n%d\n==============\n\n", i);
Thread::wait(1000);
}
}
void i2c_slave()
{
I2CSlave slave(PF_0, PF_1);
int count = 0;
char buf[10];
char msg[] = "Slave!";
slave.address(I2C_ADDRESS);
while (1) {
int i = slave.receive();
count++;
switch (i) {
case I2CSlave::ReadAddressed:
slave.write(msg, strlen(msg) + 1); // Includes null char
break;
case I2CSlave::WriteGeneral:
slave.read(buf, 10);
printf("Read G: %s\n", buf);
break;
case I2CSlave::WriteAddressed:
slave.read(buf, 10);
printf("Read A: strlen %d. ", strlen(buf));
for (unsigned int c =0; c < strlen(buf); c++) {
printf("%X ", buf[c]);
}
printf("\n");
printf("count: %d\n", count);
break;
}
for(int i = 0; i < 10; i++) buf[i] = 0; // Clear buffer
}
}
int main()
{
printf("BEGIN\n");
printf("starting threads\n");
t1.start(func_t1);
thread_i2c_slave.start(i2c_slave);
t1.join();
thread_i2c_slave.join();
return 0;
}Output on the execution 1:
BEGIN
starting threads
FUNC_T1 ============
0
==============
Read A: strlen 4. 1 61 62 63
count: 749070
Read A: strlen 4. 1 61 62 63
count: 1602034
FUNC_T1 ============
1
==============
Read A: strlen 4. 1 61 62 63
count: 2386922
Read A: strlen 4. 1 61 62 63
count: 3237849
FUNC_T1 ============
2
==============
Read A: strlen 4. 1 61 62 63
count: 4022860
Read A: strlen 4. 1 61 62 63
count: 4873974
FUNC_T1 ============
3
==============
Read A: strlen 4. 1 61 62 63
count: 5658975
Read A: strlen 4. 1 61 62 63
count: 6510014
FUNC_T1 ============
4
==============
Read A: strlen 4. 1 61 62 63
count: 7294943
Read A: strlen 4. 1 61 62 63
count: 8145975
FUNC_T1 ============
5
==============
Read A: strlen 4. 1 61 62 63
count: 8930893
Read A: strlen 4. 1 61 62 63
count: 9781846
Output on execution 2:
BEGIN
starting threads
FUNC_T1 ============
0
==============
Read A: strlen 4. 1 61 62 63
count: 139268
Read A: strlen 4. 1 61 62 63
count: 952623
Read A: strlen 4. 1 61 62 63
count: 1778385
Read A: strlen 4. 1 61 62 63
count: 2602818
Read A: strlen 4. 1 61 62 63
count: 3429469
Read A: strlen 4. 1 61 62 63
count: 4258486
Read A: strlen 4. 1 61 62 63
count: 5087584
Read A: strlen 4. 1 61 62 63
count: 5912158
Read A: strlen 4. 1 61 62 63
count: 6738882
Read A: strlen 4. 1 61 62 63
count: 7568029
Read A: strlen 4. 1 61 62 63
count: 8397041
Read A: strlen 4. 1 61 62 63
count: 9225966
Read A: strlen 4. 1 61 62 63
count: 10054951
Read A: strlen 4. 1 61 62 63
count: 10882079
Read A: strlen 4. 1 61 62 63
count: 11709333
Read A: strlen 4. 1 61 62 63
count: 12536402
Read A: strlen 4. 1 61 62 63
count: 13363531
Read A: strlen 4. 1 61 62 63
count: 14190524
Read A: strlen 4. 1 61 62 63
count: 15017642
Read A: strlen 4. 1 61 62 63
count: 15844821
Read A: strlen 4. 1 61 62 63
count: 16671864
Question
How can I make the threads work while using OdinWiFiInterface?