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Fix the I2C dead-lock of the Master

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When some slave is unplugged suddenly this can lead to unresponsiveness of the driver. restart_I2C will continuously check this and assure that the driver will be reconfigured in case of a dead-lock.
This commit is contained in:
Santiago
2017-02-18 13:11:45 +01:00
committed by GitHub
parent 880981ac14
commit 226bc31385
3 changed files with 29 additions and 1 deletions
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23
right/src/init_peripherials.c
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@@ -6,6 +6,7 @@
#include "led_driver.h"
#include "merge_sensor.h"
#include "led_pwm.h"
#include "bridge_protocol_scheduler.h"
void InitI2c() {
port_pin_config_t pinConfig = {
@@ -44,6 +45,28 @@ void InitI2c() {
I2C_MasterInit(I2C_EEPROM_BUS_BASEADDR, &masterConfig, sourceClock);
}
/* This function is designed to restart and reinstall the I2C handler
* when a disconnection of the left side makes the Master I2C bus
* unresponsive */
void restartI2C(void) {
extern uint32_t I2C_Watchdog;
volatile uint32_t temp, counter;
uint32_t sourceClock;
i2c_master_config_t masterConfig;
temp = I2C_Watchdog; // We take the current value of I2C counter
for (counter = 0; counter < 10000000; counter++); // This can also be changed for 1 sec delay using PIT
if (I2C_Watchdog == temp) { // Restart I2C if there hasn't be any interrupt during 1 sec
I2C_MasterGetDefaultConfig(&masterConfig);
I2C_MasterDeinit(I2C_MAIN_BUS_BASEADDR);
sourceClock = CLOCK_GetFreq(I2C_MASTER_BUS_CLK_SRC);
I2C_MasterInit(I2C_MAIN_BUS_BASEADDR, &masterConfig, sourceClock);
InitBridgeProtocolScheduler();
}
}
void InitPeripherials(void)
{
InitResetButton();