DigitalInfinity/ESP32-PaxCounter
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AXP192 low level I2C mutexing

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This commit is contained in:
Verkehrsrot 2019-09-30 12:35:03 +02:00
parent 58ed680a92
commit c93b0867a9
2 changed files with 121 additions and 93 deletions
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2
include/power.h
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@ -19,6 +19,8 @@ void power_event_IRQ(void);
void AXP192_power(bool on);
void AXP192_init(void);
void AXP192_showstatus(void);
uint8_t i2c_writeBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
uint8_t i2c_readBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len);
#endif // HAS_PMU
#endif

82
src/power.cpp
View File

@ -11,12 +11,7 @@ AXP20X_Class pmu;
void power_event_IRQ(void) {
if (!I2C_MUTEX_LOCK())
ESP_LOGW(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
else {
pmu.readIRQ();
// put your power event handler code here
if (pmu.isVbusOverVoltageIRQ())
ESP_LOGI(TAG, "USB voltage %.2fV too high.", pmu.getVbusVoltage() / 1000);
@ -51,8 +46,6 @@ void power_event_IRQ(void) {
}
pmu.clearIRQ();
I2C_MUTEX_UNLOCK();
} // mutex
// refresh stored voltage value
read_voltage();
@ -75,10 +68,6 @@ void AXP192_power(bool on) {
void AXP192_showstatus(void) {
if (!I2C_MUTEX_LOCK())
ESP_LOGW(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
else {
if (pmu.isBatteryConnect())
if (pmu.isChargeing())
ESP_LOGI(TAG, "Battery charging, %.2fV @ %.0fmAh",
@ -93,17 +82,11 @@ void AXP192_showstatus(void) {
pmu.getVbusVoltage() / 1000 * pmu.getVbusCurrent());
else
ESP_LOGI(TAG, "USB not present");
I2C_MUTEX_UNLOCK();
} // mutex
}
void AXP192_init(void) {
// block i2c bus access
if (I2C_MUTEX_LOCK()) {
if (pmu.begin(Wire, AXP192_PRIMARY_ADDRESS))
if (pmu.begin(i2c_readBytes, i2c_writeBytes, AXP192_PRIMARY_ADDRESS) == AXP_FAIL)
ESP_LOGI(TAG, "AXP192 PMU initialization failed");
else {
@ -121,8 +104,6 @@ void AXP192_init(void) {
// switch power rails on
AXP192_power(true);
// I2C access of AXP202X library currently is not mutexable
// so we better should disable AXP interrupts... ?
#ifdef PMU_INT
pinMode(PMU_INT, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(PMU_INT), PMUIRQ, FALLING);
@ -135,10 +116,55 @@ void AXP192_init(void) {
ESP_LOGI(TAG, "AXP192 PMU initialized");
}
I2C_MUTEX_UNLOCK(); // release i2c bus access
} else
ESP_LOGE(TAG, "I2c bus busy - PMU initialization error");
}
// helper functions for mutexing i2c access
uint8_t i2c_readBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len) {
if (I2C_MUTEX_LOCK()) {
uint8_t ret = 0;
Wire.beginTransmission(addr);
Wire.write(reg);
Wire.endTransmission(false);
uint8_t cnt = Wire.requestFrom(addr, (uint8_t)len, (uint8_t)1);
if (!cnt) {
ret = 0xFF;
}
uint16_t index = 0;
while (Wire.available()) {
if (index > len)
return 0xFF;
data[index++] = Wire.read();
}
I2C_MUTEX_UNLOCK(); // release i2c bus access
return ret;
} else {
ESP_LOGW(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
return 0xFF;
}
}
uint8_t i2c_writeBytes(uint8_t addr, uint8_t reg, uint8_t *data, uint8_t len) {
if (I2C_MUTEX_LOCK()) {
uint8_t ret = 0;
Wire.beginTransmission(addr);
Wire.write(reg);
for (uint16_t i = 0; i < len; i++) {
Wire.write(data[i]);
}
ret = Wire.endTransmission();
I2C_MUTEX_UNLOCK(); // release i2c bus access
return ret ? 0xFF : ret;
//return ret ? ret : 0xFF;
} else {
ESP_LOGW(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
return 0xFF;
}
}
#endif // HAS_PMU
#ifdef BAT_MEASURE_ADC
@ -196,12 +222,12 @@ uint16_t read_voltage() {
uint16_t voltage = 0;
#ifdef HAS_PMU
if (!I2C_MUTEX_LOCK())
ESP_LOGW(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
else {
// if (!I2C_MUTEX_LOCK())
// ESP_LOGW(TAG, "[%0.3f] i2c mutex lock failed", millis() / 1000.0);
// else {
voltage = pmu.isVBUSPlug() ? 0xffff : pmu.getBattVoltage();
I2C_MUTEX_UNLOCK();
}
// I2C_MUTEX_UNLOCK();
// }
#else
#ifdef BAT_MEASURE_ADC