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Merge branch 'bugfix/i2c_ack_error_bug' into 'master'

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driver(i2c):  Fixed i2c interrupt wdt timeout bug

See merge request idf/esp-idf!2049
This commit is contained in:
Ivan Grokhotkov 2018-03-27 12:29:23 +08:00
commit 892f3907fa
1 changed files with 33 additions and 24 deletions
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57
components/driver/i2c.c
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@ -40,7 +40,6 @@ static portMUX_TYPE i2c_spinlock[I2C_NUM_MAX] = {portMUX_INITIALIZER_UNLOCKED, p
/* DRAM_ATTR is required to avoid I2C array placed in flash, due to accessed from ISR */
static DRAM_ATTR i2c_dev_t* const I2C[I2C_NUM_MAX] = { &I2C0, &I2C1 };
#define I2C_ENTER_CRITICAL_ISR(mux) portENTER_CRITICAL_ISR(mux)
#define I2C_EXIT_CRITICAL_ISR(mux) portEXIT_CRITICAL_ISR(mux)
#define I2C_ENTER_CRITICAL(mux) portENTER_CRITICAL(mux)
@ -78,6 +77,7 @@ static DRAM_ATTR i2c_dev_t* const I2C[I2C_NUM_MAX] = { &I2C0, &I2C1 };
#define I2C_SLAVE_SDA_SAMPLE_DEFAULT (10) /* I2C slave sample time after scl positive edge default value */
#define I2C_SLAVE_SDA_HOLD_DEFAULT (10) /* I2C slave hold time after scl negative edge default value */
#define I2C_MASTER_TOUT_CNUM_DEFAULT (8) /* I2C master timeout cycle number of I2C clock, after which the timeout interrupt will be triggered */
#define I2C_ACKERR_CNT_MAX (10)
typedef struct {
uint8_t byte_num; /*!< cmd byte number */
@ -367,6 +367,7 @@ static void IRAM_ATTR i2c_isr_handler_default(void* arg)
} else if (status & I2C_RX_REC_FULL_INT_ST_M) {
I2C[i2c_num]->int_clr.rx_rec_full = 1;
} else if (status & I2C_ACK_ERR_INT_ST_M) {
I2C[i2c_num]->int_ena.ack_err = 0;
I2C[i2c_num]->int_clr.ack_err = 1;
if (p_i2c->mode == I2C_MODE_MASTER) {
p_i2c_obj[i2c_num]->status = I2C_STATUS_ACK_ERROR;
@ -377,6 +378,7 @@ static void IRAM_ATTR i2c_isr_handler_default(void* arg)
} else if (status & I2C_TRANS_START_INT_ST_M) {
I2C[i2c_num]->int_clr.trans_start = 1;
} else if (status & I2C_TIME_OUT_INT_ST_M) {
I2C[i2c_num]->int_ena.time_out = 0;
I2C[i2c_num]->int_clr.time_out = 1;
p_i2c_obj[i2c_num]->status = I2C_STATUS_TIMEOUT;
i2c_master_cmd_begin_static(i2c_num);
@ -388,12 +390,10 @@ static void IRAM_ATTR i2c_isr_handler_default(void* arg)
p_i2c->data_buf[idx] = I2C[i2c_num]->fifo_data.data;
}
xRingbufferSendFromISR(p_i2c->rx_ring_buf, p_i2c->data_buf, rx_fifo_cnt, &HPTaskAwoken);
if (HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR();
}
I2C[i2c_num]->int_clr.rx_fifo_full = 1;
} else {
if (p_i2c->status != I2C_STATUS_ACK_ERROR) {
// add check for unexcepted situations caused by noise.
if (p_i2c->status != I2C_STATUS_ACK_ERROR && p_i2c->status != I2C_STATUS_IDLE) {
i2c_master_cmd_begin_static(i2c_num);
}
}
@ -420,9 +420,6 @@ static void IRAM_ATTR i2c_isr_handler_default(void* arg)
WRITE_PERI_REG(I2C_DATA_APB_REG(i2c_num), data[idx]);
}
vRingbufferReturnItemFromISR(p_i2c->tx_ring_buf, data, &HPTaskAwoken);
if (HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR();
}
I2C[i2c_num]->int_ena.tx_fifo_empty = 1;
I2C[i2c_num]->int_clr.tx_fifo_empty = 1;
} else {
@ -435,9 +432,6 @@ static void IRAM_ATTR i2c_isr_handler_default(void* arg)
p_i2c->data_buf[idx] = I2C[i2c_num]->fifo_data.data;
}
xRingbufferSendFromISR(p_i2c->rx_ring_buf, p_i2c->data_buf, rx_fifo_cnt, &HPTaskAwoken);
if (HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR();
}
I2C[i2c_num]->int_clr.rx_fifo_full = 1;
} else {
I2C[i2c_num]->int_clr.val = status;
@ -447,9 +441,10 @@ static void IRAM_ATTR i2c_isr_handler_default(void* arg)
i2c_cmd_evt_t evt;
evt.type = I2C_CMD_EVT_ALIVE;
xQueueSendFromISR(p_i2c->cmd_evt_queue, &evt, &HPTaskAwoken);
if (HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR();
}
}
//We only need to check here if there is a high-priority task needs to be switched.
if(HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR();
}
}
@ -497,19 +492,17 @@ static esp_err_t i2c_master_clear_bus(i2c_port_t i2c_num)
int sda_io = GPIO.func_in_sel_cfg[sda_in_sig].func_sel;
I2C_CHECK((GPIO_IS_VALID_OUTPUT_GPIO(scl_io)), I2C_SCL_IO_ERR_STR, ESP_ERR_INVALID_ARG);
I2C_CHECK((GPIO_IS_VALID_GPIO(sda_io)), I2C_SDA_IO_ERR_STR, ESP_ERR_INVALID_ARG);
if (gpio_get_level(sda_io) == 1) {
return ESP_OK;
}
// We do not check whether the SDA line is low
// because after some serious interference, the bus may keep high all the time and the i2c bus is out of service.
gpio_set_direction(scl_io, GPIO_MODE_OUTPUT_OD);
gpio_set_direction(sda_io, GPIO_MODE_OUTPUT_OD);
gpio_set_level(scl_io, 0);
gpio_set_level(scl_io, 1);
gpio_set_level(sda_io, 1);
gpio_set_level(sda_io, 0);
for (int i = 0; i < 9; i++) {
gpio_set_level(scl_io, 1);
gpio_set_level(scl_io, 0);
gpio_set_level(scl_io, 1);
}
gpio_set_level(scl_io, 1);
gpio_set_level(sda_io, 1);
i2c_set_pin(i2c_num, sda_io, scl_io, 1, 1, I2C_MODE_MASTER);
return ESP_OK;
@ -583,6 +576,8 @@ esp_err_t i2c_param_config(i2c_port_t i2c_num, const i2c_config_t* i2c_conf)
if (ret != ESP_OK) {
return ret;
}
// Reset the I2C hardware in case there is a soft reboot.
i2c_hw_disable(i2c_num);
i2c_hw_enable(i2c_num);
I2C_ENTER_CRITICAL(&i2c_spinlock[i2c_num]);
I2C[i2c_num]->ctr.rx_lsb_first = I2C_DATA_MODE_MSB_FIRST; //set rx data msb first
@ -1047,7 +1042,7 @@ static void IRAM_ATTR i2c_master_cmd_begin_static(i2c_port_t i2c_num)
portYIELD_FROM_ISR();
}
return;
} else if (p_i2c->status == I2C_STATUS_READ) {
} else if (p_i2c->cmd_link.head != NULL && p_i2c->status == I2C_STATUS_READ) {
i2c_cmd_t *cmd = &p_i2c->cmd_link.head->cmd;
while (p_i2c->rx_cnt-- > 0) {
*cmd->data++ = READ_PERI_REG(I2C_DATA_APB_REG(i2c_num));
@ -1066,6 +1061,8 @@ static void IRAM_ATTR i2c_master_cmd_begin_static(i2c_port_t i2c_num)
if (HPTaskAwoken == pdTRUE) {
portYIELD_FROM_ISR();
}
// Return to the IDLE status after cmd_eve_done signal were send out.
p_i2c->status = I2C_STATUS_IDLE;
return;
}
while (p_i2c->cmd_link.head) {
@ -1121,7 +1118,6 @@ static void IRAM_ATTR i2c_master_cmd_begin_static(i2c_port_t i2c_num)
if (p_i2c->cmd_link.head == NULL || p_i2c->cmd_idx >= 15) {
p_i2c->tx_fifo_remain = I2C_FIFO_LEN;
p_i2c->cmd_idx = 0;
p_i2c->status = I2C_STATUS_IDLE;
break;
}
}
@ -1139,6 +1135,8 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
I2C_CHECK(p_i2c_obj[i2c_num]->mode == I2C_MODE_MASTER, I2C_MASTER_MODE_ERR_STR, ESP_ERR_INVALID_STATE);
I2C_CHECK(cmd_handle != NULL, I2C_CMD_LINK_INIT_ERR_STR, ESP_ERR_INVALID_ARG);
// Sometimes when the FSM get stuck, the ACK_ERR interrupt will occur endlessly until we reset the FSM and clear bus.
static uint8_t clear_bus_cnt = 0;
esp_err_t ret = ESP_FAIL;
i2c_obj_t* p_i2c = p_i2c_obj[i2c_num];
portTickType ticks_start = xTaskGetTickCount();
@ -1150,6 +1148,7 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
if (p_i2c->status == I2C_STATUS_TIMEOUT
|| I2C[i2c_num]->status_reg.bus_busy == 1) {
i2c_hw_fsm_reset(i2c_num);
clear_bus_cnt = 0;
}
i2c_reset_tx_fifo(i2c_num);
i2c_reset_rx_fifo(i2c_num);
@ -1164,7 +1163,10 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
p_i2c->rx_fifo_remain = I2C_FIFO_LEN;
i2c_reset_tx_fifo(i2c_num);
i2c_reset_rx_fifo(i2c_num);
// These two interrupts some times can not be cleared when the FSM gets stuck.
// so we disable them when these two interrupt occurs and re-enable them here.
I2C[i2c_num]->int_ena.ack_err = 1;
I2C[i2c_num]->int_ena.time_out = 1;
//start send commands, at most 32 bytes one time, isr handler will process the remaining commands.
i2c_master_cmd_begin_static(i2c_num);
@ -1190,8 +1192,14 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
// If the I2C slave are powered off or the SDA/SCL are connected to ground, for example,
// I2C hw FSM would get stuck in wrong state, we have to reset the I2C module in this case.
i2c_hw_fsm_reset(i2c_num);
clear_bus_cnt = 0;
ret = ESP_ERR_TIMEOUT;
} else if (p_i2c->status == I2C_STATUS_ACK_ERROR) {
clear_bus_cnt++;
if(clear_bus_cnt >= I2C_ACKERR_CNT_MAX) {
i2c_master_clear_bus(i2c_num);
clear_bus_cnt = 0;
}
ret = ESP_FAIL;
} else {
ret = ESP_OK;
@ -1205,6 +1213,7 @@ esp_err_t i2c_master_cmd_begin(i2c_port_t i2c_num, i2c_cmd_handle_t cmd_handle,
// If the I2C slave are powered off or the SDA/SCL are connected to ground, for example,
// I2C hw FSM would get stuck in wrong state, we have to reset the I2C module in this case.
i2c_hw_fsm_reset(i2c_num);
clear_bus_cnt = 0;
break;
}
}