I2C not working

[aleena]

Posted on December 05, 2015 at 10:29

Hi,

 I'm using STM8S003F3 controller to monitor a temperature sensor using I2C Interface. I'm able to monitor while in debug and Run mode (in STVD IDE) using SWIM, but once I program into flash (using STVP through SWIM) im not getting clock and data in I2C lines. Is there any setting that has to be taken care of while programming through STVP. Any help would be appreciated.Thanks.Attached is the I2C code. Is there any more configuration that has to be done ? void init(void){ i2c_deinit(); // Initialize I2C interface  i2c_init();}void i2c_deinit(void){ /* Disable I2C peripheral */ I2C_Cmd(DISABLE); /* Deinit I2C module */ I2C_DeInit(); /* Disable I2C module clock */ CLK_PeripheralClockConfig(CLK_PERIPHERAL_I2C, DISABLE); /* Pins configuration */ /* I2C SCL as GPIO */GPIO_Init(I2C_SCL_GPIO_PORT, I2C_SCL_GPIO_PIN,  GPIO_MODE_OUT_PP_LOW_FAST); /* I2C SDA as GPIO */ GPIO_Init(I2C_SDA_GPIO_PORT, I2C_SDA_GPIO_PIN,  GPIO_MODE_OUT_PP_LOW_FAST);}void i2c_init(void){ __IO uint8_t value; uint16_t i; /* Enable I2C module clock */ CLK_PeripheralClockConfig(CLK_PERIPHERAL_I2C, ENABLE); I2C_Init(I2C_OUT_FREQ, I2C_ADDR,               I2C_DUTYCYCLE_2, I2C_ACK_CURR,               I2C_ADDMODE_7BIT, I2C_INPUT_FREQ); /* Enable I2C peripheral */ I2C_Cmd(ENABLE);  }int8_t i2c_write(uint8_t command, uint8_t value){ uint16_t timeout = 0xFFFF/*0xA000*/; /* TODO: Verify the timeout period */ while (I2C_GetFlagStatus(I2C_FLAG_BUSBUSY) == SET) { timeout--; if (timeout == 0) return -1; } // Send START condition I2C_GenerateSTART(ENABLE); // EV 5 // Wait for START condition to be released correctly on the I2C bus (the bus is free, no other devices is communicating) while(I2C_CheckEvent(I2C_EVENT_MASTER_MODE_SELECT) == FALSE) { if (!(timeout--)) return -2; } // Send the Slave address for write operation I2C_Send7bitAddress(I2C_ADDR, I2C_DIRECTION_TX); // EV 6 while(I2C_CheckEvent(I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) == FALSE) { if (!(timeout--)) return -3; } // Send the command I2C_SendData(command); // EV 8 while(I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTING) == FALSE) { if (!(timeout--)) return -4; } // Send the data I2C_SendData(value); // EV 8_2 while(I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_TRANSMITTED) == FALSE) { if (!(timeout--)) return -5; } // Send STOP condition I2C_GenerateSTOP(ENABLE); return 0;}int8_t i2c_read(uint8_t command, uint8_t *value){ uint8_t timeout = 0xFFFF; while (I2C_GetFlagStatus(I2C_FLAG_BUSBUSY) == SET) { if (!(timeout--)) return -1; } // Send START condition I2C_GenerateSTART(ENABLE); // EV 5 // Wait for START condition to be released correctly on the I2C bus (the bus is free, no other devices is communicating) while(I2C_CheckEvent(I2C_EVENT_MASTER_MODE_SELECT) == FALSE) { if (!(timeout--)) return -2; } // Send the Slave address for write operation I2C_Send7bitAddress(I2C_ADDR, I2C_DIRECTION_TX); // EV 6 while(I2C_CheckEvent(I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) == FALSE) { if (!(timeout--)) return -3; } // Send the command I2C_SendData(command); while(I2C_GetFlagStatus(I2C_FLAG_TRANSFERFINISHED) == RESET) { if (!(timeout--)) return -4; } /* TODO: Enable if Stop is required // Send STOP condition I2C_GenerateSTOP(ENABLE); */ // Send START condition for second time I2C_GenerateSTART(ENABLE); // EV 5 // Wait for START condition to be released correctly on the I2C bus (the bus is free, no other devices is communicating) while(I2C_CheckEvent(I2C_EVENT_MASTER_MODE_SELECT) == FALSE) { if (!(timeout--)) return -5; } // Send the Slave address for read operation I2C_Send7bitAddress(I2C_ADDR, I2C_DIRECTION_RX); // EV 6 while(I2C_CheckEvent(I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) == FALSE) { if (!(timeout--)) return -6; } // EV7 while(I2C_CheckEvent(I2C_EVENT_MASTER_BYTE_RECEIVED) == FALSE) { if (!(timeout--)) return -7; } // Read a byte from Slave *value = I2C_ReceiveData(); // Disable Acknowledgement I2C_AcknowledgeConfig(I2C_ACK_NONE); // Send STOP condition I2C_GenerateSTOP(ENABLE); return 0;}