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Rev 237 Rev 276
Line 27... Line 27...
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 27 
 
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    // Enable the I2C module and set the clock stretch enable bit
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    // Enable the I2C module and set the clock stretch enable bit
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    // Note: Automatically overrides any other pin settings
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    // Note: Automatically overrides any other pin settings
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    I2C1CONSET = 0x00008040;
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    I2C1CONSET = 0x00008040;
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    I2C1ADD = address;
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    I2C1ADD = address;
- 
 
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    if (speed == 0x01) {
- 
 
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        I2C1BRG = 0x0BE;    // Operate at 200kHZ (80MHz)
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        I2C1CONbits.DISSLW = 0; // Slew rate control enabled
- 
 
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    } else if (speed == 0x02) {
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    if (!speed) I2C1BRG = 0x05A;    // Operate at 400kHZ (80MHz)
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        I2C1BRG = 0x05A;    // Operate at 400kHZ (80MHz)
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        I2C1CONbits.DISSLW = 1; // Slew rate control disabled
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    } else if (speed == 0x03) {
- 
 
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        I2C1BRG = 0x020; // Operate at 1MHz (80MHz)
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        I2C1CONbits.DISSLW = 1; // Slew rate control disabled
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    } else {
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    else        I2C1BRG = 0x186;    // Operate at 100kHZ (80MHz)
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        I2C1BRG = 0x186;    // Operate at 100kHZ (80MHz)
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        I2C1CONbits.DISSLW = 0; // Slew rate control enabled
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    }
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    IFS0CLR = 0xE0000000;   // Clear any existing events
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    IFS0CLR = 0xE0000000;   // Clear any existing events
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    IPC6CLR = 0x00001F00;   // Reset priority levels
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    IPC6CLR = 0x00001F00;   // Reset priority levels
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    IPC6SET = 0x00001500;   // Set IPL=5, Subpriority 1
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    IPC6SET = 0x00001600;   // Set IPL=6, Subpriority 2
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    IEC0SET = 0xE0000000;   // Enable I2C1 interrupts
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    IEC0SET = 0xE0000000;   // Enable I2C1 interrupts
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    INTEnableInterrupts();
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    INTEnableInterrupts();
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}
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}
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                break;
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                break;
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            case I2C1_CHECK_ACK_SEND:
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            case I2C1_CHECK_ACK_SEND:
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                // Check if ACK is received or not
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                // Check if ACK is received or not
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                if (!I2C1STATbits.ACKSTAT) {
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                if (!I2C1STATbits.ACKSTAT) {
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                    // If an ACK is received, send first byte of data
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                    // If an ACK is received, send first byte of data
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                    I2C1TRN = i2c_data_p->buffer_in[0];
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                    uint8_t to_send = i2c_data_p->buffer_in[0];
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                    I2C1TRN = to_send;
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                    i2c_data_p->operating_state = I2C1_CHECK_ACK_RESTART;
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                    i2c_data_p->operating_state = I2C1_CHECK_ACK_RESTART;
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                } else {
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                } else {
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                    // If a NACK is received, stop transmission and send error
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                    // If a NACK is received, stop transmission and send error
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                    i2c_data_p->operating_state = I2C1_STOPPED;
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                    i2c_data_p->operating_state = I2C1_STOPPED;
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                    I2C1CONbits.PEN = 1;
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                    I2C1CONbits.PEN = 1;