David Giles / Mbed 2 deprecated CM-MBED_RSEDP_Test_Suite_LPC1768_V3

This is a complete listing of the RS-EDP software for the mbed module to support the RS-EDP platform.

Dependencies:   mbed

SourceFiles/RSEDP_BB_PCA9675_Serial_Input_Latch.cpp@0:5b7639d1f2c4, 2010-11-19 (annotated)

Committer:
DavidGilesHitex
Date:
Fri Nov 19 09:49:16 2010 +0000
Revision:
0:5b7639d1f2c4

        

        
Who changed what in which revision?

        

            
                
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/* Software Driver for Serial Input Latch PCA9675 on the RS-EDP Base Board */





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/* *********************************************************************** */





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/* Version 1.00 */





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/* Include Files */





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/* Include Files Here */





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#include "mbed.h"                                /* mbed header file */





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#include "misra_types.h"                         /* MISRA Types header file */





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#include "defines.h"





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#include "RSEDP_Slave_Address_Defines.h"        /* Slave address of I2C Peripherals */





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#include "mbed_Port_Structure.h"                /* Port structure for MBED Module */





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#include "RSEDP_CNTRL_I2C.h"                    /* Control I2C Driver */





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/* Function Prototypes Defines Here */





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sint32_t RSEDP_BB_setup_PCA9675(uint8_t Slave_Address);                                                          /* Setup and configure the I/O latch */





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sint32_t RSEDP_BB_PCA9675_reset(uint8_t Slave_Address);                                                          /* Reset the device using a general call */





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sint32_t RSEDP_BB_PCA9675_write_data(uint8_t Slave_Address, uint8_t port0_payload,uint8_t port1_payload);        /* Write two bytes of data to the device */





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sint32_t RSEDP_BB_PCA9675_read_data(uint8_t Slave_Address, uint8_t *read_port0, uint8_t *read_port1);            /* Read two bytes from the device */





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sint32_t RS_EDP_BB_Read_DIP_Switch(uint8_t Switch_Number);                                                       /* Read the switch position - either on or off */





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/* Configure the Serial I/O Expander IC */





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sint32_t RSEDP_BB_setup_PCA9675(uint8_t Slave_Address)





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    {





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       sint32_t Ack_Status = 0;





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        /* Assume the I2C peripheral and MCU I/O is already configured */





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        Ack_Status = RSEDP_BB_PCA9675_reset(Slave_Address);                                              /* Reset the device */





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        if (Ack_Status == ACK)





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            {





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                Ack_Status = RSEDP_BB_PCA9675_write_data(Slave_Address, 0xff,0xff);                                /* This configures all I/O as input */





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            }





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        return Ack_Status;





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    }    





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/* Reset the device */                





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sint32_t RSEDP_BB_PCA9675_reset(uint8_t Slave_Address)





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    {





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        sint32_t Ack_Status = 0;





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        sint8_t reset_command = 0x06;                                                   /* Reset command following a general call, address 0 will reset the device */





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        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(0x0, &reset_command, 2);            /* Send a general call command, (Slave address 0), plus one byte of value 0x06 */





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                                                                                        /* The PCA9675 does not generate an ACK on a general call */





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        return Ack_Status;                                                                                        





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    }                                    





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/* Write two byte of data to the device */





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sint32_t RSEDP_BB_PCA9675_write_data(uint8_t Slave_Address, uint8_t port0_payload, uint8_t port1_payload)





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    {





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        sint32_t Ack_Status = 0;





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        sint8_t tx_array[2];                                                        /* Local array of data to be transmitted */





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        tx_array[0] = port0_payload;                                                /* First is for Port 0 */





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        tx_array[1] = port1_payload;                                                /* Second is for Port 1 */





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        Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, tx_array, 2);    /* Send two bytes plus the slave address to the slave */





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        return Ack_Status;





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    }





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/* Read two bytes from the device */





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sint32_t RSEDP_BB_PCA9675_read_data(uint8_t Slave_Address, uint8_t *read_port0, uint8_t *read_port1)





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    {





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        sint32_t Ack_Status = 0;





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        sint8_t rx_array[2];                                                      /* Local reception array */





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        Ack_Status = CNTRL_I2C_Master_Mode_Receive(Slave_Address, rx_array, 2);   /* Receive two bytes */





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        *read_port0=rx_array[0];                                                  /* transfer data back to pointer */





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        *read_port1=rx_array[1];                                                  /* transfer data back to pointer */





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        return Ack_Status;





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    }        





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/* Read the switch position - either on or off */





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sint32_t RS_EDP_BB_Read_DIP_Switch(uint8_t Switch_Number, uint8_t *Switch_Status)





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    {





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        sint32_t Ack_Status = 0;





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        uint8_t port0 = 0;                                                        





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        uint8_t port1 = 0;





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        Ack_Status = RSEDP_BB_PCA9675_read_data(PCA9675_BASE_BOARD, &port0, &port1);





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        switch (Switch_Number)





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            {





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            case 1:





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                if ((port0 & 0x01) == SWITCH_ON) 





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            case 2:





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                if ((port0 & 0x02) == SWITCH_ON)





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            case 3:





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                if ((port0 & 0x04) == SWITCH_ON)





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            case 4:





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                if ((port0 & 0x08) == SWITCH_ON)





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            case 5:





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                if ((port0 & 0x10) == SWITCH_ON)





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            case 6:





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                if ((port0 & 0x20) == SWITCH_ON)





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            case 7:





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                if ((port0 & 0x40) == SWITCH_ON) 





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            case 8:





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                if ((port0 & 0x80) == SWITCH_ON) 





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                    {





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                        *Switch_Status = DIP_SWITCH_CLOSED;





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                    }





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                else{





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                        *Switch_Status = DIP_SWITCH_OPEN;





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                    }





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                break;





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            default:





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                    {





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                        *Switch_Status = port0;





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                    }





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            }        





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        return Ack_Status;





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     }





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