David Giles
This is a complete listing of the RS-EDP software for the mbed module to support the RS-EDP platform.
SourceFiles/RSEDP_DIO_PCA9555_Serial_Digital_IO.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?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| DavidGilesHitex | 0:5b7639d1f2c4 | 1 | /* This module is to drive the Serial Digital I/O PCA9555 Device */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 2 | /* ************************************************************* */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 3 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 4 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 5 | /* Version 1.00 */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 6 | /* Start Date: 23/6/09 */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 7 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 8 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 9 | /* The digital Output from the serial latch drive the ULN2003 line driver devices */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 10 | /* The digital input devices come through a protection circuit on the board and are then fed into the serial input latch */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 11 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 12 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 13 | /* Include Files Here */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 14 | #include "mbed.h" /* mbed header file */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 15 | #include "misra_types.h" /* MISRA Types header file */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 16 | #include "defines.h" |
| DavidGilesHitex | 0:5b7639d1f2c4 | 17 | #include "RSEDP_Slave_Address_Defines.h" /* Slave Address of CNTRL I2C devices */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 18 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 19 | #include "mbed_Port_Structure.h" /* Port structure for MBED Module */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 20 | #include "RSEDP_CNTRL_I2C.h" /* Control I2C Driver */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 21 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 22 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 23 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 24 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 25 | /* Function Prototypes Here */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 26 | sint32_t RSEDP_DIO_setup_PCA9555(uint8_t Slave_Address, uint8_t Port0_IO_Direction,uint8_t Port1_IO_Direction); /* Setup the device I/O Direction */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 27 | sint32_t RSEDP_DIO_PCA9555_Write_Word(uint8_t Slave_Address, uint8_t Port0_Payload, uint8_t Port1_Payload); /* Write to the I/O pins */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 28 | sint32_t RSEDP_DIO_PCA9555_Read_Data(uint8_t Slave_Address, uint8_t *Port0_Data, uint8_t*Port1_Data); /* Read data on the input pins */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 29 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 30 | static sint32_t PCA9555_Write_Data(uint8_t Slave_Address, uint8_t command_byte, uint8_t P0_payload, uint8_t P1_payload);/* Local function used to xfer data to the I2C Module */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 31 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 32 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 33 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 34 | /* Setup the device I/O Direction of the Latch*/ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 35 | sint32_t RSEDP_DIO_setup_PCA9555(uint8_t Slave_Address, uint8_t Port0_IO_Direction,uint8_t Port1_IO_Direction) |
| DavidGilesHitex | 0:5b7639d1f2c4 | 36 | { |
| DavidGilesHitex | 0:5b7639d1f2c4 | 37 | sint32_t Ack_Status = 0; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 38 | /* Assume the I2C peripheral and I/O is already configured */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 39 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 40 | Ack_Status = PCA9555_Write_Data(Slave_Address, 0x06, Port0_IO_Direction, Port1_IO_Direction); /* This 0x06 = configures the I/O direction */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 41 | return Ack_Status; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 42 | } |
| DavidGilesHitex | 0:5b7639d1f2c4 | 43 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 44 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 45 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 46 | /* Write Data Out to the Port Latches */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 47 | sint32_t RSEDP_DIO_PCA9555_Write_Word(uint8_t Slave_Address, uint8_t Port0_Payload, uint8_t Port1_Payload) |
| DavidGilesHitex | 0:5b7639d1f2c4 | 48 | { |
| DavidGilesHitex | 0:5b7639d1f2c4 | 49 | sint32_t Ack_Status = 0; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 50 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 51 | Ack_Status = PCA9555_Write_Data(Slave_Address, 0x02, Port0_Payload, Port1_Payload); /* This Writes the data to the I/O latches */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 52 | return Ack_Status; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 53 | } |
| DavidGilesHitex | 0:5b7639d1f2c4 | 54 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 55 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 56 | /* Read the values on the serial latch pins */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 57 | sint32_t RSEDP_DIO_PCA9555_Read_Data(uint8_t Slave_Address, uint8_t *Port0_Data, uint8_t*Port1_Data) |
| DavidGilesHitex | 0:5b7639d1f2c4 | 58 | { |
| DavidGilesHitex | 0:5b7639d1f2c4 | 59 | sint32_t Ack_Status = 0; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 60 | sint8_t rx_array[2] = {0x00, 0x00}; /* Local reception array */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 61 | sint8_t tx_array[1] = {0x000}; /* Data to transmit */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 62 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 63 | tx_array[0] = 0; /* Command Byte For Read */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 64 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 65 | Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, tx_array, 1); |
| DavidGilesHitex | 0:5b7639d1f2c4 | 66 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 67 | if (Ack_Status == ACK) |
| DavidGilesHitex | 0:5b7639d1f2c4 | 68 | { |
| DavidGilesHitex | 0:5b7639d1f2c4 | 69 | Ack_Status = CNTRL_I2C_Master_Mode_Receive(Slave_Address, rx_array, 2); /* Receive two bytes from the serial latch */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 70 | *Port0_Data = rx_array[0]; /* Transfer Port 0 Data to pointer */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 71 | *Port1_Data = rx_array[1]; /* Transfer Port 1 Data to pointer */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 72 | } |
| DavidGilesHitex | 0:5b7639d1f2c4 | 73 | return Ack_Status; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 74 | } |
| DavidGilesHitex | 0:5b7639d1f2c4 | 75 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 76 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 77 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 78 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 79 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 80 | /* Write address, command byte plus two additional bytes of data to the device */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 81 | static sint32_t PCA9555_Write_Data(uint8_t Slave_Address, uint8_t command_byte, uint8_t P0_payload, uint8_t P1_payload) |
| DavidGilesHitex | 0:5b7639d1f2c4 | 82 | { |
| DavidGilesHitex | 0:5b7639d1f2c4 | 83 | sint32_t Ack_Status = 0; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 84 | sint8_t tx_array[3]; /* Local array of data to be transmitted */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 85 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 86 | tx_array[0] = command_byte; /* Load transmit array */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 87 | tx_array[1] = P0_payload; /* First is for Port 0 */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 88 | tx_array[2] = P1_payload; /* Second is for Port 1 */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 89 | |
| DavidGilesHitex | 0:5b7639d1f2c4 | 90 | Ack_Status = CNTRL_I2C_Master_Mode_Transmit(Slave_Address, tx_array, 3); /* Send 3 bytes */ |
| DavidGilesHitex | 0:5b7639d1f2c4 | 91 | return Ack_Status; |
| DavidGilesHitex | 0:5b7639d1f2c4 | 92 | } |
| DavidGilesHitex | 0:5b7639d1f2c4 | 93 |