mini board PCU9669 (and PCA9665) sample code
Dependencies: mbed PCU9669 utility PCA9665 I2C_slaves parallel_bus
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Sample code for PCU9669 (PCU9661, PCA9663, PCA9661 and PCA9665) evaluation board.
PCU9669 evaluation board: Mini board PCU9669
User manual is available -> http://www.nxp.com/documents/user_manual/UM10580.pdf
Diff: mini_board_libs/PCU9669/PCU9669_access.c
- Revision:
- 5:57c345099873
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mini_board_libs/PCU9669/PCU9669_access.c Mon Mar 26 06:17:23 2012 +0000 @@ -0,0 +1,130 @@ +/** A sample code for "mini board PCU9669/PCA9665" + * + * @author Tedd OKANO, NXP Semiconductors + * @version 0.9 + * @date 14-Feb-2011 + * + * Released under the MIT License: http://mbed.org/license/mit + * + * An operation sample of PCU9669/PCA9665 I2C bus controller. + * The mbed accesses the bus controller's parallel port (8/2 bit address and 8 bit data) by bit-banging. + * The bit-banging is poerformed by PortInOut function of mbed library. + * + * To make the code porting easier, all codes are partitioned into layers to abstract other parts. + * The mbed specific parts are concentrated in lowest layer: "hardware_abs.*". + * This module may need to be modified for the porting. + * + * All other upper layers are writen in standard-C. + * + * base code is written from 05-Sep-2011 to 09-Sep-2011. + * And demo code has been build on 11-Sep-2011. + * Debug and code adjustment has been done on 08-Sep-2011. + * Small sanitization for main.cpp. All mbed related codes are moved in to "hardware_abs.*". 13-Oct-2011 + * hardware_abs are moved into parallel_bus library folder, 3 LED driver operation sample 13-Feb.-2012 + * PCU9669 and PCA9665 codes are packed in a project 14-Feb-2012. + * + * Before builidng the code, please edit the file mini_board_PCU9669/config.h + * Uncomment the target name what you want to target. + */ + +/* + * "PCU9669_access" module abstracts PCU9669 register and data buffer access. + * This gives simple interface to the bus controller. + * All this interface works on "hardware_abs" module. + */ + +#include "PCU9669_access.h" // PCU9669 chip access interface +#include "hardware_abs.h" // Using hardware abstraction interface + +// +// prototypes (module private function prototypes) +// + +int is_bus_controller_ready( void ); +int check_device_ID( char target_id ); +void registers_initialize( void ); + +// variables + +char device_id_code; // keeps CHIP_ID value +char ch_ofst[] = { OFFSET_CH0, OFFSET_CH1, OFFSET_CH2 }; // Address offsets of channel registers + +// Channel register writing function + +void write_ch_register( char ch, char reg, char val ) { + write_data( ch_ofst[ ch ] + reg, val ); +} + +// Channel register reading function + +char read_ch_register( char ch, char reg ) { + return( read_data( ch_ofst[ ch ] + reg ) ); +} + +// Start routine: It checks the bus controller can be accessed, chip-ID value and initializes registers. + +int start_bus_controller( char target_id ) { + if ( is_bus_controller_ready() ) + return 1; + + if ( check_device_ID( target_id ) ) + return 2; + + registers_initialize(); + + return 0; +} + +// (module private finction, called by start_bus_controller) +// checks if the bus controller can be accessed + +int is_bus_controller_ready( void ) { + return ( read_data( CTRLRDY ) ); +} + +// (module private finction, called by start_bus_controller) +// checks if chip-ID value is same as expected. The "TARGET_BUS_CONTROLLER" value can be modified in "PCU9669_access.h" + +int check_device_ID( char target_id ) { + device_id_code = read_data( DEVICE_ID ); +// printf( "Target chip: PC%c96%02X, ID register value = 0x%02X\r\n", device_id_code & 0x80 ? 'U' : 'A', device_id_code & 0x7F, device_id_code ); + + return ( target_id == device_id_code ) ? 0 : -1; +} + +// (module private finction, called by start_bus_controller) +// register initializations. + +void registers_initialize( void ) { + + // The PCU9669 does not require any specical register initializations. + // It can start data transfer with default register settings. + // + // Or, if you need to have specific settings modify this function like following sample. + +#if 0 + write_ch_register( CH_UFM1, SCLPER, 32 ); + write_ch_register( CH_UFM1, SDADLY, 2 ); + write_ch_register( CH_UFM2, SCLPER, 32 ); + write_ch_register( CH_UFM2, SDADLY, 2 ); +#endif +} + +// Next functions are option. +// if the BURST_DATA_ACCESS is defined in "hardware_abs.h", it is propagated to define "PCU9969_BURST_DATA_ACCESS" +// These interface may be useful for table and buffer access + +#ifdef PCU9969_BURST_DATA_ACCESS + +void write_ch_register_burst( char ch, char reg, char *vp, char length ) { + write_data_burst( ch_ofst[ ch ] + reg, vp, length ); +} + +void read_ch_register_burst( char ch, char reg, char *vp, char length ) { + read_data_burst( ch_ofst[ ch ] + reg, vp, length ); +} + +#endif + + +