mirror of
https://github.com/FunKey-Project/FunKey-GPIO-Mapping.git
synced 2025-12-12 09:48:51 +01:00
121 lines
3.9 KiB
C
Executable File
121 lines
3.9 KiB
C
Executable File
#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/select.h>
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#include <linux/input.h>
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#include "read_conf_file.h"
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#include <assert.h>
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#include <linux/i2c.h>
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#include <linux/i2c-dev.h>
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#include "smbus.h"
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#include "driver_axp209.h"
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/****************************************************************
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* Defines
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****************************************************************/
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#define DEBUG_AXP209_PRINTF (0)
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#if (DEBUG_AXP209_PRINTF)
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#define DEBUG_PRINTF(...) printf(__VA_ARGS__);
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#else
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#define DEBUG_PRINTF(...)
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#endif
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/****************************************************************
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* Static variables
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****************************************************************/
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static int fd_axp209;
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static char i2c0_sysfs_filename[] = "/dev/i2c-0";
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/****************************************************************
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* Static functions
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****************************************************************/
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/****************************************************************
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* Public functions
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****************************************************************/
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bool axp209_init(void) {
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int err;
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/* Open i2c file interface */
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if ((fd_axp209 = open(i2c0_sysfs_filename,O_RDWR)) < 0) {
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printf("In axp209_init - Failed to open the I2C bus %s", i2c0_sysfs_filename);
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// ERROR HANDLING; you can check errno to see what went wrong
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return false;
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}
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/* Acquire AXP209 bus */
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if (ioctl(fd_axp209, I2C_SLAVE, AXP209_I2C_ADDR) < 0) {
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printf("In axp209_init - Failed to acquire bus access and/or talk to slave, trying to force it\n");
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// ERROR HANDLING; you can check errno to see what went wrong
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if (ioctl(fd_axp209, I2C_SLAVE_FORCE, AXP209_I2C_ADDR) < 0) {
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printf("In axp209_init - Failed to acquire FORCED bus access and/or talk to slave.\n");
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// ERROR HANDLING; you can check errno to see what went wrong
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return false;
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}
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}
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/* Set PEK Long press delay to 2.5s*/
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err = i2c_smbus_write_byte_data(fd_axp209 , AXP209_REG_PEK_PARAMS, 0x9F);
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if(err < 0){
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printf("ERROR Setting AXP209 PEK Long press delay to 2.5s\n");
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}
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/* Set N_OE Shutdown delay to 3s*/
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err = i2c_smbus_write_byte_data(fd_axp209 , AXP209_REG_32H, 0x47);
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if(err < 0){
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printf("ERROR Setting AXP209 N_OE Shutdown delay to 3S\n");
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}
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/* Enable only chosen interrupts (PEK short and long presses)*/
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/*err = i2c_smbus_write_byte_data(fd_axp209 , AXP209_INTERRUPT_BANK_1_ENABLE, 0x00);
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if(err < 0){
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printf("ERROR initializing interrupts 1 for AXP209\n");
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}
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err = i2c_smbus_write_byte_data(fd_axp209 , AXP209_INTERRUPT_BANK_2_ENABLE, 0x00);
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if(err < 0){
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printf("ERROR initializing interrupts 2 for AXP209\n");
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}*/
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err = i2c_smbus_write_byte_data(fd_axp209 , AXP209_INTERRUPT_BANK_3_ENABLE, 0x03);
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if(err < 0){
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printf("ERROR initializing interrupts 3 for AXP209\n");
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}
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/*err = i2c_smbus_write_byte_data(fd_axp209 , AXP209_INTERRUPT_BANK_4_ENABLE, 0x00);
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if(err < 0){
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printf("ERROR initializing interrupts 4 for AXP209\n");
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}
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err = i2c_smbus_write_byte_data(fd_axp209 , AXP209_INTERRUPT_BANK_5_ENABLE, 0x00);
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if(err < 0){
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printf("ERROR initializing interrupts 5 for AXP209\n");
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}*/
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return true;
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}
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bool axp209_deinit(void) {
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// Close I2C open interface
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close(fd_axp209);
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return true;
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}
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int axp209_read_interrupt_bank_3(void){
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int val = i2c_smbus_read_byte_data ( fd_axp209 , AXP209_INTERRUPT_BANK_3_STATUS );
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if(val < 0){
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return val;
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}
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// Clear interrupts
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int err = i2c_smbus_write_byte_data( fd_axp209 ,AXP209_INTERRUPT_BANK_3_STATUS, 0xFF );
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if(err < 0){
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return err;
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}
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DEBUG_PRINTF("READ AXP209_INTERRUPT_BANK_3_STATUS: 0x%02X\n",val);
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return 0xFF & val;
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}
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