diff options
Diffstat (limited to 'firmware/drivers/mpr121.c')
| -rw-r--r-- | firmware/drivers/mpr121.c | 350 |
1 files changed, 0 insertions, 350 deletions
diff --git a/firmware/drivers/mpr121.c b/firmware/drivers/mpr121.c deleted file mode 100644 index 7b41208a3a..0000000000 --- a/firmware/drivers/mpr121.c +++ /dev/null @@ -1,350 +0,0 @@ -/*************************************************************************** - * __________ __ ___. - * Open \______ \ ____ ____ | | _\_ |__ _______ ___ - * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / - * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < - * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ - * \/ \/ \/ \/ \/ - * $Id$ - * - * Copyright (C) 2012 Amaury Pouly - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ****************************************************************************/ - -/** Driver for the Freescale MPR121 Capacitive Proximity Sensor */ -#include "system.h" -#include "mpr121.h" -#include "i2c.h" - -/* Touch status: EL{0,7} */ -#define REG_TOUCH_STATUS 0x00 -#define REG_TOUCH_STATUS__ELE(x) (1 << (x)) -/* Touch status: EL{8-11,prox}, overcurrent */ -#define REG_TOUCH_STATUS2 0x01 -#define REG_TOUCH_STATUS2__ELE(x) (1 << ((x) - 8)) -#define REG_TOUCH_STATUS2__ELEPROX (1 << 4) -#define REG_TOUCH_STATUS2__OVCF (1 << 7) -/* Out of range: EL{0,7} */ -#define REG_OOR_STATUS 0x02 -#define REG_OOR_STATUS__ELE(x) (1 << (x)) -/* Out of range: EL{8-11,prox}, autoconf err */ -#define REG_OOR_STATUS2 0x03 -#define REG_OOR_STATUS2__ELE(x) (1 << (x)) -#define REG_OOR_STATUS2__ELEPROX (1 << 4) -#define REG_OOR_STATUS2__ACFF (1 << 6) -#define REG_OOR_STATUS2__ARFF (1 << 7) -/* Electrode X filtered data LSB */ -#define REG_EFDxLB(x) (0x04 + 0x02 * (x)) -/* Electrode X filtered data MSB */ -#define REG_EFDxHB(x) (0x05 + 0x02 * (x)) -/* Proximity electrode X filtered data LSB */ -#define REG_EFDPROXLB 0x1c -/* Proximity electrode X filtered data MSB */ -#define REG_EFDPROXHB 0x1d -/* Electrode baseline value */ -#define REG_ExBV(x) (0x1e + (x)) -/* Proximity electrode baseline value */ -#define REG_EPROXBV 0x2a -/* Max Half Delta Rising */ -#define REG_MHDR 0x2b -/* Noise Half Delta Rising */ -#define REG_NHDR 0x2c -/* Noise Count Limit Rising */ -#define REG_NCLR 0x2d -/* Filter Delay Limit Rising */ -#define REG_FDLR 0x2e -/* Max Half Delta Falling */ -#define REG_MHDF 0x2f -/* Noise Half Delta Falling */ -#define REG_NHDF 0x30 -/* Noise Count Limit Falling */ -#define REG_NCLF 0x31 -/* Filter Delay Limit Falling */ -#define REG_FDLF 0x32 -/* Noise Half Delta Touched */ -#define REG_NHDT 0x33 -/* Noise Count Limit Touched */ -#define REG_NCLT 0x34 -/* Filter Delay Limit Touched */ -#define REG_FDLT 0x35 -/* Proximity Max Half Delta Rising */ -#define REG_MHDPROXR 0x36 -/* Proximity Noise Half Delta Rising */ -#define REG_NHDPROXR 0x37 -/* Proximity Noise Count Limit Rising */ -#define REG_NCLPROXR 0x38 -/* Proximity Filter Delay Limit Rising */ -#define REG_FDLPROXR 0x39 -/* Proximity Max Half Delta Falling */ -#define REG_MHDPROXF 0x3a -/* Proximity Noise Half Delta Falling */ -#define REG_NHDPROXF 0x3b -/* Proximity Noise Count Limit Falling */ -#define REG_NCLPROXF 0x3c -/* Proximity Filter Delay Limit Falling */ -#define REG_FDLPROXF 0x3d -/* Proximity Noise Half Delta Touched */ -#define REG_NHDPROXT 0x3e -/* Proximity Noise Count Limit Touched */ -#define REG_NCLPROXT 0x3f -/* Proximity Filter Delay Limit Touched */ -#define REG_FDLPROXT 0x40 -/* Eletrode Touch Threshold */ -#define REG_ExTTH(x) (0x41 + 2 * (x)) -/* Eletrode Release Threshold */ -#define REG_ExRTH(x) (0x42 + 2 * (x)) -/* Proximity Eletrode Touch Threshold */ -#define REG_EPROXTTH 0x59 -/* Proximity Eletrode Release Threshold */ -#define REG_EPROXRTH 0x5a -/* Debounce Control */ -#define REG_DEBOUNCE 0x5b -#define REG_DEBOUNCE__DR(dr) ((dr) << 4) -#define REG_DEBOUNCE__DT(dt) (dt) -/* Analog Front End Configuration */ -#define REG_AFE 0x5c -#define REG_AFE__CDC(cdc) (cdc) -#define REG_AFE__FFI(ffi) ((ffi) << 6) -/* Filter Configuration */ -#define REG_FILTER 0x5d -#define REG_FILTER__ESI(esi) (esi) -#define REG_FILTER__SFI(sfi) ((sfi) << 3) -#define REG_FILTER__CDT(cdt) ((cdt) << 5) -/* Electrode Configuration */ -#define REG_ELECTRODE 0x5e -#define REG_ELECTRODE__ELE_EN(en) (en) -#define REG_ELECTRODE__ELEPROX_EN(en) ((en) << 4) -#define REG_ELECTRODE__CL(cl) ((cl) << 6) -/* Electrode X Current */ -#define REG_CDCx(x) (0x5f + (x)) -/* Proximity Eletrode X Current */ -#define REG_CDCPROX 0x6b -/* Electrode X Charge Time */ -#define REG_CDTx(x) (0x6c + (x) / 2) -#define REG_CDTx__CDT0(x) (x) -#define REG_CDTx__CDT1(x) ((x) << 4) -/* Proximity Eletrode X Charge Time */ -#define REG_CDTPROX 0x72 -/* GPIO Control Register: CTL0{4-11} */ -#define REG_GPIO_CTL0 0x73 -#define REG_GPIO_CTL0__CTL0x(x) (1 << ((x) - 4)) -/* GPIO Control Register: CTL1{4-11} */ -#define REG_GPIO_CTL1 0x74 -#define REG_GPIO_CTL1__CTL1x(x) (1 << ((x) - 4)) -/* GPIO Data Register */ -#define REG_GPIO_DATA 0x75 -#define REG_GPIO_DATA__DATx(x) (1 << ((x) - 4)) -/* GPIO Direction Register */ -#define REG_GPIO_DIR 0x76 -#define REG_GPIO_DIR__DIRx(x) (1 << ((x) - 4)) -/* GPIO Enable Register */ -#define REG_GPIO_EN 0x77 -#define REG_GPIO_EN__ENx(x) (1 << ((x) - 4)) -/* GPIO Data Set Register */ -#define REG_GPIO_SET 0x78 -#define REG_GPIO_SET__SETx(x) (1 << ((x) - 4)) -/* GPIO Data Clear Register */ -#define REG_GPIO_CLR 0x79 -#define REG_GPIO_CLR__CLRx(x) (1 << ((x) - 4)) -/* GPIO Data Toggle Register */ -#define REG_GPIO_TOG 0x7a -#define REG_GPIO_TOG__TOGx(x) (1 << ((x) - 4)) -/* Auto-Configuration Control 0 */ -#define REG_AUTO_CONF 0x7b -#define REG_AUTO_CONF__ACE(ace) (ace) -#define REG_AUTO_CONF__ARE(are) ((are) << 1) -#define REG_AUTO_CONF__BVA(bva) ((bva) << 2) -#define REG_AUTO_CONF__RETRY(retry) ((retry) << 4) -#define REG_AUTO_CONF__FFI(ffi) ((ffi) << 6) -/* Auto-Configuration Control 1 */ -#define REG_AUTO_CONF2 0x7c -#define REG_AUTO_CONF2__ACFIE(acfie) (acfie) -#define REG_AUTO_CONF2__ARFIE(arfie) ((arfie) << 1) -#define REG_AUTO_CONF2__OORIE(oorie) ((oorie) << 2) -#define REG_AUTO_CONF2__SCTS(scts) ((scts) << 7) -/* Auto-Configuration Upper-Limit */ -#define REG_USL 0x7d -/* Auto-Configuration Lower-Limit */ -#define REG_LSL 0x7e -/* Auto-Configuration Target Level */ -#define REG_TL 0x7f -/* Soft-Reset */ -#define REG_SOFTRESET 0x80 -#define REG_SOFTRESET__MAGIC 0x63 -/* PWM Control */ -#define REG_PWMx(x) (0x81 + ((x) - 4) / 2) -#define REG_PWMx_IS_PWM0(x) (((x) % 2) == 0) -#define REG_PWMx__PWM0(x) (x) -#define REG_PWMx__PWM0_BM 0xf -#define REG_PWMx__PWM1(x) ((x) << 4) -#define REG_PWMx__PWM1_BM 0xf0 - -static int i2c_addr; - -static inline int mpr121_write_reg(uint8_t reg, uint8_t data) -{ - return i2c_writemem(i2c_addr, reg, &data, 1); -} - -static inline int mpr121_read_reg(uint8_t reg, uint8_t *data) -{ - return i2c_readmem(i2c_addr, reg, data, 1); -} - -int mpr121_init(int dev_i2c_addr) -{ - i2c_addr = dev_i2c_addr; - return 0; -} - -int mpr121_soft_reset(void) -{ - return mpr121_write_reg(REG_SOFTRESET, REG_SOFTRESET__MAGIC); -} -int mpr121_set_config(struct mpr121_config_t *conf) -{ - int ret; -#define safe_write(reg, val) \ - do { ret = mpr121_write_reg(reg, val); \ - if(ret) return ret; } while(0) - /* stop mode */ - safe_write(REG_ELECTRODE, 0); - /* write baseline values */ - for(int i = 0; i < ELECTRODE_COUNT; i++) - safe_write(REG_ExBV(i), conf->ele[i].bv); - /* write eleprox bv */ - safe_write(REG_EPROXBV, conf->eleprox.bv); - /* write global fields */ - safe_write(REG_MHDR, conf->filters.ele.rising.mhd); - safe_write(REG_NHDR, conf->filters.ele.rising.nhd); - safe_write(REG_NCLR, conf->filters.ele.rising.ncl); - safe_write(REG_FDLR, conf->filters.ele.rising.fdl); - safe_write(REG_MHDF, conf->filters.ele.falling.mhd); - safe_write(REG_NHDF, conf->filters.ele.falling.nhd); - safe_write(REG_NCLF, conf->filters.ele.falling.ncl); - safe_write(REG_FDLF, conf->filters.ele.falling.fdl); - safe_write(REG_NHDT, conf->filters.ele.touched.nhd); - safe_write(REG_NCLT, conf->filters.ele.touched.ncl); - safe_write(REG_FDLT, conf->filters.ele.touched.fdl); - safe_write(REG_MHDPROXR, conf->filters.eleprox.rising.mhd); - safe_write(REG_NHDPROXR, conf->filters.eleprox.rising.nhd); - safe_write(REG_NCLPROXR, conf->filters.eleprox.rising.ncl); - safe_write(REG_FDLPROXR, conf->filters.eleprox.rising.fdl); - safe_write(REG_MHDPROXF, conf->filters.eleprox.falling.mhd); - safe_write(REG_NHDPROXF, conf->filters.eleprox.falling.nhd); - safe_write(REG_NCLPROXF, conf->filters.eleprox.falling.ncl); - safe_write(REG_FDLPROXF, conf->filters.eleprox.falling.fdl); - safe_write(REG_NHDPROXT, conf->filters.eleprox.touched.nhd); - safe_write(REG_NCLPROXT, conf->filters.eleprox.touched.ncl); - safe_write(REG_FDLPROXT, conf->filters.eleprox.touched.fdl); - /* touch & release thresholds */ - for(int i = 0; i < ELECTRODE_COUNT; i++) - { - safe_write(REG_ExTTH(i), conf->ele[i].tth); - safe_write(REG_ExRTH(i), conf->ele[i].rth); - } - safe_write(REG_EPROXTTH, conf->eleprox.tth); - safe_write(REG_EPROXRTH, conf->eleprox.rth); - /* debounce */ - safe_write(REG_DEBOUNCE, REG_DEBOUNCE__DR(conf->debounce.dr) | - REG_DEBOUNCE__DT(conf->debounce.dt)); - /* analog-front end and filters */ - safe_write(REG_AFE, REG_AFE__CDC(conf->global.cdc) | - REG_AFE__FFI(conf->global.ffi)); - safe_write(REG_FILTER, REG_FILTER__CDT(conf->global.cdt) | - REG_FILTER__ESI(conf->global.esi) | REG_FILTER__SFI(conf->global.sfi)); - /* electrode charge */ - for(int i = 0; i < ELECTRODE_COUNT; i++) - safe_write(REG_CDCx(i), conf->ele[i].cdc); - safe_write(REG_CDCPROX, conf->eleprox.cdc); - for(int i = 0; i < ELECTRODE_COUNT; i += 2) - { - safe_write(REG_CDTx(i), REG_CDTx__CDT0(conf->ele[i].cdt) | - REG_CDTx__CDT1(conf->ele[i+1].cdt)); - } - safe_write(REG_CDTPROX, conf->eleprox.cdt); - /* Auto-Configuration */ - safe_write(REG_AUTO_CONF, REG_AUTO_CONF__ACE(conf->autoconf.en) | - REG_AUTO_CONF__ARE(conf->autoconf.ren) | - REG_AUTO_CONF__BVA(conf->cal_lock) | - REG_AUTO_CONF__RETRY(conf->autoconf.retry) | - REG_AUTO_CONF__FFI(conf->global.ffi)); - safe_write(REG_AUTO_CONF2, REG_AUTO_CONF2__ACFIE(conf->autoconf.acfie) | - REG_AUTO_CONF2__ARFIE(conf->autoconf.arfie) | - REG_AUTO_CONF2__OORIE(conf->autoconf.oorie) | - REG_AUTO_CONF2__SCTS(conf->autoconf.scts)); - safe_write(REG_USL, conf->autoconf.usl); - safe_write(REG_LSL, conf->autoconf.lsl); - safe_write(REG_TL, conf->autoconf.tl); - /* electrode configuration */ - safe_write(REG_ELECTRODE, REG_ELECTRODE__ELE_EN(conf->ele_en) | - REG_ELECTRODE__ELEPROX_EN(conf->eleprox_en) | - REG_ELECTRODE__CL(conf->cal_lock)); - /* gpio config */ - uint8_t ctl = 0; - for(int i = ELE_GPIO_FIRST; i <= ELE_GPIO_LAST; i++) - if(ELE_GPIO_CTL0(conf->ele[i].gpio)) - ctl |= REG_GPIO_CTL0__CTL0x(i); - safe_write(REG_GPIO_CTL0, ctl); - ctl = 0; - for(int i = ELE_GPIO_FIRST; i <= ELE_GPIO_LAST; i++) - if(ELE_GPIO_CTL1(conf->ele[i].gpio)) - ctl |= REG_GPIO_CTL1__CTL1x(i); - safe_write(REG_GPIO_CTL1, ctl); - ctl = 0; - for(int i = ELE_GPIO_FIRST; i <= ELE_GPIO_LAST; i++) - if(ELE_GPIO_DIR(conf->ele[i].gpio)) - ctl |= REG_GPIO_DIR__DIRx(i); - safe_write(REG_GPIO_DIR, ctl); - ctl = 0; - for(int i = ELE_GPIO_FIRST; i <= ELE_GPIO_LAST; i++) - if(ELE_GPIO_EN(conf->ele[i].gpio)) - ctl |= REG_GPIO_EN__ENx(i); - safe_write(REG_GPIO_EN, ctl); - - return 0; -} - -int mpr121_set_gpio_output(int ele, int gpio_val) -{ - switch(gpio_val) - { - case ELE_GPIO_SET: - return mpr121_write_reg(REG_GPIO_SET, REG_GPIO_SET__SETx(ele)); - case ELE_GPIO_CLR: - return mpr121_write_reg(REG_GPIO_CLR, REG_GPIO_CLR__CLRx(ele)); - case ELE_GPIO_TOG: - return mpr121_write_reg(REG_GPIO_TOG, REG_GPIO_TOG__TOGx(ele)); - default: - return -1; - } -} - -int mpr121_set_gpio_pwm(int ele, int pwm) -{ - uint8_t reg_val; - int ret = mpr121_read_reg(REG_PWMx(ele), ®_val); - if(ret) return ret; - if(REG_PWMx_IS_PWM0(ele)) - reg_val = (reg_val & ~REG_PWMx__PWM0_BM) | REG_PWMx__PWM0(pwm); - else - reg_val = (reg_val & ~REG_PWMx__PWM1_BM) | REG_PWMx__PWM1(pwm); - return mpr121_write_reg(REG_PWMx(ele), reg_val); -} - -int mpr121_get_touch_status(unsigned *status) -{ - uint8_t buf[2]; - int ret = i2c_readmem(i2c_addr, REG_TOUCH_STATUS, buf, 2); - if(!ret && status) - *status = buf[0] | buf[1]; - return ret; -} |