293 lines
9.0 KiB
C
293 lines
9.0 KiB
C
#include "device/gpio.h"
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#include "key/key_driver.h"
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#include "key/ctmu_key.h"
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#include "key/touch_key.h"
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#include "asm/ctmu.h"
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#include "app_config.h"
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#if TCFG_CTMU_TOUCH_KEY_ENABLE
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#define CTMU_CON0 JL_CTM->CON0
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#define CTMU_CON1 JL_CTM->CON1
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#define CTMU_RES JL_CTM->RES
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static sCTMU_KEY_VAR ctm_key_value;
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static const struct touch_key_platform_data *__this;
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static u8 port_index_mapping_talbe[CTMU_KEY_CH_MAX];
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//=================================================================================//
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/*
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ctmu原理:
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1.三个时钟源:
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1)闸门时钟源(可选), 分频值可以选
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2)放电时钟源(固定是lsb), 分频值可以选
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3)充电时钟源(不可选), 分频值不可选
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2.闸门时间内
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_________________________________
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__| |__
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__ __ __ __ __
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放电时计数 __| |__| |__| |__| |__| |__
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3. 过程: 放电 --> 充电(计数) --> 放电[该过程可选]
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4.分析计数值
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*/
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//=================================================================================//
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//时钟闸门时钟源选择, 可分频
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enum {
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GATE_SOURCE_LSB = 0,
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GATE_SOURCE_OSC,
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GATE_SOURCE_RTOSC,
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GATE_SOURCE_PLL12M,
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};
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enum {
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GATE_SOURCE_PRE_DIV1 = 0,
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GATE_SOURCE_PRE_DIV2,
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GATE_SOURCE_PRE_DIV4,
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GATE_SOURCE_PRE_DIV8,
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GATE_SOURCE_PRE_DIV16,
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GATE_SOURCE_PRE_DIV32,
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GATE_SOURCE_PRE_DIV64,
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GATE_SOURCE_PRE_DIV128,
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GATE_SOURCE_PRE_DIV256,
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GATE_SOURCE_PRE_DIV512,
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GATE_SOURCE_PRE_DIV1024,
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GATE_SOURCE_PRE_DIV2048,
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GATE_SOURCE_PRE_DIV4096,
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GATE_SOURCE_PRE_DIV8192,
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GATE_SOURCE_PRE_DIV16384,
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GATE_SOURCE_PRE_DIV32768,
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};
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//放电时钟源硬件上默认是lsb, 不可分频
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enum {
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DISCHARGE_SOURCE_PRE_DIV1 = 0,
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DISCHARGE_SOURCE_PRE_DIV2,
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DISCHARGE_SOURCE_PRE_DIV4,
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DISCHARGE_SOURCE_PRE_DIV8,
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DISCHARGE_SOURCE_PRE_DIV16,
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DISCHARGE_SOURCE_PRE_DIV32,
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DISCHARGE_SOURCE_PRE_DIV64,
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DISCHARGE_SOURCE_PRE_DIV128,
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};
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//充电时钟源不可选择, 不可分频
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enum {
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CHARGE_SOURCE_OSC = 0,
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CHARGE_SOURCE_LRC,
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CHARGE_SOURCE_PLL240M,
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CHARGE_SOURCE_PLL480M,
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};
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static const u8 ctmu_ch_table[] = {
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IO_PORTC_00, IO_PORTC_01, IO_PORTC_02, IO_PORTC_03,
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IO_PORTC_04, IO_PORTC_05, IO_PORTC_06, IO_PORTC_07,
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IO_PORTC_08, IO_PORTC_09, IO_PORTC_10, IO_PORTH_00,
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IO_PORTH_01, IO_PORTH_02, IO_PORTH_03, IO_PORTH_04,
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};
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static void ctm_irq(sCTMU_KEY_VAR *ctm_key_var, u32 ctm_res, u8 ch)
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{
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u16 temp_u16_0, temp_u16_1;
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s16 temp_s16_0, temp_s16_1;
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s32 temp_s32_0;
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u32 i;
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for (i = 0; i < CTMU_KEY_CH_MAX; ++i) {
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if (port_index_mapping_talbe[i] == ch) {
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/* printf("res : 0x%x, i : %d, ch : %d\n", ctm_res, i, ch); */
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ch = i;
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break;
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}
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}
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if (i == CTMU_KEY_CH_MAX) {
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return;
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}
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//..............................................................................................
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//取计数值/通道判断
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//..............................................................................................
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if (ctm_key_var->touch_init_cnt[ch]) {
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ctm_key_var->touch_init_cnt[ch]--;
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/* ctm_key_var->touch_cnt_buf[ch] = ctm_res << (ctm_key_var->FLT0CFG + 1); */
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/* ctm_key_var->touch_release_buf[ch] = ctm_res << (ctm_key_var->FLT1CFG0 + 1); */
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ctm_key_var->touch_cnt_buf[ch] = ctm_res << ctm_key_var->FLT0CFG;
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ctm_key_var->touch_release_buf[ch] = ctm_res << ctm_key_var->FLT1CFG0;
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}
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//..............................................................................................
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//当前计数值去抖动滤波器
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//..............................................................................................
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temp_u16_0 = ctm_key_var->touch_cnt_buf[ch];
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temp_u16_1 = temp_u16_0;
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temp_u16_1 -= (temp_u16_1 >> ctm_key_var->FLT0CFG);
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temp_u16_1 += ctm_res;
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ctm_key_var->touch_cnt_buf[ch] = temp_u16_1;
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temp_u16_0 += temp_u16_1;
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temp_u16_0 >>= (ctm_key_var->FLT0CFG + 1);
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//..............................................................................................
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//各通道按键释放计数值滤波器
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//..............................................................................................
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temp_s32_0 = ctm_key_var->touch_release_buf[ch];
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temp_u16_1 = temp_s32_0 >> ctm_key_var->FLT1CFG0; //获得滤波器之后的按键释放值
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temp_s16_0 = temp_u16_0 - temp_u16_1; //获得和本次检测值的差值，按下按键为负值，释放按键为正值
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temp_s16_1 = temp_s16_0;
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// if(ch == 1)
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// {
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/* printf("ch%d: %d %d", (short)ch, temp_u16_0, temp_s16_1); */
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// }
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if (!(ctm_key_var->touch_key_state & BIT(ch))) { //如果本通道按键目前是处于释放状态
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if (temp_s16_1 >= 0) { //当前计数值小于低通值，放大后参与运算
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if (temp_s16_1 < (ctm_key_var->FLT1CFG2 >> 3)) {
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temp_s16_1 = temp_s16_1 * 8; //temp_s16_1 <<= 3; //放大后参与运算
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} else {
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temp_s16_1 = ctm_key_var->FLT1CFG2; //饱和，防止某些较大的正偏差导致错判
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}
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} else if (temp_s16_1 >= ctm_key_var->FLT1CFG1) { //当前计数值小于低通值不多，正常参与运算
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} else { //当前计数值小于低通值很多，缩小后参与运算
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temp_s16_1 = temp_s16_1 / 8; //temp_s16_1 >>= 3;(有符号数右移自动扩展符号位???)
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}
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} else { //如果本通道按键目前是处于按下状态, 缓慢降低释放计数值
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if (temp_s16_1 <= ctm_key_var->RELEASECFG1) {
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temp_s16_1 >>= 3; //缩小后参与运算
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} else {
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temp_s16_1 = 0;
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}
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}
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temp_s32_0 += (s32)temp_s16_1;
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ctm_key_var->touch_release_buf[ch] = temp_s32_0;
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//..............................................................................................
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//按键按下与释放检测
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//..............................................................................................
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if (temp_s16_0 <= ctm_key_var->PRESSCFG) { //按键按下
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ctm_key_var->touch_key_state |= BIT(ch);
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} else if (temp_s16_0 >= ctm_key_var->RELEASECFG0) { //按键释放
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ctm_key_var->touch_key_state &= ~BIT(ch);
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}
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}
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___interrupt
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static void ctmu_isr_handle(void)
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{
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u32 res = CTMU_RES;
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u8 ch = CTMU_CON1 & 0xf;
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if (CTMU_CON1 & BIT(7)) {
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CTMU_CON1 |= BIT(6);
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ctm_irq(&ctm_key_value, res, ch);
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}
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}
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static void ctmu_port_init(const struct touch_key_port *port_list, u8 port_num)
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{
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u8 i, j;
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for (i = 0; i < port_num; i++) {
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gpio_set_pull_down(port_list[i].port, 0);
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gpio_set_pull_up(port_list[i].port, 0);
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gpio_set_die(port_list[i].port, 0);
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gpio_set_direction(port_list[i].port, 1);
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for (j = 0; j < ARRAY_SIZE(ctmu_ch_table); j++) {
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if (ctmu_ch_table[j] == port_list[i].port) {
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CTMU_CON1 |= (BIT(j) << 16);
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port_index_mapping_talbe[i] = j;
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}
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}
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}
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}
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static void touch_ctmu_init(const struct touch_key_port *port, u8 num)
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{
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CTMU_CON0 = 0;
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CTMU_CON1 = 0;
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//闸门时钟选择
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CTMU_CON0 |= (GATE_SOURCE_OSC << 2); //24 MHz
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CTMU_CON0 |= (GATE_SOURCE_PRE_DIV32768 << 5); //1.36ms
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/* CTMU_CON0 |= (1 << 8); //PRD 2.72ms */
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//振荡器电流配置，值越大，振荡器工作电流越大，振荡频率越高，应该根据芯片外围触摸按键实际的固有电容大小来配置，让振荡器的工作频率在1MHz附近
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CTMU_CON1 |= 3 << 8; //0 ~ 7 2ua //8ua
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//LDO enable
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CTMU_CON1 |= BIT(11);
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CTMU_CON1 |= BIT(13); //2.7V
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CTMU_CON1 |= BIT(6); // Clear Pending
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ctmu_port_init(port, num);
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}
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static void touch_ctmu_enable(u8 en)
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{
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if (en) {
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CTMU_CON0 |= BIT(1); //Int Enable
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CTMU_CON0 |= BIT(0); //Moudle Enable
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} else {
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CTMU_CON0 &= ~BIT(1); //Int Disable
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CTMU_CON0 &= ~BIT(0); //Moudle Disable
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}
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}
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int ctmu_init(void *_data)
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{
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const struct touch_key_platform_data *user_data = (const struct touch_key_platform_data *)_data;
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if (!user_data) {
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return -EINVAL;
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}
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__this = user_data;
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memset(&ctm_key_value, 0x0, sizeof(sCTMU_KEY_VAR));
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/*触摸按键参数配置*/
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ctm_key_value.FLT0CFG = 0;
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ctm_key_value.FLT1CFG0 = 7;
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ctm_key_value.FLT1CFG1 = -80;
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ctm_key_value.FLT1CFG2 = 10 * 128; //128 = 2^7
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///调节灵敏度的主要参数
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ctm_key_value.PRESSCFG = user_data->press_cfg;
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ctm_key_value.RELEASECFG0 = user_data->release_cfg0;
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ctm_key_value.RELEASECFG1 = user_data->release_cfg1;
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memset(&ctm_key_value.touch_init_cnt, 0x10, CTMU_KEY_CH_MAX);
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if (user_data->num > CTMU_KEY_CH_MAX) {
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return -EINVAL;
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}
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touch_ctmu_init(user_data->port_list, user_data->num);
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request_irq(IRQ_CTM_IDX, 1, ctmu_isr_handle, 0);
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touch_ctmu_enable(1);
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return 0;
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}
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u8 get_ctmu_value(void)
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{
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u8 key = NO_KEY;
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for (u8 i = 0; i < __this->num; i++) {
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if (ctm_key_value.touch_key_state & (u16)(BIT(i))) {
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key = i;
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break;
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}
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}
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return key;
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}
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#endif
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