From 136d16ad4248d9cbd5aae871ffb76632ca8dfdc9 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Thu, 12 Jul 2018 10:51:47 +0200
Subject: [PATCH] Extend ESP8266 GPIO
---
include/esp8266/driver/gpio.h | 12 +++
src/arch/esp8266/driver/gpio.cc | 128 +++++++++++++++++++++++++++++++-
2 files changed, 137 insertions(+), 3 deletions(-)
diff --git a/include/esp8266/driver/gpio.h b/include/esp8266/driver/gpio.h
index 177e7c5..3db5d9d 100644
--- a/include/esp8266/driver/gpio.h
+++ b/include/esp8266/driver/gpio.h
@@ -7,10 +7,22 @@ class GPIO {
public:
GPIO () {}
+
+ enum Pin : unsigned char {
+ d3 = 0, tx, d4, rx, d2, d1,
+ d6 = 12, d7, d5, d8,
+ d0 = 16
+ };
+
void setup();
void led_on(unsigned char id);
void led_off(unsigned char id);
void led_toggle(unsigned char id);
+ void input(unsigned char const pin);
+ void input(unsigned char const pin, bool pullup);
+ void output(unsigned char const pin);
+ unsigned char read(unsigned char const pin);
+ void write(unsigned char const pin, unsigned char value);
};
extern GPIO gpio;
diff --git a/src/arch/esp8266/driver/gpio.cc b/src/arch/esp8266/driver/gpio.cc
index d06130d..dba22b0 100644
--- a/src/arch/esp8266/driver/gpio.cc
+++ b/src/arch/esp8266/driver/gpio.cc
@@ -22,7 +22,7 @@ void ICACHE_FLASH_ATTR GPIO::setup()
#endif
}
-void ICACHE_FLASH_ATTR GPIO::led_on(unsigned char id)
+void ICACHE_FLASH_ATTR GPIO::led_on(unsigned char const id)
{
#ifdef LED_ON_GPIO16
if (id == 0) {
@@ -35,7 +35,7 @@ void ICACHE_FLASH_ATTR GPIO::led_on(unsigned char id)
#endif
}
-void ICACHE_FLASH_ATTR GPIO::led_off(unsigned char id)
+void ICACHE_FLASH_ATTR GPIO::led_off(unsigned char const id)
{
#ifdef LED_ON_GPIO16
if (id == 0) {
@@ -48,7 +48,7 @@ void ICACHE_FLASH_ATTR GPIO::led_off(unsigned char id)
#endif
}
-void ICACHE_FLASH_ATTR GPIO::led_toggle(unsigned char id)
+void ICACHE_FLASH_ATTR GPIO::led_toggle(unsigned char const id)
{
#ifdef LED_ON_GPIO16
if (id == 0) {
@@ -69,4 +69,126 @@ void ICACHE_FLASH_ATTR GPIO::led_toggle(unsigned char id)
#endif
}
+void ICACHE_FLASH_ATTR GPIO::input(unsigned char const pin)
+{
+ if (pin == d0) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0);
+ } else if (pin == tx) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1);
+ } else if (pin == d4) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2);
+ } else if (pin == rx) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_GPIO3);
+ } else if (pin == d2) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4);
+ } else if (pin == d1) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5);
+ } else if (pin == d6) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12);
+ } else if (pin == d7) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13);
+ } else if (pin == d5) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14);
+ } else if (pin == d8) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, FUNC_GPIO15);
+ } else if (pin == d0) {
+ // TODO this sets it as output, not input
+ WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | (uint32)0x1);
+ WRITE_PERI_REG(RTC_GPIO_CONF, (READ_PERI_REG(RTC_GPIO_CONF) & (uint32)0xfffffffe) | (uint32)0x0);
+ WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & (uint32)0xfffffffe) | (uint32)0x1);
+ }
+ if (pin < d0) {
+ gpio_output_set(0, 0, 0, (1 << pin));
+ }
+}
+
+void ICACHE_FLASH_ATTR GPIO::input(unsigned char const pin, bool pullup)
+{
+ if (pin == d0) {
+ if (pullup) {
+ PIN_PULLUP_EN(PERIPHS_IO_MUX_GPIO0_U);
+ } else {
+ PIN_PULLUP_DIS(PERIPHS_IO_MUX_GPIO0_U);
+ }
+ } else if (pin == tx) {
+ if (pullup) {
+ PIN_PULLUP_EN(PERIPHS_IO_MUX_U0TXD_U);
+ } else {
+ PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0TXD_U);
+ }
+ } else if (pin == d4) {
+ if (pullup) {
+ PIN_PULLUP_EN(PERIPHS_IO_MUX_GPIO2_U);
+ } else {
+ PIN_PULLUP_DIS(PERIPHS_IO_MUX_GPIO2_U);
+ }
+ } else if (pin == rx) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_GPIO3);
+ } else if (pin == d2) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4);
+ } else if (pin == d1) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5);
+ } else if (pin == d6) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12);
+ } else if (pin == d7) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13);
+ } else if (pin == d5) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14);
+ } else if (pin == d8) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, FUNC_GPIO15);
+ } else if (pin == d0) {
+ // TODO this sets it as output, not input
+ WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | (uint32)0x1);
+ WRITE_PERI_REG(RTC_GPIO_CONF, (READ_PERI_REG(RTC_GPIO_CONF) & (uint32)0xfffffffe) | (uint32)0x0);
+ WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & (uint32)0xfffffffe) | (uint32)0x1);
+ }
+ input(pin);
+}
+
+void ICACHE_FLASH_ATTR GPIO::output(unsigned char const pin)
+{
+ if (pin == d0) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO0_U, FUNC_GPIO0);
+ } else if (pin == tx) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_GPIO1);
+ } else if (pin == d4) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2);
+ } else if (pin == rx) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_GPIO3);
+ } else if (pin == d2) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO4_U, FUNC_GPIO4);
+ } else if (pin == d1) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO5_U, FUNC_GPIO5);
+ } else if (pin == d6) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDI_U, FUNC_GPIO12);
+ } else if (pin == d7) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTCK_U, FUNC_GPIO13);
+ } else if (pin == d5) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTMS_U, FUNC_GPIO14);
+ } else if (pin == d8) {
+ PIN_FUNC_SELECT(PERIPHS_IO_MUX_MTDO_U, FUNC_GPIO15);
+ } else if (pin == d0) {
+ WRITE_PERI_REG(PAD_XPD_DCDC_CONF, (READ_PERI_REG(PAD_XPD_DCDC_CONF) & 0xffffffbc) | (uint32)0x1);
+ WRITE_PERI_REG(RTC_GPIO_CONF, (READ_PERI_REG(RTC_GPIO_CONF) & (uint32)0xfffffffe) | (uint32)0x0);
+ WRITE_PERI_REG(RTC_GPIO_ENABLE, (READ_PERI_REG(RTC_GPIO_ENABLE) & (uint32)0xfffffffe) | (uint32)0x1);
+ }
+ if (pin < d0) {
+ gpio_output_set(0, 0, (1 << pin), 0);
+ }
+}
+
+unsigned char ICACHE_FLASH_ATTR GPIO::read(unsigned char const pin)
+{
+ return (gpio_input_get() & (1 << pin));
+}
+
+void ICACHE_FLASH_ATTR GPIO::write(unsigned char const pin, unsigned char value)
+{
+ if (value) {
+ gpio_output_set(1 << pin, 0, 0, 0);
+ } else {
+ gpio_output_set(0, 1 << pin, 0, 0);
+ }
+}
+
GPIO gpio;
--
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