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common.cpp
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common.cpp
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/*----------------------------------------------------------------------------/
Lovyan GFX - Graphics library for embedded devices.
Original Source:
https://github.com/lovyan03/LovyanGFX/
Licence:
[FreeBSD](https://github.com/lovyan03/LovyanGFX/blob/master/license.txt)
Author:
[lovyan03](https://twitter.com/lovyan03)
Contributors:
[ciniml](https://github.com/ciniml)
[mongonta0716](https://github.com/mongonta0716)
[tobozo](https://github.com/tobozo)
/----------------------------------------------------------------------------*/
#if defined (ESP_PLATFORM)
#include <sdkconfig.h>
#include "common.hpp"
#include <algorithm>
#include <string.h>
#include <math.h>
#include <freertos/FreeRTOS.h>
#include <freertos/semphr.h>
#include <driver/i2c.h>
#include <driver/spi_common.h>
#include <driver/spi_master.h>
#include <driver/rtc_io.h>
#include <soc/rtc.h>
#include <soc/soc.h>
#include <soc/i2c_reg.h>
#include <soc/i2c_struct.h>
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0))
#include <soc/syscon_reg.h>
#else
#include <soc/apb_ctrl_reg.h>
#endif
#include <soc/efuse_reg.h>
#include <esp_log.h>
#if __has_include (<soc/soc_caps.h>)
#include <soc/soc_caps.h>
#endif
#if __has_include (<esp_private/periph_ctrl.h>)
#include <esp_private/periph_ctrl.h>
#else
#include <driver/periph_ctrl.h>
#endif
#if __has_include(<esp_arduino_version.h>)
#include <esp_arduino_version.h>
#endif
#ifndef SOC_GPIO_SUPPORT_RTC_INDEPENDENT
#define SOC_GPIO_SUPPORT_RTC_INDEPENDENT 0
#endif
#if defined (ESP_IDF_VERSION_VAL)
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
#include <hal/gpio_hal.h>
#endif
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(3, 4, 0)
#if defined (ESP_ARDUINO_VERSION_VAL)
#if ESP_ARDUINO_VERSION < ESP_ARDUINO_VERSION_VAL(2, 0, 3)
#define LGFX_EFUSE_WORKAROUND
#endif
#else
#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(4, 4, 0)
#define LGFX_EFUSE_WORKAROUND
#endif
#endif
#if defined ( LGFX_EFUSE_WORKAROUND )
// include <esp_efuse.h> でエラーが出るバージョンが存在するため、エラー回避用の記述を行ってからincludeする。;
#define _ROM_SECURE_BOOT_H_
#define MAX_KEY_DIGESTS 3
struct ets_secure_boot_key_digests
{
const void *key_digests[MAX_KEY_DIGESTS];
bool allow_key_revoke;
};
typedef struct ets_secure_boot_key_digests ets_secure_boot_key_digests_t;
#endif
#include <esp_efuse.h>
#define USE_ESP_EFUSE_GET_PKG_VER
#endif
#endif
#if __has_include(<soc/i2c_periph.h>)
#include <soc/i2c_periph.h>
#endif
#if defined (SOC_GDMA_SUPPORTED) // for C3/S3
#include <soc/gdma_reg.h>
#include <soc/gdma_struct.h>
// S3とC3で同じレジスタに異なる定義名がついているため、ここで統一;
#if !defined (DMA_OUT_PERI_SEL_CH0_REG)
#define DMA_OUT_PERI_SEL_CH0_REG GDMA_OUT_PERI_SEL_CH0_REG
#endif
#if !defined (DMA_IN_PERI_SEL_CH0_REG)
#define DMA_IN_PERI_SEL_CH0_REG GDMA_IN_PERI_SEL_CH0_REG
#endif
#endif
#if (ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 3, 0))
#define SOC_GDMA_PAIRS_PER_GROUP_MAX SOC_GDMA_PAIRS_PER_GROUP
#endif
#if defined ( ARDUINO )
#if __has_include (<SPI.h>)
#include <SPI.h>
#endif
#if __has_include (<Wire.h>)
#include <Wire.h>
#endif
#endif
namespace lgfx
{
inline namespace v1
{
//----------------------------------------------------------------------------
static __attribute__ ((always_inline)) inline volatile uint32_t* reg(uint32_t addr) { return (volatile uint32_t *)ETS_UNCACHED_ADDR(addr); }
uint32_t getApbFrequency(void)
{
rtc_cpu_freq_config_t conf;
rtc_clk_cpu_freq_get_config(&conf);
if (conf.freq_mhz >= 80){
return 80 * 1000000;
}
return (conf.source_freq_mhz * 1000000) / conf.div;
}
uint32_t FreqToClockDiv(uint32_t fapb, uint32_t hz)
{
if (fapb <= hz) return SPI_CLK_EQU_SYSCLK;
uint32_t div_num = fapb / (1 + hz);
uint32_t pre = div_num / 64u;
div_num = div_num / (pre+1);
return div_num << 12 | ((div_num-1)>>1) << 6 | div_num | pre << 18;
}
void calcClockDiv(uint32_t* div_a, uint32_t* div_b, uint32_t* div_n, uint32_t* clkcnt, uint32_t baseClock, uint32_t targetFreq)
{
uint32_t diff = INT32_MAX;
*div_n = 256;
*div_a = 63;
*div_b = 62;
*clkcnt = 64;
uint32_t start_cnt = std::min<uint32_t>(64u, (baseClock / (targetFreq * 2) + 1));
uint32_t end_cnt = std::max<uint32_t>(2u, baseClock / 256u / targetFreq);
if (start_cnt <= 2) { end_cnt = 1; }
for (uint32_t cnt = start_cnt; diff && cnt >= end_cnt; --cnt)
{
float fdiv = (float)baseClock / cnt / targetFreq;
uint32_t n = std::max<uint32_t>(2u, (uint32_t)fdiv);
fdiv -= n;
for (uint32_t a = 63; diff && a > 0; --a)
{
uint32_t b = roundf(fdiv * a);
if (a == b && n == 256) {
break;
}
uint32_t freq = baseClock / ((n * cnt) + (float)(b * cnt) / (float)a);
uint32_t d = abs((int)targetFreq - (int)freq);
if (diff <= d) { continue; }
diff = d;
*clkcnt = cnt;
*div_n = n;
*div_b = b;
*div_a = a;
if (b == 0 || a == b) {
break;
}
}
}
if (*div_a == *div_b)
{
*div_b = 0;
*div_n += 1;
}
}
uint32_t get_pkg_ver(void)
{
#if defined ( USE_ESP_EFUSE_GET_PKG_VER )
return esp_efuse_get_pkg_ver();
#else
uint32_t pkg_ver = REG_GET_FIELD(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_VER_PKG);
if (pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4)
{
if (REG_READ(APB_CTRL_DATE_REG) & 0x80000000)
{ // ESP32PICOV302
return 6;
}
}
return pkg_ver;
#endif
}
int32_t search_dma_out_ch(int peripheral_select)
{
#if defined ( SOC_GDMA_SUPPORTED ) // for ESP32S3 / ESP32C3
// ESP32C3: SPI2==0
// ESP32S3: SPI2==0 / SPI3==1
// SOC_GDMA_TRIG_PERIPH_SPI3
// SOC_GDMA_TRIG_PERIPH_LCD0
// GDMAペリフェラルレジスタの配列を順に調べてペリフェラル番号が一致するDMAチャンネルを特定する;
for (int i = 0; i < SOC_GDMA_PAIRS_PER_GROUP_MAX; ++i)
{
// ESP_LOGD("DBG","GDMA.channel:%d peri_sel:%d", i, GDMA.channel[i].out.peri_sel.sel);
if ((*reg(DMA_OUT_PERI_SEL_CH0_REG + i * sizeof(GDMA.channel[0])) & 0x3F) == peripheral_select)
{
// ESP_LOGD("DBG","GDMA.channel:%d hit", i);
return i;
}
}
#endif
return -1;
}
int32_t search_dma_in_ch(int peripheral_select)
{
#if defined ( SOC_GDMA_SUPPORTED ) // for ESP32S3 / ESP32C3
// ESP32C3: SPI2==0
// ESP32S3: SPI2==0 / SPI3==1
// SOC_GDMA_TRIG_PERIPH_SPI3
// SOC_GDMA_TRIG_PERIPH_LCD0
// GDMAペリフェラルレジスタの配列を順に調べてペリフェラル番号が一致するDMAチャンネルを特定する;
for (int i = 0; i < SOC_GDMA_PAIRS_PER_GROUP_MAX; ++i)
{
// ESP_LOGD("DBG","GDMA.channel:%d peri_sel:%d", i, GDMA.channel[i].out.peri_sel.sel);
if ((*reg(DMA_IN_PERI_SEL_CH0_REG + i * sizeof(GDMA.channel[0])) & 0x3F) == peripheral_select)
{
// ESP_LOGD("DBG","GDMA.channel:%d hit", i);
return i;
}
}
#endif
return -1;
}
void debug_memory_dump(const void* src, size_t len)
{
auto s = (const uint32_t*)src;
do
{
printf("0x%08x = 0x%08x\n", (int)s, (int)s[0]);
++s;
len -= 4;
} while (len > 0);
}
//----------------------------------------------------------------------------
void pinMode(int_fast16_t pin, pin_mode_t mode)
{
auto gpio_num = (gpio_num_t)pin;
if ((size_t)gpio_num >= GPIO_NUM_MAX) return;
/// GPIO OUTPUT enの場合はGPIO_ENABLE_W1TS, disの場合はGPIO_ENABLE_W1TCの該当ビットを立てる。
/// レジスタのアドレスをテーブル化しておき、演算で対象レジスタを切り替える。
static constexpr volatile uint32_t* gpio_en_regs[] =
{
(volatile uint32_t*)GPIO_ENABLE_W1TC_REG,
(volatile uint32_t*)GPIO_ENABLE_W1TS_REG,
#if defined ( GPIO_ENABLE1_W1TC_REG )
(volatile uint32_t*)GPIO_ENABLE1_W1TC_REG,
(volatile uint32_t*)GPIO_ENABLE1_W1TS_REG,
#endif
};
/// pin番号が32未満かどうかで分岐する。 bit0は OUTPUT enか否かで切替。
auto gpio_en_reg = gpio_en_regs[((pin >> 5) << 1) + (mode == pin_mode_t::output ? 1 : 0)];
*gpio_en_reg = 1u << (pin & 31);
auto io_mux_reg = (volatile uint32_t*)(GPIO_PIN_MUX_REG[pin]);
auto io_mux_val = *io_mux_reg; // & ~(FUN_PU_M | FUN_PD_M | SLP_PU_M | SLP_PD_M | MCU_SEL_M);
#if SOC_RTCIO_INPUT_OUTPUT_SUPPORTED
if (!SOC_GPIO_SUPPORT_RTC_INDEPENDENT && rtc_gpio_is_valid_gpio(gpio_num)) {
rtc_gpio_deinit(gpio_num);
if (mode == pin_mode_t::input_pulldown)
{ rtc_gpio_pulldown_en((gpio_num_t)pin); }
else
{ rtc_gpio_pulldown_dis((gpio_num_t)pin); }
if (mode == pin_mode_t::input_pullup)
{ rtc_gpio_pullup_en((gpio_num_t)pin); }
else
{ rtc_gpio_pullup_dis((gpio_num_t)pin); }
}
else
#endif
{
io_mux_val &= ~(FUN_PU_M | FUN_PD_M | SLP_PU_M | SLP_PD_M);
switch (mode) {
case pin_mode_t::input_pullup: io_mux_val |= FUN_PU_M | SLP_PU_M; break;
case pin_mode_t::input_pulldown: io_mux_val |= FUN_PD_M | SLP_PD_M; break;
default: break;
}
}
io_mux_val &= ~(MCU_SEL_M);
io_mux_val |= FUN_IE_M | (PIN_FUNC_GPIO << MCU_SEL_S);
*io_mux_reg = io_mux_val;
GPIO.pin[pin].pad_driver = 0; // 1 = OpenDrain / 0 = normal output
GPIO.func_out_sel_cfg[pin].func_sel = SIG_GPIO_OUT_IDX;
}
//----------------------------------------------------------------------------
namespace gpio
{
pin_backup_t::pin_backup_t(int pin_num)
: _pin_num { static_cast<gpio_num_t>(pin_num) }
{
backup();
}
void pin_backup_t::backup(void)
{
auto pin_num = (size_t)_pin_num;
if (pin_num < GPIO_NUM_MAX)
{
_io_mux_gpio_reg = *reinterpret_cast<uint32_t*>(GPIO_PIN_MUX_REG[pin_num]);
_gpio_pin_reg = *reinterpret_cast<uint32_t*>(GPIO_PIN0_REG + (pin_num * 4));
_gpio_func_out_reg = *reinterpret_cast<uint32_t*>(GPIO_FUNC0_OUT_SEL_CFG_REG + (pin_num * 4));
#if defined ( GPIO_ENABLE1_REG )
_gpio_enable = *reinterpret_cast<uint32_t*>(((_pin_num & 32) ? GPIO_ENABLE1_REG : GPIO_ENABLE_REG)) & (1 << (_pin_num & 31));
#else
_gpio_enable = *reinterpret_cast<uint32_t*>(GPIO_ENABLE_REG) & (1 << (_pin_num & 31));
#endif
}
}
void pin_backup_t::restore(void)
{
auto pin_num = (size_t)_pin_num;
if (pin_num < GPIO_NUM_MAX)
{
// ESP_LOGD("DEBUG","restore pin:%d ", _pin_num);
// ESP_LOGD("DEBUG","restore IO_MUX_GPIO0_REG :%08x -> %08x ", *reinterpret_cast<uint32_t*>(GPIO_PIN_MUX_REG[_pin_num] ), _io_mux_gpio_reg );
// ESP_LOGD("DEBUG","restore GPIO_PIN0_REG :%08x -> %08x ", *reinterpret_cast<uint32_t*>(GPIO_PIN0_REG + (_pin_num * 4)), _gpio_pin_reg );
// ESP_LOGD("DEBUG","restore GPIO_FUNC0_OUT_SEL_CFG_REG:%08x -> %08x ", *reinterpret_cast<uint32_t*>(GPIO_FUNC0_OUT_SEL_CFG_REG + (_pin_num * 4)), _gpio_func_out_reg );
*reinterpret_cast<uint32_t*>(GPIO_PIN_MUX_REG[_pin_num]) = _io_mux_gpio_reg;
*reinterpret_cast<uint32_t*>(GPIO_PIN0_REG + (_pin_num * 4)) = _gpio_pin_reg;
*reinterpret_cast<uint32_t*>(GPIO_FUNC0_OUT_SEL_CFG_REG + (_pin_num * 4)) = _gpio_func_out_reg;
#if defined ( GPIO_ENABLE1_REG )
auto gpio_enable_reg = reinterpret_cast<uint32_t*>(((_pin_num & 32) ? GPIO_ENABLE1_REG : GPIO_ENABLE_REG));
#else
auto gpio_enable_reg = reinterpret_cast<uint32_t*>(GPIO_ENABLE_REG);
#endif
uint32_t pin_mask = 1 << (_pin_num & 31);
uint32_t val = *gpio_enable_reg;
// ESP_LOGD("DEBUG","restore GPIO_ENABLE_REG:%08x", *gpio_enable_reg);
if (_gpio_enable)
{
val |= pin_mask;
}
else
{
val &= ~pin_mask;
}
*gpio_enable_reg = val;
// ESP_LOGD("DEBUG","restore GPIO_ENABLE_REG:%08x", *gpio_enable_reg);
}
}
bool command(command_t cmd, uint8_t val)
{
bool res = false;
switch (cmd)
{
case command_read: res = gpio_in(val); break;
case command_write_low: gpio_lo(val); break;
case command_write_high: gpio_hi(val); break;
case command_delay: delay(val); break;
default:
if ((cmd >> 2) == (command_mode_output >> 2)) {
pin_mode_t mode = pin_mode_t::output;
switch (cmd)
{
case command_mode_input: mode = pin_mode_t::input; break;
case command_mode_input_pulldown: mode = pin_mode_t::input_pulldown; break;
case command_mode_input_pullup: mode = pin_mode_t::input_pullup; break;
default: break;
}
pinMode(val, mode);
}
break;
}
return res;
}
uint32_t command(const uint8_t* cmd_list)
{
uint32_t result = 0;
while (cmd_list[0] != command_end)
{
auto cmd = (command_t)cmd_list[0];
bool res = command(cmd, cmd_list[1]);
if (cmd == command_read) {
result = (result << 1) + res;
}
cmd_list += 2;
}
return result;
}
}
//----------------------------------------------------------------------------
namespace spi
{
#if !defined ( SPI_MOSI_DLEN_REG )
static constexpr uint32_t SPI_EXECUTE = SPI_USR | SPI_UPDATE;
#define SPI_MOSI_DLEN_REG(i) (REG_SPI_BASE(i) + 0x1C)
#define SPI_MISO_DLEN_REG(i) (REG_SPI_BASE(i) + 0x1C)
#else
static constexpr uint32_t SPI_EXECUTE = SPI_USR;
#endif
#if !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32)
static constexpr int default_spi_host = VSPI_HOST;
static constexpr int spi_periph_num = 3;
#else
static constexpr int default_spi_host = SPI2_HOST;
static constexpr int spi_periph_num = SOC_SPI_PERIPH_NUM;
#endif
#if defined ( ARDUINO )
static spi_t* _spi_handle[spi_periph_num] = {nullptr};
#endif
static spi_device_handle_t _spi_dev_handle[spi_periph_num] = {nullptr};
cpp::result<void, error_t> init(int spi_host, int spi_sclk, int spi_miso, int spi_mosi)
{
return init(spi_host, spi_sclk, spi_miso, spi_mosi, 0); // SPI_DMA_CH_AUTO;
}
cpp::result<void, error_t> init(int spi_host, int spi_sclk, int spi_miso, int spi_mosi, int dma_channel)
{
//ESP_LOGI("LGFX","spi::init host:%d, sclk:%d, miso:%d, mosi:%d, dma:%d", spi_host, spi_sclk, spi_miso, spi_mosi, dma_channel);
uint32_t spi_port = (spi_host + 1);
(void)spi_port;
if (spi_sclk >= 0) {
gpio_lo(spi_sclk); // ここでLOWにしておくことで、pinMode変更によるHIGHパルスが出力されるのを防止する (CSなしパネル対策);
}
#if defined (ARDUINO) && __has_include (<SPI.h>) // Arduino ESP32
if (spi_host == default_spi_host)
{
SPI.end();
SPI.begin(spi_sclk, spi_miso, spi_mosi);
_spi_handle[spi_host] = SPI.bus();
}
if (_spi_handle[spi_host] == nullptr)
{
_spi_handle[spi_host] = spiStartBus(spi_port, SPI_CLK_EQU_SYSCLK, 0, 0);
}
#endif
// バスの設定にはESP-IDFのSPIドライバを使用する。;
if (_spi_dev_handle[spi_host] == nullptr)
{
spi_bus_config_t buscfg;
memset(&buscfg, ~0u, sizeof(spi_bus_config_t));
buscfg.mosi_io_num = spi_mosi;
buscfg.miso_io_num = spi_miso;
buscfg.sclk_io_num = spi_sclk;
buscfg.max_transfer_sz = 1;
buscfg.flags = SPICOMMON_BUSFLAG_MASTER;
buscfg.intr_flags = 0;
#if defined (ESP_IDF_VERSION_VAL)
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0))
buscfg.isr_cpu_id = ESP_INTR_CPU_AFFINITY_AUTO;
#else
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 0))
buscfg.isr_cpu_id = INTR_CPU_ID_AUTO;
#endif
#endif
#endif
if (ESP_OK != spi_bus_initialize(static_cast<spi_host_device_t>(spi_host), &buscfg, dma_channel))
{
ESP_LOGW("LGFX", "Failed to spi_bus_initialize. ");
}
spi_device_interface_config_t devcfg;
memset(&devcfg, 0, sizeof(devcfg));
devcfg.clock_speed_hz = 10000000;
devcfg.spics_io_num = -1;
devcfg.flags = SPI_DEVICE_3WIRE | SPI_DEVICE_HALFDUPLEX;
devcfg.queue_size = 1;
if (ESP_OK != spi_bus_add_device(static_cast<spi_host_device_t>(spi_host), &devcfg, &_spi_dev_handle[spi_host])) {
ESP_LOGW("LGFX", "Failed to spi_bus_add_device. ");
}
}
*reg(SPI_USER_REG(spi_port)) = SPI_USR_MOSI | SPI_USR_MISO | SPI_DOUTDIN; // need SD card access (full duplex setting)
*reg(SPI_CTRL_REG(spi_port)) = 0;
#if defined ( SPI_CTRL1_REG )
*reg(SPI_CTRL1_REG(spi_port)) = 0;
#endif
#if defined ( SPI_CTRL2_REG )
*reg(SPI_CTRL2_REG(spi_port)) = 0;
#endif
return {};
}
void release(int spi_host)
{
//ESP_LOGI("LGFX","spi::release");
#if defined (ARDUINO) && __has_include (<SPI.h>) // Arduino ESP32
if (_spi_handle[spi_host] != nullptr)
{
if (spi_host == default_spi_host)
{
SPI.end();
}
else
{
spiStopBus(_spi_handle[spi_host]);
}
_spi_handle[spi_host] = nullptr;
}
#endif
if (_spi_dev_handle[spi_host] != nullptr)
{
spi_bus_remove_device(_spi_dev_handle[spi_host]);
spi_bus_free(static_cast<spi_host_device_t>(spi_host));
_spi_dev_handle[spi_host] = nullptr;
}
}
void beginTransaction(int spi_host)
{
#if defined (ARDUINO) // Arduino ESP32
spiSimpleTransaction(_spi_handle[spi_host]);
#else // ESP-IDF
if (_spi_dev_handle[spi_host]) {
if (ESP_OK != spi_device_acquire_bus(_spi_dev_handle[spi_host], portMAX_DELAY)) {
ESP_LOGW("LGFX", "Failed to spi_device_acquire_bus. ");
}
#if defined ( SOC_GDMA_SUPPORTED )
*reg(SPI_DMA_CONF_REG((spi_host + 1))) = 0; /// Clear previous transfer
#endif
}
#endif
}
void beginTransaction(int spi_host, uint32_t freq, int spi_mode)
{
uint32_t spi_port = (spi_host + 1);
(void)spi_port;
uint32_t clkdiv = FreqToClockDiv(getApbFrequency(), freq);
uint32_t user = SPI_USR_MOSI | SPI_USR_MISO | SPI_DOUTDIN;
if (spi_mode == 1 || spi_mode == 2) user |= SPI_CK_OUT_EDGE;
uint32_t pin = 0;
if (spi_mode & 2) pin = SPI_CK_IDLE_EDGE;
beginTransaction(spi_host);
*reg(SPI_USER_REG(spi_port)) = user;
#if defined (SPI_PIN_REG)
*reg(SPI_PIN_REG(spi_port)) = pin;
#else
*reg(SPI_MISC_REG( spi_port)) = pin;
#endif
*reg(SPI_CLOCK_REG(spi_port)) = clkdiv;
#if defined ( SPI_UPDATE )
*reg(SPI_CMD_REG(spi_port)) = SPI_UPDATE;
#endif
}
void endTransaction(int spi_host)
{
if (_spi_dev_handle[spi_host]) {
#if defined (ARDUINO) // Arduino ESP32
spiEndTransaction(_spi_handle[spi_host]);
#else // ESP-IDF
spi_device_release_bus(_spi_dev_handle[spi_host]);
#endif
}
}
void endTransaction(int spi_host, int spi_cs)
{
if (_spi_dev_handle[spi_host]) {
#if defined (ARDUINO) // Arduino ESP32
spiEndTransaction(_spi_handle[spi_host]);
#else // ESP-IDF
spi_device_release_bus(_spi_dev_handle[spi_host]);
#endif
}
gpio_hi(spi_cs);
}
void writeBytes(int spi_host, const uint8_t* data, size_t len)
{
uint32_t spi_port = (spi_host + 1);
(void)spi_port;
if (len > 64) len = 64;
memcpy(reinterpret_cast<void*>(SPI_W0_REG(spi_port)), data, (len + 3) & ~3);
*reg(SPI_MOSI_DLEN_REG(spi_port)) = (len << 3) - 1;
*reg(SPI_CMD_REG( spi_port)) = SPI_EXECUTE;
while (*reg(SPI_CMD_REG(spi_port)) & SPI_USR);
}
void readBytes(int spi_host, uint8_t* data, size_t len)
{
uint32_t spi_port = (spi_host + 1);
(void)spi_port;
if (len > 64) len = 64;
memcpy(reinterpret_cast<void*>(SPI_W0_REG(spi_port)), data, (len + 3) & ~3);
*reg(SPI_MOSI_DLEN_REG(spi_port)) = (len << 3) - 1;
*reg(SPI_CMD_REG( spi_port)) = SPI_EXECUTE;
while (*reg(SPI_CMD_REG(spi_port)) & SPI_USR);
memcpy(data, reinterpret_cast<const void*>(SPI_W0_REG(spi_port)), len);
}
}
//----------------------------------------------------------------------------
namespace i2c
{
#if __has_include( <core_version.h> )
#include <core_version.h>
#endif
#if !defined ( I2C_ACK_ERR_INT_RAW_M )
#define I2C_ACK_ERR_INT_RAW_M I2C_NACK_INT_RAW_M
#endif
#if __has_include(<soc/i2c_periph.h>)
static periph_module_t getPeriphModule(int num)
{
return i2c_periph_signal[num].module;
}
#else
static periph_module_t getPeriphModule(int num)
{
return num == 0 ? PERIPH_I2C0_MODULE : PERIPH_I2C1_MODULE;
}
#endif
static i2c_dev_t* getDev(int num)
{
#if defined ( CONFIG_IDF_TARGET_ESP32C3 )
return &I2C0;
#else
return num == 0 ? &I2C0 : &I2C1;
#endif
}
#if defined ( CONFIG_IDF_TARGET_ESP32C3 ) || defined ( CONFIG_IDF_TARGET_ESP32S3 )
static void updateDev(i2c_dev_t* dev)
{
dev->ctr.conf_upgate = 1;
}
static volatile uint32_t* getFifoAddr(int num)
{
#if defined ( CONFIG_IDF_TARGET_ESP32S3 )
return &(getDev(num)->data.val);
#else
return &(getDev(num)->fifo_data.val);
#endif
}
static constexpr int i2c_cmd_start = 6;
static constexpr int i2c_cmd_write = 1;
static constexpr int i2c_cmd_read = 3;
static constexpr int i2c_cmd_stop = 2;
static constexpr int i2c_cmd_end = 4;
#else
static void updateDev(i2c_dev_t* dev)
{
}
static volatile uint32_t* getFifoAddr(int num)
{
return (volatile uint32_t*)((num == 0) ? 0x6001301c : 0x6002701c);
}
static constexpr int i2c_cmd_start = 0;
static constexpr int i2c_cmd_write = 1;
static constexpr int i2c_cmd_read = 2;
static constexpr int i2c_cmd_stop = 3;
static constexpr int i2c_cmd_end = 4;
#endif
static constexpr int I2C_7BIT_ADDR_MIN = 0x08;
static constexpr int I2C_7BIT_ADDR_MAX = 0x77;
static constexpr int I2C_10BIT_ADDR_MAX = 1023;
struct i2c_context_t
{
enum state_t
{
state_disconnect,
state_write,
state_read
};
cpp::result<state_t, error_t> state;
SemaphoreHandle_t mtx = nullptr;
void lock(uint32_t msec = portMAX_DELAY) {
if (mtx == nullptr) {
mtx = xSemaphoreCreateMutex();
}
xSemaphoreTake(mtx, msec);
}
void unlock(void) {
xSemaphoreGive(mtx);
}
gpio_num_t pin_scl = (gpio_num_t)-1;
gpio_num_t pin_sda = (gpio_num_t)-1;
uint8_t wait_ack_stage = 0; // 0:Not waiting. / 1:Waiting after addressing. / 2:Waiting during data transmission.
bool initialized = false;
uint32_t freq = 0;
void save_reg(i2c_dev_t* dev)
{
auto reg = (volatile uint32_t*)dev;
#if defined ( CONFIG_IDF_TARGET_ESP32S3 )
auto fifo_reg = (volatile uint32_t*)(&dev->data);
#else
auto fifo_reg = (volatile uint32_t*)(&dev->fifo_data);
#endif
for (size_t i = 0; i < sizeof(_reg_store) >> 2; ++i)
{
if (fifo_reg == ®[i]) { continue; }
_reg_store[i] = reg[i];
}
}
void load_reg(i2c_dev_t* dev)
{
auto reg = (volatile uint32_t*)dev;
#if defined ( CONFIG_IDF_TARGET_ESP32S3 )
auto fifo_reg = (volatile uint32_t*)(&dev->data);
#else
auto fifo_reg = (volatile uint32_t*)(&dev->fifo_data);
#endif
for (size_t i = 0; i < sizeof(_reg_store) >> 2; ++i)
{
if (fifo_reg == ®[i]) { continue; }
reg[i] = _reg_store[i];
}
}
void setPins(i2c_dev_t* dev, gpio_num_t scl, gpio_num_t sda)
{
pin_sda = sda;
pin_scl = scl;
#if defined ( ARDUINO ) && __has_include (<Wire.h>)
#if defined ( ESP_IDF_VERSION_VAL )
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0)
#if defined ARDUINO_ESP32_GIT_VER
#if ARDUINO_ESP32_GIT_VER != 0x44c11981
#define USE_TWOWIRE_SETPINS
#endif
#endif
#endif
#endif
auto twowire = ((dev == &I2C0) ? &Wire : &Wire1);
#if defined ( USE_TWOWIRE_SETPINS )
twowire->setPins(sda, scl);
#else
twowire->begin((int)sda, (int)scl);
#endif
#endif
}
private:
uint32_t _reg_store[22];
};
i2c_context_t i2c_context[I2C_NUM_MAX];
static int32_t getRxFifoCount(i2c_dev_t* dev)
{
#if defined ( CONFIG_IDF_TARGET_ESP32C3 )
return dev->sr.rx_fifo_cnt;
#elif defined ( CONFIG_IDF_TARGET_ESP32S3 )
return dev->sr.rxfifo_cnt;
#else
return dev->status_reg.rx_fifo_cnt;
#endif
}
static void i2c_set_cmd(i2c_dev_t* dev, uint8_t index, uint8_t op_code, uint8_t byte_num, bool flg_nack = false)
{
/*
typeof(dev->command[0]) cmd;
cmd.val = 0;
cmd.ack_en = (op_code == i2c_cmd_write || op_code == i2c_cmd_stop);
cmd.byte_num = byte_num;
cmd.op_code = op_code;
dev->command[index].val = cmd.val;
*/
uint32_t cmd_val = byte_num
| (( op_code == i2c_cmd_write
|| op_code == i2c_cmd_stop)
? 0x100 : 0) // writeおよびstop時はACK_ENを有効にする;
| op_code << 11 ;
if (flg_nack && op_code == i2c_cmd_read) {
cmd_val |= (1 << 10); // ACK_VALUE (set NACK)
}
#if defined (CONFIG_IDF_TARGET_ESP32S3)
#if (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 3) && ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 1, 0)) \
|| (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 1, 1) && ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 2, 0)) \
|| (ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0))
(&dev->comd[0])[index].val = cmd_val;
#else
(&dev->comd0)[index].val = cmd_val;
#endif
#else
dev->command[index].val = cmd_val;
#endif
}
static void i2c_stop(int i2c_port)
{
#if 1 // !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32)
static constexpr int I2C_CLR_BUS_HALF_PERIOD_US = 2;
static constexpr int I2C_CLR_BUS_SCL_NUM = 9;
gpio_num_t sda_io = i2c_context[i2c_port].pin_sda;
gpio_set_level(sda_io, 1);
gpio_set_direction(sda_io, GPIO_MODE_INPUT_OUTPUT_OD);
gpio_num_t scl_io = i2c_context[i2c_port].pin_scl;
gpio_set_level(scl_io, 1);
gpio_set_direction(scl_io, GPIO_MODE_OUTPUT_OD);
delayMicroseconds(I2C_CLR_BUS_HALF_PERIOD_US);
auto mod = getPeriphModule(i2c_port);
// ESP-IDF環境でperiph_module_disableを使うと、後でenableできなくなる問題が起きたためコメントアウト;
//periph_module_disable(mod);
// SDAがHIGHになるまでSTOP送出を繰り返す。;
int i = 0;
do
{
gpio_set_level(scl_io, 0);
delayMicroseconds(I2C_CLR_BUS_HALF_PERIOD_US);
gpio_set_level(sda_io, 0);
delayMicroseconds(I2C_CLR_BUS_HALF_PERIOD_US);
gpio_set_level(scl_io, 1);
delayMicroseconds(I2C_CLR_BUS_HALF_PERIOD_US);
gpio_set_level(sda_io, 1);
delayMicroseconds(I2C_CLR_BUS_HALF_PERIOD_US);
} while (!gpio_get_level(sda_io) && (i++ < I2C_CLR_BUS_SCL_NUM));
periph_module_enable(mod);
#if !defined (CONFIG_IDF_TARGET_ESP32C3)
/// ESP32C3で periph_module_reset を使用すると以後通信不能になる問題が起きたため分岐;
periph_module_reset(mod);
#endif
i2c_set_pin((i2c_port_t)i2c_port, sda_io, scl_io, gpio_pullup_t::GPIO_PULLUP_ENABLE, gpio_pullup_t::GPIO_PULLUP_ENABLE, I2C_MODE_MASTER);
#else
auto mod = getPeriphModule(i2c_port);
periph_module_enable(mod);
auto dev = getDev(i2c_port);
dev->scl_sp_conf.scl_rst_slv_num = 9;
dev->scl_sp_conf.scl_rst_slv_en = 0;
updateDev(dev);
dev->scl_sp_conf.scl_rst_slv_en = 1;
gpio_num_t sda_io = i2c_context[i2c_port].pin_sda;
gpio_num_t scl_io = i2c_context[i2c_port].pin_scl;
periph_module_reset(mod);
i2c_set_pin((i2c_port_t)i2c_port, sda_io, scl_io, gpio_pullup_t::GPIO_PULLUP_ENABLE, gpio_pullup_t::GPIO_PULLUP_ENABLE, I2C_MODE_MASTER);
#endif
}
static cpp::result<void, error_t> i2c_wait(int i2c_port, bool flg_stop = false)
{
if (i2c_context[i2c_port].state.has_error()) { return cpp::fail(i2c_context[i2c_port].state.error()); }
cpp::result<void, error_t> res = {};
if (i2c_context[i2c_port].state == i2c_context_t::state_disconnect) { return res; }
auto dev = getDev(i2c_port);
typeof(dev->int_raw) int_raw;
static constexpr uint32_t intmask = I2C_ACK_ERR_INT_RAW_M | I2C_END_DETECT_INT_RAW_M | I2C_ARBITRATION_LOST_INT_RAW_M;
if (i2c_context[i2c_port].wait_ack_stage)
{
int_raw.val = dev->int_raw.val;
if (!(int_raw.val & intmask))
{
uint32_t start_us = lgfx::micros();
uint32_t us;
#if defined ( CONFIG_IDF_TARGET_ESP32C3 )
uint32_t us_limit = (dev->scl_high_period.period + dev->scl_low_period.period + 16 ) * (1 + dev->sr.tx_fifo_cnt);
#elif defined ( CONFIG_IDF_TARGET_ESP32S3 )
uint32_t us_limit = (dev->scl_high_period.scl_high_period + dev->scl_low_period.scl_low_period + 16 ) * (1 + dev->sr.txfifo_cnt);
#else
uint32_t us_limit = (dev->scl_high_period.period + dev->scl_low_period.period + 16 ) * (1 + dev->status_reg.tx_fifo_cnt);
#endif
if (i2c_context[i2c_port].wait_ack_stage == 2) {
us_limit += 1024;
}
do
{
taskYIELD();
us = lgfx::micros() - start_us;
int_raw.val = dev->int_raw.val;
} while (!(int_raw.val & intmask) && (us <= us_limit));
}
dev->int_clr.val = int_raw.val;
#if !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32)
if (!int_raw.end_detect || int_raw.ack_err)
#elif defined ( CONFIG_IDF_TARGET_ESP32S3 )
if (!int_raw.end_detect_int_raw || int_raw.nack_int_raw)
#else
if (!int_raw.end_detect || int_raw.nack)
#endif
{
res = cpp::fail(error_t::connection_lost);
i2c_context[i2c_port].state = cpp::fail(error_t::connection_lost);
}
i2c_context[i2c_port].wait_ack_stage = 0;
}
if (flg_stop || res.has_error())
{
#if defined ( CONFIG_IDF_TARGET_ESP32S3 )
if (i2c_context[i2c_port].state == i2c_context_t::state_read || !int_raw.end_detect_int_raw)
#else
if (i2c_context[i2c_port].state == i2c_context_t::state_read || !int_raw.end_detect)
#endif
{ // force stop
i2c_stop(i2c_port);
}
else
{
i2c_set_cmd(dev, 0, i2c_cmd_stop, 0);
i2c_set_cmd(dev, 1, i2c_cmd_end, 0);
dev->ctr.trans_start = 1;
static constexpr uint32_t intmask_ = I2C_ACK_ERR_INT_RAW_M | I2C_TIME_OUT_INT_RAW_M | I2C_END_DETECT_INT_RAW_M | I2C_ARBITRATION_LOST_INT_RAW_M | I2C_TRANS_COMPLETE_INT_RAW_M;
uint32_t ms = lgfx::millis();
taskYIELD();
while (!(dev->int_raw.val & intmask_) && ((millis() - ms) < 14));
#if !defined (CONFIG_IDF_TARGET) || defined (CONFIG_IDF_TARGET_ESP32)
if (res.has_value() && dev->int_raw.ack_err)
#elif defined ( CONFIG_IDF_TARGET_ESP32S3 )
if (res.has_value() && dev->int_raw.nack_int_raw)
#else
if (res.has_value() && dev->int_raw.nack)
#endif
{
res = cpp::fail(error_t::connection_lost);
}
//ESP_LOGI("LGFX", "I2C stop");
}
i2c_context[i2c_port].load_reg(dev);
if (res)
{
i2c_context[i2c_port].state = i2c_context_t::state_t::state_disconnect;
}
i2c_context[i2c_port].unlock();
}
return res;
}
cpp::result<void, error_t> release(int i2c_port)
{
if (i2c_port >= I2C_NUM_MAX) { return cpp::fail(error_t::invalid_arg); }
if (i2c_context[i2c_port].initialized)
{
i2c_context[i2c_port].initialized = false;
#if defined ( ARDUINO ) && __has_include (<Wire.h>) && defined ( ESP_IDF_VERSION_VAL )
#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(4, 0, 0)
#if defined ARDUINO_ESP32_GIT_VER
#if ARDUINO_ESP32_GIT_VER != 0x44c11981
auto twowire = ((i2c_port == 1) ? &Wire1 : &Wire);
twowire->end();
#endif
#endif
#endif