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EPD-nRF52-hema213/EPD/EPD_driver.c
Shuanglei Tao 5dc7a5608f update EPD_FillRAM with length param
2025-06-04 20:56:14 +08:00

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/*****************************************************************************
* | File : DEV_Config.cpp
* | Author : Waveshare team
* | Function :
* | Info :
* Image scanning
* Please use progressive scanning to generate images or fonts
*----------------
* | This version: V1.0
* | Date : 2018-01-11
* | Info : Basic version
*
******************************************************************************/
#include "app_error.h"
#include "nrf_drv_spi.h"
#include "EPD_driver.h"
#include "nrf_log.h"
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define BUFFER_SIZE 128
// GPIO Pins
static uint32_t EPD_MOSI_PIN = 5;
static uint32_t EPD_SCLK_PIN = 8;
static uint32_t EPD_CS_PIN = 9;
static uint32_t EPD_DC_PIN = 10;
static uint32_t EPD_RST_PIN = 11;
static uint32_t EPD_BUSY_PIN = 12;
static uint32_t EPD_BS_PIN = 13;
static uint32_t EPD_EN_PIN = 0xFF;
static uint32_t EPD_LED_PIN = 0xFF;
// EPD model
static epd_model_t *EPD = NULL;
#define SPI_INSTANCE 0 /**< SPI instance index. */
static const nrf_drv_spi_t spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
#if defined(S112)
#define HAL_SPI_INSTANCE spi.u.spi.p_reg
#else
#define HAL_SPI_INSTANCE spi.p_registers
nrf_gpio_pin_dir_t nrf_gpio_pin_dir_get(uint32_t pin)
{
NRF_GPIO_Type * reg = nrf_gpio_pin_port_decode(&pin);
return (nrf_gpio_pin_dir_t)((reg->PIN_CNF[pin] &
GPIO_PIN_CNF_DIR_Msk) >> GPIO_PIN_CNF_DIR_Pos);
}
#endif
// Arduino like function wrappers
void pinMode(uint32_t pin, uint32_t mode)
{
switch (mode)
{
case INPUT:
nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_NOPULL);
break;
case INPUT_PULLUP:
nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_PULLUP);
break;
case INPUT_PULLDOWN:
nrf_gpio_cfg_input(pin, NRF_GPIO_PIN_PULLDOWN);
break;
case OUTPUT:
nrf_gpio_cfg_output(pin);
break;
case DEFAULT:
default:
nrf_gpio_cfg_default(pin);
break;
}
}
// GPIO
static uint16_t m_driver_refs = 0;
void EPD_GPIO_Load(epd_config_t *cfg)
{
if (cfg == NULL) return;
EPD_MOSI_PIN = cfg->mosi_pin;
EPD_SCLK_PIN = cfg->sclk_pin;
EPD_CS_PIN = cfg->cs_pin;
EPD_DC_PIN = cfg->dc_pin;
EPD_RST_PIN = cfg->rst_pin;
EPD_BUSY_PIN = cfg->busy_pin;
EPD_BS_PIN = cfg->bs_pin;
EPD_EN_PIN = cfg->en_pin;
EPD_LED_PIN = cfg->led_pin;
}
void EPD_GPIO_Init(void)
{
if (m_driver_refs++ > 0) return;
pinMode(EPD_DC_PIN, OUTPUT);
pinMode(EPD_RST_PIN, OUTPUT);
pinMode(EPD_BUSY_PIN, INPUT);
nrf_drv_spi_config_t spi_config = NRF_DRV_SPI_DEFAULT_CONFIG;
spi_config.sck_pin = EPD_SCLK_PIN;
spi_config.mosi_pin = EPD_MOSI_PIN;
spi_config.ss_pin = EPD_CS_PIN;
#if defined(S112)
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, NULL, NULL));
#else
APP_ERROR_CHECK(nrf_drv_spi_init(&spi, &spi_config, NULL));
#endif
if (EPD_BS_PIN != 0xFF) {
pinMode(EPD_BS_PIN, OUTPUT);
digitalWrite(EPD_BS_PIN, LOW);
}
if (EPD_EN_PIN != 0xFF) {
pinMode(EPD_EN_PIN, OUTPUT);
digitalWrite(EPD_EN_PIN, HIGH);
}
digitalWrite(EPD_DC_PIN, LOW);
digitalWrite(EPD_RST_PIN, HIGH);
if (EPD_LED_PIN != 0xFF)
pinMode(EPD_LED_PIN, OUTPUT);
EPD_LED_ON();
}
void EPD_GPIO_Uninit(void)
{
if (--m_driver_refs > 0) return;
EPD_LED_OFF();
nrf_drv_spi_uninit(&spi);
digitalWrite(EPD_DC_PIN, LOW);
digitalWrite(EPD_CS_PIN, LOW);
digitalWrite(EPD_RST_PIN, LOW);
if (EPD_EN_PIN != 0xFF)
digitalWrite(EPD_EN_PIN, LOW);
// reset pin state
pinMode(EPD_MOSI_PIN, DEFAULT);
pinMode(EPD_SCLK_PIN, DEFAULT);
pinMode(EPD_CS_PIN, DEFAULT);
pinMode(EPD_DC_PIN, DEFAULT);
pinMode(EPD_RST_PIN, DEFAULT);
pinMode(EPD_BUSY_PIN, DEFAULT);
pinMode(EPD_BS_PIN, DEFAULT);
pinMode(EPD_EN_PIN, DEFAULT);
pinMode(EPD_LED_PIN, DEFAULT);
}
// SPI
void EPD_SPI_Write(uint8_t *value, uint8_t len)
{
nrf_gpio_pin_dir_t dir = nrf_gpio_pin_dir_get(EPD_MOSI_PIN);
if (dir != NRF_GPIO_PIN_DIR_OUTPUT) {
pinMode(EPD_MOSI_PIN, OUTPUT);
nrf_spi_pins_set(HAL_SPI_INSTANCE, EPD_SCLK_PIN, EPD_MOSI_PIN, NRF_SPI_PIN_NOT_CONNECTED);
}
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, value, len, NULL, 0));
}
void EPD_SPI_Read(uint8_t *value, uint8_t len)
{
nrf_gpio_pin_dir_t dir = nrf_gpio_pin_dir_get(EPD_MOSI_PIN);
if (dir != NRF_GPIO_PIN_DIR_INPUT) {
pinMode(EPD_MOSI_PIN, INPUT);
nrf_spi_pins_set(HAL_SPI_INSTANCE, EPD_SCLK_PIN, NRF_SPI_PIN_NOT_CONNECTED, EPD_MOSI_PIN);
}
APP_ERROR_CHECK(nrf_drv_spi_transfer(&spi, NULL, 0, value, len));
}
// EPD
void EPD_WriteCmd(uint8_t cmd)
{
digitalWrite(EPD_DC_PIN, LOW);
EPD_SPI_Write(&cmd, 1);
}
void EPD_WriteData(uint8_t *value, uint8_t len)
{
digitalWrite(EPD_DC_PIN, HIGH);
EPD_SPI_Write(value, len);
}
void EPD_ReadData(uint8_t *value, uint8_t len)
{
digitalWrite(EPD_DC_PIN, HIGH);
EPD_SPI_Read(value, len);
}
void EPD_WriteByte(uint8_t value)
{
digitalWrite(EPD_DC_PIN, HIGH);
EPD_SPI_Write(&value, 1);
}
uint8_t EPD_ReadByte(void)
{
uint8_t value;
digitalWrite(EPD_DC_PIN, HIGH);
EPD_SPI_Read(&value, 1);
return value;
}
void EPD_FillRAM(uint8_t cmd, uint8_t value, uint32_t len)
{
uint8_t buffer[BUFFER_SIZE];
for (uint8_t i = 0; i < BUFFER_SIZE; i++)
buffer[i] = value;
EPD_WriteCmd(cmd);
uint16_t remaining = len;
while (remaining > 0) {
uint16_t chunk_size = (remaining > BUFFER_SIZE) ? BUFFER_SIZE : remaining;
EPD_WriteData(buffer, chunk_size);
remaining -= chunk_size;
}
}
void EPD_Reset(uint32_t value, uint16_t duration)
{
digitalWrite(EPD_RST_PIN, value);
delay(10);
digitalWrite(EPD_RST_PIN, (value == LOW) ? HIGH : LOW);
delay(duration);
digitalWrite(EPD_RST_PIN, value);
delay(duration);
}
void EPD_WaitBusy(uint32_t value, uint16_t timeout)
{
uint32_t led_status = digitalRead(EPD_LED_PIN);
NRF_LOG_DEBUG("[EPD]: check busy\n");
while (digitalRead(EPD_BUSY_PIN) == value) {
if (timeout % 100 == 0) EPD_LED_Toggle();
delay(1);
timeout--;
if (timeout == 0) {
NRF_LOG_DEBUG("[EPD]: busy timeout!\n");
break;
}
}
NRF_LOG_DEBUG("[EPD]: busy release\n");
// restore led status
if (led_status == LOW)
EPD_LED_ON();
else
EPD_LED_OFF();
}
// lED
void EPD_LED_ON(void)
{
if (EPD_LED_PIN != 0xFF)
digitalWrite(EPD_LED_PIN, LOW);
}
void EPD_LED_OFF(void)
{
if (EPD_LED_PIN != 0xFF)
digitalWrite(EPD_LED_PIN, HIGH);
}
void EPD_LED_Toggle(void)
{
if (EPD_LED_PIN != 0xFF)
nrf_gpio_pin_toggle(EPD_LED_PIN);
}
void EPD_LED_BLINK(void)
{
if (EPD_LED_PIN != 0xFF) {
pinMode(EPD_LED_PIN, OUTPUT);
digitalWrite(EPD_LED_PIN, LOW);
delay(100);
digitalWrite(EPD_LED_PIN, HIGH);
delay(100);
pinMode(EPD_LED_PIN, DEFAULT);
}
}
float EPD_ReadVoltage(void)
{
#if defined(S112)
volatile int16_t value = 0;
NRF_SAADC->RESOLUTION = SAADC_RESOLUTION_VAL_10bit;
NRF_SAADC->ENABLE = (SAADC_ENABLE_ENABLE_Enabled << SAADC_ENABLE_ENABLE_Pos);
NRF_SAADC->CH[0].CONFIG = ((SAADC_CH_CONFIG_RESP_Bypass << SAADC_CH_CONFIG_RESP_Pos) & SAADC_CH_CONFIG_RESP_Msk)
| ((SAADC_CH_CONFIG_RESP_Bypass << SAADC_CH_CONFIG_RESN_Pos) & SAADC_CH_CONFIG_RESN_Msk)
| ((SAADC_CH_CONFIG_GAIN_Gain1_6 << SAADC_CH_CONFIG_GAIN_Pos) & SAADC_CH_CONFIG_GAIN_Msk)
| ((SAADC_CH_CONFIG_REFSEL_Internal << SAADC_CH_CONFIG_REFSEL_Pos) & SAADC_CH_CONFIG_REFSEL_Msk)
| ((SAADC_CH_CONFIG_TACQ_3us << SAADC_CH_CONFIG_TACQ_Pos) & SAADC_CH_CONFIG_TACQ_Msk)
| ((SAADC_CH_CONFIG_MODE_SE << SAADC_CH_CONFIG_MODE_Pos) & SAADC_CH_CONFIG_MODE_Msk);
NRF_SAADC->CH[0].PSELN = SAADC_CH_PSELN_PSELN_NC;
NRF_SAADC->CH[0].PSELP = SAADC_CH_PSELP_PSELP_VDD;
NRF_SAADC->RESULT.PTR = (uint32_t)&value;
NRF_SAADC->RESULT.MAXCNT = 1;
NRF_SAADC->TASKS_START = 0x01UL;
while (!NRF_SAADC->EVENTS_STARTED);
NRF_SAADC->EVENTS_STARTED = 0x00UL;
NRF_SAADC->TASKS_SAMPLE = 0x01UL;
while (!NRF_SAADC->EVENTS_END);
NRF_SAADC->EVENTS_END = 0x00UL;
NRF_SAADC->TASKS_STOP = 0x01UL;
while (!NRF_SAADC->EVENTS_STOPPED);
NRF_SAADC->EVENTS_STOPPED = 0x00UL;
if (value < 0) value = 0;
NRF_SAADC->ENABLE = (SAADC_ENABLE_ENABLE_Disabled << SAADC_ENABLE_ENABLE_Pos);
#else
NRF_ADC->ENABLE = 1;
NRF_ADC->CONFIG = (ADC_CONFIG_RES_10bit << ADC_CONFIG_RES_Pos) |
(ADC_CONFIG_INPSEL_SupplyOneThirdPrescaling << ADC_CONFIG_INPSEL_Pos) |
(ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) |
(ADC_CONFIG_PSEL_Disabled << ADC_CONFIG_PSEL_Pos) |
(ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos);
NRF_ADC->TASKS_START = 1;
while(!NRF_ADC->EVENTS_END);
NRF_ADC->EVENTS_END = 0;
uint16_t value = NRF_ADC->RESULT;
NRF_ADC->TASKS_STOP = 1;
NRF_ADC->ENABLE = 0;
#endif
NRF_LOG_DEBUG("ADC value: %d\n", value);
return (value * 3.6) / (1 << 10);
}
// EPD models
extern epd_model_t epd_uc8176_420_bw;
extern epd_model_t epd_uc8176_420_bwr;
extern epd_model_t epd_ssd1619_420_bwr;
extern epd_model_t epd_ssd1619_420_bw;
static epd_model_t *epd_models[] = {
&epd_uc8176_420_bw,
&epd_uc8176_420_bwr,
&epd_ssd1619_420_bwr,
&epd_ssd1619_420_bw,
};
epd_model_t *epd_get(void)
{
return EPD == NULL ? epd_models[0] : EPD;
}
epd_model_t *epd_init(epd_model_id_t id)
{
for (uint8_t i = 0; i < ARRAY_SIZE(epd_models); i++) {
if (epd_models[i]->id == id) {
EPD = epd_models[i];
}
}
if (EPD == NULL) EPD = epd_models[0];
EPD->drv->init();
return EPD;
}
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