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epaper
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barebones project to get hacking

master
Daniel Peter Chokola 3 years ago
parent
ff96ded598
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fcea5d9d1b
7 changed files with 445 additions and 0 deletions
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  1. 7
      .vscode/extensions.json
  2. 29
      .vscode/launch.json
  3. 16
      .vscode/settings.json
  4. 42
      CMakeLists.txt
  5. 48
      epaper.c
  6. 241
      epd_4p2b.h
  7. 62
      pico_sdk_import.cmake

7
.vscode/extensions.json vendored
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{
"recommendations": [
"marus25.cortex-debug",
"ms-vscode.cmake-tools",
"ms-vscode.cpptools"
]
}

29
.vscode/launch.json vendored
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{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "Cortex Debug",
"cwd": "${workspaceRoot}",
"executable": "${command:cmake.launchTargetPath}",
"request": "launch",
"type": "cortex-debug",
"servertype": "openocd",
"gdbPath": "gdb-multiarch",
"device": "RP2040",
"configFiles": [
"interface/picoprobe.cfg",
"target/rp2040.cfg"
],
"svdFile": "${env:PICO_SDK_PATH}/src/rp2040/hardware_regs/rp2040.svd",
"runToMain": true,
// Give restart the same functionality as runToMain
"postRestartCommands": [
"break main",
"continue"
]
}
]
}

16
.vscode/settings.json vendored
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{
"cmake.configureOnOpen": false,
"cmake.statusbar.advanced": {
"debug" : {
"visibility": "hidden"
}, "launch" : {
"visibility": "hidden"
},
"build" : {
"visibility": "hidden"
},
"buildTarget" : {
"visibility": "hidden"
},
},
}

42
CMakeLists.txt
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# Generated Cmake Pico project file
cmake_minimum_required(VERSION 3.13)
set(CMAKE_C_STANDARD 11)
set(CMAKE_CXX_STANDARD 17)
# Initialise pico_sdk from installed location
# (note this can come from environment, CMake cache etc)
set(PICO_SDK_PATH "/home/dan/pico/pico-sdk")
# Pull in Raspberry Pi Pico SDK (must be before project)
include(pico_sdk_import.cmake)
project(epaper C CXX ASM)
# Initialise the Raspberry Pi Pico SDK
pico_sdk_init()
# Add executable. Default name is the project name, version 0.1
add_executable(epaper epaper.c )
pico_set_program_name(epaper "epaper")
pico_set_program_version(epaper "0.1")
pico_enable_stdio_uart(epaper 1)
pico_enable_stdio_usb(epaper 0)
# Add the standard library to the build
target_link_libraries(epaper pico_stdlib)
# Add any user requested libraries
target_link_libraries(epaper
hardware_spi
hardware_dma
hardware_pio
hardware_timer
)
pico_add_extra_outputs(epaper)

48
epaper.c
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#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/spi.h"
#include "hardware/dma.h"
#include "hardware/pio.h"
#include "hardware/timer.h"
// SPI Defines
// We are going to use SPI 0, and allocate it to the following GPIO pins
// Pins can be changed, see the GPIO function select table in the datasheet for information on GPIO assignments
#define SPI_PORT spi0
#define PIN_MISO 16
#define PIN_CS 17
#define PIN_SCK 18
#define PIN_MOSI 19
int64_t alarm_callback(alarm_id_t id, void *user_data) {
// Put your timeout handler code in here
return 0;
}
int main()
{
stdio_init_all();
// SPI initialisation. This example will use SPI at 1MHz.
spi_init(SPI_PORT, 1000*1000);
gpio_set_function(PIN_MISO, GPIO_FUNC_SPI);
gpio_set_function(PIN_CS, GPIO_FUNC_SIO);
gpio_set_function(PIN_SCK, GPIO_FUNC_SPI);
gpio_set_function(PIN_MOSI, GPIO_FUNC_SPI);
// Chip select is active-low, so we'll initialise it to a driven-high state
gpio_set_dir(PIN_CS, GPIO_OUT);
gpio_put(PIN_CS, 1);
// Timer example code - This example fires off the callback after 2000ms
add_alarm_in_ms(2000, alarm_callback, NULL, false);
puts("Hello, world!");
return 0;
}

241
epd_4p2b.h
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#include "stdint.h"
/* Definitions */
#define CMD_PSR (0x00) /* panel settings */
#define CMD_PWR (0x01) /* power settings */
#define CMD_POF (0x02) /* power off */
#define CMD_PFS (0x03) /* power off sequence settings */
#define CMD_PON (0x04) /* power on */
#define CMD_PMES (0x05) /* power on measure */
#define CMD_BTST (0x06) /* booster soft-start */
#define CMD_DSLP (0x07) /* deep sleep */
#define CMD_DTM1 (0x10) /* display start transmission 1 (white/black data) */
#define CMD_DSP (0x11) /* data stop */
#define CMD_DRF (0x12) /* display refresh */
#define CMD_DTM2 (0x13) /* display start transmission 2 (red data) */
#define CMD_PLL (0x30) /* PLL control */
#define CMD_TSC (0x40) /* temperature sensor calibration */
#define CMD_TSE (0x41) /* temperature sensor selection */
#define CMD_TSW (0x42) /* temperature sensor write */
#define CMD_TSR (0x43) /* temperature sensor read */
#define CMD_CDI (0x50) /* VCOM and data interval settings */
#define CMD_LPD (0x51) /* low power detection */
#define CMD_TCON (0x60) /* TCON settings */
#define CMD_TRES (0x61) /* resolution settings */
#define CMD_GSST (0x65) /* GSST settings */
#define CMD_REV (0x70) /* revision */
#define CMD_FLG (0x71) /* get status */
#define CMD_VCOM (0x80) /* auto-measurement */
#define CMD_VV (0x81) /* read VCOM value */
#define CMD_VDCS (0x82) /* VCOM_DC settings */
#define CMD_PTL (0x90) /* partial window */
#define CMD_PTIN (0x91) /* partial in */
#define CMD_PTOUT (0x92) /* partial out */
#define CMD_PGM (0xa0) /* program mode */
#define CMD_APG (0xa1) /* active programming */
#define CMD_ROTP (0xa2) /* read OTP */
#define CMD_CCSET (0xe0) /* cascade settings */
#define CMD_PWS (0xe3) /* power saving */
#define CMD_LPSEL (0xe4) /* LPD selection */
#define CMD_TSSET (0xe5) /* force temperature */
/* Data Structures */
typedef union psr_u = {
struct __attribute__((packed)) psr_s = {
uint8_t rst_n : 1, /* soft reset */
uint8_t shd_n : 1, /* booster switch */
uint8_t shl : 1, /* horizontal scan direction */
uint8_t ud : 1, /* vertical scan direction */
uint8_t _na0 : 1, /* don't care */
uint8_t reg : 1, /* B/W/R or B/W */
uint8_t res : 2 /* display resolution */
} field,
uint8_t u8
} psr_t;
typedef union pwr_u = {
struct __attribute__((packed)) pwr_s = {
uint8_t vdhr : 6, /* internal VDHR power selection for red pixel */
uint8_t _na4 : 2, /* don't care */
uint8_t vdl : 6, /* internal VDL power selectrion for B/W pixel */
uint8_t _na3 : 2, /* don't care */
uint8_t vdh : 6, /* internal VDH power selection for B/W pixel */
uint8_t _na2 : 2, /* don't care */
uint8_t vghl_lv : 2, /* VGH/VGL voltage level selection */
uint8_t vcom_hv : 1, /* VCOM voltage level */
uint8_t _na1 : 5, /* don't care */
uint8_t vdg_en : 1, /* gate power selection */
uint8_t vds_en : 1, /* source power selection */
uint8_t _na0 : 6 , /* don't care */
} field,
uint8_t u8[5];
} pwr_t;
typedef union pfs_u = {
struct __attribute__((packed)) pfs_s = {
uint8_t _na1 : 4, /* don't care */
uint8_t t_vds_off : 2, /* power off sequence of VDH and VDL */
uint8_t _na0 : 2 /* don't care */
} field,
uint8_t u8
} pfs_t;
typedef union btst_u = {
struct __attribute__((packed)) btst_s = {
uint8_t bt_phc : 6, /* phase C: drive strength / minimum GDR off time */
uint8_t _na0 : 2, /* display resolution */
uint8_t bt_phb : 8, /* phase B: soft-start period / drive strength / minimum GDR off time */
uint8_t bt_pha : 8 /* phase A: soft-start period / drive strength / minimum GDR off time */
} field,
uint8_t u8[3]
} btst_t;
typedef union pll_u = {
struct __attribute__((packed)) pll_s = {
uint8_t n : 3, /* N: 1-7 */
uint8_t m : 3, /* M: 1-7 */
uint8_t _na0 : 2 /* don't care */
} field,
uint8_t u8
} pll_t;
typedef uint16_t tsc_t;
typedef union tse_u = {
struct tse_t = {
uint8_t to : 4, /* temperature offset */
uint8_t _na0 : 3, /* don't care */
uint8_t tse : 1 /* internal temperature sensor switch */
} field,
uint8_t u8
} tse_t;
typedef union tsw_u = {
struct __attribute__((packed)) tsw_s = {
uint8_t wlsb : 8, /* LSB of data to write to external temperature sensor */
uint8_t wmsb : 8, /* MSB of data to write to external temperature sensor */
uint8_t wattr : 8 /* I2C write byte number */
} field,
uint8_t u8[3]
} tsw_t;
typedef union tsr_u = {
struct __attribute__((packed)) tsr_s = {
uint8_t rlsb : 8, /* LSB of data to read from external temperature sensor */
uint8_t rmsb : 8 /* MSB of data to read from external temperature sensor */
} field,
uint8_t u8[2]
} tsr_t;
typedef union cdi_u = {
struct __attribute__((packed)) cdi_s = {
uint8_t cdi : 4, /* VCOM and data interval */
uint8_t ddx : 2, /* data polarity */
uint8_t vbd : 2 /* border data selection */
} field,
uint8_t u8
} cdi_t;
typedef union lpd_u = {
struct __attribute__((packed)) lpd_s = {
uint8_t lpd : 1, /* low power detection flag */
uint8_t _na0 : 7 /* don't care */
} field,
uint8_t u8
} lpd_t;
typedef union tcon_u = {
struct __attribute__((packed)) tcon_s = {
uint8_t g2s : 8, /* gate to source dead time */
uint8_t s2g : 8 /* source to gate dead time */
} field,
uint8_t u8[2]
} tcon_t;
typedef union tres_u = {
struct __attribute__((packed)) tres_s = {
uint16_t _na1 : 7, /* don't care */
uint16_t hres : 9, /* horizontal resolution */
uint16_t _na0 : 7, /* don't care */
uint16_t vres : 9 /* vertical resolution */
} field,
uint8_t u8[4],
uint16_t u16[2],
uint32_t u32
} tres_t;
typedef union gsst_u = {
struct __attribute__((packed)) gsst_s = {
uint16_t _na1 : 7, /* don't care */
uint16_t hst : 9, /* first active source */
uint16_t _na0 : 7, /* don't care */
uint16_t vst : 9 /* first active gate */
} field,
uint8_t u8[4],
uint16_t u16[2],
uint32_t u32
} gsst_t;
typedef uint8_t rev_t;
typedef union flg_u = {
struct __attribute__((packed)) flg_s = {
uint8_t busy_n : 1, /* driver busy status */
uint8_t pof : 1, /* power off status */
uint8_t pon : 1, /* power on status */
uint8_t date_flag : 1, /* driver has received one frame of data */
uint8_t i2c_busyn : 1, /* I2C master busy */
uint8_t i2c_err : 1, /* I2C master error */
uint8_t ptl_flag : 1, /* partial display status */
uint8_t _na0 : 1 /* don't care */
} field,
uint8_t u8
} flg_t;
typedef union amv_u = {
struct __attribute__((packed)) amv_s = {
uint8_t amve : 1, /* auto measure VCOM (AMV) enable */
uint8_t amv : 1, /* analog signal */
uint8_t amvs : 1, /* source output of AMV */
uint8_t xon : 1, /* status of gates during AMV */
uint8_t amvt : 2, /* AMV time */
uint8_t _na0 : 2 /* don't care */
} field,
uint8_t u8
} amv_t;
typedef union vv_u = {
struct __attribute__((packed)) vv_s = {
uint8_t vv : 6, /* VCOM value */
uint8_t _na0 : 2 /* don't care */
} field,
uint8_t u8
} vv_t;
typedef union vcds_u = {
struct __attribute__((packed)) vcds_s = {
uint8_t vcds : 6, /* VCOM_DC value */
uint8_t _na0 : 2 /* don't care */
} field,
uint8_t u8
} vcds_t;
typedef union ptl_u = {
struct __attribute__((packed)) ptl_s = {
uint8_t pt_scan : 1, /* limit scan inside partial window */
uint8_t _na4 : 7, /* don't care */
uint16_t vred : 9, /* vertical end line */
uint16_t _na3 : 7, /* don't care */
uint16_t vrst : 9, /* vertical start line */
uint16_t _na2 : 7, /* don't care */
uint16_t hred : 9, /* horizontal end line */
uint16_t _na1 : 7, /* don't care */
uint16_t hrst : 9, /* horizontal start line */
uint16_t _na0 : 7 /* don't care */
} field,
uint8_t u8[5]
} ptl_t;
typedef union ccset_u = {
struct __attribute__((packed)) ccset_s = {
uint8_t ccen : 1, /* output clock enable */
uint8_t tsfix : 1, /* set the slave temperature equal to the master */
uint8_t _na0 : 6 /* don't care */
} field,
uint8_t u8
} ccset_t;
typedef union pws_u = {
struct __attribute__((packed)) pws_s = {
uint8_t sd_w : 4, /* source power saving width */
uint8_t vcom_w : 4 /* VCOM power saving width */
} field,
uint8_t u8
} pws_t;
typedef union lpsel_u = {
struct __attribute__((packed)) lpsel_s = {
uint8_t lp_sel : 2, /* LPD level setting */
uint8_t lpmd : 1, /* low power / panel break detection */
uint8_t _na0 : 5 /* don't care */
} field,
uint8_t u8
} lpsel_t;

62
pico_sdk_import.cmake
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# This is a copy of <PICO_SDK_PATH>/external/pico_sdk_import.cmake
# This can be dropped into an external project to help locate this SDK
# It should be include()ed prior to project()
if (DEFINED ENV{PICO_SDK_PATH} AND (NOT PICO_SDK_PATH))
set(PICO_SDK_PATH $ENV{PICO_SDK_PATH})
message("Using PICO_SDK_PATH from environment ('${PICO_SDK_PATH}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT} AND (NOT PICO_SDK_FETCH_FROM_GIT))
set(PICO_SDK_FETCH_FROM_GIT $ENV{PICO_SDK_FETCH_FROM_GIT})
message("Using PICO_SDK_FETCH_FROM_GIT from environment ('${PICO_SDK_FETCH_FROM_GIT}')")
endif ()
if (DEFINED ENV{PICO_SDK_FETCH_FROM_GIT_PATH} AND (NOT PICO_SDK_FETCH_FROM_GIT_PATH))
set(PICO_SDK_FETCH_FROM_GIT_PATH $ENV{PICO_SDK_FETCH_FROM_GIT_PATH})
message("Using PICO_SDK_FETCH_FROM_GIT_PATH from environment ('${PICO_SDK_FETCH_FROM_GIT_PATH}')")
endif ()
set(PICO_SDK_PATH "${PICO_SDK_PATH}" CACHE PATH "Path to the Raspberry Pi Pico SDK")
set(PICO_SDK_FETCH_FROM_GIT "${PICO_SDK_FETCH_FROM_GIT}" CACHE BOOL "Set to ON to fetch copy of SDK from git if not otherwise locatable")
set(PICO_SDK_FETCH_FROM_GIT_PATH "${PICO_SDK_FETCH_FROM_GIT_PATH}" CACHE FILEPATH "location to download SDK")
if (NOT PICO_SDK_PATH)
if (PICO_SDK_FETCH_FROM_GIT)
include(FetchContent)
set(FETCHCONTENT_BASE_DIR_SAVE ${FETCHCONTENT_BASE_DIR})
if (PICO_SDK_FETCH_FROM_GIT_PATH)
get_filename_component(FETCHCONTENT_BASE_DIR "${PICO_SDK_FETCH_FROM_GIT_PATH}" REALPATH BASE_DIR "${CMAKE_SOURCE_DIR}")
endif ()
FetchContent_Declare(
pico_sdk
GIT_REPOSITORY https://github.com/raspberrypi/pico-sdk
GIT_TAG master
)
if (NOT pico_sdk)
message("Downloading Raspberry Pi Pico SDK")
FetchContent_Populate(pico_sdk)
set(PICO_SDK_PATH ${pico_sdk_SOURCE_DIR})
endif ()
set(FETCHCONTENT_BASE_DIR ${FETCHCONTENT_BASE_DIR_SAVE})
else ()
message(FATAL_ERROR
"SDK location was not specified. Please set PICO_SDK_PATH or set PICO_SDK_FETCH_FROM_GIT to on to fetch from git."
)
endif ()
endif ()
get_filename_component(PICO_SDK_PATH "${PICO_SDK_PATH}" REALPATH BASE_DIR "${CMAKE_BINARY_DIR}")
if (NOT EXISTS ${PICO_SDK_PATH})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' not found")
endif ()
set(PICO_SDK_INIT_CMAKE_FILE ${PICO_SDK_PATH}/pico_sdk_init.cmake)
if (NOT EXISTS ${PICO_SDK_INIT_CMAKE_FILE})
message(FATAL_ERROR "Directory '${PICO_SDK_PATH}' does not appear to contain the Raspberry Pi Pico SDK")
endif ()
set(PICO_SDK_PATH ${PICO_SDK_PATH} CACHE PATH "Path to the Raspberry Pi Pico SDK" FORCE)
include(${PICO_SDK_INIT_CMAKE_FILE})
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